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Dimensional Drawing

Shafts - Surface Treatment Fully Plated: Related Image

Straight Type PSFCJ

Both Ends Tapped PSFCW

One End Tapped PSFCT

One End Stepped, Tapped PSFCG

One End Stepped, Both Ends Tapped PSFCA

One End Threaded PSFCN

Both Ends Threaded PSFCM

One End Threaded with O.D. same as Shaft O.D. PSFCQ

Both Ends Threaded with O.D. same as Shaft O.D. PSFCL

One End Tapered, One End Tapped PSFTCA

One End Tapered, One End Threaded PSFTCB

[ ! ] The dimension tolerances for L, F, and T conform to JIS B 0405 Class m.

[!] Use "Oil-Free Bushings" for sliding applications.
(Using rolling ball elements such as linear ball bushings on electroless nickel plated shafts may result in flaking of the nickel plating layer.)

[ ! ] Annealing may lower hardness at shaft end machined areas (effective thread length + approx. 10 mm).
[ ! ] Shafts may have centering holes at end faces depending on shapes.

Type					D Tol.	[M] Material	[H] Hardness	[S]Surface Treatment
Straight	One End Tapped	Both Ends Tapped	One End Stepped and Tapped	One End Stepped, Both Ends Tapped	D Tol.	[M] Material	[H] Hardness	[S]Surface Treatment
PSFCJ	PSFCT	PSFCW	PSFCG	PSFCA	g6	EN 1.3505 Equiv.	Induction Hardened EN 1.3505 Equiv. 58 HRC or more	Electroless Nickel Plating

Type						D Tol.	[M] Material	[H] Hardness	[S]Surface Treatment
One End Threaded	Both Ends Threaded	One End Threaded, O.D. same as Shaft O.D.	Both Ends Threaded, O.D. same as Shaft O.D.	One End Tapered, One End Tapped	One End Tapered, One End Threaded	D Tol.	[M] Material	[H] Hardness	[S]Surface Treatment
PSFCN	PSFCM	PSFCQ	PSFCL	PSFTCA	PSFTCB	g6	EN 1.3505 Equiv.	Induction Hardened EN 1.3505 Equiv. 58 HRC or more	Electroless Nickel Plating

Specification Table

Part Number	—	L	—	F	—	P	—	M	—	N
PSFCJ20	—	75
PSFCT20	—	525					—	M8
PSFCW20	—	525					—	M8	—	N8
PSFCG20	—	400	—	F25	—	P16	—	M10
PSFCA20	—	400	—	F25	—	P16	—	M10	—	N10

Part Number	—	L	—	F	—	B	—	P	—	T	—	S	—	Q	—	J	—	M
PSFCN20	—	950	—	F50	—	B30	—	P10
PSFCM20	—	300	—	F30	—	B20	—	P8	—	T20	—	S15	—	Q10
PSFCQ12	—	500			—	B20
PSFCL12	—	500			—	B20					—	S20
PSFTCA20	—	350													—	J15	—	M6
PSFTCB20	—	350	—	F40	—	B30	—	P10							—	J10

■Straight Type, One End Tapped Type, Both Ends Tapped Type

Part Number		1 mm Increments	Selection																						C
Type	D	L	M (Coarse)											N (Coarse) (Both Ends Tapped Only)											C
Straight Type PSFCJ One End Tapped PSFCT Both Ends Tapped PSFCW	8	20 to 800	3	4	5									3	4	5									0.5 or Less
	10	20 to 800	3	4	5	6								3	4	5	6
	12	20 to 1000		4	5	6	8								4	5	6	8
	15	25 to 1000		4	5	6	8	10							4	5	6	8	10
	20	30 to 1000		4	5	6	8	10	12						4	5	6	8	10	12					1.0 or Less
	25	35 to 1000		4	5	6	8	10	12	16					4	5	6	8	10	12	16
	30	35 to 1000				6	8	10	12	16	20						6	8	10	12	16	20
	35	35 to 1000					8	10	12	16	20	24						8	10	12	16	20	24
	40	50 to 1000						10	12	16	20	24	30						10	12	16	20	24	30
	50	65 to 1000							12	16	20	24	30							12	16	20	24	30

[!] One End Tapped Type The overall length L requires M × 2 ≤ L. When M × 2.5 + 4 ≥ L, tap pilot holes go through.
[!] Both Ends Tapped The overall length L requires M × 2 + N × 2 ≤ L. When M × 2 + N × 2 = L, the tapped does not go through.
When M × 2.5 + 4 + N × 2.5 + 4 ≥ L, the tap pilot hole is through, and the priority is given to the large tap effective length, so the small tap effective length becomes shorter.

■One End Stepped and Tapped, One End Stepped and Both Ends Tapped

Part Number		1 mm Increments			Selection																						(Y) Max.	R	C
Type	D	L	F	P	M (Coarse)											N (Coarse) (for One End Stepped, Both Ends Tapped Type only)											(Y) Max.	R	C
One End Stepped and Tapped PSFCG One End Stepped Both Ends Tapped PSFCA	8	25 to 798	2 ≤ F ≤ P × 4	6	3											3	4	5									800	0.4 or Less	0.5 or Less
	10	25 to 798		6 to 8	3	4	5									3	4	5	6								800
	12	25 to 998		6 to 10	3	4	5	6									4	5	6	8							1000
	15	25 to 998		6 to 13	3	4	5	6	8	10							4	5	6	8	10						1000
	20	25 to 998		8 to 17		4	5	6	8	10	12						4	5	6	8	10	12					1000		1.0 or Less
	25	25 to 998		8 to 22		4	5	6	8	10	12	16					4	5	6	8	10	12	16				1000
	30	25 to 998		9 to 27			5	6	8	10	12	16	20	24					6	8	10	12	16	20			1000
	35	25 to 998		9 to 32			5	6	8	10	12	16	20	24						8	10	12	16	20	24		1000	0.5 or Less
	40	25 to 998		11 to 37				6	8	10	12	16	20	24	30						10	12	16	20	24	30	1000
	50	25 to 998		11 to 47				6	8	10	12	16	20	24	30							12	16	20	24	30	1000

[!] One End Stepped and Tapped P dimensions require M + 3 ≤ P. Overall length (Y) requires M × 2 ≤ (Y). When M × 2.5 + 4 ≥ (Y), tap pilot holes go through.
[!] One End Stepped, Both Ends Tapped P dimension requires M + 3 ≤ P. Overall length (Y) requires M × 2 + N × 2 ≤ (Y). When M × 2 + N × 2 = (Y), the tapped does not go through.
When M × 2.5 + 4 + N × 2.5 + 4 ≥ (Y), the tap pilot hole is through, and the priority is given to the large tap effective length, so the small tap effective length becomes shorter.

■One End Threaded, Both Ends Threaded

Part Number		1 mm Increments			P (Coarse), Q (Coarse) Applicable to Both Ends Threaded only											(Y) Max.	R	C
Type	D	L	F·T (for Both Ends Threaded only)	B·S (for Both Ends Threaded only)												(Y) Max.	R	C
One End Threaded PSFCN Both Ends Threaded PSFCM	8	25 to 798	2 ≤ F ≤ P × 5	(When P, Q ≤ 6) B (S) ≤ F－2 (When P, Q = 8, 10) B (S) ≤ F－3 (P·Q ≥ 12) B (S) ≤ F－5 [ ! ] B (S) ≥ Pitch × 3	3	4	5	6								800	0.4 or Less	0.5 or Less
	10	25 to 798				4	5	6	8							800
	12	25 to 998					5	6	8	10						1000
	15	25 to 998					5	6	8	10	12					1000		1.0 or Less
	20	25 to 998						6	8	10	12	16				1000
	25	25 to 998							8	10	12	16	20	24		1000
	30	25 to 998							8	10	12	16	20	24		1000
	35	25 to 998								10	12	16	20	24	30	1000	0.5 or Less
	40	25 to 998									12	16	20	24	30	1000
	50	25 to 998										16	20	24	30	1000

■One End Threaded with O.D. same as Shaft O.D Both Ends Threaded with O.D. same as Shaft O.D.

Part Number		1 mm Increments		M (Coarse)	(Y) Max.	C
Type	D	L	B·S (for Both Ends Threaded only)	M (Coarse)	(Y) Max.	C
One End Threaded PSFCQ Both Ends Threaded PSFCL	8	25 to 793	7 to 40	8	800	0.5 or Less
	10	25 to 795	8 to 50	10	800
	12	25 to 991	9 to 60	12	1000
	20	25 to 987	13 to 100	20	1000	1.0 or Less
	30	25 to 982	18 to 150	30	1000	1.0 or Less

[ ! ] For Shafts with O.D. same as Shaft O.D., L dimensions have priority, thus the effective thread length of B(S) dimension will be B(S) - (Pitch × 2).

■One End Tapered, One End Tapped One End Tapered, One End Threaded

Part Number		1 mm Increments			P (Coarse) Applicable to Threaded only										M (Coarse) (for Tapped type only)								1 mm Increments	(Y) Max.	R	C
Type	D	L	F (for Threaded Type only)	B (for Threaded Type only)	P (Coarse) Applicable to Threaded only										M (Coarse) (for Tapped type only)								J	(Y) Max.	R	C
One End Tapered, One End Tapped PSFTCA One End Tapered, One End Threaded PSFTCB	8	25 to 500	2 ≤ F ≤ P × 5	(When P ≤ 6) B ≤ F－2 (When P = 8, 10) B ≤ F－3 (When P ≥ 12) B ≤ F−5 (W/o Threads) B = 0	3	4	5	6							3	4	5						5 to 10	510	0.4 or Less	0.5 or Less
	10	25 to 500				4	5	6	8						3	4	5	6					5 to 14	510
	12	25 to 500					5	6	8	10						4	5	6	8				5 to 18	510
	15	25 to 500					5	6	8	10	12					4	5	6	8				10 to 24	510
	20	25 to 500						6	8	10	12	16				4	5	6	8	10	12		10 to 32	510		1.0 or Less
	30	25 to 500							8	10	12	16	20	24		4	5	6	8	10	12	16	10 to 32	510		1.0 or Less

[ ! ] L dimension requires L - J ≥ 20.

■Details of Thread Section C Chamfering

Thread Nominal M	Pitch P	Chamfering C (Reference Value)
3	0.50	0.50
4	0.70	0.75
5	0.80	0.75
6	1.00	1.00
8	1.25	1.25
10	1.50	1.50
12	1.75	1.75
16	2.00	2.00
20	2.50	2.50
24	3.00	3.00
30	3.50	3.50

C chamfering at Thread Tip

Alteration Details

·See below for alteration.
* Alteration part will also be surface treated.
* When selecting multiple alterations, the distance between machined areas should be 2 mm or more.
* Alteration may lower hardness.

■Straight, One End Tapped, Both Ends Tapped, One End Stepped and Tapped, One End Stepped and Both Ends Tapped

Alteration Code

Alteration Details

Fixed Dimension

Applicable Conditions

Ordering Example

LKC

Change L tolerance to a higher precision level

Shafts - Surface Treatment Fully Plated Related Image 1_Alterations Details

·L < 200→L±0.03
·200 ≤ L < 500→L±0.05
·L ≥ 500→L±0.1

[ ! ]L Dimension can be specified in 0.1 mm increments

[NG]Not applicable to One End Threaded/Shafts with O.D. same as Shaft O.D.

PSFCW20-525.5-M8-N8-LKC

Wrench Flat at One Location

Shafts - Surface Treatment Fully Plated Related Image 2_Alterations Details

D	W	ℓ1	D	W	ℓ1
8	7	8	25	22	10
10	8	8	30	27	15
12	10	10	35	30	15
15	13		40	36	20
20	17		50	41	20

[ ! ]SC = 1 mm Increments
[ ! ]SC+ℓ1 ≤ L
[ ! ]SC ≥ 0

PSFCW20-525-M8-N8-SC5

Set Screw Flat at One Location

Shafts - Surface Treatment Fully Plated Related Image 3_Alterations Details

D	h
8 to 15	1
20 to 40	2
50	3

[ ! ]FC, E = 1 mm Increments
[ ! ]FC ≤ D × 3
[ ! ] When 1.5 × D < FC, FC ≤ L/2
[ ! ]E = 0 or E ≥ 2

PSFCW20-525-M8-N8-FC10-E8

MSC
NSC

Change Tapped Thread to Fine Thread

Shafts - Surface Treatment Fully Plated Related Image 4_Alterations Details

D·P	MSC·NSC
12	8
15	8	10
20	8	10	12	14
25 to 35	8	10	12	14	18
40		10	12	14	18
50			12	14	18
Pitch	1.0	1.25	1.5

[ ! ]Applicable to D = 12 or more

[NG] Not available in combination with MD, ND

PSFCW20-525-MSC14-NSC14

■One End Threaded, Both Ends Threaded, One End Threaded with O.D. same as Shaft O.D., Both Ends Threaded with O.D. same as Shaft O.D., One End Tapered and One End Tapped, One End Tapered and One End Threaded

Alteration Code

Alteration Details

Fixed Dimension

Applicable Conditions

Ordering Example

LKC

Change L tolerance to a higher precision level

Shafts - Surface Treatment Fully Plated Related Image 5_Alterations Details

·L < 200→L±0.03
·200 ≤ L < 500→L±0.05
·L ≥ 500→L±0.1

[ ! ]L Dimension can be specified in 0.1 mm increments

[NG] Not applicable when D - P ≤ 2 with One End Threaded
[NG] Not applicable to Shafts with O.D. same as Shaft O.D.

PSFCN30-250.5-F40-B30-P10-LKC

Wrench Flat at One Location

Shafts - Surface Treatment Fully Plated Related Image 6_Alterations Details

D	W	ℓ1	D	W	ℓ1
8	7	8	25	22	10
10	8	8	30	27	15
12	10	10	35	30	15
15	13		40	36	20
20	17		50	41	20

[ ! ]SC = 1 mm Increments
[ ! ]SC+ℓ1 ≤ L
[ ! ]SC ≥ 0

PSFCN30-250-F40-B30-P10-SC5

Set Screw Flat at One Location

Shafts - Surface Treatment Fully Plated Related Image 7_Alterations Details

D	h
8 to 15	1
20 to 40	2
50	3

[ ! ]FC, E = 1 mm Increments
[ ! ]FC ≤ D × 3,
[ ! ] When 1.5 × D < FC, FC ≤ L/2
[ ! ]E = 0 or E ≥ 2

[NG] Not applicable to Tapered Shafts

PSFCN30-250-F40-B30-P10-FC10-E8

MSC

Change Tapped Thread to Fine Thread

Shafts - Surface Treatment Fully Plated Related Image 8_Alterations Details

D·P	MSC·NSC
12	8
15	8	10
20	8	10	12	14
25 to 35	8	10	12	14	18
40		10	12	14	18
50			12	14	18
Pitch	1.0	1.25	1.5

[ ! ] Applicable to One End Tapped, One End Stepped and Tapped
[ ! ] Specify One End Tapped and One End Stepped and Tapped based on the D dimension and P dimension respectively.

PSFCT20-350-MSC12

PC
QC

Undercut

Shafts - Surface Treatment Fully Plated Related Image 9_Alterations Details

·Coarse Threads

·Combined with Fine Thread Alterations

P Q	PC QC
6	4.4
8	6.0
10	7.7
12	9.4
16	13.0
20	16.4
24	19.6
30	25.0

PMC QMC	PC QC
6	4.8
8	6.4
10	8.4
12	10.4
15	13.4
17	15.4
20	18.4
25	22.7
30	22.7

PMC QMC	PC QC
10	8
12	9.7
14	11.7
18	15.7

[!] Undercut Width = F (T) - B (S)
[ ! ] Applicable to One End / Both Ends (PSFCN, PSFCM) Threaded Type only

[NG] Not applicable to M3 to M5

SFAM30-300-F40-B30-P20-T50-S40-Q16-PC-QC

PMC
PMS
QMC
QMS

Change Thread to Fine Thread

Shafts - Surface Treatment Fully Plated Related Image 10_Alterations Details

D	PMC·QMC												PMS·QMS
8	3	4	5	6
10		4	5	6	8
12			5	6	8	10							10
15			5	6	8	10	12						10	12
20				6	8	10	12	15	17				10	12	14	18
25					8	10	12	15	17	20			10	12	14	18
30					8	10	12	15	17	20	25		10	12	14	18
35						10	12	15	17	20	25	30	10	12	14	18
40							12	15	17	20	25	30		12	14	18
50								15	17	20	25	30			14	18
Pitch	0.35	0.5		0.75	1.0						1.5		1.25	1.5

[ ! ]Applicable to One End Threaded Type only

[Bearing Nut Fine Thread Alteration]
Specify "PMC" for the left end, and "QMC" for the right end

[Cylinder Fine Thread Alteration]
Specify "PMS" for the left end, and "QMS" for the right end

PSFCN20-300-F30-B20-PMC15

Circularity (M), Straightness (K), L Dimension Tolerance, Perpendicularity

Shafts - Surface Treatment Fully Plated Related Image 1_Circularity

■Straightness Measurement Method

Shafts - Surface Treatment Fully Plated Related Image 2_Circularity

Shaft ends are supported on V-blocks and turned 360 degrees to measure shaft runout using a dial indicator.
1/2 of measured runout is defined as the straightness.

■Circularity M
Shaft Outer Dia. g6 (Hardening)

D		Circularity M
Over	or Less	Circularity M
7	13	0.004
13	20	0.005
20	40	0.006
40	50	0.007

Unit: mm

■Straightness K
Shaft Outer Dia. g6 (Hardening)

D	L		Straightness K
8 to 50	L ≤ 100		0.01 or Less
8 to 50	L > 100		(L/100) × 0.01 or Less

Unit: mm

■L Dimension Tolerance
Shaft Outer Dia. g6 (Hardening)

L		L Dimension Tolerance
Over	or Less	L Dimension Tolerance
24	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8

Unit: mm

■ Concentricity and Perpendicularity

Shafts - Surface Treatment Fully Plated Related Image 3_Concentricity and Perpendicularity

Notes on Hardening and Surface Treating

■Reduced Hardness around Machined Areas

·Although processing is performed after the base material is hardened, annealing may lower hardness of the machined area.
* Reduced Hardness: Approximately 10 to 40 HRC

■Reduced Hardness Range

·Approximately 10 mm from the machined area

(Example)

Shafts - Surface Treatment Fully Plated Related Image 1_Reduced Hardness Range

■Machining area where hardness has lowered due to annealing

·Threaded, Stepped, Tapered, Wrench Flats, Keyway, Set Screw Flat

■Reduced Hardness Condition of Tapped

The conditions for lower hardness for tapped differ depending on the material and selection conditions.

EN 1.4125 Equiv. or 13Cr Stainless Steel: The hardness of the tapped part will decrease.
EN 1.3505 Equiv.: Under the following conditions, the hardness of the tapped will decrease.
·When M ≥ D/2, · RC thread, · One End Two Tapped Holes

■Effective Hardened Layer Depth of Hardening

The effective hardened layer depth varies depending on the external dimensions and materials.

O.D. D	Effective Hardened Layer Depth
O.D. D	EN 1.3505 Equiv.
8·10	0.5 or More
12	0.7 or More
15·20	0.7 or More
25 to 50	1.0 or More

■About hard chrome plating and plating layer of processed part

Hard chrome plating is applied after surface treatment of the base material, so there is no plating on the processed parts.
In the example below, only "///" area is treated with hard chrome plating.

Ex. Plating Remains: Stepped, Threaded Shaft, Set Screw Flat

/// Part: Plating Remains

Shafts - Surface Treatment Fully Plated Related Image 1_Plating Layer

Difference Between Shaft and Rotary Shaft

■ Basic Specifications

Specifications	Shafts		Rotary Shaft
Material	EN 1.3505 Equiv. EN 1.4125 Equiv. or 13Cr Stainless Steel	EN 1.1191 Equiv. EN 1.4301 Equiv.	EN 1.1191 Equiv. EN 1.4301 Equiv.	EN 1.7220 Equiv.
Hardening	Induction Hardened	—	—	Hardness: 30 to 35 HRC
O.D. Tolerance	g6/h5	f8	g6/h9/h7	g6
Surface Treatment	No Plating Hard Chrome Plating Low Temperature Black Chrome Plating Electroless Nickel Plating (Surface Treatment Fully Plated Type)	Hard Chrome Plating	No Plating Black Oxide Electroless Nickel Plating	Black Oxide Electroless Nickel Plating

* Hard chrome plating leaves no plating layer on the machined part.

■ Alteration

Alterations	Shafts	Rotary Shaft
L Dimension Tolerance	L < 200⇒L±0.03 200 ≤ L < 500⇒L±0.05 L ≥ 500⇒L±0.1	L < 500⇒L±0.05 L ≥ 500⇒L±0.1 Not applicable when L ≥ 800
Wrench Flats	Can be specified up to 2 Locations	Can be specified up to 1 Location
Set Screw Flat	Can be specified up to 2 Locations	Can be specified up to 3 Locations
2 Set Screw Flats	Can be specified up to 2 Locations Angle Specified: Fixed	Can be specified up to 1 Location Angle Specified: Configurable in 15 degree Increments
V Groove	Can be specified up to 2 Locations	—
Keyway	Can be specified up to 2 Locations Processing of Stepped Part: Not Possible	Can be specified up to 4 Locations Processing of Stepped Part: Possible
Undercut	M6 to M30	M3 to M30
Tapped Depth	Possible	Possible
Retaining Ring Groove	Can be specified 2 Locations (It will be a retaining ring type instead of alterations)	2 locations on D part, 1 location each on stepped part can be combined
Slit Cam Groove	—	Can be specified up to 1 Location
Concentricity	—	Possible
Left-hand Thread / Thread	—	Possible
Slit Added	—	Can be specified up to 1 Location
C Chamfering Width	—	Possible

Surface Limits / Hardness - Linear Shafts

Limits of hardness and hardening depth

The linear shafts are processed after the base material has undergone inductive hardening. Therefore, the processed surfaces may result in a deviating hardness.
In the following example, you can view the affected areas of the linear shaft, which may be affected after processing by e.g. threads, level surfaces, key surfaces and transverse bores.

Limitation of linear shaft induction hardening

Cause for deviating hardness

The raw material of the linear shaft is treated via thermal induction before grinding. Thus, a configured linear shaft can be custom-made not only cost-effectively, but also with short delivery times. The linear shaft is hardened at the boundary layer (boundary layer hardening) of the liner shaft. The depth of the hardened boundary layer depends on the material used and the diameter of the linear shaft. The following table shows the hardening depth of linear shafts.
Coatings and plating are applied to the raw material after hardening and grinding. For more information, see Coatings of the Linear Shaft.

Boundary layer hardening of a linear shaft

Figure of boundary layer hardening: hardened boundary layer in light gray

Effective hardening depth of linear shafts

Outside diameter (D)	Effective hardening depth
	EN 1.1191 equiv.	EN 1.3505 equiv.	EN 1.4125 equiv.	EN 1.4301 equiv.
3	-	+0.5	+0.5	Without induction hardening
4	-
5	-
6 - 10	+0.3
12 - 13	+0.5	+0.7	+0.5
15 - 20			+0.7
25 - 50	+0.8	+1

Overview of the effective hardening depth as PDF

Coatings of the linear shaft

The surface coating is applied to the raw material before machining the linear shaft. Thanks to their coating, the usable surface or work surface of the linear shaft is not only protected against corrosion but also against wear.
Machined positions of the linear shafts, such as plane surfaces or threads, may be uncoated, as they are added afterwards. This can lead to the machined surfaces being corroded in a linear shaft made of steel. If the linear shaft is used in a corrosive environment, it is recommended to use a stainless steel linear shaft.
The following figure shows the areas of the linear shaft that are coated (crosshatched).

Surface coating after processing the linear shaft

Figure: Coating of linear shafts

You can find further information on surface treatment and hardness in this PDF .

General Information - Linear Shafts

Linear Shaft Selection Details

- Material: steel, stainless steel

- Coating/plating: uncoated, hard chrome plated, LTBC coated, chemically nickel-plated

- Heat treatment: untreated, inductively hardened

- ISO tolerances: h5, k5, g6, h6, h7, f8

- Precision classes: perpendicularity 0.03, concentricity (with thread and increments) Ø0.02, perpendicularity 0.20, concentricity (thread and stepper) Ø0.10

- Linearity/roundness: depends on diameter, here for the PDF

Description / basics of the linear shaft

Linear shafts are steel shafts that perform guiding tasks in combination with linear bearings, such as plain bearing bushings or linear ball bushings. Linear shaft holding functions can be adopted from shaft holders or linear ball bearing adapters. Most linear shafts are heat-treated (induction hardened) solid shafts. A special design of linear shafts is the hollow shaft, which is also called tubular shaft. Inductively hardened linear shafts have a high surface hardness and a tough core. The achievable surface hardness is approx. 55-58 HRC (see information on hardening depth). Linear shafts made of stainless steels can generally not be hardened. Therefore, these steel shafts should be chrome plated to protect them from wear.

Materials

Linear shafts are mainly hardened steel shafts. In addition to the selected heat treatment, the steel used in particular imparts its properties to the linear shaft, although it is a hollow shaft or a solid shaft. Therefore, special aspects such as hardness, corrosion and wear must be considered when selecting the shaft steel.

Coatings

To protect linear shafts from corrosion, the surface can be chemically nickel-plated. As an alternative to chemical nickel-plating, steel shafts can also be coated with LTBC. The LTBC coating is an anti-corrosive surface coating and it is a low-reflection coating, made of a 5 μm thick film of fluoropolymer, which in essence is a black film. In addition, the LTBC coating is resistant to bursting pressure by extreme or repeated bending. LTBC-coated linear shafts are thus particularly suitable for locations where corrosion or light reflections are undesirable. Linear shafts that require particularly high surface hardness and wear resistance can be hard chrome plated.

Function

The form and function of linear shafts differ from linear guiderails. Linear guiderails are square rails that work in combination with carriers (rotary elements, carriages) according to the rolling or sliding principle. Linear shafts on the other hand are precision-ground round steel shafts that take on a linear guide function in conjunction with linear ball bushings or plain bearing bushings (maintenance-free bushings).

Areas of Application

Linear shafts are intended for axial motion. Whether horizontal or vertical linear motion, all linear motions can be implemented with linear shafts. Common applications are stroke mechanisms and other applications with high demands on smoothness, precision and service life. Linear shafts can therefore be used in almost all industries of plant construction and mechanical engineering. Linear shafts are often found in 3D printers, metering equipment, measuring devices, positioning devices, alignment devices, bending devices and sorting equipment.

Instructions for Use / Installation - Linear Shafts

For product selection, please observe the linear shaft tolerances (e.g. h5, k5, g6, h6, h7, f8) in conjunction with the diameter tolerance of the plain bearing bushing (sliding bearing) after pressing in or the running circle diameter of the linear ball bearing (ball bushing).

Diameter change of linear ball bushings after pressing

Inner diameter of linear ball bushings or ball bushings

Shaft Fasteners

Application Example of a Linear Shaft - Linear Shafts with Linear Ball Bushings - Linear Shafts with Shaft Holder

Application Example of a Linear Shaft Application Example - Linear Shaft with Linear Ball Bearings - Linear Ball Bearings with an Adjusting Ring

Application Example of a Linear Shaft - Linear Shaft with Shaft Holder

Application Example of a Linear Shaft - Linear Shaft with Circlip Groove - Linear Shaft with Circlip

Application Example of a Linear Shaft - Linear Shaft with Holding Washer

Application Example of a Linear Shaft - Linear Thread - Outer Threaded Linear Shaft - Linear Threaded with inner and outer threads

Application Example of a Linear Shaft - Cross Bore Linear Shaft - Inner Thread Linear Shaft

Application Example of a Linear Shaft - Cross Bore Linear Shaft - Outer Thread Linear Shaft

Supplementary Article

Shaft holder

Adjusting rings/clamping rings

Product range of adjusting rings - product range of clamping rings

Linear ball bearing

Plain bearing bushings

Product range of sliding bearing bushings - plain bearing with housing

Ball guides

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Part Number
PSFCN25-[25-1000/1]-F[2-120/1]-B[2-118/1]-PMC[8,10,12,15,17,20]
PSFCN25-[25-1000/1]-F[2-120/1]-B[2-118/1]-PMS[10,12,14,18]
PSFCN30-[25-998/1]-F[2-120/1]-B[2-118/1]-P[8,10,12,16,20,24]
PSFCN30-[25-998/1]-F[2-120/1]-B[2-118/1]-PMC[8,10,12,15,17,20,25]
PSFCN30-[25-998/1]-F[2-120/1]-B[2-118/1]-PMS[10,12,14,18]
PSFCN35-[25-1000/1]-F[2-150/1]-B[2-148/1]-P[10,12,16,20,24,30]
PSFCN35-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMC[10,12,15,17,20,25,30]
PSFCN35-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMS[10,12,14,18]
PSFCN40-[25-1000/1]-F[2-150/1]-B[2-148/1]-P[12,16,20,24,30]
PSFCN40-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMC[12,15,17,20,25,30]
PSFCN40-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMS[12,14,18]
PSFCN50-[25-1000/1]-F[2-150/1]-B[2-148/1]-P[16,20,24,30]
PSFCN50-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMC[15,17,20,25,30]
PSFCN50-[25-1000/1]-F[2-150/1]-B[2-148/1]-PMS[14,18]
PSFCT8-[20-800/1]-M[3,4,5]
PSFCT10-[20-800/1]-M[3,4,5,6]
PSFCT12-[20-1000/1]-M[4,5,6,8]
PSFCT12-[20-1000/1]-MSC8
PSFCT15-[25-1000/1]-M[4,5,6,8,10]
PSFCT15-[25-1000/1]-MSC[8,10]
PSFCT20-[30-1000/1]-M[4,5,6,8,10,12]
PSFCT20-[30-1000/1]-MSC[8,10,12,14]
PSFCT25-[35-1000/1]-M[4,5,6,8,10,12,16]
PSFCT25-[35-1000/1]-MSC[8,10,12,14,18]
PSFCT30-[35-1000/1]-M[6,8,10,12,16,20]
PSFCT30-[35-1000/1]-MSC[8,10,12,14,18]
PSFCT35-[35-1000/1]-M[8,10,12,16,20,24]
PSFCT35-[35-1000/1]-MSC[8,10,12,14,18]
PSFCT40-[50-1000/1]-M[10,12,16,20,24,30]
PSFCT40-[50-1000/1]-MSC[10,12,14,18]
PSFCT50-[65-1000/1]-M[12,16,20,24,30]
PSFCT50-[65-1000/1]-MSC[12,14,18]

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Shaft end Shape (Left)	Shaft end Shape (Right)	[D] Diameter (Shaft) (mm)	[L] Length (Shaft) (mm)	End Section Type	[B] Length (thread) (mm)	[MSC] Size (fine thread - depth 2xMSC) (mm)	Threaded (Coarse) [Q] (mm)	[F] Length (stud - offset - front side) (mm)	[PMC] Size (fine thread) (mm)	Change to Fine Thread [QMC] (mm)	[PMS] Size (fine thread) (mm)	Change to Fine Thread [QMS] (mm)	[M] Size (thread - depth 2xM) (mm)	[P] Diameter (stepped - front side) (mm)	Tapped (Coarse) [N] (mm)	Change Tapped Thread N to Fine Thread [NSC] (mm)	J (mm)	S (mm)	T (mm)
-	1	9 Days	10	External thread	Straight	25	25 ～ 1000	One End Threaded	2 ～ 118	-	-	2 ～ 120	8 ～ 20	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	25	25 ～ 1000	One End Threaded	2 ～ 118	-	-	2 ～ 120	-	-	10 ～ 18	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	30	25 ～ 998	One End Threaded	2 ～ 118	-	-	2 ～ 120	-	-	-	-	-	8 ～ 24	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	30	25 ～ 998	One End Threaded	2 ～ 118	-	-	2 ～ 120	8 ～ 25	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	30	25 ～ 998	One End Threaded	2 ～ 118	-	-	2 ～ 120	-	-	10 ～ 18	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	35	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	-	-	-	10 ～ 30	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	35	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	10 ～ 30	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	35	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	10 ～ 18	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	40	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	-	-	-	12 ～ 30	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	40	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	12 ～ 30	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	40	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	12 ～ 18	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	50	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	-	-	-	16 ～ 30	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	50	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	15 ～ 30	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	External thread	Straight	50	25 ～ 1000	One End Threaded	2 ～ 148	-	-	2 ～ 150	-	-	14 ～ 18	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	8	20 ～ 800	One End Tapped	-	-	-	-	-	-	-	-	3 ～ 5	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	10	20 ～ 800	One End Tapped	-	-	-	-	-	-	-	-	3 ～ 6	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	12	20 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	4 ～ 8	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	12	20 ～ 1000	One End Tapped	-	8	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	15	25 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	4 ～ 10	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	15	25 ～ 1000	One End Tapped	-	8 ～ 10	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	20	30 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	4 ～ 12	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	20	30 ～ 1000	One End Tapped	-	8 ～ 14	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	25	35 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	4 ～ 16	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	25	35 ～ 1000	One End Tapped	-	8 ～ 18	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	30	35 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	6 ～ 20	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	30	35 ～ 1000	One End Tapped	-	8 ～ 18	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	35	35 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	8 ～ 24	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	35	35 ～ 1000	One End Tapped	-	8 ～ 18	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	40	50 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	10 ～ 30	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	40	50 ～ 1000	One End Tapped	-	10 ～ 18	-	-	-	-	-	-	-	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	50	65 ～ 1000	One End Tapped	-	-	-	-	-	-	-	-	12 ～ 30	-	-	-	-	-	-
-	1	9 Days	10	Internal thread	Straight	50	65 ～ 1000	One End Tapped	-	12 ～ 18	-	-	-	-	-	-	-	-	-	-	-	-	-

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Basic information

RoHS Information	RoHS requirements fulfilled	Basic Shape	Solid	Features, Areas of application	Not applicable
Shaft end Perpendicularity	0.2	Material	EN 1.3505 Equiv.	Heat Treatment	Induction Hardened
Surface Treatment	Electroless Nickel Plating	ISO Tolerance	g6	Hardness	Induction Hardened (58HRC or more)

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Basic Attributes

Shaft end Shape (Left)
- Straight
- Internal thread
- External thread
Clear
[D] Diameter (Shaft)(mm)
8

10

12

15

20

25

30

35

40

50
Clear
[L] Length (Shaft)(mm)
[20-1000/1mm Unit(s)]
Clear
End Section Type
- Both Ends Tapped
- Both Ends Threaded
- Both Ends Threaded with O.D. Same as Shaft O.D.
- One End Stepped and Tapped Shafts
- One End Stepped, Both Ends Tapped
- One End Tapered, One End Tapped
- One End Tapered, One End Threaded
- One End Tapped
- One End Threaded
- One End Threaded Shafts with O.D. same as Shaft O.D.
- Straight
Clear
[B] Length (thread)(mm)
[2-150/1mm Unit(s)]
Clear
[MSC] Size (fine thread - depth 2xMSC)(mm)
4

5

6

8

10

12

14

18
Clear
Threaded (Coarse) [Q](mm)
3

4

5

6

8

10

12

16

20

24

30
Clear
[F] Length (stud - offset - front side)(mm)
[2-188/1mm Unit(s)]
Clear
[PMC] Size (fine thread)(mm)
3

4

5

6

8

10

12

15

17

20

25

30
Clear
Change to Fine Thread [QMC](mm)
3

4

5

6

8

10

12

15

17

20

25

30
Clear
[PMS] Size (fine thread)(mm)
10

12

14

18
Clear
Change to Fine Thread [QMS](mm)
10

12

14

18
Clear
[M] Size (thread - depth 2xM)(mm)
3

4

5

6

8

10

12

16

20

24

30
Clear
[P] Diameter (stepped - front side)(mm)
3

4

5

6

8

10

12

16

20

24

30
[6-47/1mm Unit(s)]
Clear
Tapped (Coarse) [N](mm)
3

4

5

6

8

10

12

16

20

24

30
Clear
Change Tapped Thread N to Fine Thread [NSC](mm)
8

10

12

14

18
Clear
J(mm)
Clear
S(mm)
[7-150/1mm Unit(s)]
Clear
T(mm)
Clear
Type
- PSFCA
- PSFCG
- PSFCJ
- PSFCL
- PSFCM
- PSFCN
- PSFCQ
- PSFCT
- PSFCW
- PSFTCA
- PSFTCB
Clear
Shaft end Shape (Right)
- Straight
- Internal thread
- External thread
- Taper
Clear
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9 Days or Less
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
What is the difference between a hollow shaft and a solid shaft?: Answer:
With the same size, there are three differences between a hollow shaft and a solid shaft. Hollow shafts weigh less. The inner cavity of a hollow shaft is suitable for use as a channel (cable channel). Solid shafts are a bit more rigid (higher resistance torque).
Question:
What is the minimum order of linear shafts from MISUMI?: Answer:
MISUMI supplies solid shafts, hollow shafts and precision shafts starting at a lot size of 1. This also applies to all other items in our product range.
Question:
Noises and vibrations occur with a linear shaft. In addition, there are jerky movements. What could cause this?: Answer:
In general, it may be caused if the steel shaft is not properly lubricated. In addition, an incorrectly selected diameter tolerance of the linear shafts may also make the cycle of motion more difficult. When using MISUMI linear ball bearings, a g6 shaft tolerance is recommended (tolerance recommendations may vary depending on the manufacturer).
Question:
What is the strength of a solid shaft?: Answer:
The strength of a linear shaft, although it is a solid shaft, hollow shaft or precision shaft, should always be selected in consideration of the strength of the material used.
Question:
What are the advantages of a hollow shaft over a solid shaft?: Answer:
There are various advantages of a hollow shaft compared to a solid shaft. If the outer diameter is the same, the weight of a hollow shaft is lower than that of a solid shaft. However, the cavity of the hollow shaft can also be used as a cable channel or for cooling. A hollow shaft is at the same weight or with the same cross-sectional area more rigid than a solid shaft, because the outer diameter is larger. However, the question that needs to be answered is whether the advantage is a greater room utilization or less weight.
Question:
Is a hollow shaft stiffer than a solid shaft?: Answer:
The rigidity of a hollow shaft is slightly lower with the same outer diameter than that of a solid shaft. However, with the same cross-sectional area or with the same weight, the stiffness of a hollow shaft is higher than that of a solid shaft, because the outer diameter of the hollow shaft is larger.
Question:
Why do I have running grooves on the linear shafts of my 3D printers?: Answer:
The running grooves on the linear shaft may have been created, for example, by using a linear ball bearing. To prevent grooves from forming on a steel shaft, it should be hardened and hard chromium plated, making it more durable and resistant to the wear and tear from ball bearings.
Question:
How do the flexure properties of hollow shafts and solid shafts differ?: Answer:
With an equally large outer diameter, a solid shaft has better flexure properties than an equally large hollow shaft. However, the solid shaft is not much stiffer than a hollow shaft with the same outer diameter, since the outer sections mainly carry the load. Hollow shafts with the same cross-sectional area are more rigid than solid shafts, because they have a larger outer diameter. Therefore, there is physically more material in the outer sections for the bending, which bears the loads.
Question:
I need a lacquered or matted shaft because reflections cause problems with the optics. Does MISUMI have something like that?: Answer:
MISUMI LTBC-coated linear shafts are an alternative to painted or matted steel shafts. The LTBC coating is low-reflection and has the same effect as painted and matte shafts. In addition, LTBC-coated linear shafts are more resistant to wear and tear and flaking. You can find further information on LTBC coating here .
Question:
It has been shown that a hollow shaft is stronger than a solid shaft made of the same material. Why?: Answer:
A hollow shaft with the same outer dimensions is principally not stronger than a solid shaft. However, a hollow shaft per weight unit is stronger.