Configure

Screw Turn Direction
Left-hand Thread
Material
- EN 1.1191 Equiv.
Surface Treatment
- Black Oxide
Thread Nominal D(φ)
- 12
- 14
- 16
- 18
- 20
- 22
- 25
Pitch(mm)
- 2
- 3
- 4
- 5
Shaft Overall Length L(mm)
[80-1200/1mm units]
S(mm)
[2-100/1mm units]
Type
- MTWBLK
CAD
- 2D
- 3D
Est. shipping days
- All
- Within 7 working days

Lead Screws For Support Units DIN 103

CatalogP.1-789

Part number:

Still undefined. 7 possible part numbers found.

Outline drawing and specifications table
Part number list
More Information
Catalog

Outline drawing and specifications table

Dimensional Drawing

Right-Hand Screw / Left-Hand Screw *For D = 20, 22, 25

Standard Chevron Dimensions

H = 1.866P, H₁ = 0.5P, d₂ = d - 0.5P
d₁ = d-P, D = d, D₂ = d₂, D₁ = d₁
Thread d: O.D. d₁: Root Dia. d₂: Effective Dia.
Tapped D: Root Dia. D₁: I.D. D₂: Effective Dia.
P: Pitch H₁: Engage Height

R	e Tolerance		m + 0.14 0
8	5	+0.075 0	0.7
10	9.6	0 －0.09	1.15
12	11.5	0 －0.11
15	14.3	0 －0.11

Type		[M] Material	[S] Surface Treatment
Right-Hand Screw	Left-Hand Screw	[M] Material	[S] Surface Treatment
MTWK	MTWLK	EN 1.1191 Equiv.	—
MTWBK	MTWBLK		Black Oxide
RMTWK	RMTWLK		Low Temperature Black Chrome Plating
MTSWK	MTSWLK	EN 1.4305 Equiv.	—

·Retaining ring is not included.
·No hardening treatment is applied.

Lead Screw Accuracy

Item	Content
Standard Chevron	Tr Standard (Old TM Standard)
Tolerance and Allowable Dimension	JIS B 0217-1,2
Screw Accuracy (Threaded)	7e
Nut Accuracy (Tapped)	7H
Single Pitch Error	±0.02
Accumulated Pitch Error	±0.15/300 mm

The Tr standard has the same standard dimensions as the old JIS TM standard (abolished).
Dimensional tolerances are regulated for Tr standard.
Refer to the table below for Lead Screw Specifications.

h7 Tolerance (V,Q)

Over	or Less	Tolerance
3	6	0 －0.012
6	10	0 －0.015
10	18	0 －0.018
18	30	0 －0.021
30	50	0 －0.025

Compliant with JIS B 0401

Unspecified Dimensional Tolerances

Over	or Less	Tolerance
0.5	3	±0.1
3	6	±0.1
6	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8
1000	2000	±1.2

Compliant with JIS B 0405 Class m (Middle Class)

Specification Table

Part Number	—	L	—	S
MTWK20	—	800	—	S90

Part Number		1 mm Increments		F	R	B	T	Q	A	M × Pitch (Fine)	E	D	Pitch P	[Reference] Lead Screw Areas Minimum Length
Type	D	L	S	F	R	B	T	Q	A	M × Pitch (Fine)	E	D	Pitch P	[Reference] Lead Screw Areas Minimum Length
Right-Hand Screw / Left-Hand Screw MTWK MTWLK MTWBK MTWBLK RMTWK RMTWLK MTSWK MTSWLK	12	80 to 1000	2 ≤ S ≤ 80	10	8	7	26	8	11	8 × 1.0	6	12	2	22
	14	80 to 1000	2 ≤ S ≤ 80	12	10	8	29	10	12	10 × 1.0	8	14	3	22
	16	100 to 1200	2 ≤ S ≤ 95	12	12	8	29	12	12	12 × 1.0	10	16	(3)	26
	18	150 to 1200	2 ≤ S ≤ 95	12	12	8	29	12	12	12 × 1.0	10	18	4	31
	20		2 ≤ S ≤ 100	12	15	9	34	15	14	15 × 1.0	12	20	4	31
[ ! ] D dimension 22 is not available for MTSWK. [ ! ] D dimensions 22 and 25 are not available for MTSWLK.	22			12	15	9	34	15	14	15 × 1.0	12	22	5	40
	25			12	15	9	34	15	14	15 × 1.0	12	25	(5)	40

[ ! ] Please select L and S dimensions so that the length of the lead screw area is equal to or greater than the "minimum length of the lead screw area" in the table.
[ ! ] This product is a single thread screw and therefore the pitch P = lead.
[ ! ] Sizes in ( ) are outside the Tr standard, but the machining accuracy of all sizes conforms to the Tr standard.
[!] M Thread Tolerance Zone Class: 6 g

[!] Recommended Grease: Lithium soap-based grease No. 2 (Please wipe off the antirust oil before applying.)

Lead Screw SpecificationsUnit: mm

Shaft Dia.	Pitch	Thread Shaft Effective Dia.	Screw Shaft Minor Dia. (MIN)	Thread Shaft Lead Angle	Screw Shaft Runout (Max.)
					Shaft Overall Length
					Up to 125	126 Up to 200	201 Up to 315	316 Up to 400	401 Up to 500	501 Up to 630	631 Up to 800	801 Up to 1000	1001 Up to 1250	1251 Up to 1600	1601 Up to 2000
8	1.5	7.25	(5.9)	3° 46′	0.1	0.14	0.21	0.27	0.35	-	-	-	-	-	-
10	2	9	(7.2)	4° 03′	0.09	0.12	0.16	0.21	0.27	0.35	0.46	0.58
12	2	11	(9.2)	3° 19′
14	3	12.5	(10.1)	4° 22′	0.09	0.11	0.13	0.16	0.2	0.25	0.32	0.42	-	-	-
16	2	15	(13.18)	2° 25′									0.55	0.73	1
	3	14.5	(12.1)	3° 46′
18	4	16	(13.1)	4° 33′	-
20	2	19	(17.18)	1° 55′
	4	18	(15.1)	4° 03′
22	5	19.5	(16.1)	4° 40′	-	0.09	0.11	0.13	0.16	0.19	0.23	0.3	0.38	0.5	0.69
25	5	22.5	(19)	4° 03′
28	5	25.5	(22)	3° 34′
32	6	29	(24.5)	3° 46′
36	6	33	(28.5)	3° 19′	-	0.11	0.11	0.11	0.13	0.15	0.17	0.22	0.27	0.34	0.46
40	6	37	(32.5)	2° 57′
50	8	46	(40.4)	3° 10′

● Runout Measurement Method

Alterations

Part Number	—	L	—	S	—	(NAR·RC·FE·SE·ME·MR·ZE·KE)
MTWK20	—	800	—	S90	—	KE0	—	C30

Alterations

No Retaining Ring Groove on Support Side Shaft End

No Machining on Support Side

Flat Machining

Wrench Flats

Coarse Tapping

Square Chamfering

Keyway

Lead Screws - For Support Units: Related Image

Code

NAR (R Part)

RC (R Part)

FE (E Part)

SE (E Part)

MR (Left Side), ME (E Part)

ZE (E Part)

KE (E Part)

Spec.

No
retaining ring machining
performed on the R part for the support side end.

Ordering Code NAR

No machining performed on the R part.

Ordering Code RC

[NG] Combination with other R part alteration is not available.

FE, FW, FY =
0.5 mm Increments
FE = Applied on E part

Ordering Code
FE5−FW10−FY1

[ ! ]FY ≤ 1.0
[ ! ] FE = 0, or FE ≥ 2
[ ! ]3 ≤ FW ≤ 20

SE, SW, SY =
1 mm Increments
SE = Applied on E part

Ordering Code
SE3−SW10−SY7

[ ! ]SW ≥ E−2
[ ! ]3 ≤ SY ≤ 20
[ ! ] SE = 0, or FE ≥ 2

ME = Applied on E part
MR = Applied on R part and left end face
Ordering Code ME6

E·R·D	ME·MR (Selection Range)
6	3
8	3·4
10	3·4·5
12	3·4·5·6
14·15	3·4·5·6·8
16·18	5·6·8·10
20 to 25	5·6·8·10·12

[NG]When combining with an other alteration, do not specify this alteration in such a way that the shaft end thickness becomes less than 1 mm.

A = 1 mm Increments
ZE = Applied on E part
Ordering Code
ZE12−W10−A8

[ ! ] Can be combined with Tapped Hole machining only on the same shaft.
　
[ ! ]5 ≤ A ≤ 20
[ ! ] ZE = E Specified

ZE = E	W Selection
6	5
8	6
10	8
12	9·10

KE,C = 1 mm Increments

[ ! ]C ≤ 60 [ ! ]KE ≥ 2
[ ! ]S−C−KE ≥ 2

[ ! ] When KE = 0,
the keyway R will be eliminated on the shaft end side
.

KE = Applied on E part
Ordering Code KE8−C10

[ ! ] Applicable to D dimension 16 or more

　
When a new keyway is added, the O.D. tolerance for the E part is always 0 -0.05.

[ ! ] Specify the C dimension not to be below b1

Applicable Shaft End Dia. E	Keyway Dimension
	b₁		t₁		r₁
	Standard Dimension	Tolerance (N9)	Standard Dimension	Tolerance
10	3	−0.004 −0.029	1.8	+0.1 0	0.08 Up to 0.16
12	4	0 −0.030	2.5

[!] Key materials are not included.

[!]Specify an alteration position to be 2 mm or more away from the stepped part. (Refer to the diagram in Caution (1))
[!] When adding multiple alterations, there must be 2 mm or more clearance between each machined part. (Refer to the diagram in Caution (2))
[!]When flat machining, wrench flats, square chamfering and keyway alterations are combined with each other, their orientations will be random. (Refer to the diagram in Caution (3))
[!] Do not specify multiple alterations in such a way that they overlap with each other in the rotating direction on the same shaft. (Refer to the diagram in Caution (4))
[ ! ] When two or more alterations are specified on a shaft, they may not be machined due to correlation.

Caution (1)
Specify the alteration portion to be 2 mm or more away from the stepped part
.
Lead Screws - For Support Units: Related Image

Caution (2)
2 mm or more is required for the clearance between multiple alterations
.
Lead Screws - For Support Units: Related Image

Caution (3)
When the multiple alterations are combined with each other, their orientations are random and thus, are not always aligned in a linear arrangement. (One example of this is shown in the diagram below.)　
Lead Screws - For Support Units: Related Image

For Alterations A and B added to the same shaft, as shown in the diagram above, their orientations are random and thus, there are some cases where they are not aligned in a linear arrangement.

Caution (4)
Do not specify multiple alterations in such a way that they overlap with each other on the same shaft.
(Any diagram as shown below is not acceptable.)
Lead Screws - For Support Units: Related Image

Overlapped portion of Alterations A and B

Part number list

Number of items

Part number

MTWBLK12-[80-1000/1]-S[2-80/1]

MTWBLK14-[80-1000/1]-S[2-80/1]

MTWBLK16-[100-1200/1]-S[2-95/1]

MTWBLK18-[150-1200/1]-S[2-95/1]

MTWBLK20-[150-1200/1]-S[2-100/1]

MTWBLK22-[150-1200/1]-S[2-100/1]

MTWBLK25-[150-1200/1]-S[2-100/1]

Screw Turn Direction

Material

Surface Treatment

Thread Nominal D

(φ)

Pitch

(mm)

Shaft Overall Length L

(mm)

RoHS?

Minimum order quantity

Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	12	2	80 ～ 1000	2 ～ 80	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	14	3	80 ～ 1000	2 ～ 80	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	16	3	100 ～ 1200	2 ～ 95	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	18	4	150 ～ 1200	2 ～ 95	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	20	4	150 ～ 1200	2 ～ 100	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	22	5	150 ～ 1200	2 ～ 100	10	1 pieces
Left-hand Thread	EN 1.1191 Equiv.	Black Oxide	25	5	150 ～ 1200	2 ～ 100	10	1 pieces

Unit price (excluding VAT)(Unit price including VAT)	Standard shipping days

- ( - )	7 working days
- ( - )	7 working days
- ( - )	7 working days
- ( - )	7 working days
- ( - )	7 working days
- ( - )	7 working days
- ( - )	7 working days

Basic information

DIN 103

Caution

Please check the content on our website as the PDF does not contain the most up-to-date information.

Technical information

Outline and specifications

App. Example

■Slide Base Transfer Unit

■Recommended Configuration
This unit allows the slide base for workpiece/fixture loading to be position-adjusted
by manually rotating its lead screws. A dedicated lead screw, bearing unit and stopper clamp are combined
in a set.
The unit can support radial and axial loads, and can be constructed more economically in a compact manner
. Also, position indicators can be easily mounted.
■Combined Parts Details

MTUZ	Lead Screw Support Unit - Support Side
MTSFR	Lead Screw Nut - Flanged
DNBB	Nut Bracket for Lead Screw
MTWK	Lead Screw - For Support Units
MTWZ-S	Lead Screw Support Unit - Stop Plate Set
AHLN100	Five Spoked Handwheel 8 Holes + Tatsu
WSSB	Metal Washer

[!]For MTUZ, purchasing it in combination with MTWZ in set is more economical than when it is purchased as the separate unit.

* The following two types of alterations are combined on the lead screw shaft for fixing the handle.

Alteration Details	Symbol	Applications
Keyway	KE	Handle Rotation Stopper
Coarse Tapping	ME	Fixing the handle

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