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Linear shafts / double-sided external thread

Linear shafts / double-sided external thread

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  • Linear shafts / double-sided external thread
  • Linear shafts / double-sided external thread
View the FAQ (10)

MISUMI

MISUMI

  • Order quantities extended (D-JIT)

(i)Remark

  • SFAL has been localized according to European needs and requirements. Please have a look on the EU version SFALEU. SFALEU is available in EN 1.1213 (Cf53) and h6 / h7.

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Back to Linear Shaft Category

Technical Drawing - Linear Shafts

 

Both Ends Threaded/Thread Dia. Equal to Shaft Dia.:Related Image
Annealing may lower hardness at shaft end machined areas (effective thread length + approx. 10mm). >>P.112
L Dimension Tolerance, Circularity, Straightness, Perpendicularity, Concentricity and Changes in Hardness >>P.111
Features of LTBC Plating Here

 

Basic Properties (e.g. material, hardness, coating, tolerance) - Linear Shafts

 

TypeMaterialHardness
Surface Treatment
D Tol. g6D Tol. h5D Tol. f8
SFALSFUL-EN 1.3505 Equiv.Effective Hardened Depth of Induction Hardening >>P.112
EN 1.3505 Equiv. 58HRC~
EN 1.4037 Equiv. 56HRC~		-
SSFALSSFUL-EN 1.4037 Equiv.
PSFALPSFUL-EN 1.3505 Equiv.Hard Chrome Plating
Plating Hardness: HV750 ~
Plating Thickness: 5µ or More
PSSFALPSSFUL-EN 1.4037 Equiv.
RSFAL--EN 1.3505 Equiv.LTBC Plating
--PSFGLEN 1.1191 Equiv.-Hard Chrome Plating
Plating Hardness: HV750 ~
Plating Thickness: 10µ or More
--PSSFGLEN 1.4301 Equiv.

 

Further specifications can be found under the tab More Information.

 

Composition of a Product Code - Linear Shafts

 

Part Number-L-B-S
SFAL20-300-B20-S15

 

Alterations - Linear Shafts


Both Ends Threaded/Thread Dia. Equal to Shaft Dia.:Related Image

You find further options in detail under Option Overview.

 

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Part Number
PSFAL3-[25-194/1]-B[3-15/1]-S[3-15/1]
PSFAL4-[25-292/1]-B[4-20/1]-S[4-20/1]
PSFAL5-[25-392/1]-B[4-25/1]-S[4-25/1]
PSFAL6-[25-790/1]-B[5-30/1]-S[5-30/1]
PSFAL8-[25-986/1]-B[7-40/1]-S[7-40/1]
PSFAL10-[25-984/1]-B[8-50/1]-S[8-50/1]
PSFAL12-[25-1182/1]-B[9-60/1]-S[9-60/1]
PSFAL16-[25-1180/1]-B[10-80/1]-S[10-80/1]
PSFAL20-[25-1174/1]-B[13-100/1]-S[13-100/1]
PSFAL30-[25-1464/1]-B[18-150/1]-S[18-150/1]
PSFGL6-[25-596/1]-B[5-30/1]-S[5-30/1]
PSFGL8-[25-796/1]-B[7-40/1]-S[7-40/1]
PSFGL10-[25-796/1]-B[8-50/1]-S[8-50/1]
PSFGL12-[25-996/1]-B[9-60/1]-S[9-60/1]
PSFGL16-[25-1196/1]-B[10-80/1]-S[10-80/1]
PSFGL20-[25-1196/1]-B[13-100/1]-S[13-100/1]
PSFGL30-[25-1496/1]-B[18-150/1]-S[18-150/1]
PSFUL3-[25-194/1]-B[3-15/1]-S[3-15/1]
PSFUL4-[25-292/1]-B[4-20/1]-S[4-20/1]
PSFUL5-[25-392/1]-B[4-25/1]-S[4-25/1]
PSFUL6-[25-790/1]-B[5-30/1]-S[5-30/1]
PSFUL8-[25-986/1]-B[7-40/1]-S[7-40/1]
PSFUL10-[25-984/1]-B[8-50/1]-S[8-50/1]
PSFUL12-[25-1182/1]-B[9-60/1]-S[9-60/1]
PSFUL16-[25-1180/1]-B[10-80/1]-S[10-80/1]
PSFUL20-[25-1174/1]-B[13-100/1]-S[13-100/1]
PSFUL30-[25-1464/1]-B[18-150/1]-S[18-150/1]
PSSFAL3-[25-194/1]-B[3-15/1]-S[3-15/1]
PSSFAL4-[25-292/1]-B[4-20/1]-S[4-20/1]
PSSFAL5-[25-392/1]-B[4-25/1]-S[4-25/1]
PSSFAL6-[25-790/1]-B[5-30/1]-S[5-30/1]
PSSFAL8-[25-986/1]-B[7-40/1]-S[7-40/1]
PSSFAL10-[25-984/1]-B[8-50/1]-S[8-50/1]
PSSFAL12-[25-1182/1]-B[9-60/1]-S[9-60/1]
PSSFAL16-[25-1180/1]-B[10-80/1]-S[10-80/1]
PSSFAL20-[25-1174/1]-B[13-100/1]-S[13-100/1]
PSSFAL30-[25-1464/1]-B[18-150/1]-S[18-150/1]
PSSFGL6-[25-596/1]-B[5-30/1]-S[5-30/1]
PSSFGL8-[25-796/1]-B[7-40/1]-S[7-40/1]
PSSFGL10-[25-796/1]-B[8-50/1]-S[8-50/1]
PSSFGL12-[25-996/1]-B[9-60/1]-S[9-60/1]
PSSFGL16-[25-1196/1]-B[10-80/1]-S[10-80/1]
PSSFGL20-[25-1196/1]-B[13-100/1]-S[13-100/1]
PSSFGL30-[25-1496/1]-B[18-150/1]-S[18-150/1]
PSSFUL3-[25-194/1]-B[3-15/1]-S[3-15/1]
PSSFUL4-[25-292/1]-B[4-20/1]-S[4-20/1]
PSSFUL5-[25-392/1]-B[4-25/1]-S[4-25/1]
PSSFUL6-[25-890/1]-B[5-30/1]-S[5-30/1]
PSSFUL8-[25-1086/1]-B[7-40/1]-S[7-40/1]
PSSFUL10-[25-1184/1]-B[8-50/1]-S[8-50/1]
PSSFUL12-[25-1382/1]-B[9-60/1]-S[9-60/1]
PSSFUL16-[25-1380/1]-B[10-80/1]-S[10-80/1]
PSSFUL20-[25-1374/1]-B[13-100/1]-S[13-100/1]
PSSFUL30-[25-1464/1]-B[18-150/1]-S[18-150/1]
RSFAL3-[25-194/1]-B[3-15/1]-S[3-15/1]
RSFAL4-[25-292/1]-B[4-20/1]-S[4-20/1]
RSFAL5-[25-392/1]-B[4-25/1]-S[4-25/1]
RSFAL6-[25-500/1]-B[5-30/1]-S[5-30/1]
RSFAL8-[25-500/1]-B[7-40/1]-S[7-40/1]
RSFAL10-[25-500/1]-B[8-50/1]-S[8-50/1]
Part Number
Standard Unit Price
Minimum order quantityVolume Discount
Standard
Shipping Days
?
RoHS[D] Diameter (Shaft)
(mm) 		[L] Length (Shaft)
(mm) 		Material Heat Treatment Surface Treatment ISO Tolerance Hardness [B] Length (thread)
(mm) 		[S] Length (thread)
(mm)

-

1 10 Days 10325 ～ 194[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)3 ～ 153 ～ 15

-

1 10 Days 10425 ～ 292[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)4 ～ 204 ～ 20

-

1 10 Days 10525 ～ 392[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)4 ～ 254 ～ 25

-

1 4 Days 10625 ～ 790[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)5 ～ 305 ～ 30

-

1 4 Days 10825 ～ 986[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)7 ～ 407 ～ 40

-

1 4 Days 101025 ～ 984[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)8 ～ 508 ～ 50

-

1 4 Days 101225 ～ 1182[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)9 ～ 609 ～ 60

-

1 4 Days 101625 ～ 1180[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)10 ～ 8010 ～ 80

-

1 4 Days 102025 ～ 1174[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)13 ～ 10013 ～ 100

-

1 4 Days 103025 ～ 1464[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (58HRC~)18 ～ 15018 ～ 150

-

1 6 Days 10625 ～ 596[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening5 ～ 305 ～ 30

-

1 6 Days 10825 ～ 796[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening7 ～ 407 ～ 40

-

1 6 Days 101025 ～ 796[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening8 ～ 508 ～ 50

-

1 6 Days 101225 ～ 996[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening9 ～ 609 ～ 60

-

1 6 Days 101625 ～ 1196[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening10 ～ 8010 ～ 80

-

1 6 Days 102025 ～ 1196[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening13 ～ 10013 ～ 100

-

1 6 Days 103025 ～ 1496[Unalloyed Steel] EN 1.1191 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening18 ～ 15018 ～ 150

-

1 7 Days 10325 ～ 194[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)3 ～ 153 ～ 15

-

1 7 Days 10425 ～ 292[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)4 ～ 204 ～ 20

-

1 7 Days 10525 ～ 392[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)4 ～ 254 ～ 25

-

1 4 Days 10625 ～ 790[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)5 ～ 305 ～ 30

-

1 4 Days 10825 ～ 986[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)7 ～ 407 ～ 40

-

1 4 Days 101025 ～ 984[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)8 ～ 508 ～ 50

-

1 4 Days 101225 ～ 1182[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)9 ～ 609 ～ 60

-

1 4 Days 101625 ～ 1180[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)10 ～ 8010 ～ 80

-

1 4 Days 102025 ～ 1174[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)13 ～ 10013 ～ 100

-

1 4 Days 103025 ～ 1464[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (58HRC~)18 ～ 15018 ～ 150

-

1 10 Days 10325 ～ 194[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)3 ～ 153 ～ 15

-

1 10 Days 10425 ～ 292[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)4 ～ 204 ～ 20

-

1 10 Days 10525 ～ 392[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)4 ～ 254 ～ 25

-

1 4 Days 10625 ～ 790[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)5 ～ 305 ～ 30

-

1 4 Days 10825 ～ 986[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)7 ～ 407 ～ 40

-

1 4 Days 101025 ～ 984[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)8 ～ 508 ～ 50

-

1 4 Days 101225 ～ 1182[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)9 ～ 609 ～ 60

-

1 4 Days 101625 ～ 1180[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)10 ～ 8010 ～ 80

-

1 4 Days 102025 ～ 1174[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)13 ～ 10013 ～ 100

-

1 4 Days 103025 ～ 1464[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingg6Induction Hardening (56HRC~)18 ～ 15018 ～ 150

-

1 4 Days 10625 ～ 596[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening5 ～ 305 ～ 30

-

1 4 Days 10825 ～ 796[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening7 ～ 407 ～ 40

-

1 4 Days 101025 ～ 796[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening8 ～ 508 ～ 50

-

1 4 Days 101225 ～ 996[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening9 ～ 609 ～ 60

-

1 4 Days 101625 ～ 1196[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening10 ～ 8010 ～ 80

-

1 4 Days 102025 ～ 1196[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening13 ～ 10013 ～ 100

-

1 4 Days 103025 ～ 1496[Stainless Steel (austenitic)] EN 1.4301 Equiv.No TreatmentHard Chrome Platingf8No Induction Hardening18 ～ 15018 ～ 150

-

1 7 Days 10325 ～ 194[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)3 ～ 153 ～ 15

-

1 7 Days 10425 ～ 292[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)4 ～ 204 ～ 20

-

1 7 Days 10525 ～ 392[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)4 ～ 254 ～ 25

-

1 7 Days 10625 ～ 890[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)5 ～ 305 ～ 30

-

1 7 Days 10825 ～ 1086[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)7 ～ 407 ～ 40

-

1 7 Days 101025 ～ 1184[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)8 ～ 508 ～ 50

-

1 7 Days 101225 ～ 1382[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)9 ～ 609 ～ 60

-

1 7 Days 101625 ～ 1380[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)10 ～ 8010 ～ 80

-

1 7 Days 102025 ～ 1374[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)13 ～ 10013 ～ 100

-

1 7 Days 103025 ～ 1464[Stainless Steel (martensitique)] EN 1.4037 Equiv.Induction HardenedHard Chrome Platingh5Induction Hardening (56HRC~)18 ～ 15018 ～ 150

-

1 12 Days 10325 ～ 194[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)3 ～ 153 ～ 15

-

1 12 Days 10425 ～ 292[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)4 ～ 204 ～ 20

-

1 12 Days 10525 ～ 392[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)4 ～ 254 ～ 25

-

1 12 Days 10625 ～ 500[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)5 ～ 305 ～ 30

-

1 12 Days 10825 ～ 500[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)7 ～ 407 ～ 40

-

1 12 Days 101025 ～ 500[Alloyed Steel] EN 1.3505 Equiv.Induction HardenedLTBC Platingg6Induction Hardening (58HRC~)8 ～ 508 ～ 50

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Back to Linear Shaft Category

Technical Drawing - Linear Shafts

 

Both Ends Threaded/Thread Dia. Equal to Shaft Dia.:Related Image
Annealing may lower hardness at shaft end machined areas (effective thread length + approx. 10mm). >>P.112
L Dimension Tolerance, Circularity, Straightness, Perpendicularity, Concentricity and Changes in Hardness >>P.111
Features of LTBC Plating Here

 

Specification Tables - Linear Shafts

 

Overview of the shaft designs as PDF

 

D Tol.
Dg6h5f8
3-0.002
-0.008		0
-0.004		-
4-0.004
-0.012		0
-0.005
5
6-0.010
-0.028
8-0.005
-0.014		0
-0.006		-0.013
-0.035
10
12-0.006
-0.017		0
-0.008		-0.016
-0.043
16
20-0.007
-0.020		0
-0.009		-0.020
-0.053
30
 
Part Number1mm IncrementM(Y)
Max.
TypeDLB, S
(D Tolerance g6)
SFAL
SSFAL
PSFAL
PSSFAL		(D Tolerance h5)
SFUL
SSFUL
PSFUL
PSSFUL		325~1943~153200
425~2924~204300
525~3924~255400
625~5905~306600
825~7867~408800
RSFAL (L≤500,Ymax≤800)

(D Tolerance f8)
PSFGL (D≥6)
PSSFGL (D≥6)		1025~7848~5010800
1225~9829~60121000
1625~118010~80161200
2025~117413~100201200
3025~146418~150301500
 
Coarse Thread Dimension
MPitch
30.5
40.7
50.8
61.0
81.25
101.5
121.75
162.0
202.5
303.5
For One End Threaded 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)-(Pitchx2).
L does not include incomplete threads.

 

Alterations - Linear Shafts


Both Ends Threaded/Thread Dia. Equal to Shaft Dia.:Related Image

You find further options in detail under Option Overview.

 

Basic information

Basic Shape Solid Shaft end Shape (Left) External thread Shaft end Shape (Right) External thread
Shaft end Perpendicularity 0.2

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Basic Attributes

  • [D] Diameter (Shaft)(mm)

    • 3
    • 4
    • 5
    • 6
    • 8
    • 10
    • 12
    • 16
    • 20
    • 30

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  • [L] Length (Shaft)(mm)

     [25-1496/1mm Unit(s)]

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  • Material

    • Unalloyed Steel
      • EN 1.1191 Equiv.
    • Stainless Steel (austenitic)
      • EN 1.4301 Equiv.
    • Alloyed Steel
      • EN 1.3505 Equiv.
    • Stainless Steel (martensitique)
      • EN 1.4037 Equiv.

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  • Heat Treatment

    • No Treatment
    • Induction Hardened

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  • Surface Treatment

    • No Treatment
    • Hard Chrome Plating
    • LTBC Plating

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  • ISO Tolerance

    • f8
    • g6
    • h5

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  • Hardness

    • Induction Hardening (56HRC~)
    • Induction Hardening (58HRC~)
    • No Induction Hardening

    Clear

  • [B] Length (thread)(mm)

     [3-150/1mm Unit(s)]

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  • [S] Length (thread)(mm)

     [3-150/1mm Unit(s)]

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  • Type

    • PSFAL
    • PSFGL
    • PSFUL
    • PSSFAL
    • PSSFGL
    • PSSFUL
    • RSFAL
    • SFAL
    • SFUL
    • SSFAL
    • SSFUL

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Optional Attributes

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.

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