Linear shafts / hollow / stepped on one side / internal thread

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Technical Drawing - Linear Shafts

Hollow/One End Stepped One End Tapped:Related Image

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

Type	Material	Hardness	Surface Treatment
SPJA	EN 1.3505 Equiv.	Effective Hardened Depth of Induction Hardening >>P.112 58HRC~	-
PSPJA			Hard Chrome Plating Plating Hardness: HV750 ~ Plating Thickness: 5µ or More
RSPJA			LTBC Plating

Further specifications can be found under the tab More Information.

Composition of a Product Code - Linear Shafts

Part Number	-	L	-	F	-	P	-	M
SPJA20	-	277	-	F25	-	P16	-	M16

Alterations - Linear Shafts

Hollow/One End Stepped One End Tapped:Related Image

You find further options in detail under Option Overview.

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Part Number
SPJA6-[25-598/1]-F[2-15/1]-P5-M3
SPJA8-[25-798/1]-F[2-21/1]-P[6-7/1]-M[4,5]
SPJA10-[25-798/1]-F[2-27/1]-P[7-9/1]-M[5,6]
SPJA12-[25-998/1]-F[2-33/1]-P[10-11/1]-M8
SPJA12-[25-998/1]-F[2-33/1]-P[10-11/1]-MT1
SPJA13-[25-998/1]-F[2-36/1]-P[10-12/1]-M10
SPJA13-[25-998/1]-F[2-36/1]-P[10-12/1]-MT1
SPJA16-[25-1198/1]-F[2-45/1]-P[13-15/1]-M12
SPJA16-[25-1198/1]-F[2-45/1]-P[13-15/1]-MT2
SPJA20-[25-1198/1]-F[2-57/1]-P[16-19/1]-M16
SPJA20-[25-1198/1]-F[2-57/1]-P[16-19/1]-MT3
SPJA25-[25-1198/1]-F[2-72/1]-P[20-24/1]-M20
SPJA30-[25-1498/1]-F[2-87/1]-P[22-29/1]-M20
SPJA35-[25-1498/1]-F[2-102/1]-P[24-34/1]-M24
SPJA40-[25-1498/1]-F[2-117/1]-P[25-39/1]-M[24,30]
SPJA50-[25-1498/1]-F[2-147/1]-P[32-49/1]-M30

Minimum order quantity	Standard Shipping Days ?	RoHS	[D] Diameter (Shaft) (mm)	[L] Length (Shaft) (mm)	Surface Treatment	[MT] Size (thread - cone)	[F] Length (stud - offset - front side) (mm)	[P] Diameter (stepped - front side) (mm)	[M] Size (thread - depth 2xM) (mm)
1	7 Days	10	6	25 ～ 598	No Treatment	-	2 ～ 15	5	3
1	7 Days	10	8	25 ～ 798	No Treatment	-	2 ～ 21	6 ～ 7	4 ～ 5
1	7 Days	10	10	25 ～ 798	No Treatment	-	2 ～ 27	7 ～ 9	5 ～ 6
1	7 Days	10	12	25 ～ 998	No Treatment	-	2 ～ 33	10 ～ 11	8
1	7 Days	10	12	25 ～ 998	No Treatment	1	2 ～ 33	10 ～ 11	-
1	7 Days	10	13	25 ～ 998	No Treatment	-	2 ～ 36	10 ～ 12	10
1	7 Days	10	13	25 ～ 998	No Treatment	1	2 ～ 36	10 ～ 12	-
1	7 Days	10	16	25 ～ 1198	No Treatment	-	2 ～ 45	13 ～ 15	12
1	7 Days	10	16	25 ～ 1198	No Treatment	2	2 ～ 45	13 ～ 15	-
1	7 Days	10	20	25 ～ 1198	No Treatment	-	2 ～ 57	16 ～ 19	16
1	7 Days	10	20	25 ～ 1198	No Treatment	3	2 ～ 57	16 ～ 19	-
1	7 Days	10	25	25 ～ 1198	No Treatment	-	2 ～ 72	20 ～ 24	20
1	7 Days	10	30	25 ～ 1498	No Treatment	-	2 ～ 87	22 ～ 29	20
1	7 Days	10	35	25 ～ 1498	No Treatment	-	2 ～ 102	24 ～ 34	24
1	7 Days	10	40	25 ～ 1498	No Treatment	-	2 ～ 117	25 ～ 39	24 ～ 30
1	7 Days	10	50	25 ～ 1498	No Treatment	-	2 ～ 147	32 ～ 49	30

Back to Linear Shaft Category

Technical Drawing - Linear Shafts

Specification Tables - Linear Shafts

Overview of the shaft designs as PDF

Part Number			1mm Increment			M (Coarse) Selection											(Y)Max.	d	R	C
Type	Dg6		L	F	P	M (Coarse) Selection											(Y)Max.	d	R	C
SPJA PSPJA RSPJA (D≤30,L≤500)	6	-0.004 -0.012	25~598	2≤F≤Px3	5≤P	3											600	2	0.3 or Less	0.5 or Less
	8	-0.005 -0.014	25~798		6≤P		4	5									800	3
	10	-0.005 -0.014	25~798		7≤P			5	6								800	4
	12	-0.006 -0.017	25~998		10≤P					8	T1 (RC1/8)						1000	6
	13		25~998		10≤P						10	T1 (RC1/8)					1000	7
	16		25~1198		13≤P							12	T2 (RC1/4)				1200	10
	20	-0.007 -0.020	25~1198		16≤P								16	T3 (RC3/8)			1200	14		1.0 or Less
	25		25~1198		20≤P									20			1200	16
	30		25~1498		22≤P									20			1500	17
	35	-0.009 -0.025	25~1498		24≤P										24		1500	19	0.5 or Less
	40		25~1498		25≤P										24	30	1500	20
	50		25~1498		32≤P											30	1500	26

When T1, T2 or T3 is selected as M, tapered thread machining is applied. (Ordering Code: MT1)
Overall length L requires Mx3≤L.

Alterations - Linear Shafts

Hollow/One End Stepped One End Tapped:Related Image

You find further options in detail under Option Overview.

Products homepage

Basic information

Basic Shape	Hollow, One End Stepped	Shaft end Shape (Left)	Straight	Shaft end Shape (Right)	Internal thread
Material	EN 1.3505 Equiv.	Heat Treatment	Induction Hardened	ISO Tolerance	g6
Hardness	Induction Hardening (58HRC~)

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Basic Attributes

[D] Diameter (Shaft)(mm)
6

8

10

12

13

16

20

25

30

35

40

50
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[L] Length (Shaft)(mm)
[25-1498/1mm Unit(s)]
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[MT] Size (thread - cone)
1

2

3
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[F] Length (stud - offset - front side)(mm)
[2-147/1mm Unit(s)]
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[P] Diameter (stepped - front side)(mm)
5
[6-49/1mm Unit(s)]
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[M] Size (thread - depth 2xM)(mm)
3

4

5

6

8

10

12

16

20

24

30
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Type
- PSPJA
- RSPJA
- SPJA
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Surface Treatment
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- Hard Chrome Plating
- LTBC Plating
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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.