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Ball Splines - One End Stepped and Threaded (Part Numbers)

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MISUMI

For the customer who orders 5 pcs. or more for the same part number, the profitable and convenient volume discount rate is set up.

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Ball Splines - One End Stepped and Threaded:Related Image
[ ! ]When selecting Overall Length (L Dimension), check the Annealing Range. >> Click here
[ ! ]Accuracy >> Click here

・Materials

One End Stepped and Threaded	Spline Shaft [ M ] 52100 Bearing Steel Nut [ M ] SCM415 Alloy Steel (JIS) Equivalent [ H ] Hardness: 58HRC~	Spline Shaft, Nut [ M ] 440C Stainless Steel [ H ] Hardness: 55HRC ~
One End Stepped and Threaded	Nut 1 pc.	Nut 1 pc.
With Round Flange Nut	BSKM	BSKMS
With Compact Flange Nut	BSKN	-
With Straight Nut	BSKS	BSKSS

Ball Splines - One End Stepped and Threaded:Related Image

Specifications

Part Number	-	L	-	F	-	B	-	P	-	M
BSKS8 BSKS8G BSKS8L	- - -	250 250 250	- - -	F20 F20 F20	- - -	B15 B15 B15	- - -	P6 P6 P6	- - -	M6 M6 M6

Alternative grease types available.
For Days to Ship, Price and Performance, see >> Click here

■Spline Shafts

Part Number		1mm Increment			P												M (Coarse) (M≤P)										D	(Y)	Mass (kg/m)
Type	No.	L	F	B																								1-Nut Type
Type	No.	1-Nut Type	F	B																								min~max
BSKM BSKN BSKS BSKMS BSKSS	*6	60~400 (190)	When P=3 4≤F≤9 When P=4 4≤F≤16 When P≥5 4≤F≤Px5 [ ! ]F≥B+2	When M=3 2≤B≤9 When M=4 2≤B≤16 When M≥5 2≤B≤Mx5 [ ! ]B≥Pitchx3+ℓ [ ! ]For Stainless Steel materials, M≤B≤Mx3	3	4	5										3	4	5								6	56~396 (186)	0.23
	*8	60~400 (190)				4	5	6										4	5	6							8	56~396 (186)	0.39
	*10	60~600 (390)				4	5	6	8									4	5	6	8						10.4	56~596 (386)	0.65
	*13	60~600 (390)					5	6	8	10									5	6	8	10					13.4	56~596 (386)	1.11
	*16	70~600 (390)					5	6	8	10	12	13								6	8	10	12				16.6	66~596 (386)	1.65
	20	80~700							8	10	12	13	15	16	20					6	8	10	12	16			20.6	76~696	2.57
	25	90~900							8	10	12	13	15	16	20					6	8	10	12	16	20		25.8	86~896	4.04
	30	100~1150								10	12	13	15	16	20	25					8	10	12	16	20	24	30.8	96~1146	5.85

[ ! ]For BSKSS and BSKMS, only *marked sizes are available, and the Max. L and Y dimensions are in ( ).
[ ! ]For BSKN, only No. 6, 8 and 10 are available.

■Round Flange Nuts / Compact Flange Nuts

No.	D (h6)	L	Df	H	P.C.D.	d₁	d₂	h	W	d	B	Basic Rated Torque		Basic Load Rating		Allowable Static Moment		Mass (kg)
No.	D (h6)	L	Df	H	P.C.D.	d₁	d₂	h	W	d	B	Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)	Mass (kg)
6	14	25	30	6	22	3.5	6	3.1	6.5	1.5	18	3.8	7	1.2	2.1	5	36	0.03
8	16	25	32	6	24	3.5	6	3.1	6.5		21	4.8	8.7	1.2	2.1	5	36	0.04
10	21	40 (33)	42 (41)	6 (8)	32 (30)	4.5	8	4.4 (5.3)	14 (8.5)		25	19 (11)	34 (21)	3.8 (2.4)	6.9 (4.3)	26 (15)	181 (102)	0.09
13	24	44 (36)	44 (45)	7 (8)	33 (34)			4.4 (5.3)	15 (10)		-	28 (20)	52 (37)	4.6 (3.3)	8.3 (5.9)	36 (22)	251 (148)	0.11
16	31	50	51	7	40			4.4	18			51	93	6.2	11.1	56	386	0.2
20	35	63	58	9	45	5.5	9.5	5.4	22.5	2		85	154	8.5	15.3	83	611	0.3
25	42	71	65	9	52	5.5	9.5	5.4	26.5	2		193	348	15.4	27.7	173	1248	0.4
30	47	80	75	10	60	6.6	11	6.5	30	2.5		272	490	18.5	33.3	212	1581	0.57

[ ! ]Dimensions in ( ) are for 440C Stainless Steel. [ ! ]Allowable static moment M₀₁ is a value measured when a single nut is used, and M₀₂ is a value measured when two nuts are used.

■Straight Nuts

No.	D (h6)	L	b		t +0.05 ++0 ( )	d	α	Basic Rated Torque		Basic Load Rating		Allowable Static Moment		Mass (kg)	Dimension of Key (Included)
				Tolerance				Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)		B		h		L₁	R
																Tolerance		Tolerance
6	14	25	2.5	+0.014 +0.14	1.2	1.5	15°	3.8	7	1.2	2.1	5	36	0.012	2.5	+0.016 +0.006	2.5	-0.25 -0.025	10.5	1.25
8	16						25°	4.8	8.7	1.2	2.1	5	36	0.013					10.5
10	21	40 (33)	3		1.5		-	19 (11)	34 (21)	3.8 (2.4)	6.9 (4.3)	26 (15)	181 (102)	0.06	3		3		17 (14)	1.5
13	24	44 (36)						28 (20)	52 (37)	4.6 (3.3)	8.3 (5.9)	36 (22)	251 (148)	0.07					17 (14)
16	31	50	3.5	+0.018 +0.14	2			51	93	6.2	11.1	56	386	0.15	3.5	+0.024 +0.012	3.5	-0.25 -0.030	18	1.75
20	35	63	4		2.5	2		85	154	8.5	15.3	83	611	0.2	4		4		29	2
25	42	71						193	348	15.4	27.7	173	1248	0.29					33
30	47	80				2.5		272	490	18.5	33.3	212	1581	0.37					42

[ ! ]Dimensions in ( ) are for 440C Stainless Steel. [ ! ]Allowable static moment M₀₁ is a value measured when a single nut is used, and M₀₂ is a value measured when two nuts are used.

Alterations

Orientation between wrench flats or set screw flats to the spline nut keyway or flange counterbores are random and cannot be specified.

Part Number

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Part Number

Part Number	Minimum order quantity	Volume Discount	Days to Ship	RoHS	Nut Type	Shaft O.D. D (Ø)	Shaft material	Nut Overall Length (mm)	Nut O.D. (Ø)	Shaft Total Length L (mm)	Basic Load Rating, Dynamic Rating (N)	Allowable Torque (N•m)	Nut Material	Grease	B (mm)	F (mm)	M (mm)	P (mm)

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Basic Information

End Shape (Left)	Stepped Threaded	End Shape (Right)	Standard	Type	Solid
Number of Nuts(pc(s).)	1	Ball Recirculating Type	Single

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87 Part Numbers

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Specification/Dimensions

Nut Type
- Straight
- Flanged Type
  - Compact Flanged
  - Round Flanged
Clear
Shaft O.D. D(Ø)
6

8

10.4

13.4

16.6

20.6

25.8

30.8
Clear
Shaft material
- 440C Stainless Steel
- 52100 Bearing Steel Equivalent
Clear
Nut Overall Length(mm)
25

33

36

40

44

50

63

71

80
Clear
Nut O.D.(Ø)
14

16

21

24

31

35

42

47
Clear
Shaft Total Length L(mm)
[60-1150/1mm Unit(s)]
Clear
Nut Material
- SCM415 Alloy Steel (JIS) Equivalent
- 440C Stainless Steel
Clear
Grease
- ET-100K
- LG2
- Standard (S2)
Clear
B(mm)
[3-120/1mm Unit(s)]
Clear
F(mm)
[6-120/1mm Unit(s)]
Clear
M(mm)
3

4

5

6

8

10

12

16

20

24
Clear
P(mm)
3

4

5

6

8

10

12

13

15

16

20

25
Clear
type
- BSKM
- BSKMS
- BSKN
- BSKS
- BSKSS
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

12 Days or Less

13 Days or Less

14 Days or Less

15 Days or Less
Clear

Specify Alterations

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

Frequently asked questions (FAQ)

質問: Can I remove the ball spline nut?: 回答: "Yes. The balls do not fall out when the spline shaft is pulled out. Once the nuts are removed from the spline shaft, reassemble the ball spline while confirming matching numbers, character orientations, and positional relationship of these parts. Nuts and shafts are offered as a set product. When using multiple pieces of them, do not change the default combination."
質問: What is the life expectancy of a ball spline?: 回答: The theoretical life can be calculated using the formulas found here: https://us.misumi-ec.com/pdf/fa/2012/p1_0305.pdf
質問: What is the accuracy of the ball spline?: 回答: Ball spline accuracy can be found here: https://us.misumi-ec.com/pdf/fa/2012/p1_0305.pdf
質問: Do you sell ball spline nuts separately: 回答: We do not sell ball spline nuts separately. They must be purchased as a set.

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Technical Support: Tel：+52-442-672-7661 ext. 2 then wait and dial 4
E-mail: soportetecnico@misumimex.com; Mon. - Fri. 8 a.m. - 6 p.m.; Technical Inquiry

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Ball Splines - One End Stepped and Threaded (Part Numbers)

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Basic Information

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Specification/Dimensions

Nut Type

Shaft O.D. D(Ø)

Shaft material

Nut Overall Length(mm)

Nut O.D.(Ø)

Shaft Total Length L(mm)

Nut Material

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Contact us Monday to Friday: 8:00 am to 6:00 pm (Mexico City time)