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Ball Splines Key Provided Straight Nut, One End Double Stepped and Threaded

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Check FAQ of this product (3 items)

MISUMI

MiSUMi Economy

MISUMI

(i)Caution

The positional relationships between the grooves of the spline shafts, the keyways and oil holes of the nuts, and all alterations (wrench slots, planes, etc.) in the 3D model are for reference only, and may differ from the actual situation.

Part Number

Configured Part Number is shown.

Drawing
3D Preview
Part Numbers
Specifications

Product Overview of Spline Shaft

1. Spline Shaft rolls along the spherical groove using the steel ball inside the spline nut, allowing even a single-axis mechanism to perform linear motion while keeping the nut undeviated in the rotation direction.
2. Compared to the combination of guide shaft and linear bushing, Spline Shaft enables linear motion with high sensitivity and high precision, and can withstand higher loads.
3. Spline Shaft can safely transmit torque even under cantilever load and deliver high durability.

Product Features of Spline Shaft

1. Spline Shaft Shipping within 5 days after placing an order.
2. Drawing-based machining is no longer required, saving the time for design.
3. Spline Shaft length can be specified in 1mm increments.
4. Various alterations are available to meet different usage scenarios.
5. This product of Spline Shaft has a lower price compared to the MISUMI standard products (produced in Japan) and better performance compared to generic products on the market.

■We have professional testing equipment for guaranteed quality of Spline Shaft
Product Features

■For this product and Generic Products on the Market, we have conducted a service life comparison using a traveling tester of Spline Shaft.
→Test conditions of Spline Shaft:
Load: 50kgf
Speed: 40cm/s
Travel distance: 100km
Spline shaft diameter: 8mm
→Test result of Spline Shaft:
Product Features

* Generic products of Spline Shaft on the market are similar products randomly purchased by our company from online or offline markets.
* The test data are obtained through testing by our company, which are for reference only.

Dimensional Drawing of Spline Shaft

Accuracy grade	Spline shaft				Nut
Accuracy grade	Type of Spline Shaft	Material	Hardness	Surface Treatment	Type	Material	Hardness	Surface Treatment
Grade N	Solid	Equivalent to SUJ2	58HRC～	－	Straight	Equivalent to SCR420	58HRC～	－

Product Drawings of Spline Shaft (Unit: mm)

Specification Table of Spline Shaft

Type of Spline Shaft	D_h8	L 1mm increments	P Selection												F 1mm increments	M (Coarse) Selection (M≤P)										B 1mm increments
E-BSKS	8	60~300		4	5	6									When P＝4, 4≤F≤16 When P≥5, 4≤F≤P×5 F≥B+2		4	5	6							When M=4, 2≤B≤16 When M≥5, 2≤B≤M×5 B≥Pitch×3+ℓ
	10	60~400		4	5	6	8										4	5	6	8
	13	60~400			5	6	8	10										5	6	8	10
	16	70~600			5	6	8	10	12	13									6	8	10	12
	20	80~700					8	10	12	13	15	16	20						6	8	10	12	16
	25	90~900					8	10	12	13	15	16	20						6	8	10	12	16	20
	30	100~900						10	12	13	15	16	20	25						8	10	12	16	20	24

Type	D_h8	D₁		L₁	L₂	L₃	b_H8	h	r	t	u	Basic Rated Torque		Basic Load Rating		Static Allowable Moment
												Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)
			Tolerance									Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)
E-BSKS	8	16	0 -0.027	27	15.7	10.5	2.5	2.5	1.25	1.2	1.5	3.3	6	0.8	1.4	3.5	25.2
	10	21	0 -0.033	33	20	13	3	3	1.5	1.5		13.3	23.8	2.6	3.9	9.5	85.3
	13	24	0 -0.033	36	23	15	3	3	1.5	1.5		19.6	36.4	3.2	5.4	15	124.6
	16	31	0 -0.039	50	34	17.5	3.5	3.5	1.75	2	2	35.7	65.1	4.3	7.7	37.1	260
	20	35		56	39.7	29	4	4	2	2.5	2	59.5	107.8	5.9	10.7	55.3	380
	25	42		71	50.3	36					3	135.1	243.6	10	15	103.5	685.9
	30	47		80	60	42					3	190.4	343	11	19.6	148.4	932.7

When Spline Shaft ③ is configured, there is no guarantee that the keyway positions of the 2 nuts are concentric.

When Spline Shaft ④ is configured, the surface will be light yellow, and there may be a color difference.
Due to the surface treatment process, the following parts are more susceptible to rust.
-Cut section
-Groove part
-Cut section

The relative positions of the grooves of Spline Shaft, the keyways and oil holes of nuts, and all the alterations (wrench flat, set screw flat, etc.) in the 3D modelare for reference only and may differ from their actual positions.

Unit: μm

	Max. Runout of Spline Axis Line
Shaft Dia. D	~200	201~315	316~400	401~500	501~630	631~800	801~900
8	72	133	185	236	－	－	－
10	59	83	103	123	151	190	－
13	56	71	83	95	112	137	170
16
20
25	53	58	70	78	88	103	124
30

Related Products of Spline Shaft

■Ball Screws

Precision Ball Screws
Φ8	Φ10	Φ12	Φ15	Φ20	Φ25

Rolled Ball Screws
Φ8	Φ10	Φ12	Φ15	Φ20	Φ25

Precautions of Spline Shaft

■Precautions for Selection and Use of Spline Shaft
1. The relative positions of the grooves of Spline Shaft, the keyways and oil holes of straight nuts, and all the alterations (wrench flat, set screw flat, etc.) in the 3D model are for reference only and may differ from their actualpositions.
2. When re-inserting a nut into the Spline Shaft, be sure to insert it horizontally, otherwise the ball will fall off.
3. As resin parts are used inside the nuts, please use them at temperatures below 80℃.
4. Although the nuts are greased on the inside before leaving the factory, please re-grease them every 2~3 months or every 50km of traveling distance after receipt of the goods, otherwise their use will be impaired.
5. No guarantee is given for the noise level of this product.
6. No guarantee is given that the Spline Shaft or nuts of this product will fall freely.
7. This product is a machined type, so there will be knife patterns and color difference in its appearance. It is normal for the product to have some scratches or color changes. Please feel free to use.
8. The Spline Shaft is quenched, and annealed during machining.
Due to the annealing treatment, the hardness of the machined part + area about 15 mm before and after the part may be reduced (see the following example). And the annealed section is out of the guaranteed range of outerdiameter dimensional tolerance.
Subtract the size of the annealed section when calculating the stroke.

The parts that may be reduced in hardness due to annealing are:
·Threaded parts
·Stepped parts
·Tapped parts
·Alterations of wrench flats, set screw flat, retaining ring grooves, and tapped holes

Example Use of Spline Shaft

Part Number

CAD Data download and 3D preview are not available because the part number has not yet been determined.

*In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.

CAD Download

: 30; 45; 60

Part Number
E-BSKS8-[60-300/1]-P[4,5,6]-F[4-30/1]-M[4,5,6]-B[2-30/1]
E-BSKS10-[60-400/1]-P[4,5,6,8]-F[4-40/1]-M[4,5,6,8]-B[2-40/1]
E-BSKS13-[60-400/1]-P[5,6,8,10]-F[4-50/1]-M[5,6,8,10]-B[2-50/1]
E-BSKS16-[70-600/1]-P[5,6,8,10,12,13]-F[4-65/1]-M[6,8,10,12]-B[2-60/1]
E-BSKS20-[80-700/1]-P[8,10,12,13,15,16,20]-F[4-80/1]-M[6,8,10,12,16]-B[2-90/1]
E-BSKS25-[90-900/1]-P[8,10,12,13,15,16,20]-F[4-100/1]-M[6,8,10,12,16,20]-B[2-100/1]
E-BSKS30-[100-900/1]-P[10,12,13,15,16,20,25]-F[4-125/1]-M[8,10,12,16,20,24]-B[2-120/1]

Standard Unit Price	Minimum order quantity	Days to Ship	Shaft Outer Dia. D (Ø)	Shaft Overall Length L (mm)	Spline shaft Left end Stepped shaft Dia. [P] (mm)	Spline shaft Left end Stepped length [F] (mm)	Spline shaft Left end Threading [M] (mm)	Spline shaft Left end Tapping length [B] (mm)
-	1 Piece(s)	12 Day(s)	8	60 ～ 300	4 ～ 6	4 ～ 30	4 ～ 6	2 ～ 30
-	1 Piece(s)	12 Day(s)	10	60 ～ 400	4 ～ 8	4 ～ 40	4 ～ 8	2 ～ 40
-	1 Piece(s)	12 Day(s)	13	60 ～ 400	5 ～ 10	4 ～ 50	5 ～ 10	2 ～ 50
-	1 Piece(s)	12 Day(s)	16	70 ～ 600	5 ～ 13	4 ～ 65	6 ～ 12	2 ～ 60
-	1 Piece(s)	12 Day(s)	20	80 ～ 700	8 ～ 20	4 ～ 80	6 ～ 16	2 ～ 90
-	1 Piece(s)	12 Day(s)	25	90 ～ 900	8 ～ 20	4 ～ 100	6 ～ 20	2 ～ 100
-	1 Piece(s)	12 Day(s)	30	100 ～ 900	10 ～ 25	4 ～ 125	8 ～ 24	2 ～ 120

Dimensional Drawing

Specification Table

Type	D_h8	L 1mm increments	P Selection												F 1mm increments	M (Coarse) Selection (M≤P)										B 1mm increments
E-BSKS	8	60~300		4	5	6									When P＝4, 4≤F≤16 When P≥5, 4≤F≤P×5 F≥B+2		4	5	6							When M=4, 2≤B≤16 When M≥5, 2≤B≤M×5 B≥Pitch×3+ℓ
	10	60~400		4	5	6	8										4	5	6	8
	13	60~400			5	6	8	10										5	6	8	10
	16	70~600			5	6	8	10	12	13									6	8	10	12
	20	80~700					8	10	12	13	15	16	20						6	8	10	12	16
	25	90~900					8	10	12	13	15	16	20						6	8	10	12	16	20
	30	100~900						10	12	13	15	16	20	25						8	10	12	16	20	24

Type	D_h8	D₁		L₁	L₂	L₃	b_H8	h	r	t	u	Basic Rated Torque		Basic Load Rating		Static Allowable Moment
												Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)
			Tolerance									Dynamic C_t (N·m)	Static C_0t (N·m)	Dynamic C (kN)	Static C₀ (kN)	M₀₁ (N·m)	M₀₂ (N·m)
E-BSKS	8	16	0 -0.027	27	15.7	10.5	2.5	2.5	1.25	1.2	1.5	3.3	6	0.8	1.4	3.5	25.2
	10	21	0 -0.033	33	20	13	3	3	1.5	1.5		13.3	23.8	2.6	3.9	9.5	85.3
	13	24	0 -0.033	36	23	15	3	3	1.5	1.5		19.6	36.4	3.2	5.4	15	124.6
	16	31	0 -0.039	50	34	17.5	3.5	3.5	1.75	2	2	35.7	65.1	4.3	7.7	37.1	260
	20	35		56	39.7	29	4	4	2	2.5	2	59.5	107.8	5.9	10.7	55.3	380
	25	42		71	50.3	36					3	135.1	243.6	10	15	103.5	685.9
	30	47		80	60	42					3	190.4	343	11	19.6	148.4	932.7

Material Specification

Accuracy grade	Spline shaft				Nut
Accuracy grade	Type	Material	Hardness	Surface Treatment	Type	Material	Hardness	Surface Treatment
Grade N	Solid	Equivalent to SUJ2	58HRC～	－	Straight	Equivalent to SCR420	58HRC～	－

Alterations

When ③ is configured, there is no guarantee that the keyway positions of the 2 nuts are concentric.

When ④ is configured, the surface will be light yellow, and there may be a color difference.
Due to the surface treatment process, the following parts are more susceptible to rust.
-Cut section
-Groove part
-Cut section

The relative positions of the grooves of spline shaft, the keyways and oil holes of nuts, and all the alterations (wrench flat, set screw flat, etc.) in the 3D model are for reference only and may differ from their actual positions.
Dimension 3

Unit: μm

	Max. Runout of Spline Axis Line
Shaft Dia. D	~200	201~315	316~400	401~500	501~630	631~800	801~900
8	72	133	185	236	－	－	－
10	59	83	103	123	151	190	－
13	56	71	83	95	112	137	170
16
20
25	53	58	70	78	88	103	124
30

Basic Information

Nut Type	Compact Flange	Type	Solid Shaft	End Shape (Left)	Stepped and Threaded
End Shape (Right)	Standard	Shaft material	SUJ2 Equivalent	Nut Material	SCR420 Equivalent

Configure

7 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

type
- E-BSKS
Clear
Shaft Outer Dia. D(Ø)
8

10

13

16

20

25

30
Clear
Shaft Overall Length L(mm)
[60-900/1mm Unit(s)]
Clear
Spline shaft Left end Stepped shaft Dia. [P](mm)
4

5

6

8

10

12

13

15

16

20

25
Clear
Spline shaft Left end Stepped length [F](mm)
[4-125/1mm Unit(s)]
Clear
Spline shaft Left end Threading [M](mm)
4

5

6

8

10

12

16

20

24
Clear
Spline shaft Left end Tapping length [B](mm)
[2-120/1mm Unit(s)]
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

12 Day(s) 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 question (FAQ)

Question: Do the 3D model on the official website and the actual product have the same positional relationships between the grooves of the spline shafts, the keyways and oil holes of the straight cylinder nuts, and all alterations (wrench slots, planes, etc.)?: Answer: They may be different.
Question: Can it be used in high-temperature or special environments?: Answer: The ball spline uses resin parts. Please use it in environments below 80° C and avoid using it under high temperature conditions or in special environments.
Question: Can the nut be removed from the spline shaft?: Answer: As there is a retainer inside the nut, even if removed, the steel ball is less likely to fall. However, it is recommended not to remove it. If it must be removed, please be careful to prevent the steel ball from falling.

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Ball Splines Key Provided Straight Nut, One End Double Stepped and Threaded

(i)Caution

Product Overview of Spline Shaft

Product Features of Spline Shaft

Dimensional Drawing of Spline Shaft

Specification Table of Spline Shaft

Related Products of Spline Shaft

Precautions of Spline Shaft

Example Use of Spline Shaft

Part Number

Basic Information

Configure

Specification/Dimensions

type

Shaft Outer Dia. D(Ø)

Shaft Overall Length L(mm)

Spline shaft Left end Stepped shaft Dia. [P](mm)

Spline shaft Left end Stepped length [F](mm)

Spline shaft Left end Threading [M](mm)

Spline shaft Left end Tapping length [B](mm)

CAD

Days to Ship

Specify Alterations

Frequently asked question (FAQ)

Additional Products in this Category

Tech Support

Payment Method

About MISUMI

About this Website

Useful Tools

Customer Service

Social Media

MISUMI Contact 9am – 6pm (Mon – Fri) * Order cut-off time is 5pm, 9am – 1pm(Sat) * Order cut-off time is 12pm