Ball Splines-Hollow Type, Round Flanged

Brand :

MISUMI

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.

Product Description

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 of Spline Shaft and Generic Products on the Market, we have conducted a service life comparison using a traveling tester.
→Test conditions of Spline Shaft:
Load: 50kgf
Speed: 40cm/s
Travel distance: 100km
Spline Shaft diameter of Spline Shaft: 8mm
→Test result:
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 of Spline Shaft	Material	Hardness	Surface Treatment
Grade N	Solid	Equivalent to SUJ2	58HRC～	－	Round flanged	Equivalent to SCR420	58HRC～	－

Product Drawings of Spline Shaft (Unit: mm)

Specification Table of Spline Shaft

Type of Spline Shaft	Dh8	L 1mm increments	d	D₁		D₂	L₁	H	W	P.C.D	X	Y	Z	u	Thickness deviation A-B	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
E-BKSM	13	60~300	7	24	0 -0.033	44	36	9	11	33	4.5	8	4.5	1.5	1.0 or Less	19.6	36.4	3.2	5.4	15	124.6
	16	70~500	8	31	0 -0.039	51	50	10	18	40			6	2		35.7	65.1	4.3	7.7	37.1	260
	20	80~600	10	35		58	56			45	5.5	9.5	5.4			59.5	107.8	5.9	10.7	55.3	380
	25	90~800	15	42		65	71	13	26.5	52			8	3		135.1	243.6	10	15	103.5	685.9
	30	100~800	16	47		75	80		30	60	6.6	11				190.4	343	11	19.6	148.4	932.7

When Spline Shaft ② is configured, the surface will be light yellow, and there may be a color difference.
The following parts may not be plated and may rust.
-Cut section
-Groove part -Inner hole of spline shaft

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

Dimensional Drawing

Specification Table

Type	Dh8	L 1mm increments	d	D₁		D₂	L₁	H	W	P.C.D	X	Y	Z	u	Thickness deviation A-B	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
E-BKSM	13	60~300	7	24	0 -0.033	44	36	9	11	33	4.5	8	4.5	1.5	1.0 or Less	19.6	36.4	3.2	5.4	15	124.6
	16	70~500	8	31	0 -0.039	51	50	10	18	40			6	2		35.7	65.1	4.3	7.7	37.1	260
	20	80~600	10	35		58	56			45	5.5	9.5	5.4			59.5	107.8	5.9	10.7	55.3	380
	25	90~800	15	42		65	71	13	26.5	52			8	3		135.1	243.6	10	15	103.5	685.9
	30	100~800	16	47		75	80		30	60	6.6	11				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～	－	Round flanged	Equivalent to SCR420	58HRC～	－

Alterations

When ② is configured, the surface will be light yellow, and there may be a color difference.
The following parts may not be plated and may rust.
-Cut section
-Groove part -Inner hole of spline shaft
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