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

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

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(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.

Product Overview
1. Ball spline 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, ball spline enables linear motion with high sensitivity and high precision, and can withstand higher loads.
3. Ball spline can safely transmit torque even under cantilever load and deliver high durability.
Product Features
1. 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 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
Product Features

■For this product and Generic Products on the Market, we have conducted a service life comparison using a traveling tester.
→Test conditions:
Load: 50kgf
Speed: 40cm/s
Travel distance: 100km
Spline shaft diameter: 8mm
→Test result:
Product Features
* Generic products 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
Accuracy gradeSpline shaftNut
Type Material Hardness Surface TreatmentType Material Hardness Surface Treatment
Grade NSolidEquivalent to SUJ258HRC~StraightEquivalent to SCR42058HRC~
Product Drawings (Unit: mm)



Dimension 2
 
Specification Table
Ordering Example
 

Type

Dh8
L
1mm increments
P
Selection
F
1mm increments
M (Coarse)
Selection (M≤P)
B
1mm increments
E-BSKS860~300 456        When P=4,
4≤F≤16
When P≥5,
4≤F≤P×5
F≥B+2
 456      When M=4,
2≤B≤16
When M≥5,
2≤B≤M×5
B≥Pitch×3+ℓ
1060~400 4568        4568     
1360~400  56810        56810    
1670~600  568101213       681012   
2080~700    8101213151620    68101216  
2590~900    8101213151620    6810121620 
30100~900     10121315162025    81012162024
 
TypeDh8D1 L1L2L3bH8hrtuBasic Rated TorqueBasic Load RatingStatic Allowable Moment
Dynamic Ct
(N·m)
Static C0t
(N·m)
Dynamic C
(kN)
Static C0
(kN)
M01
(N·m)
M02
(N·m)
Tolerance
E-BSKS8160
-0.027
2715.710.52.52.51.251.21.53.360.81.43.525.2
10210
-0.033
332013331.51.513.323.82.63.99.585.3
132436231519.636.43.25.415124.6
16310
-0.039
503417.53.53.51.752235.765.14.37.737.1260
20355639.7294422.559.5107.85.910.755.3380
25427150.3363135.1243.61015103.5685.9
3047806042190.43431119.6148.4932.7

Dimension 3
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~200201~315316~400401~500501~630631~800801~900
872133185236
105983103123151190
1356718395112137170
16
20
255358707888103124
30
Related Products
■Ball Screws
Precision Ball Screws
Φ8Φ10Φ12Φ15Φ20Φ25
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Rolled Ball Screws
Φ8Φ10Φ12Φ15Φ20Φ25
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Precautions
■Precautions for Selection and Use
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 actual positions.
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 outer diameter dimensional tolerance.
  Subtract the size of the annealed section when calculating the stroke.
Precautions
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 of Use

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.
Loading...
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]
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipShaft 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) 8 Day(s) 860 ~ 3004 ~ 64 ~ 304 ~ 62 ~ 30

-

1 Piece(s) 8 Day(s) 1060 ~ 4004 ~ 84 ~ 404 ~ 82 ~ 40

-

1 Piece(s) 8 Day(s) 1360 ~ 4005 ~ 104 ~ 505 ~ 102 ~ 50

-

1 Piece(s) 8 Day(s) 1670 ~ 6005 ~ 134 ~ 656 ~ 122 ~ 60

-

1 Piece(s) 8 Day(s) 2080 ~ 7008 ~ 204 ~ 806 ~ 162 ~ 90

-

1 Piece(s) 8 Day(s) 2590 ~ 9008 ~ 204 ~ 1006 ~ 202 ~ 100

-

1 Piece(s) 8 Day(s) 30100 ~ 90010 ~ 254 ~ 1258 ~ 242 ~ 120

Loading...

  1. 1
Dimensional Drawing
Dimension 2
Specification Table
Ordering Example
 

Type

Dh8
L
1mm increments
P
Selection
F
1mm increments
M (Coarse)
Selection (M≤P)
B
1mm increments
E-BSKS860~300 456        When P=4,
4≤F≤16
When P≥5,
4≤F≤P×5
F≥B+2
 456      When M=4,
2≤B≤16
When M≥5,
2≤B≤M×5
B≥Pitch×3+ℓ
1060~400 4568        4568     
1360~400  56810        56810    
1670~600  568101213       681012   
2080~700    8101213151620    68101216  
2590~900    8101213151620    6810121620 
30100~900     10121315162025    81012162024
 
TypeDh8D1 L1L2L3bH8hrtuBasic Rated TorqueBasic Load RatingStatic Allowable Moment
Dynamic Ct
(N·m)
Static C0t
(N·m)
Dynamic C
(kN)
Static C0
(kN)
M01
(N·m)
M02
(N·m)
Tolerance
E-BSKS8160
-0.027
2715.710.52.52.51.251.21.53.360.81.43.525.2
10210
-0.033
332013331.51.513.323.82.63.99.585.3
132436231519.636.43.25.415124.6
16310
-0.039
503417.53.53.51.752235.765.14.37.737.1260
20355639.7294422.559.5107.85.910.755.3380
25427150.3363135.1243.61015103.5685.9
3047806042190.43431119.6148.4932.7
Material Specification
Accuracy gradeSpline shaftNut
Type Material Hardness Surface TreatmentType Material Hardness Surface Treatment
Grade NSolidEquivalent to SUJ258HRC~StraightEquivalent to SCR42058HRC~
Alterations
Alterations
Dimension 3
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~200201~315316~400401~500501~630631~800801~900
872133185236
105983103123151190
1356718395112137170
16
20
255358707888103124
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

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.

Tech Support