What are spline shafts and their primary function in linear motion?

Spline shafts are cylindrical rods with ridges or teeth along their length, known as splines. Their primary function in linear motion is to convert rotational motion into smooth and precise linear movement. These splines engage with complementary components to transmit torque efficiently, ensuring controlled motion without slipping or backlash. Spline shafts are crucial in various machinery applications where accurate linear motion is required, such as moving heavy loads or guiding tools with precision, providing reliable and efficient motion control.

Can you explain the key characteristics of square splines?

Square splines feature square-shaped ridges and slots, offering efficient torque transmission and precise alignment. Their design allows for high torque capacity and compatibility with various mating components. Due to their simplicity of manufacture, they are cost-effective for many applications. Additionally, the even distribution of wear along the mating surfaces enhances durability. Square splines are widely used in industrial and mechanical systems where accurate motion control and reliable torque transmission are essential.

What role do spline shafts play in automotive transmissions?

Spline shafts are essential in automotive transmissions for transferring power from the engine to the wheels. They connect parts like the clutch and gears, ensuring smooth power transmission. By enabling the engine's rotational motion to move the wheels with precision, they allow the vehicle to accelerate, decelerate, and shift gears seamlessly. Essentially, spline shafts ensure that your car moves smoothly and efficiently, contributing to its overall performance and driving experience.

What factors should be considered when choosing a spline shaft?

When selecting a spline shaft, it's important to consider factors like the application's torque, speed, and precision requirements. Choose a spline profile and dimensions that match mating components to ensure efficient power transmission. Material selection is key for strength and corrosion resistance. The surface finish impacts durability, while manufacturing methods and costs should be evaluated. Supplier reliability is also crucial. By carefully considering these factors, you can choose a spline shaft that meets your application's needs effectively, ensuring optimal performance and longevity.

What materials are commonly used for manufacturing spline shafts?

Spline shafts are commonly made from materials like steel, aluminum, brass, bronze, titanium, and plastics. Steel offers strength and durability, while aluminum is lightweight. Brass and bronze provide corrosion resistance. Titanium is strong and corrosion-resistant, ideal for demanding environments. Plastics offer benefits like low friction and electrical insulation. The choice depends on factors such as strength, corrosion resistance, weight, and cost.

What are the maintenance requirements for spline shafts?

Maintaining spline shafts involves regular checks for wear, damage, and corrosion. Keep them lubricated to reduce friction and ensure smooth operation. Clean them regularly to prevent dirt buildup. Properly align mating components to avoid unnecessary stress on the shafts. Promptly replace any worn or damaged shafts to prevent further issues. Protect spline shafts from harsh environments and store them correctly when not in use. Following these steps will help ensure the longevity and efficient performance of spline shafts in machinery and equipment.

How do nut types of influence spline shaft functionality?

The type of nut used can significantly affect spline shaft functionality. Slotted nuts provide anti-rotation, ensuring the nut and shaft move together for enhanced torque transmission. Hex nuts offer stability with six sides but lack anti-rotation features. Lock nuts prevent unintentional loosening, employing mechanisms like nylon inserts or serrations. Flange nuts distribute load over a wider area with a built-in washer-like flange. Self-locking nuts have integrated locking features to prevent loosening due to vibrations or external forces. Each type suits specific applications based on torque requirements, environmental conditions, and space constraints.

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Spline Shaft（End Shape (Left)：Stepped and Threaded）

A spline shaft is a mechanical component designed to transfer torque between two rotating parts while allowing for linear motion or axial displacement. It features a series of ridges or teeth, called splines, along its length. These splines mesh with corresponding grooves in a mating component, such as a gear or coupling, enabling efficient torque transmission while permitting movement along the shaft's axis. Spline shafts are commonly used in various applications requiring precise torque transmission and axial movement, including automotive transmissions, industrial machinery, robotics, and aerospace systems. They offer advantages such as improved power transmission efficiency, reduced backlash, and enhanced load-bearing capacity compared to other shaft coupling methods, making them essential components in many mechanical systems. To select a spline shaft from MISUMI, determine the required specifications such as length, diameter, spline type, material, and any additional features. Then, use MISUMI's online catalog or contact direct our MISUMI for assistance.

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Nut Type	Key Provided Type Flanged Type
Brand	(7) (4) MIYOSHI KIKAI (0) OZAK (0)
CAD	2D 3D
Days to Ship	All 10 Day(s) or Less 11 Day(s) or Less 12 Day(s) or Less 13 Day(s) or Less 14 Day(s) or Less

7 items

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: 30; 45; 60

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Ball Splines - Both Ends Stepped and Threaded

MISUMI

A ball spline with stepped male threads on both ends. This standard enables highly accurate linear motion and rotational torque transmission. In addition, the contact area between the ball groove machined into the shaft and the steel ball is large, resulting in a large load capacity and long life. Even a single axis can be used as a linear motion guide, allowing for a compact design.
A dustproof seal is attached to the nut, so the ball will not fall off even if the spline shaft is removed.

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Key Provided Type / Flanged Type	6 ～ 30.8	Solid	Standard	25 ～ 80	14 ～ 47	Standard	Standard Grade	Stepped and Threaded	Stepped and Threaded	Middle Torque	SUS440C Equivalent / SUJ2 Equivalent	-

Days to Ship: 10 Day(s) or more

10 Day(s) or more

You can add up to 6 items per a category to the compare list. Compare

Ball Splines - One End Stepped and Threaded, One End Tapped

MISUMI

A ball spline with a stepped male thread on one end and a female thread on the other end. This standard enables highly accurate linear motion and rotational torque transmission. In addition, the contact area between the ball groove machined into the shaft and the steel ball is large, resulting in a large load capacity and long life. Even a single axis can be used as a linear motion guide, allowing for a compact design.
A dustproof seal is attached to the nut, so the ball will not fall off even if the spline shaft is removed.

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Key Provided Type / Flanged Type	6 ～ 30.8	Solid	Standard	25 ～ 80	14 ～ 47	Standard	Standard Grade	Stepped and Threaded	Tapped	Middle Torque	SUS440C Equivalent / SUJ2 Equivalent	-

Days to Ship: 10 Day(s) or more

10 Day(s) or more

You can add up to 6 items per a category to the compare list. Compare

Ball Splines - One End Stepped and Threaded

MISUMI

ball spline with a stepped male thread on one end. This standard enables highly accurate linear motion and rotational torque transmission. In addition, the contact area between the ball groove machined into the shaft and the steel ball is large, resulting in a large load capacity and long life. Even a single axis can be used as a linear motion guide, allowing for a compact design.
A dustproof seal is attached to the nut, so the ball will not fall off even if the spline shaft is removed.

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Key Provided Type / Flanged Type	6 ～ 30.8	Solid	Standard	25 ～ 80	14 ～ 47	Standard	Standard Grade	Stepped and Threaded	Standard	Middle Torque	SUS440C Equivalent / SUJ2 Equivalent	-

Days to Ship: 10 Day(s) or more

10 Day(s) or more

Economy series

You can add up to 6 items per a category to the compare list. Compare

Ball Splines Round Flanged, One End Double Stepped and Threaded / One End Tapped

MiSUMi Economy

Ball Splines Round Flanged, One End Double Stepped and Threaded / One End Tapped

MiSUMi Economy

MISUMI

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Flanged Type	8 ～ 30	Solid	-	-	-	-	-	Stepped and Threaded	Tapped	-	SUJ2 Equivalent	-

Days to Ship: 11 Day(s)

11 Day(s)

Economy series

You can add up to 6 items per a category to the compare list. Compare

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

MiSUMi Economy

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

MiSUMi Economy

MISUMI

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Flanged Type	8 ～ 30	Solid	-	-	-	-	-	Stepped and Threaded	Tapped	-	SUJ2 Equivalent	-

Days to Ship: 11 Day(s)

11 Day(s)

Economy series

You can add up to 6 items per a category to the compare list. Compare

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

MiSUMi Economy

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

MiSUMi Economy

MISUMI

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Flanged Type	8 ～ 30	Solid	-	-	-	-	-	Stepped and Threaded	Standard	-	SUJ2 Equivalent	-

Days to Ship: 11 Day(s)

11 Day(s)

Economy series

You can add up to 6 items per a category to the compare list. Compare

Ball Splines Round Flanged, One End Double Stepped and Threaded

MiSUMi Economy

Ball Splines Round Flanged, One End Double Stepped and Threaded

MiSUMi Economy

MISUMI

CAD ：: 2D / 3D

Nut Type	Spline Shaft Outer Dia. D(Ø)	Type	Nut Length	Nut Overall Length L1(mm)	Nut Outer Dia. D1(Ø)	Preload	Accuracy Grade	End Shape (Left)	End Shape (Right)	Torque	Shaft material	Number of Nuts(pc(s).)
Flanged Type	8 ～ 30	Solid	-	-	-	-	-	Stepped and Threaded	Standard	-	SUJ2 Equivalent	-

Days to Ship: 11 Day(s)

11 Day(s)


Brand
Product Series
CAD
From
Days to Ship
Nut Type
Spline Shaft Outer Dia. D(Ø)
Type
Nut Length
Nut Overall Length L1(mm)
Nut Outer Dia. D1(Ø)
Preload
Accuracy Grade
End Shape (Left)
End Shape (Right)
Torque
Shaft material
Number of Nuts(pc(s).)

	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare
Brand	MISUMI	MISUMI	MISUMI	MISUMI MiSUMi Economy	MISUMI MiSUMi Economy	MISUMI MiSUMi Economy	MISUMI MiSUMi Economy
Product Series	Ball Splines - Both Ends Stepped and Threaded	Ball Splines - One End Stepped and Threaded, One End Tapped	Ball Splines - One End Stepped and Threaded	Ball Splines Round Flanged, One End Double Stepped and Threaded / One End Tapped	Ball Splines Key Provided Straight Nut, One End Double Stepped and Threaded / One End Tapped	Ball Splines Key Provided Straight Nut, One End Double Stepped and Threaded	Ball Splines Round Flanged, One End Double Stepped and Threaded
CAD	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D
From
Days to Ship	10 Day(s) or more	10 Day(s) or more	10 Day(s) or more	11 Day(s)	11 Day(s)	11 Day(s)	11 Day(s)
Nut Type	Key Provided Type / Flanged Type	Key Provided Type / Flanged Type	Key Provided Type / Flanged Type	Flanged Type	Flanged Type	Flanged Type	Flanged Type
Spline Shaft Outer Dia. D(Ø)	6 ～ 30.8	6 ～ 30.8	6 ～ 30.8	8 ～ 30	8 ～ 30	8 ～ 30	8 ～ 30
Type	Solid	Solid	Solid	Solid	Solid	Solid	Solid
Nut Length	Standard	Standard	Standard	-	-	-	-
Nut Overall Length L1(mm)	25 ～ 80	25 ～ 80	25 ～ 80	-	-	-	-
Nut Outer Dia. D1(Ø)	14 ～ 47	14 ～ 47	14 ～ 47	-	-	-	-
Preload	Standard	Standard	Standard	-	-	-	-
Accuracy Grade	Standard Grade	Standard Grade	Standard Grade	-	-	-	-
End Shape (Left)	Stepped and Threaded	Stepped and Threaded	Stepped and Threaded	Stepped and Threaded	Stepped and Threaded	Stepped and Threaded	Stepped and Threaded
End Shape (Right)	Stepped and Threaded	Tapped	Standard	Tapped	Tapped	Standard	Standard
Torque	Middle Torque	Middle Torque	Middle Torque	-	-	-	-
Shaft material	SUS440C Equivalent / SUJ2 Equivalent	SUS440C Equivalent / SUJ2 Equivalent	SUS440C Equivalent / SUJ2 Equivalent	SUJ2 Equivalent	SUJ2 Equivalent	SUJ2 Equivalent	SUJ2 Equivalent
Number of Nuts(pc(s).)	-	-	-	-	-	-	-

Configure

Specification/Dimensions

Spline Shaft Outer Dia. D(Ø)
6

8

10

10.4

12

13

13.4

16

16.6

20

20.6

25

25.8

30

30.8
Clear

Type
- Solid
- Hollow
- Polygonal
Clear

Nut Length
- Standard
Clear

Nut Overall Length L1(mm)
11.5

17.5

25

33

36

40

44

50

63

71

80
Clear

Nut Outer Dia. D1(Ø)
10

14

16

21

24

31

35

42

47
Clear

Preload
- Standard
See the accuracy standard of each manufacturer.

Clear

Accuracy Grade
- Standard Grade
See the accuracy standard of each manufacturer.

Clear

End Shape (Left)
- Standard
- Tapped
- Stepped
- Stepped and Tapped
- Stepped and Threaded
Larger Image

Clear

End Shape (Right)
- Standard
- Tapped
- Stepped
- Stepped and Tapped
- Stepped and Threaded
Larger Image

Clear

Torque
- Middle Torque
Clear

Shaft material
- SCM415 Equivalent
- SUS440C Equivalent
- SUS304
- SUJ2 Equivalent
Clear

Number of Nuts(pc(s).)
1

2
Clear

Related Categories to Spline Shaft

FAQ Spline Shaft

Question: What are spline shafts and their primary function in linear motion?: Answer: Spline shafts are cylindrical rods with ridges or teeth along their length, known as splines. Their primary function in linear motion is to convert rotational motion into smooth and precise linear movement. These splines engage with complementary components to transmit torque efficiently, ensuring controlled motion without slipping or backlash. Spline shafts are crucial in various machinery applications where accurate linear motion is required, such as moving heavy loads or guiding tools with precision, providing reliable and efficient motion control.
Question: Can you explain the key characteristics of square splines?: Answer: Square splines feature square-shaped ridges and slots, offering efficient torque transmission and precise alignment. Their design allows for high torque capacity and compatibility with various mating components. Due to their simplicity of manufacture, they are cost-effective for many applications. Additionally, the even distribution of wear along the mating surfaces enhances durability. Square splines are widely used in industrial and mechanical systems where accurate motion control and reliable torque transmission are essential.
Question: What role do spline shafts play in automotive transmissions?: Answer: Spline shafts are essential in automotive transmissions for transferring power from the engine to the wheels. They connect parts like the clutch and gears, ensuring smooth power transmission. By enabling the engine's rotational motion to move the wheels with precision, they allow the vehicle to accelerate, decelerate, and shift gears seamlessly. Essentially, spline shafts ensure that your car moves smoothly and efficiently, contributing to its overall performance and driving experience.
Question: What factors should be considered when choosing a spline shaft?: Answer: When selecting a spline shaft, it's important to consider factors like the application's torque, speed, and precision requirements. Choose a spline profile and dimensions that match mating components to ensure efficient power transmission. Material selection is key for strength and corrosion resistance. The surface finish impacts durability, while manufacturing methods and costs should be evaluated. Supplier reliability is also crucial. By carefully considering these factors, you can choose a spline shaft that meets your application's needs effectively, ensuring optimal performance and longevity.
Question: What materials are commonly used for manufacturing spline shafts?: Answer: Spline shafts are commonly made from materials like steel, aluminum, brass, bronze, titanium, and plastics. Steel offers strength and durability, while aluminum is lightweight. Brass and bronze provide corrosion resistance. Titanium is strong and corrosion-resistant, ideal for demanding environments. Plastics offer benefits like low friction and electrical insulation. The choice depends on factors such as strength, corrosion resistance, weight, and cost.
Question: What are the maintenance requirements for spline shafts?: Answer: Maintaining spline shafts involves regular checks for wear, damage, and corrosion. Keep them lubricated to reduce friction and ensure smooth operation. Clean them regularly to prevent dirt buildup. Properly align mating components to avoid unnecessary stress on the shafts. Promptly replace any worn or damaged shafts to prevent further issues. Protect spline shafts from harsh environments and store them correctly when not in use. Following these steps will help ensure the longevity and efficient performance of spline shafts in machinery and equipment.
Question: How do nut types of influence spline shaft functionality?: Answer: The type of nut used can significantly affect spline shaft functionality. Slotted nuts provide anti-rotation, ensuring the nut and shaft move together for enhanced torque transmission. Hex nuts offer stability with six sides but lack anti-rotation features. Lock nuts prevent unintentional loosening, employing mechanisms like nylon inserts or serrations. Flange nuts distribute load over a wider area with a built-in washer-like flange. Self-locking nuts have integrated locking features to prevent loosening due to vibrations or external forces. Each type suits specific applications based on torque requirements, environmental conditions, and space constraints.

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Spline Shaft（End Shape (Left)：Stepped and Threaded）

Configure

Specification/Dimensions

Spline Shaft Outer Dia. D(Ø)

Type

Nut Length

Nut Overall Length L1(mm)

Nut Outer Dia. D1(Ø)

Preload

Accuracy Grade

End Shape (Left)

End Shape (Right)

Torque

Shaft material

Number of Nuts(pc(s).)

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FAQ Spline Shaft

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