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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THK Spline Shaft

Spline Shaft products in the Automation Components category from THK. The product can be selected based on many product specifications such as Nut Type, Type, Nut Length, Nut Overall Length L1, Nut Outer Dia. D1. THK offers products around 2 items and the product specifications can easily be compared. Search and select detailed specifications of parts for your machine with free CAD downloads. THK products are available to order through MISUMI online 24 hours a day. Free shipping, no minimum order.

Configure

Specification/Dimensions

Spline Shaft Outer Dia. D(Ø)
6

8

10

10.4

12

13

13.4

16

16.6

18.2

20

20.6

23

25

25.8

28

30

30.8

37.4

40
Clear

Type
- Solid
- Hollow
- Hollow (Thin)
- Polygonal
Clear

Nut Length
- Standard
- Long
Clear

Nut Overall Length L1(mm)
11.5

17.5

25

33

36

40

44

50

60

63

70

71

80

100

122

125
Clear

Nut Outer Dia. D1(Ø)
10

14

16

21

24

31

32

35

37

42

45

47

60

64

80
Clear

Preload
- Standard
- Light Preload
- Medium Preload
See the accuracy standard of each manufacturer.

Clear

Accuracy 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
- High Torque
- Middle Torque
Clear

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

Number of Nuts(pc(s).)
1

2

3

4

5
Clear

Nut Type	Key Provided Type Flanged Type Block Type
Brand	(30) (20) MIYOSHI KIKAI (1) NIPPONBEARING (4) NSB (1) OZAK (1) THK (2)
Filter By	All Sale Items
CAD	2D 3D
Days to Ship	All Same day 3 Day(s) or Less 5 Day(s) or Less 7 Day(s) or Less 8 Day(s) or Less Others

2 items

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: 30; 60; 90

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Until 31/03/2025

Spline Nut

THK

The nut and shaft are sold separately. Use THK nut and shaft (DPM, DP, SS) as a set. No surface treatment is given to the cut shaft ends.
[Features]
· The spline nut DPM type / DP type is a low-priced bearing where a special alloy has been die-cast with a high-accuracy splint shaft as the core.
· Unlike conventional machined products, the sliding surface retains a chill layer formed during casting, which is superior in abrasion-resistance.
· The combined spline shaft surface is machined and hardened by rolling, and also the surface is mirror finished, resulting in smooth sliding.
· The spline cog has a special design with a large contact area and has concentricity that can automatically determine the core when torque is incurred, so the torque transmission is stable.
· Special rolling shaft features: Spline nut is provided with a dedicated rolling shaft of standard length.
· Improved abrasion-resistance: Cold rolled tooth shaft with tooth surface hardened to 250 HV or more and finished to a smooth mirror finish for superior abrasion-resistance. Extremely smooth movement when used in combination with nuts.
· Improved mechanical properties: Because of the internal tooth structure of the rolled shaft, the fiber flow occurs along the tooth contours for tight rooted teeth with greater endurance strength.
· Alteration of shaft end support: The rolled shaft with altered shaft end support bearing part is easier to use in turning and milling.

From: ฿ 552.00
Special Price
Days to Ship: Same day

Same day

Compare

Medium-Torque Type, Flange Type Ball Spline, LF Type

THK

[Features]
· Easy to assemble because it can be fixed by bolts to the housing using the flange.
· Ideal for housings with small widths or where there are concerns of deformation associated with machining keyway into the housing.

Days to Ship: 19 Day(s)

19 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 Until 31/03/2025	You can add up to 6 items per a category to the compare list.Compare
Brand	THK	THK
Product Series	Spline Nut	Medium-Torque Type, Flange Type Ball Spline, LF Type
CAD	2D / 3D	2D / 3D
From	฿ 552.00 Special Price On Sale Until 31/03/2025
Days to Ship	Same day	19 Day(s)
Nut Type	-	Flanged Type
Spline Shaft Outer Dia. D(Ø)	-	-
Type	Polygonal	Solid / Hollow / Hollow (Thin)
Nut Length	-	Standard
Nut Overall Length L1(mm)	-	125
Nut Outer Dia. D1(Ø)	-	80
Preload	-	Standard / Light Preload / Medium Preload
Accuracy Grade	-	Standard Grade / High Grade / Precision Grade
End Shape (Left)	Standard	Standard
End Shape (Right)	Standard	Standard
Torque	-	Middle Torque
Shaft material	-	-
Number of Nuts(pc(s).)	-	1 ～ 5

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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.