Linear Motion Shaft Information
Linear motion shafts are precision-engineered components designed for smooth and accurate linear movement in automated systems. They are widely used in industries such as CNC machinery, industrial robots, precision printers, special cylinder rods, and automatic plastic-wood machines.
Key features of linear motion shafts include:
- High Precision: Manufactured to tight tolerances to ensure smooth linear motion.
- Durability: Made from high-quality materials such as GCr15 bearing steel, carbon steel, or stainless steel, ensuring long service life.
- Versatile Types: Available as solid, hollow, threaded, or tapped shafts to suit various applications.
- Support Options: Can be used with linear bearings and guide systems for enhanced stability.
- Customizable Sizes: Outer diameters ranging from 3 mm to 150 mm and lengths from 1000 mm to 7000 mm are available.
Linear motion shafts are essential components in industrial automation and precision equipment, providing reliable performance and extending the lifespan of machinery.
For more details on linear shafts, click here to explore our full range of products.
Linear Motion Shaft Material & Technical Specifications
- Material: GCr15 (Bearing Steel)
- Hardness: HRC 62 ± 2
- Precision (Tolerance): h6 / h7 / g6
- Surface Roughness: Ra 0.4 – 0.8 μm
- Hardening Layer Depth: 0.6 mm – 3.5 mm
- Available Length: 1000 mm – 7000 mm
- Straightness: ≤5 μm per 100 mm
Types
Conventional Shafts:
WCS – Bearing Steel
WFS – High Carbon Steel
WAG – Stainless Steel
Standard Chrome-Plated Shafts:
WDCS – Bearing Steel
WDFS – High Carbon Steel
Soft Shafts:
WECS – Bearing Steel (Soft Shaft)
WEFS – High Carbon Steel (Soft Shaft)
Linear Motion Shaft Parameter
Type |
Outer diameter | Roundness φ1(μm) |
Effective Hardness Layer Depth | Weight (kgf/m) |
Standard Length(mm) | ||||||||||||||||||||
| D | Tolerance (g6) |
100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 1500 | 1800 | 2000 | 2500 | 3000 | 3500 | 4000 | 5000 | 6000 | ||||
| WDCS 3 | 3 | -0.002 -0.008 |
≤2 | 0.6 | 0.06 | ||||||||||||||||||||
| WDCS 4 | 4 | -0.004 -0.012 |
≤3 | 0.8 | 0.10 | ||||||||||||||||||||
| WDCS 5 | 5 | 0.15 | |||||||||||||||||||||||
| WDCS 6 | 6 | 0.22 | |||||||||||||||||||||||
| WDCS 8 | 8 | -0.005 | 1 | 0.40 | |||||||||||||||||||||
| WDCS 10 | 10 | -0.014 | ≤4 | 0.62 | |||||||||||||||||||||
| WDCS 12 | 12 | -0.006 -0.017 |
0.89 | ||||||||||||||||||||||
| WDCS 13 | 13 | 1.04 | |||||||||||||||||||||||
| WDCS 16 | 16 | 1.5 | 1.58 | ||||||||||||||||||||||
| WDCS 20 | 20 | -0.007 -0.020 |
≤5 | 2.47 | |||||||||||||||||||||
| WDCS 25 | 25 | 3.85 | |||||||||||||||||||||||
| WDCS 30 | 30 | 2 | 5.55 | ||||||||||||||||||||||
| WDCS 35 | 35 | -0.009 -0.025 |
≤6 | 7.55 | |||||||||||||||||||||
| WDCS 40 | 40 | 2.5 | 9.87 | ||||||||||||||||||||||
| WDCS 50 | 50 | 15.40 | |||||||||||||||||||||||
| WDCS 60 | 60 | -0.01 | ≤8 | 3 | 22.20 | ||||||||||||||||||||
| WDCS 80 | 80 | -0.029 | 39.50 | ||||||||||||||||||||||
| WDCS100 | 100 | -0.012 -0.034 |
≤10 |
3.2 | 61.70 | ||||||||||||||||||||
| WDCS120 | 120 | 88.80 | |||||||||||||||||||||||
| WDCS150 | 150 | -0.014 -0.039 |
≤12 | 3.5 | 139.00 | ||||||||||||||||||||
Note:
- The factories marked with colored ■ can provide all lengths of the specified sizes. Products are available in materials such as 20CrMo, 40CrMo, etc.
- The standard material is bearing steel; upon customer request, the material can also be changed to 45# steel, high-carbon steel, 40CrMo, or stainless steel. However, the surface hardness will vary accordingly.
- If a hard chrome-plated shaft is required, please indicate it on the order form.
- If the customer requires threaded holes at both ends or other mating dimensions, please specify them in the technical requirements or on the order drawing.
- WDP hollow shafts are also available.
Classification of Linear Motion Shafts
Standard Linear Motion Shaft
Standard linear motion shafts are designed to work in point contact with linear bearings. Therefore, they require a high surface hardness. As a result, material selection and heat treatment processes are extremely important.
01
Chrome-Plated Linear Motion Shaft
Chrome-plated linear motion shafts are manufactured by applying a hard chrome coating to standard linear motion shafts. They are suitable for use in environments where corrosion or rust is likely to occur.
02
Chrome-Plated Soft Shaft
Chrome-plated soft shafts feature a relatively thick chrome layer, allowing them to be directly used with precision piston rods and certain self-lubricating bearings. Due to their moderate hardness, they are widely used in various industrial applications.
03
Chrome-Plated Hollow Shaft
Chrome-plated hollow shafts adopt a hollow structural design, which significantly reduces weight and simplifies the overall structure. The hollow interior allows for routing measurement cables, compressed air combined with lubricating oil, or integration into robotic arms.
04
Stainless Steel Linear Shaft
Stainless steel linear shafts offer excellent corrosion resistance, high strength, and wear resistance, while maintaining stable operating performance. They are widely used in environments prone to oxidation, such as water, chemicals, steam, and seawater applications.
05
Linear Motion Shaft Applications
DIY 3D Printing Projects
CNC Machine
Packaging Machinery
DLY Linear Motion Shaft Display
About DLY
DLY is a manufacturing factory with over 20 years of experience in the linear motion industry. All of our linear motion shafts are produced in our own factory, allowing us to fully control material selection, machining processes, heat treatment, and quality inspection. Thanks to in-house production, DLY can flexibly meet different customer requirements, including customized lengths, materials, surface treatments, and precision grades.
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