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Linear Shafts

Linear shafts—also known as precision shafting or linear motion shafts—are essential components in machinery requiring accurate, low-friction linear movement. Made from high-grade materials such as GCr15 (SUJ2), SUS440C, or S45C, these shafts are precision ground and surface hardened to ensure exceptional straightness, wear resistance, and durability.

Why Choose Our Linear Shafts?

✅ ISO standard compliant
✅ OEM & customized dimensions available
✅ Quick lead time & global shipping
✅ Technical drawing & support included

Showing 65–80 of 119 results

  • Linear Shaft / Standard Grade / Both Ends External Thread (Same Diameter) / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends External Thread (Same Diameter) / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~30
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends External Thread (Standard Type) / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends External Thread (Standard Type) / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends External Thread with Wrench Flat / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends External Thread with Wrench Flat / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends Stepped / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends Stepped / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends Stepped & External Thread / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends Stepped & External Thread / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends Stepped & Tapped / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends Stepped & Tapped / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends Tapped / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends Tapped / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 6~30
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Both Ends Tapped with Hex Hole / D Tolerance f8

    Linear Shaft / Standard Grade / Both Ends Tapped with Hex Hole / D Tolerance f8

    Main materials: 45 (S45C)
    Middle shaft diameter: 6~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: Both Ends Stepped – Right: Both Ends Stepped

    Linear Shaft / Standard Grade / Left: Both Ends Stepped – Right: Both Ends Stepped

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8-50
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: Both Ends Stepped & External Thread – Right: Both Ends Stepped & External Thread

    Linear Shaft / Standard Grade / Left: Both Ends Stepped & External Thread – Right: Both Ends Stepped & External Thread

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8-50
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: Both Ends Stepped & Tapped – Right: Both Ends Stepped & Tapped

    Linear Shaft / Standard Grade / Left: Both Ends Stepped & Tapped – Right: Both Ends Stepped & Tapped

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8-50
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: Both Ends Stepped, Tapped with Hex Hole – Right: Both Ends Stepped, Tapped with Hex Hole

    Linear Shaft / Standard Grade / Left: Both Ends Stepped, Tapped with Hex Hole – Right: Both Ends Stepped, Tapped with Hex Hole

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8-50
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: External Thread – Right: Tapped

    Linear Shaft / Standard Grade / Left: External Thread – Right: Tapped

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 4-50
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: External Thread (Same Diameter) – Right: External Thread (Same Diameter)

    Linear Shaft / Standard Grade / Left: External Thread (Same Diameter) – Right: External Thread (Same Diameter)

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 3-30
    Shaft full length: 20～1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: External Thread with Relief Groove – Right: External Thread with Relief Groove

    Linear Shaft / Standard Grade / Left: External Thread with Relief Groove – Right: External Thread with Relief Groove

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
  • Linear Shaft / Standard Grade / Left: External Thread with Relief Groove – Right: Tapped with Relief Groove

    Linear Shaft / Standard Grade / Left: External Thread with Relief Groove – Right: Tapped with Relief Groove

    Main materials: GCr15 (SUJ2), 9Cr18 (SUS440C)
    Middle shaft diameter: 8~50
    Shaft full length: 20~1500
    Surface treatment: Hard chromium plating
    Heat treatment: High-frequency quenching

    Read moreContinue Loading Done
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What Are the Advantages of GUNRI Linear Shafts

Linear shafts are ideal for systems requiring accurate linear motion and smooth operation. Here’s why:

  • High surface hardness ensures wear resistance

  • Ground finish improves motion smoothness

  • Low friction coefficient with linear bearings

  • Corrosion-resistant coatings available (hard chrome, electroless nickel)

  • Compatible with CNC machines, 3D printers, robot arms, etc.

Types and Applications of Linear Shafts

We offer a wide variety of linear shafts to suit different use cases:

Type Diameter Range Length Range Application
Hardened Linear Shafts 3–50mm up to 1500mm Automation, packaging, robotics
Chrome Plated Shaft Rods 6–50mm 20–1500mm CNC guides, pick-and-place systems
Stainless Steel Linear Shafts 4–30mm 20–1200mm Food-grade & medical machinery
Precision Hollow Shafts 8–30mm 100–1000mm Weight-sensitive motion systems
 

Industries Served: Automotive assembly lines, textile machinery, semiconductor equipment, medical devices, and more.

How To Choose the Right Linear Shaft

Choosing the correct linear shaft depends on several factors:

  1. Load Capacity – heavier loads require larger diameters and hardened materials

  2. Motion Requirements – precision ground shafts for smooth, repeatable motion

  3. Environment – select stainless steel for corrosive or clean-room conditions

  4. Mounting Style – solid, hollow, support rail types

  5. Shaft End Machining – threads, tapped holes, circlip grooves available

➡️ Use our shaft selector guide or contact our engineering team for support.

Surface Compatibility and Resistance of Linear Shafts

Our shafts undergo hard chrome plating, high-frequency induction hardening, or electroless nickel plating to meet your durability needs:

  • Hard Chrome Plating: 20–25μm layer, 900+ HV hardness

  • Induction Hardened Shaft: Surface HRC58–65, core toughness retained

  • Corrosion Resistance: 9Cr18 (SUS440C) for marine and chemical environments

  • Compatible with linear bushings, LM guides, and slide bearings

Difference Between Linear Shaft and Rotary Shaft

Feature Linear Shaft Rotary Shaft
Motion Type Linear (reciprocating) Rotational
Tolerance IT6–IT7 (high precision) IT7–IT9
Surface Treatment Chrome-plated or nitrided Often raw or coated
Application Linear guides, automation Motors, spindles
 

While rotary shafts rotate within bearings, linear shafts are designed for smooth axial movement, often with ball bushings or sleeve bearings.

Our Factory

Located in Dongguan, one of China’s most advanced machining hubs, our facility is equipped with:

  • CNC lathes & grinding machines

  • Automated chrome plating lines

  • In-house hardness testing & surface roughness testing

  • Clean storage & packaging for export

  • OEM & custom linear shaft solutions available

We are ISO-certified and serve clients worldwide.

FAQ

Q1: What’s the difference between a hardened shaft and a chrome plated shaft?
A: Hardened shafts have high surface strength through heat treatment, while chrome plated shafts add corrosion resistance and reduce friction. Most of our shafts are both hardened and plated.

Q2: Can I get a custom linear shaft with end machining?
A: Yes. We provide OEM linear shafts with custom end machining, including tapped holes, circlip grooves, flat milling, and threading.

Q3: What tolerances do your shafts support?
A: Standard tolerance is g6/h6, but we can offer h7, h8 or customized based on application. For precision linear shafting, straightness can be < 0.02mm per 300mm.

Q4: What is the maximum length you can manufacture?
A: For most shaft types, we support up to 1500mm in a single piece. For longer shafts, we can offer coupling solutions.

Q5: What is the MOQ for linear shafts?
A: We support low MOQ orders, even as low as 5 pieces for stock models. For special customization, MOQ may vary.

Q6: Do your shafts fit standard linear bearings?
A: Yes. Our shafts are compatible with LM and LME series bearings (e.g. LM10UU, LMK12UU), and precision linear motion systems.

Q7: What materials are available?
A: GCr15 (SUJ2), 9Cr18 (SUS440C), S45C. Stainless types are best for corrosion resistance; carbon steel types are ideal for high-load and cost-sensitive projects.

Q8: Can you ship internationally?
A: Absolutely. We ship to Europe, the US, Southeast Asia, and the Middle East. Support includes DDP, DAP, EXW, and FOB terms.

CONTACT

Email：milla@gunri.com.cn

WhatsApp:+8618929233070

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