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4-Station Bolt Former/Cold forging machine

The KRBF Series 4-Station Cold Heading Machine is a high-efficiency and precision bolt former designed for mass production of medium-complexity bolts. This cold forging machine is widely used in the manufacturing of fasteners for the automotive, machinery, and agricultural equipment industries. Equipped with four stations, the bolt making machine sequentially performs cutting, preforming, heading, and finishing processes, ensuring accurate dimensions, stable forming, and consistent product quality.

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Swing Pneumatic Clamp

Digital Servo Motor

Clutch

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Pneumatic clamp

Air Compression SystemCut Off Mechanism

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Main slider

Rear-exit mechanism

 Cylinder Controlled Pawl Mechanism

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Straightening Machine

Fuel supply




1. Machine frame: QT500-7 nodular cast iron 

2. Main slide: QT600-3 nodular cast iron – through quenched & tempered; high-frequency hardened on both side faces 

3. Main crankshaft: 42CrMo forged steel – quenched & tempered, plasma nitrided to 58–60 HRC 

4. Cams, rollers & guide rails: SKD-11 (D2) tool steel – vacuum through-hardened 

5. Gripper plates: aerospace-grade 7075-T6 aluminium – hard-anodised 

6. Wear-resistant components: 38CrMoAl nitriding steel – gas nitrided 

7. Bearing bushes inserts: tin-bronze ZCuSn10P1 (CC480K) 

8. Inverter: InvT, Raynen, Inovance or Schneider (customer-selectable option) 

9. PLC & HMI with USB port: Inovance brand 

10. Bearings: NSK IKO (Japan), 100 % imported 

11. Lubrication pump: Chyn Tien (Taiwan), internationally interchangeable 

12. Main motor: Liu’an or Wannan (China), domestically interchangeable 

13. Over-running clutch: domestic first-tier brand (optional) 

14. Clutch solenoid valve: SMC (Japan) 

15. All springs: Tohatsu (Japan) 

16. Standard upset-force anomaly detection system (industry-leading in China) 

17. Fasteners: grade 12.9 high-tensile bolts throughout

Well-suited for mid-complexity fasteners in industries like automotive components, machine building, and agricultural equipment, where a balance of precision and productivity is essential.

Suitable products such as: Construction Screw, Hex Head Bolt, Cap Screw, Flange bolt, Socket Bolts, Concrete screw bolts, Expansion Bolt, Roofing screws, Connecting Rods, Joint Connector screw, Timber Screw, carpenter screws, Elevator Bolts, Anchor Bolts, Concrete Screws, etc.

Actual Product Image

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This machine can produce various special-shaped fasteners.

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Performance Advantages of Cold Heading Machine

High Precision

Rigid body and precision guiding system ensure die alignment, dimensional stability, and minimal secondary machining.

High Efficiency

Multi-station forming completes cutting, upsetting, extrusion,and heading in one cycle; speeds reach hundreds of pieces per minute.

Wide Material Compatibility

Processes carbon steel, stainless steel, alloy steel,copper, aluminum, and more; die design adapts to different materials.

Energy Saving & Material Efficiency

Cold forming reduces energy use, improves material efficiency, and minimizes waste.

Stability & Durability

Integrally cast body, high-strength components, and imported bearings ensure low vibration and long service life.

Intelligent Control

PLC system with touch screen allows easy operation, real-time monitoring, fault detection, and automation integration.

Easy Maintenance

Modular design enables fast die changes, precise installation, and convenient upkeep.

High Flexibility & Customization

Customizable stations, stroke lengths, dies, and feeding systems; supports non-standard parts; optional automation modules.


Automotive:Manufacturing bolts, nuts, pins, and other critical components.

Motorcycle & EV:Lightweight, high-strength fasteners suitable for high-vibration applications.

Aerospace:Precision bolts and rivets with high reliability.

Shipbuilding:Corrosion-resistant fasteners and connectors.

Machinery:Mass production of machine components and hardware.

Construction & Hardware:Production of bolts, anchors, and standard fasteners.

Electronics & Appliances:Miniature screws and connectors with precise dimensions.

Non-standard Custom Parts:Special-shaped parts manufactured according to drawings or samples.


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