Product Specifications
| Model / Specification | 2×40 - 8×150 |
| Material | Spring Steel |
| Spec. | 2×40 | 3×70 | 4×75 | 5×105 | 6×115 | 7×150 | 8×150 | |
| d | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| d1 | 9 | 13 | 19 | 26 | 31 | 36 | 35 | |
| d2 | Min. | 9 | 12 | 15 | 18 | 24 | 34 | 40 |
| Max. | 12 | 18 | 22 | 24 | 35 | 58 | 55 | |
| L | Min. | 41 | 67 | 75 | 105 | 117 | 150 | 150 |
| Max. | 44 | 70 | 78 | 108 | 120 | 153 | 153 | |
| L1 | ≈ | 23 | 40 | 50 | 65 | 70 | 108 | 88 |
Lock Pins and Spring Pins for Agricultural and Forestry Tractors and Implements (R-type Pin) — Product Introduction
The R-type pin is manufactured according to GB/T 4329—2001 (identical to ISO 7072:1993). It is an elastic lock pin with an “R” shape. It is mainly used to lock cylindrical pins, connecting pins or shaft parts to prevent axial movement or falling off during use. During installation, the R-type pin is inserted into the radial hole at the end of the pin shaft and is secured by its own elastic restoring force. It is easy to install and remove and is a commonly used locking element in agricultural and forestry tractors and implements.
1. Product Features
• Standard structure: Dimensions and shape conform to GB/T 4329—2001, fit well with standard pin shaft holes, and offer good interchangeability.
• R-shaped design: The unique R-shaped bent structure reliably locks the pin shaft after insertion and is not easy to come out.
• Good elasticity: It has stable elasticity and can still maintain clamping force after repeated assembly and disassembly.
• Easy assembly and disassembly: Generally no special tools are required; it can be quickly installed and removed by hand or with simple tools.
• Complete specifications: Various diameter and length specifications meet different pin shaft locking requirements.
2. Product Advantages
• Reliable locking: It relies on elastic clamping, resists vibration and impact, and effectively prevents the pin shaft from loosening.
• Fast operation: Quick installation and removal improve assembly and maintenance efficiency.
• Reusable: Durable elasticity, not easily deformed, can be assembled and disassembled multiple times, reducing use cost.
• Good adaptability: Suitable for various connecting structures with radial holes at the end of the pin shaft.
• Economical and practical: Simple structure and low manufacturing cost make it suitable for mass use.
3. Scope of Application
R-type pins are widely used for pin shaft locking in agricultural and forestry tractors and implements, and are also suitable for anti-loosening of connecting pins in other mechanical equipment, including:
• Agricultural machinery: Hitch parts of tractors, plows, harrows, seeders, harvesters, etc.
• Forestry machinery: Forestry tractors, skidders, brush cutters, etc.
• Construction machinery: Attachment connections for small loaders, excavators, bulldozers, etc.
• Transport machinery: Pin shaft locking for agricultural trailers, trailers, etc.
• General machinery: Various pin shaft connection points requiring quick assembly and disassembly.
