Description
Technical Parameters
Rail Screw Spike Fastening System
The screw spike is a threaded fastener that rotates into a plastic or wooden dowel pre-installed in concrete sleepers. It features a square or hexagonal head for wrench application and a tapered threaded shank. Made from heat-treated carbon steel, it provides both clamping force and pull-out resistance. It is standard for concrete sleeper track systems worldwide.
Technical Specifications:
| Parameter | Standard Requirement | Typical Value |
|---|---|---|
| Material grade | Medium carbon steel | C45 / 1045 / 40Cr |
| Heat treatment | Quenched and tempered | 25 – 35 HRC |
| Thread type | Coarse pitch | ISO metric or UNC |
| Thread diameter | Major dimension | 20 mm – 24 mm |
| Thread length | Engaged portion | 40 mm – 60 mm |
| Head type | Wrench interface | Square 22mm / Hex 24mm |
| Pull-out strength | Minimum resistance | 30 kN – 50 kN |
| Plastic dowel type | Pre-installed sleeve | Nylon 6 / Polyamide |
Installation & Maintenance Perspective:
- Pre-installed plastic dowel receives screw spike without damaging concrete threads
- Calibrated torque wrench ensures correct clamping force each installation
- No hammer impact means zero risk of concrete sleeper cracking around hole
- Thread lubricant reduces friction allowing consistent torque application
- Power tool installation achieves 100 to 150 spikes per hour per worker
Maintenance & Operational Perspective
- Thread engagement length of 40mm provides pull-out resistance exceeding 30kN
- No loss of clamping force from wood shrinkage or fiber crushing over time
- Withdrawal resistance remains constant throughout concrete sleeper service life
- Thread crests cold-form plastic dowel creating tight interference fit
- Resists loosening from vibration better than any driven fastener type
Gnee Professional supplier
Hot Tags: heavy steel screw soikes, China heavy steel screw soikes manufacturers, suppliers, factory, small scale rail spikes production, cost effective rail spikes, economical rail spikes, affordable rail spikes, railway spikes workshop, large scale rail spikes production
