Spring Pins
ISO 8752 (Slotted / Roll Pins)
Self-Retaining Pins for Dynamic & Precision Assemblies
Manufacturer & Exporter: Super Industries India
1. What Is ISO 8752?
ISO 8752 specifies slotted spring pins (also called roll pins) designed to:
- Fit into drilled holes
- Compress during insertion
- Expand radially to lock themselves in place
Unlike solid dowel pins, ISO 8752 pins do not require tight tolerances.
2. Why Engineers Choose ISO 8752 Pins
ISO 8752 pins are preferred because they:
✔ Absorb vibration
✔ Compensate for hole tolerance
✔ Maintain retention under dynamic load
✔ Are easy to install and remove
They act as both:
- Fasteners
- Alignment components
3. ISO 8752 vs Solid Dowel Pins
| Feature | Solid Pins | ISO 8752 Spring Pins |
|---|---|---|
| Retention | Interference fit | Self-locking |
| Vibration resistance | Low | High |
| Hole tolerance | Tight | Flexible |
| Shock absorption | ❌ | ✔ |
4. Design & Geometry
Key features:
- Cylindrical body
- Longitudinal slot
- Chamfered ends for easy insertion
- Uniform spring force along length
5. Working Principle (Engineering View)
When inserted:
- Pin compresses at slot
- Radial spring force develops
- Pin presses against hole wall
- Friction + elasticity secure the pin
This ensures:
- No loosening
- No backing out
- No additional locking required
6. Dimensional Range
Typical sizes:
- Diameter: 1.5 mm to 16 mm
- Length: 4 mm to 100 mm
Super Industries India manufactures custom lengths and diameters on request.
7. Materials Offered
- Carbon steel
- Alloy steel
- Stainless steel (AISI 304 / 316)
- Spring steel grades
Material selection depends on:
- Load
- Environment
- Corrosion resistance
8. Heat Treatment & Hardness
ISO 8752 pins are:
- Heat treated
- Spring tempered
Typical hardness:
HRC 44–51 (application dependent)
9. Surface Finishes
- Plain / oiled
- Zinc plated
- Black oxide
- Stainless steel (natural finish)
10. Applications Across Industries
ISO 8752 pins are widely used in:
- Automotive gearboxes
- Industrial machinery
- Electric motors
- Agricultural equipment
- Pumps & valves
- Tool assemblies
11. Installation Guidelines
✔ Use correct hole diameter
✔ Use punch or press tool
✔ Avoid hammering without guide
✔ Ensure pin sits flush or slightly recessed
12. Hole Diameter Recommendation
Hole diameter is typically:
- Slightly larger than nominal pin diameter
- Designed to allow elastic compression
This reduces:
- Installation force
- Risk of cracking components
13. Load & Shear Performance
ISO 8752 pins provide:
- Good shear resistance
- Excellent fatigue behavior
- Shock load absorption
They are not meant for:
❌ Primary structural load
❌ Tensile load
14. Quality Control at Super Industries India
Each batch undergoes:
- Dimensional inspection
- Slot width control
- Hardness testing
- Surface finish checks
Export-ready with full traceability.
15. Custom Spring Pins
We offer:
- Special slot width
- Heavy-duty spring force
- Non-standard lengths
- Corrosion-resistant grades
16. Buyer FAQ (SEO)
Q: Can ISO 8752 replace dowel pins?
Yes, in dynamic or vibration-prone assemblies.
Q: Are ISO 8752 pins reusable?
Limited reuse is possible, but replacement is recommended.
17. Typical Pairing Components
ISO 8752 pins are commonly used with:
- Gears
- Shafts
- Levers
- Bushings
- Couplings
18. Export Supply Capability
Super Industries India exports ISO 8752 spring pins to:
- OEM manufacturers
- Automotive suppliers
- Industrial distributors
With customized packaging and labeling.
19. Engineering Mistakes to Avoid
❌ Using oversized hole
❌ Reusing fatigued pins
❌ Incorrect material for corrosive environments
20. Conclusion
ISO 8752 spring pins are simple, reliable, and vibration-proof fastening solutions for precision assemblies.
Super Industries India manufactures ISO 8752 spring pins to meet global industrial and export standards.