DIN PINS & DOWEL PINS
Precision Alignment Fasteners
Manufacturer & Exporter – Super Industries India
DIN 1 | DIN 7 | DIN 6325 | DIN 1481 | DIN 7979
1. Introduction to DIN PINS & DOWEL PINS
DIN pins are precision mechanical fasteners used primarily for alignment, positioning, and load transfer between machine components. Unlike bolts or screws, pins are usually non-threaded and rely on interference fit, press fit, or elastic deformation to hold parts together.
At Super Industries India, we manufacture DIN-standard pins with tight tolerances, making them ideal for tooling, automotive, heavy machinery, valves, pumps, and industrial assemblies.
2. Types of DIN Pins Covered in This Page
| DIN Standard | Pin Type |
|---|---|
| DIN 1 | Taper Pins |
| DIN 7 | Taper Pins (Hardened) |
| DIN 6325 | Dowel Pins |
| DIN 1481 | Spring-Type Straight Pins (Roll Pins) |
| DIN 7979 | Parallel Pins with Internal Thread |
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
3. DIN 1 – Taper Pins
Overview
DIN 1 specifies tapered cylindrical pins with a 1:50 taper, used where accurate positioning is critical.
Key Features
✔ Self-locking due to taper
✔ High shear resistance
✔ Easy removal and reassembly
Applications
- Machine tools
- Gearboxes
- Couplings
Materials
- Carbon steel
- Alloy steel
- Stainless steel
4. DIN 7 – Hardened Taper Pins
Overview
DIN 7 is similar to DIN 1 but hardened and ground for high-precision alignment.
Advantages
- Higher wear resistance
- Excellent positional accuracy
- Longer service life
Typical Industries
- Aerospace
- Automotive tooling
- CNC machinery
5. DIN 6325 – Dowel Pins
Overview
DIN 6325 defines parallel dowel pins, one of the most widely used precision fasteners.
Tolerances
- m6 or h8 fit
- Ground finish
Key Benefits
✔ Accurate positioning
✔ Repeatable assembly
✔ High shear load capacity
Applications
- Molds & dies
- Engine components
- Machine frames
6. DIN 1481 – Spring-Type Straight Pins (Roll Pins)
Overview
DIN 1481 covers slotted spring pins that provide elastic retention.
Key Characteristics
- Self-expanding
- Shock absorption
- No need for reaming
Benefits
✔ Vibration resistance
✔ Easy installation
✔ Cost-effective
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
7. DIN 7979 – Parallel Pins with Internal Thread
Overview
DIN 7979 pins have internal threads that allow easy extraction.
Key Advantages
- Simplified disassembly
- Precision alignment
- Reduced damage to components
8. Mechanical Properties Comparison
| Standard | Type | Hardness |
|---|---|---|
| DIN 1 | Taper Pin | Medium |
| DIN 7 | Hardened Taper Pin | High |
| DIN 6325 | Dowel Pin | Hardened |
| DIN 1481 | Spring Pin | Spring steel |
| DIN 7979 | Threaded Dowel Pin | Hardened |
9. Manufacturing Process
1️⃣ Cold drawing
2️⃣ Cutting & chamfering
3️⃣ Heat treatment
4️⃣ Grinding
5️⃣ Surface finishing
10. Surface Finishes
- Plain
- Zinc plated
- Black oxide
- Stainless finish
11. Size Range
- Diameter: 1 mm to 50 mm
- Length: 5 mm to 300 mm
(Custom sizes available)
12. Quality Control
✔ Dimensional inspection
✔ Hardness testing
✔ Surface finish check
✔ Fit verification
13. Export Packaging
- Oil-coated packing
- Batch labeling
- Wooden boxes for export
14. Why Choose Super Industries India?
✔ Precision-ground pins
✔ DIN-compliant manufacturing
✔ Custom tolerances
✔ Bulk export capability
✔ Global delivery
15. DIN Pins vs Fasteners
| Feature | Pins | Bolts |
|---|---|---|
| Primary function | Alignment | Clamping |
| Threaded | No | Yes |
| Load type | Shear | Tensile |
16. Common Mistakes in Pin Selection
❌ Wrong tolerance fit
❌ Incorrect hardness
❌ Improper installation method
17. FAQs – DIN Pins
Q1: Can pins be reused?
Yes, except spring pins in critical applications.
Q2: Do you supply stainless pins?
Yes, SS 304 / 316 available.
18. Request Technical Support
📧 sales@superindustriesindia.in