Pin Products Overview
Chaudhary Impex manufactures precision pins in various configurations for mechanical assemblies, tooling, and industrial applications. Our pins are manufactured to tight tolerances using advanced machining techniques and quality materials.
Pin Types
Dowel Pins
Precision ground
Hardened & tempered
Close tolerance fit
Taper Pins
Self-locking design
Easy installation
Standard taper 1:48
Grooved Pins
Spring steel pins
Three groove design
Retained by compression
Spiral Pins (Roll Pins)
Rolled from flat strip
Chamfered ends
Self-retaining
Clevis Pins
Head & cross hole
Cotter pin retention
Linkage applications
Hinge Pins
Pivot applications
Removable design
Various head styles
Shaft Locking Pins
Quick release mechanism
Ball-lock design
Positive engagement
Engineers' Pins
Precision machined
Custom configurations
Special applications
Hammer Drive Pins
Drive-fit installation
Knurled surface
Permanent assembly
Pin Material Specifications
| Material | Grade/Standard | Hardness | Shear Strength (MPa) | Applications |
|---|---|---|---|---|
| Alloy Steel | AISI 4140, DIN 1.7225 | HRC 28-32 | 650-850 | General industrial, machinery |
| Hardened Steel | AISI 4340, ISO 8734 | HRC 48-52 | 950-1100 | High load applications, tooling |
| Stainless Steel 303 | AISI 303, DIN 1.4305 | HRB 85-95 | 450-600 | Corrosion resistant, food processing |
| Stainless Steel 316 | AISI 316, DIN 1.4401 | HRB 79-89 | 400-550 | Marine, chemical environments |
| Spring Steel | AISI 1070, DIN 1.0603 | HRC 45-50 | 800-1000 | Grooved pins, roll pins |
| Brass | CuZn37, DIN 2.0321 | HRB 60-75 | 250-400 | Low friction, non-magnetic |
| Titanium Grade 5 | Ti-6Al-4V, AMS 4928 | HRC 33-38 | 830-900 | Aerospace, lightweight |
| Inconel 718 | UNS N07718, AMS 5662 | HRC 35-43 | 1100-1240 | High temperature, corrosive |
Pin Specifications
| Type | Diameter Range | Length Range | Tolerance | Surface Finish |
|---|---|---|---|---|
| Dowel Pins | 1mm - 50mm | 3mm - 500mm | Hardened steel, SS | |
| Taper Pins | 1.5mm - 25mm | 10mm - 200mm | Carbon steel, SS | |
| Grooved Pins | 2mm - 20mm | 6mm - 150mm | Spring steel | |
| Spiral Pins | 1.5mm - 32mm | 6mm - 200mm | Spring steel, SS | |
| Clevis Pins | 3mm - 50mm | 20mm - 500mm | Carbon steel, SS |
Materials & Finishes
Carbon Steel
SAE 1018, 1045, hardened & tempered options
Stainless Steel
304, 316, 17-4 PH, corrosion resistance
Alloy Steel
4140, 8620, heat treated for strength
Spring Steel
Music wire, oil tempered, high carbon
Brass
Non-magnetic, electrical applications
Titanium
Aerospace grade, lightweight, strong
Standard Specifications
- ISO 8734: Parallel pins, hardened and ground
- ISO 8735: Taper pins with internal thread
- DIN 1: Taper pins, unhardened
- DIN 7: Taper pins, hardened
- DIN 1472: Grooved pins with three grooves
- DIN 7344: Spiral pins, heavy duty type
- ASME B18.8.2: Taper pins, dowel pins, straight pins
- MS 9245: Military specification pins
Applications by Industry
Aerospace
Aircraft assemblies
Engine components
Landing gear
Automotive
Transmission parts
Brake components
Steering systems
Industrial Machinery
Tooling & jigs
Assembly fixtures
Mechanical linkages
Marine
Deck equipment
Steering gear
Anchor systems
Construction
Heavy equipment
Crane assemblies
Structural connections
Electronics
Connector pins
Test points
Circuit boards
Design Considerations
Pin Selection Guidelines:
- Dowel Pins: Best for precise alignment, permanent assemblies
- Taper Pins: Self-locking, removable, high shear loads
- Grooved Pins: Quick assembly, some vibration resistance
- Spiral Pins: Cost effective, field serviceable
- Clevis Pins: Hinged connections, removable with tools
Load Considerations:
- Shear load capacity based on material and diameter
- Double shear loading preferred over single shear
- Consider bearing stress on mating parts
- Safety factor typically 2:1 to 4:1
Quality & Testing
Dimensional Inspection
CMM measurement, tight tolerances
Material Certification
Mill test certificates, traceability
Hardness Testing
Rockwell testing per specification
Surface Finish
Ra measurements, visual inspection