Taper Pins
Taper Pins are cylindrical, slightly tapered fasteners designed for precise alignment, secure positioning, and high-strength fastening in mechanical and structural assemblies. Unlike straight dowel pins, taper pins self-lock into position due to their gradual taper, making them ideal for machinery, tooling, and precision component assemblies.
At Rajal Industries, we manufacture precision-engineered Taper Pins conforming to ASME, ISO, and DIN standards, ensuring superior shear strength, tight tolerances, and long-lasting reliability for industrial, automotive, and aerospace applications.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Imperial Diameters: 1/8" to 1/2" | ASME B18.8.3 – U.S. standard for solid and threaded taper pins |
| Metric Diameters: Custom sizes available | ISO 8752 – Standard for spring-type taper pins |
| Lengths: 1" to 6" | DIN 1 – German standard for precision taper pins |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Hardened Carbon Steel | Class 5.8, 8.8, 10.9 | ISO 8752, DIN 1, ASME B18.8.3 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506, ISO 8752 |
| Alloy Steel (High Shear Strength) | Class 10.9, 12.9 | ISO 8752, DIN 1 |
| Brass (Non-Corrosive & Electrical Applications) | Custom Hardness Ratings | ISO 8752, ASME B18.8.3 |
- Heat-Treated for Maximum Hardness & Wear Resistance –Taper pins undergo case hardening, induction hardening, and through-hardening for enhanced durability.
- Load Ratings Based on Material & Application:
- Hardened Carbon Steel Class 8.8 Taper Pin: 800-900 MPa tensile strength
- Stainless Steel A4-80 Taper Pin: 700-800 MPa corrosion-resistant strength
Taper Pin Design & Engineering Features
Self-Locking Mechanism for Secure Assembly
- The gradual taper (typically 1:50 or 1:48 ratio) ensures a tight fit without requiring additional fasteners.
Provides a friction-based lock, preventing loosening in high-vibration environments.
High Shear Strength for Load-Bearing Applications
- Distributes load evenly across the surface, reducing stress concentration.
Used in precision machine assembly, mechanical linkages, and rotating components.
Corrosion-Resistant Variants for Harsh Environments
- Available in stainless steel, zinc-plated, and black oxide finishes.
Ensures long-term durability in marine, aerospace, and high-humidity conditions.
Straight, Threaded & Spiral Variants for Specialized Applications
- Solid Taper Pins – Used for high-precision alignment and structural support.
Threaded Taper Pins – Designed for easy removal and reusability.
Grooved Taper Pins – Provides additional grip and retention for heavy-duty applications.
Thread Specifications & Precision Engineering
| Feature | Description | Application |
|---|---|---|
| Solid Taper Pins | Traditional self-locking design for secure positioning | Machinery, aerospace, and heavy equipment |
| Threaded Taper Pins | Features external threads for easy removal | Automotive, industrial tooling |
| Grooved & Spiral Taper Pins | Provides extra retention in high-vibration environments | Railways, precision assemblies |
| Spring-Loaded Taper Pins | Allows flexibility and controlled fastening | Aerospace, robotics |
Thread Fitment & Compliance
- Metric taper pins conform to ISO 8752 & DIN 1 tolerances, ensuring secure component alignment.
- Imperial taper pins meet ASME B18.8.3 standards for industrial and precision applications.
Common Applications of Taper Pins
- Automotive & Aerospace Engineering – Used for gear assembly, transmission components, and jet engine components.
- Industrial Machinery & Heavy Equipment – Provides precise alignment and secure positioning in rotating components.
- Tooling & Precision Machining – Ensures high-accuracy fixture alignment in CNC machines, dies, and jigs.
- Railway & Marine Systems – Used in locomotive linkages, suspension systems, and ship components.
- Medical & Laboratory Equipment – Ensures precise alignment in surgical tools, diagnostic machines, and laboratory devices.
Why Choose Rajal Industries for Taper Pins?
Manufactured to International Standards
Ensuring precision engineering, strength, and compliance.
Self-Locking & High-Shear Strength Design
Engineered for high-load, high-precision assemblies.
Customizable Variants Available
Offering solid, threaded, grooved, and spiral taper pins.
Bulk & Custom Orders
Ideal for automotive, aerospace, precision tooling, and heavy machinery industries.
Stringent Quality Control
Each batch undergoes dimensional accuracy testing, shear strength verification, and corrosion resistance assessment.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com