Dowel Pins
Dowel Pins are high-precision cylindrical fasteners used to align, locate, and secure machine components with high positional accuracy. These pins provide exceptional shear strength, wear resistance, and vibration stability, making them ideal for automotive, aerospace, heavy machinery, and precision tooling applications.
At Rajal Industries, we manufacture precision-engineered Dowel Pins conforming to ISO, ASME, and DIN standards, ensuring tight tolerance control, superior load distribution, and long-lasting performance in high-precision assembly applications.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric Diameters: 1mm to 20mm | ISO 8734 – International standard for solid hardened steel dowel pins |
| Imperial Diameters: 1/16" to 3/4" | ASME B18.8.1 – U.S. standard for dowel pins |
| Lengths: Customizable | DIN 6325 – German standard for precision locating dowel pins |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Hardened Carbon Steel | Class 5.8, 8.8, 10.9 | ISO 8734, DIN 6325, ASME B18.8.1 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506, ISO 8734 |
| Alloy Steel (High Shear Strength) | Class 10.9, 12.9 | ISO 8734, DIN 6325 |
| Brass (Non-Corrosive & Electrical Applications) | Custom Hardness Ratings | ISO 8734, ASME B18.8.1 |
- Heat-Treated for Maximum Hardness & Wear Resistance –Dowel pins undergo case hardening, induction hardening, and through-hardening for optimal durability.
- Load Ratings Based on Material & Application:
- Hardened Carbon Steel Class 8.8 Dowel Pin: 800-900 MPa tensile strength
- Stainless Steel A4-80 Dowel Pin: 700-800 MPa corrosion-resistant strength
Dowel Pin Design & Engineering Features
Precision-Ground & Chamfered Ends for Easy Insertion
- Designed with tight tolerances (H7, h8, h6 fitments) to ensure interference-free installation and retention.
Chamfered ends allow smooth alignment and insertion into reamed holes.
High Shear Strength for Load-Bearing Applications
- Provides secure, non-threaded fastening with exceptional load distribution.
Used for high-precision machine assembly, dies, and jigs.
Vibration & Shock Resistance for Secure Component Locking
- Prevents axial movement and rotational misalignment in dynamic environments.
Commonly used in engine components, transmission systems, and heavy machinery.
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.
Available in Straight, Tapered & Groove Variants for Specific Applications
- Standard Parallel Dowel Pins – Used for precision alignment and load distribution.
Tapered Dowel Pins – Provides self-centering action for easy insertion.
Grooved & Spiral Dowel Pins – Ensures extra holding power and resistance to axial forces.
Thread Specifications & Precision Engineering
| Feature | Description | Application |
|---|---|---|
| Press-Fit Dowel Pins (H7/H8 Fit) | Designed for tight-tolerance interference fit | High-precision machinery, aerospace components |
| Slip-Fit Dowel Pins | Allows easy insertion & removal without press-fit interference | Automotive, modular assemblies |
| Tapered-End Dowel Pins | Enables self-aligning assembly | Jigs, fixtures, dies |
| Spiral & Grooved Dowel Pins | Provides high retention force in high-vibration applications | Railways, heavy machinery |
Thread Fitment & Compliance
- Metric dowel pins conform to ISO 8734 & DIN 6325 tolerances, ensuring secure component alignment.
- Imperial dowel pins meet ASME B18.8.1 standards for precision engineering applications.
Common Applications of Dowel Pins
- Automotive & Aerospace Engineering – Used for transmission components, valve systems, and landing gear assemblies.
- Industrial Machinery & Heavy Equipment – Ensures high-strength fastening in mechanical assemblies, rotating components, and high-load joints.
- Tooling & Precision Machining – Provides accurate alignment in jigs, dies, fixtures, and CNC machining setups.
- Railway & Marine Systems – Used in shock-resistant applications, locomotive assemblies, and marine propulsion systems.
- Medical & Laboratory Equipment – Ensures precise alignment in surgical tools, diagnostic machines, and laboratory devices.
Why Choose Rajal Industries for Dowel Pins?
Manufactured to International Standards
Ensuring precision engineering, strength, and compliance.
Hardened & Precision-Ground for Maximum Accuracy
Designed for high-load, high-precision assemblies.
Customizable Variants Available
Offering parallel, tapered, grooved, and spiral dowel 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