Precision Taper Pins for Absolute Alignment and Self-Locking
Our Taper Pins are the preferred choice for mechanical engineers who require high-precision alignment that won’t shift under load. The 1:50 taper ratio ensures that as the pin is driven deeper into the hole, the radial pressure increases, creating a powerful self-locking fit through friction. Unlike parallel dowel pins, Metric Taper Pins can compensate for slight wear in the hole, making them ideal for long-term maintenance and heavy-duty shaft-to-hub connections.
We supply a full range of DIN 1 Taper Pins in unhardened steel for easy fitting and Stainless Steel Taper Pins for corrosive environments.
- Perfect Centering: The tapered geometry automatically centers the parts being joined, ensuring high concentricity.
- Compensates for Wear: If a hole becomes slightly oversized over time, a Taper Pin can simply be driven further in to maintain a tight fit.
- Easy Removal: While they lock securely, they can be easily removed by striking the small end, making them perfect for parts that require periodic servicing.
- Vibration Resistance: The wedge effect provides excellent resistance against loosening in vibrating machinery.
| Nominal Dia. (d1) | Small End Dia. (approx) | Standard Lengths | Material Grade |
|---|---|---|---|
| M3 | 2.4 mm | 10 – 40 mm | Steel / SS304 |
| M6 | 5.2 mm | 20 – 80 mm | Steel / SS316 |
| M10 | 8.8 mm | 30 – 120 mm | High Tensile 40Cr |
| M16+ | 14.5 mm | Up to 200 mm | Custom Alloy |
*d1 refers to the diameter of the large end. Taper is 1mm per 50mm of length.
- Internal Threaded Taper Pins (DIN 7978 / ISO 8736): Features a female thread in the large end for easy extraction using a slide hammer.
- External Threaded Taper Pins (DIN 7977 / ISO 8737): Features a male thread on the small end, allowing the pin to be pulled into the hole using a nut.
Q: How do I drill a hole for a Taper Pin?
A: You must first drill a straight pilot hole based on the small end diameter, and then use a Taper Pin Reamer with a 1:50 ratio to achieve the perfect tapered seat.
Q: What is the difference between DIN 1 and ISO 2339?
A: They are virtually identical and interchangeable for unhardened pins. Both specify the 1:50 taper ratio and similar dimensional tolerances.
High-Precision Taper Pins for Global Industry
Need custom sizes or Internal Threaded Taper Pins? We offer factory-direct wholesale pricing and rapid worldwide shipping. Contact our technical team for a quote!
