Durston 2127 Large Ring Stretcher Mandrel

This large expanding ring stretcher mandrel is designed to enlarge and size bigger rings in a compact format that tucks easily into a drawer or tool roll. Once clamped in place, the mandrel expands smoothly as you turn the center bolt, easing the shank out to its new size in controlled steps.

Features

• Large expanding ring stretcher mandrel sized for bigger ring diameters.
• Compact 92 mm length makes it easy to store or pack for on-the-go work.
• Can be secured in a vise or clamp, or used with a suitable lathe/polisher setup.
• Center bolt expansion tightened with the included hex key for even, controlled stretching.
• Supports both gentle sizing adjustments and truing slightly out-of-round rings.
• Designed to complement Durston’s ring stretcher and sizing tools for a flexible sizing workflow.

Specifications

What's Included

Notes

Place the ring over the mandrel, then tighten the center bolt gradually with the hex key to stretch the ring. Work in small increments and check the size frequently to avoid over-stretching, especially on soldered or stone-set rings. Secure the mandrel firmly in a vise, clamp, or appropriate machine fixture before use.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.