Stretch, reduce, and bend ring bands with exceptional precision using a single, heavy-duty benchtop machine. The Durston® Ring Stretcher / Reducer / Bender combines a 6-spline expansion mandrel, a 16-hole polished reduction plate, and a side-mounted ring bender into a solid cast iron housing. Engineered with a mechanical gear reduction system, it eliminates physical strain while enabling bench jewelers to enlarge, shrink, and shape precious metal bands effortlessly.
Why Choose the Durston® Ring Stretcher / Reducer / Bender
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All-in-One 3-in-1 Versatility: Combines ring stretching, band reducing, and shank bending capabilities in a single compact bench footprint.
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6-Spline Precision Expansion Mandrel: Distributes radial outward pressure evenly across ring interiors to stretch bands up to size 16 without distortion or flat spots.
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16 Polished Countersunk Reducing Dies: Reversible reduction plate features 16 polished countersunk dies designed to compress bands up to 12mm wide without marring polished surfaces.
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Mechanical Gear Reduction System: Specially engineered gearing delivers high torque advantage, making the resizing of thick gents' rings and plain wedding bands nearly effortless.
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Integrated Side Ring Bender: Built-in bending attachment and die block allow quick, seamless curving of flat or half-round stock into circular shanks.
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Heavy-Duty Cast Iron Frame: Solid cast iron body provides superior stability, strength, and vibration damping for long-term workshop durability.
Technical Specifications
| Brand Authority | Durston® Tools |
| Product Name | Ring Stretcher / Reducer / Bender |
| Frame Material | Heavy-Duty Cast Iron Construction |
| Expansion Mandrel Type | 6-Spline Precision Mandrel |
| Maximum Stretching Capacity | Approx. 25 mm Diameter (Up to Ring Size 16) |
| Reduction Capacity | Accommodates Bands Up to 12 mm Wide |
| Reduction Die Set | 16 Polished Countersunk Reversible Dies |
| Drive Mechanism | Integrated Mechanical Gear Reduction System |
| Integrated Features | Side Ring Bending Tool with Additional Die Block |
| Primary Utility | Ring stretching, band reducing, shank bending, non-marring ring sizing |
Free Global Shipping
We process orders within 1-3 business days. Estimated standard international delivery is 6-12 business days.
14-Day Returns
We have a 14-day return policy. Items must be unused, with all original accessories, and in original packaging.
For full details, please refer to our Shipping and Refund policies at the bottom of the page.
