Tooltos 2-in-1 Ring Stretcher Expander and Reducer | US Size 4-14 Double Mandrel Jewelry Repair
- 98 in stock
Description
- 2-in-1 Expander and Reducer — Expand rings using the double mandrel (US sizes 4–14) and reduce rings using 8 reduction dies (13–21mm) in one machine.
- US Size 4–14 Expanding Range — Standard US ring sizing scale, suitable for jewelry repair shops working with US-sized rings.
- Double Mandrel Design — 4-segment double mandrel provides stable, even expansion across the ring band.
- 8 Reduction Dies Included — Sizes 13 / 14 / 15 / 17 / 18 / 19 / 20 / 21mm for reducing ring diameter to fit smaller sizes.
- Cast Iron Body and Steel Components — Heavy-duty construction for stable, consistent operation during ring resizing work.
- Bench Mountable — 4 pre-drilled holes for secure workbench installation. Reversible base plate for switching between expanding and reducing functions.
The Tooltos US 4-14 2-in-1 Ring Stretcher Expander and Reducer is designed for jewelry repair shops working with US-sized rings. The double mandrel covers US sizes 4–14, while the 8 reduction dies (13–21mm) allow ring size reduction without a separate tool. The cast iron body and steel components provide long-term durability for daily repair shop use. Suitable for gold, silver, platinum, copper, brass and other non-ferrous metal rings.
US vs HK Ring Size Models — Which Should You Choose?
| Feature | US 4-14 (This) | HK 1-33 | HK 6-36 |
|---|---|---|---|
| Size Standard | US (American) | HK (Hong Kong) | HK (Hong Kong) |
| Expanding Range | US 4–14 | HK 1–33 | HK 6–36 |
| Mandrel Type | Double mandrel | 6-segment spline | 4-segment spline |
| Reduction Dies | 13–21mm (8 dies) | 14–23mm (8 dies) | 13–22mm (8 dies) |
| Best For | US market jewelry repair shops | HK standard, smaller sizes | HK standard, larger sizes |
Best For / Not For
| Best For | Not For |
|---|---|
| US-sized ring expanding and reducing Plain band gold, silver and platinum rings Coin ring sizing (US sizes) Jewelry repair shops serving US market Ring reduction 13–21mm diameter |
Stone-set rings (risk of damaging settings) Steel or titanium rings HK-sized rings (use HK 1-33 or HK 6-36 models) Rings requiring reduction beyond 21mm |
Technical Specifications
| Material | Cast Iron Body and High Carbon Steel Components |
| Size Standard | US (American) Ring Sizes |
| Expanding Range | US Size 4–14 (4-segment double mandrel) |
| Reduction Die Sizes | 13 / 14 / 15 / 17 / 18 / 19 / 20 / 21mm (8 dies) |
| Machine Dimensions | 110 × 180 × 410mm |
| Machine Weight | 9.0 kg / 19.8 lb |
| Bench Mounting | 4 pre-drilled holes |
| Base Plate | Reversible (expander / reducer) |
| Suitable Metals | Gold, silver, platinum, copper, brass and other non-ferrous metals |
Pro Tips
- Anneal the ring before expanding or reducing to reduce the risk of cracking, especially for work-hardened metals.
- Expand or reduce gradually in small increments — avoid forcing the ring to the target size in a single pass.
- Mount the machine securely to your workbench using the 4 pre-drilled holes for stable, controlled operation.
- Inspect stone-set rings carefully before resizing — if in doubt, remove stones before expanding or reducing.
Frequently Asked Questions
What is the difference between this US model and the HK models?
This model uses the US (American) ring sizing standard (sizes 4–14). The HK 1-33 and HK 6-36 models use the Hong Kong ring sizing standard. Choose this model if your customers use US ring sizes.
What is a double mandrel?
The double mandrel design uses two mandrel rods working together to provide even, stable expansion across the ring band, reducing the risk of uneven stretching.
Can I use this on stone-set rings?
Use caution. Expanding or reducing rings with set stones risks damaging the settings. Remove stones before resizing where possible.
What ring sizes can this machine expand to?
US sizes 4–14 using the 4-segment double mandrel.
What sizes can the reducer handle?
The 8 reduction dies cover 13 / 14 / 15 / 17 / 18 / 19 / 20 / 21mm ring diameters.
Can this machine work on titanium or steel rings?
No. This machine is designed for non-ferrous metals only. Titanium and steel rings require specialist equipment.
Does it need to be bolted to a bench?
Strongly recommended. The machine has 4 pre-drilled mounting holes for secure workbench installation.
What's Included
- 1 x Tooltos Ring Stretcher Expander and Reducer Machine (US 4-14)
- 1 x Reduction Die Set (8 dies: 13–21mm)
- 1 x Control Lever
Support
For technical questions or order support, contact the Tooltos team at sales@tooltos.com. We typically respond within 24 hours.
