| Part No. | Description | Quantity |
|---|---|---|
| 20701 | Expanding Ring Mandrel Body | 1 |
| 20703 | Expanding Ring Mandrel Taper Screw | 1 |
| 20702 | Expanding Ring Mandrel Spacer | 1 |
| 40580 | Tommy Bar | 2 |
| 40550 | 5/32″ Hex Key | 1 |
Expanding Ring Mandrel
Sherline Products, in collaboration with Bryan D. Drummond (gem cutter and goldsmith), designed this Expanding Ring Mandrel specifically for making and modifying rings on the Sherline lathe.
The mandrel is manufactured from 12L14 steel and features a black oxide finish for rust prevention.
It is designed for use with stepped ring collets manufactured by Ring Tech (Faceting Collets Stepped). These Ring Tech collets are known for their excellent quality and superior design, and, like our machines, are made in the USA.
If you are using a brand of collet that is shorter than the Ring Tech collets, the mandrel includes a spacer washer that fits against the shoulder of the mandrel. This allows shorter collets to be properly positioned at the front of the mandrel.
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Related products


Jeweler Burr Holder
These specialized holders were developed at the request of a jewelry design customer. Similar to our standard end mill holders, they feature a longer body with a tapered end, allowing better visibility of the cutter and improved access for working in cavities.
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P/N 2078 holds jeweler’s burrs with a 3/32" shank.
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P/N 2079 is designed for Dremel® tools and other cutters with a 1/8" shank.
- P/N 2080 holds jeweler’s burrs with a 3mm shank.
Each holder includes two Tommy bars and one 1/16" hex key.


Jeweler DOP Holder
Sherline Products, in collaboration with Bryan D. Drummond (Gem Cutter & Goldsmith), has designed this DOP Holder specifically for securely holding lapidary DOP sticks during gemstone cutting. If you already own one of our machines, the holder is designed to thread directly onto our ¾-16 headstock spindle nose. It will also be an essential accessory for our upcoming gem cutting machines.
Compatible with Ultra Tec® Dops This DOP Holder has been precisely engineered with tolerances and a keyed dop system designed for compatibility with Ultra Tec® brand dops which are used on their faceting machines. Many gem cutters use Ultra Tec equipment for flat faceting, and the keyed dop feature provides secure alignment and ease of use, making it a valuable addition to your setup. Sherline does not manufacture dops, but they can be purchased directly from Ultra Tec. Like Sherline, Ultra Tec products are high-quality and Made in the USA. Shop Ultra Tec Dops Features:- Made from 12L14 steel with electroless nickel plating for corrosion resistance
- Tapered body provides greater visual access to the stone during cutting
- ¼" dop hole with 10-32 set screw to secure the dop
- 3/32" locating pin for alignment of angle-cut dops
- Precision-machined with tight tolerances for a secure, accurate fit
- Keyed dop system ensures repeatable orientation and alignment
- Fully compatible with Ultra Tec® brand dops and machines
- High-quality construction - Made in the USA





