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55° RH and LH Tool Holders for Inserts w/7° Relief Angle
These holders are identical to our standard 55° Insert Tool Holders, with one key distinction.
While our original 55° holders are designed for DPMT inserts with an 11° relief angle, these updated holders are configured for DCMT inserts, which feature a 7° relief angle.
Over time, insert availability and design options evolve. The DPMT insert, once standard in our 55° holders, has become increasingly scarce and offers fewer chip breaker variations. In contrast, the DCMT insert is widely available and comes in a broad range of styles, making it a more versatile and accessible option.
Note: Many customers machining brass found excellent results with our uncoated 11° DPMT insert featuring a straight-groove chip breaker. Unfortunately, this insert is no longer available. That’s why we introduced these updated holders to accommodate 7° DCMT inserts.
For those working with brass, insert P/N 7613 is an ideal replacement. It cuts cleanly and delivers a high-quality surface finish.
Coated inserts with various chip breaker designs are still available for both DPMT and DCMT styles.
Holders & Inserts sold separately
| Insert Holder Material | Case Hardened Steel |
|---|---|
| Body Coating | Black Oxide |
| Insert Material | Carbide |
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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.
