H40 DCLNR 4 — interchangeable head, 2-1/2" head diameter. Made in the USA by RMC Tooling.
Interchangeable boring head from RMC Tooling, machined in the United States. The head mounts on a matching RMC bar, so one bar covers a whole family of geometries and you only buy the cutting end.
The retention system is not interchangeable between families: heads with a W suffix use SM-series seats with LP-series pins, and heads without it use ICSN/IDSN seats with NL-series pins. The exact parts for this head are listed below.
These are the service parts RMC lists for this style and insert size. Every one is stocked.
| Insert | CNMG-432 — 1/2" I.C. · 3/16" thick · 1/32" nose radius |
| Seat / shim | SM-303 |
| Clamp | CL-21 |
| Clamp screw | STC-20 |
See all RMC spare parts & hardware →
Not sure how to read an insert code? Turning insert designation explained.
Specifications decoded from the RMC toolholder identification system (RMC 2020 catalog, page 2).
