S12 STUCR 3 — boring bar, 0.750" bar diameter, 0.954" minimum bore, 10.0" overall length. Made in the USA by RMC Tooling.
-3° End Cutting Edge Angle for 7° Positive Triangle TC_T Inserts.
Steel-shank indexable boring bar from RMC Tooling, machined in the United States. Ground shank, standard indexable geometry, and a rigid clamping system sized to the bar diameter — the combination that keeps chatter down at the depths where boring bars usually give up.
Sized by minimum bore, so start there: pick the largest bar diameter your bore will clear. Every clamp, lock pin, seat and screw in this bar is a stocked RMC service part, listed below.
These are the service parts RMC lists for this exact model — not a generic cross-reference. Every one is stocked.
| Insert | TC_T-32.52 (e.g. TCMT 32.52) |
| Insert Torx screw | RMC-004 |
| Torx key | T-15 — Torx Wrench |
See all RMC spare parts & hardware →
Not sure how to read an insert code? Turning insert designation explained.
Dimensions as published in the RMC 2020 catalog, page 57.
