SIMSKNR 20-4 15° End Cutting Edge Angle for Negative Square SNM_ Inserts

SIMSKNR 20-4 — boring bar, 1.25" bar diameter, 1.470" minimum bore, 14.0" overall length. Made in the USA by RMC Tooling.

15° End Cutting Edge Angle for Negative Square SNM_ 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.

Specifications

• Model: SIMSKNR 20-4
• Minimum bore: 1.470"
• Bar diameter (D): 1.25"
• Overall length (C): 14.0"
• Lead angle (K°): 14°
• Holding method: screw only
• Holder style: straight shank, 40° side cutting edge angle
• Brand: RMC Tooling — made in the USA

Exact replacement parts for this tool

These are the service parts RMC lists for this exact model — not a generic cross-reference. Every one is stocked.

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 48.