SIMCLNR Boring Bar
SI-MCLNR 40-6 -5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ Inserts
Made in the USA
SIMCLNR 40-6 -5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ Inserts
SIMCLNR Boring Bar
SI-MCLNR 40-6 -5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ Inserts
Made in the USA
SIMCLNR 40-6 -5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ Inserts

SIMCLNR 40-6 -5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ Inserts

Boring Bar
$432.70
Item #
Quantity
- +

SIMCLNR 40-6 — boring bar, 2.50" bar diameter, 3.062" minimum bore, 16.0" overall length. Made in the USA by RMC Tooling.

-5° Side & End Cutting Edge Angle for Negative 80° Diamond CNM_ 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: SIMCLNR 40-6
  • Minimum bore: 3.062"
  • Bar diameter (D): 2.50"
  • Overall length (C): 16.0"
  • Lead angle (K°): 11°
  • Holding method: screw only
  • Holder style: straight shank, 40° side cutting edge angle
  • Holder rake: 7° positive
  • Hand: left hand
  • 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.

Insert CNM_-643 (e.g. CNMA 643) — 3/4" I.C. · 1/4" thick · 3/64" nose radius
Seat / shim ICSN-633
Lock pin NL-68
Clamp CL-12
Clamp screw XNS-510
Seat screw S-68

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 47.

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