Our unique Balance-Cut BAC, RAC and BCB Blade Boring Solutions provide an efficient, stable and reliable option for any large diameter boring requirements.

Consisting of a one piece base holder, a precision symmetrical blade in conjunction with a wide variety of boring cartridges and balance weights the system is both versatile and configurable to suit any demand or process.

Our large diameter solutions provide roughing, semi-finishing and fine finishing capabilities from 130mm diameter right up to just under 600mm diameter (approx.. 595mm) as standard. Special diameters and lengths can also be considered on request.

NIKKEN's large diameter boring range, depending on tool shank, is available in 4 distinct ranges:

  • RAC - 'Balance-Cut' system for RAC twin blade roughing of diameters 130.0mm to 580.0mm.
  • BAC - 'Balance-Cut' system for ZMAC single point finishing of diameters 130.0mm to 595.0mm.
  • BCB - 'Balance-Cut' system for BCB single point finishing of diameters 130.0mm to 595.0mm.
  • BCB-W - 'Balance-Cut' system for BCB twin blade finishing of diameters 130.0mm to 595.0mm.

NEW - Just launched are our brand new RAC and BAC Alpha lightweight special hardened alloy range to expand the scope and application of our innovative 'large diameter' boring solutions. The system also provides a unique 'over-turning' capability using reversible cartridges.

  • Unique, precise arbor and blade system

  • Power & Smooth Boring

  • Double Cutting Capability

  • Balanced Cutting Capability

  • High Pressure Coolant Options

RAC Balance-Cut Boring Technical Diagram Large Diameter Boring

RAC Balance-Cut Boring Drawing

BAC Balance-Cut Boring Technical Diagram

BAC Balance-Cut Boring Drawing

BCB BALANCE-CUT BORING Technical Diagram

BCB BALANCE-CUT BORING DRAWING

High Pressure Coolant Through Tool

High Pressure Coolant Through Tool

Boring Brochure

(PDF - 70.4 MB)

Nikken NC Tooling Solutions Catalogue

(PDF - 29.3 MB)

Shank Boring Arbor Spacer/Plate Head/Cartridge/Bit Dia 'D' Min Dia 'D' Max Boring Depth 'H' Insert Application
BT40-RAK-130A + RPC-130 + MCCZ-130V + MCC-130B BT40 BT40-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
BT40-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B BT40 BT40-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
BT40-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B BT40 BT40-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
BT50-RAK-110A + RPC-130 + MCCZ-130V + MCC-130B BT40 BT40-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
BT50-RAK-110A + RPC-130 + MCCZ-130V + MCC-130B BT50 BT50-RAK-110A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 185.0 6MP Finishing
BT50-RAK-160A + RPC-130 + MCCZ-130V + MCC-130B BT50 BT50-RAK-160A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 235.0 6MP Finishing
HSK100A-RAK-110A + RPC-130 + MCCZ-130V + MCC-130B HSK100A HSK100A-RAK-110A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 185.0 6MP Finishing
HSK100A-RAK-160A + RPC-130 + MCCZ-130V + MCC-130B HSK100A HSK100A-RAK-160A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 235.0 6MP Finishing
HSK100A-RAK-210A + RPC-130 + MCCZ-130V + MCC-130B HSK100A HSK100A-RAK-210A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 285.0 6MP Finishing
HSK63A-RAK-130A + RPC-130 + BCB-130 + MCC-130B HSK63A HSK63A-RAK-130A RPC-130 BCB-130 + MCC-130B 130.0 195.0 205.0 10MP Finishing
HSK63A-RAK-130A + RPC-130 + MCCZ-130V + MCC-130B HSK63A HSK63A-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
HSK63A-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B HSK63A HSK63A-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
IT40-RAK-130A + RPC-130 + MCCZ-130V + MCC-130B IT40 IT40-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
IT40-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B IT40 IT40-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
IT50-RAK-110A + RPC-130 + MCCZ-130V + MCC-130B IT50 IT50-RAK-110A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 185.0 6MP Finishing
IT50-RAK-160A + RPC-130 + MCCZ-130V + MCC-130B IT50 IT50-RAK-160A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 235.0 6MP Finishing
IT50-RAK-210A + RPC-130 + MCCZ-130V + MCC-130B IT50 IT50-RAK-210A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 285.0 6MP Finishing
MBT40-RAK-130A + RPC-130 + BCB-130 + MCC-130B MBT40 MBT40-RAK-130A RPC-130 BCB-130 + MCC-130B 130.0 195.0 205.0 10MP Finishing
MBT40-RAK-130A + RPC-130 + MCCZ-130V + MCC-130B MBT40 MBT40-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
MBT40-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B MBT40 MBT40-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
MBT50-RAK-110A + RPC-180 + BCB-130 + MCC-130B MBT50 MBT50-RAK-110A RPC-180 BCB-130 + MCC-130B 180.0 245.0 185.0 10MP Roughing / finishing
MBT50-RAK-360A + RPC-130 + BCB-130 + MCC-130B MBT50 MBT50-RAK-360A RPC-130 BCB-130 + MCC-130B 130.0 195.0 435.0 10MP Roughing / finishing
MBT50-RAK-410A + RPC-130 + BCB-130 + MCC-130B MBT50 MBT50-RAK-410A RPC-130 BCB-130 + MCC-130B 130.0 195.0 485.0 10MP Roughing / finishing
NBT40-RAK-130A + RPC-130 + BCB-130 + MCC-130B NBT40 NBT40-RAK-130A RPC-130 BCB-130 + MCC-130B 130.0 195.0 205.0 10MP Finishing
NBT40-RAK-130A + RPC-130 + MCCZ-130V + MCC-130B NBT40 NBT40-RAK-130A RPC-130 MCCZ-130V + MCC-130B 130.0 195.0 205.0 6MP Finishing
NBT40-RAK-130A + RPC-180 + MCCZ-130V + MCC-130B NBT40 NBT40-RAK-130A RPC-180 MCCZ-130V + MCC-130B 180.0 245.0 205.0 6MP Finishing
NBT50-RAK-210A + RPC-130 + BCB-130 + MCC-130B NBT50 NBT50-RAK-210A RPC-130 BCB-130 + MCC-130B 130.0 195.0 285.0 10MP Finishing
NBT50-RAK-260A + RPC-130 + BCB-130 + MCC-130B NBT50 NBT50-RAK-260A RPC-130 BCB-130 + MCC-130B 130.0 195.0 335.0 10MP Roughing / finishing
NBT50-RAK-310A + RPC-130 + BCB-130 + MCC-130B NBT50 NBT50-RAK-310A RPC-130 BCB-130 + MCC-130B 130.0 195.0 385.0 10MP Roughing / finishing