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BRM Series

Broach Rifling Machine
Precihole Vertical Honing Machine

Precihole is proud to be in a very small elite group of machine manufacturers in the world that can provide a broach rifling machine for medium and large caliber weapon systems. Broach rifling creates spiral grooves in the barrel using a hook cutter. The linear and rotary motion of the hook cutter are precision controlled for accuracy using a servo drive and ball screw or rack and pinion mechanism. The broach cutters are progressive in size and each cutter cuts a size slightly bigger than the previous one.

Machine Features
  • Use of ball screw or precision rack and pinion and servo drives for reciprocating linear motion
  • Precision interpolation and control of linear and rotary axes of the spindle
  • Special fixturing for quick component location and clamping
  • 10 micron fine coolant filtration system
  • Fanuc / Siemens CNC controls
  • User friendly machine operation
Model BRM40 BRM100 BRM155
Rifling Diameter Range (Ø) mm 20 - 40 20 - 100 50 - 160
Configuration Part Stationary - Tool Rotating and Feeding
No. of Spindles nos 1
Max. Length of Barrel mm 3000 5000 10000
Max. Barrel OD mm 100 150 250
Max. Barrel Weight kg 200 900 2500
Max. Broaching Force N 30,000 1,00,000 1,50,000
Feed Range m /min 0 - 8
Model BRM40 BRM100 BRM155
Rifling Diameter Range (Ø) in 0.78 - 1.57 1.18 - 5 2 - 6.5
Configuration Part Stationary - Tool Rotating and Feeding
No. of Spindles nos 1
Max. Length of Barrel in 120 196 400
Max. Barrel OD in 4 6 10
Max. Barrel Weight lbs 450 2000 5500
Max. Broaching Force N 30,000 1,00,000 1,50,000
Feed Range ft / min 0 - 25
Model BRM40 BRM100 BRM155
Rifling Diameter Range (Ø) mm 20 - 40 20 - 100 50 - 160
Configuration Part Stationary - Tool Rotating and Feeding
No. of Spindles nos 1
Max. Length of Barrel mm 3000 5000 10000
Max. Barrel OD mm 100 150 250
Max. Barrel Weight kg 200 900 2500
Max. Broaching Force N 30,000 1,00,000 1,50,000
Feed Range m /min 0 - 8
Model BRM40 BRM100 BRM155
Rifling Diameter Range (Ø) in 0.78 - 1.57 1.18 - 5 2 - 6.5
Configuration Part Stationary - Tool Rotating and Feeding
No. of Spindles nos 1
Max. Length of Barrel in 120 196 400
Max. Barrel OD in 4 6 10
Max. Barrel Weight lbs 450 2000 5500
Max. Broaching Force N 30,000 1,00,000 1,50,000
Feed Range ft / min 0 - 25