Heavy Metal Bar Holders


Heavy metal boring bars provide higher rigidity and dampening of vibration. Collis boring bar holders are best suited for machining bores of 6:1 length over diameter ratio.

• Traverse ground tapers
• Hardened RC52-56
• Set screw included
• Exceeds ANSI standards
• Thru coolant capability
• Concentricity < 0.0002"
• AT3 taper accuracy and better

Item #

Shank Taper

ID (A)

OD (B)

Proj. Length (C)

Depth (D)

Set Screws

Concentricity