Here is a small head that will be in constant demand in any shop.

Note the wide base bearing surface that assures maximum rigidity even when the bar holder is in an off-set position. This wide base design is a recent Criterion innovation that increases bearing surfaces by 50% over the older models.

 

A choice of either 3/8” or 1/2” double hole bar holder with a 1/2” cross hole is available.

The unit has a 7/8”-20NC threaded back and also features a direct reading dial screw.

 

 

Here is a sturdy unit of extended boringrange, capable of peeling off heavy roughing cuts as well tool of extreme sensitivity. The use of a wide-base bar-holder resting securely on the body, eliminates the need for a separate side plate. You will notice it has now become an integral part of the body. The direct reading adjusting screw is ground after hardening and a plainly marked dial face in non-reflecting satin chrome allows easy reading and adjustmens of .005 or less.

All Cntenon Boring Heads have threaded backs for use with a variety of shanks. This model takes a 1-1/2”-18 threaded shank.  

 

 

This is a bigger boring head which can be put on a large machine to process more as you want. The radius of boring hole can reach on about Ø400mm long by a boring bar of 160mm.