Insert cutters rapidly chamfer small bores

Cutters having have square, indexable, carbide inserts are made for high precision chamfering of small bores, giving good surface finish using high feed rates of up to 0.4mm/rev.

For rapid, high precision chamfering of small bores, a new range of purpose-designed cutters has been introduced by BIG Daishowa, Japan, and is available in the UK through NCMT.

Called C-Cutter Mini, the tools have square, indexable, carbide inserts secured firmly by a screw.

The bespoke design ensures good surface finish and long insert life, despite high feed rates up to 0.4mm/rev.

This is in contrast to some tools on the market that use standard inserts, which tend to chatter when chamfering due to compromised rake and clearance angles.

Overlapping chamfering ranges allow seven variations of cutter to machine bores from 2 to 42mm diameter, with back chamfering also available in some styles.

The number of tool changes is consequently reduced, thereby increasing productivity.

Standard chamfer angle is 45 deg, although BIG Daishowa also offers a 30 deg and a 60 deg cutter in the Mini programme.

Cylindrical shank diameters are from 10 to 32mm and there are various insert styles and sizes to suit.

Machining is achieved by interpolating the Mini cutters, whereas with larger BIG C-Cutters for bores up to 100mm diameter, contouring can be replaced by very accurate plunge-chamfering.

Back to top