German cutting tool manufacturer Horn, represented in the UK and Ireland by Ringwood-based subsidiary
Horn Cutting Tools, has extended downwards in size its M475 grooving and cut-off milling system. Formerly a user could select a grooving width of either 5, 6 or 8mm, but now smaller inserts with a cutting width of 3 or 4mm are available.
The M475 system employs precision-ground, indexable inserts with four cutting edges. Positive geometry and a round chip breaker groove together with a new carbide grade, RC4G, deliver economical, productive machining performance. High toughness and hardness enable the machining of steels at elevated cutting speeds and also leads to significantly increased insert life. The cutter bodies are supplied from stock as side, shell and screw-in milling cutters, the two latter variants being equipped for internal coolant supply.
Side milling cutters range in diameter from 80 to 200mm and have cutting widths of 3, 4, 5, 6 or 8mm. As shell mills, the tools are available in diameters from 63 to 200mm and with identical grooving widths. The screw-in cutters are for a groove width of 5mm and may be ordered in diameters from 40 to 63mm as standard. The effective number of teeth depends on tool diameter and ranges from two to 13, while special surface treatment of the tool body offers protection against abrasion from chips.