Kennametal 3871028 Indexable Grooving Toolholder Internal Rh

Product Description

The KENNAMETAL 3871028 is an internal, right-hand indexable grooving toolholder designed for precision internal grooving operations on CNC lathes and turning centers. Built on the A4 series platform, this toolholder accepts A4G0200M2SP02B inserts secured by a clamp-style holding method. It supports a maximum depth of cut of 12 mm (0.4724 inches) and a minimum groove width of 2 mm (0.0787 inches). Through-coolant capability directs cutting fluid directly to the cutting edge, improving chip evacuation and extending insert life in demanding grooving applications. Machinists and CNC operators working in job shops or production environments will find this toolholder suited for tight-tolerance internal groove work.

This toolholder is configured for internal grooving in bores with a minimum hole diameter of 17 mm (0.6693 inches) and a maximum workpiece diameter of 21 mm (0.8268 inches). The A4SS toolholder style and multi-use designation make it adaptable across a range of internal grooving scenarios, including axial and OD groove profiles within its rated envelope. It is intended for use by machinists performing precision turning and grooving operations where coolant-through tooling is specified.

Key Features

• Internal, right-hand orientation for bore grooving applications
• Through-coolant design for improved chip control and insert longevity
• Clamp-style insert retention for secure, repeatable edge positioning
• Compatible with A4G0200M2SP02B inserts (A4 series, 2S seat size)
• Multi-use tool designation allows use across varied internal grooving profiles
• Overall length of 203.5 mm (8.0118 inches) with a 162.56 mm (6.4 inches) shank length

Compatibility

Designed for use with A4G0200M2SP02B indexable grooving inserts. Insert seat size is 2S. Part of the KENNAMETAL A4 series grooving system.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. The machine spindle must be at a full stop and all drives disabled before mounting or removing the toolholder. Confirm that the coolant-through supply lines are properly connected and free of obstructions before running the through-coolant feature. Follow the machine tool manufacturer torque specifications for toolholder clamping and verify insert seating before initiating any cutting cycle.