Iscar 2850058 Internal Grooving Toolholder 0.31in 1in Shank

Product Description

The ISCAR 2850058 is a right-hand internal indexable grooving toolholder in the Top Grip series, designed for non-face internal grooving operations on CNC lathes and turning centers. It accepts TGMF-style inserts secured by a clamp-style insert holding method, delivering a fixed groove width of 0.118 inches and a maximum depth of cut of 0.31 inches. The 1-inch cylindrical shank provides rigid setup in live-tool or static boring bar holders, and the through-coolant feature directs cutting fluid directly to the insert tip for improved chip evacuation and tool life in demanding grooving cycles. Licensed machinists and CNC turning specialists install this toolholder in production and job-shop environments.

The 2850058 is suited for internal grooving in bores with a minimum hole diameter of 1.26 inches. Its 7.85-inch overall length and 6.28-inch shank length accommodate reach requirements in deeper bores. The toolholder is rated for universal primary workpiece material compatibility, covering ISO material groups H, K, M, N, P, and S, making it applicable across steel, stainless, cast iron, non-ferrous, heat-resistant superalloys, and hardened materials. Typical applications include snap-ring grooves, undercuts, and bore profiles on production turning equipment.

Key Features

• Right-hand cutting direction with TGI-style internal non-face grooving configuration
• Through-coolant capability for direct flood cooling at the cutting edge
• Clamp-style insert retention compatible with TGMF, TGMA, and TGMF/P insert families
• Fixed 0.118-inch groove width and 0.31-inch maximum depth of cut
• 1-inch shank diameter with 6.28-inch shank length for stable reach in deep bores
• Conforms to ISO 13399 tooling data standards for integration with CAM and presetter systems

Compatibility

Compatible insert codes include TGMA, TGMF, and TGMF/P; complete insert compatibility covers the TGMF 3 series. Requires a minimum bore diameter of 1.26 inches for internal grooving operations.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the control is in E-stop or lockout/tagout state before changing toolholders. Verify shank bore fit and clamp torque per the machine tool manufacturer specifications before running. Confirm through-coolant passages are clear and the machine coolant system is connected and pressurized to spec before initiating a cutting cycle.