Sumitomo 19RBW0J Turning Insert CCMT21.51ENK AC830P Carbide

Product Description

The SUMITOMO 19RBW0J is a solid carbide turning insert designed for precision lathe and turning center operations. Manufactured to ANSI code CCMT21.51ENK and ISO code CCMT060204N-SK, this insert features an 80-degree diamond shape with a neutral hand orientation and a positive rake geometry. The CVD coating process applies the AC830P grade finish, optimizing wear resistance and thermal stability during metal removal. At 0.252 inches in length with a 1/4-inch inscribed circle and a 1/64-inch corner radius, this insert suits finish to semi-finish turning passes where dimensional consistency is critical. Installation is performed by licensed machinists or CNC tooling technicians using screw-style insert holding.

The 19RBW0J is suited for use in external and internal turning applications on CNC lathes and manual turning centers. The ENK chip breaker geometry and universal secondary workpiece material designation (M/P) make it appropriate for a range of ferrous materials including carbon steels, alloy steels, and cast irons. It fits toolholders designed for CCMT-style inserts with a 0.112-inch hole diameter and M-tolerance, C-clearance specifications. Typical applications include finish turning, facing, and light profiling where consistent surface finish and close tolerances are required.

Key Features

• AC830P grade CVD-coated solid carbide construction for extended tool life in steel and cast iron turning
• 80-degree diamond insert shape (Shape Code C) provides strong cutting edge geometry for stable chip formation
• ENK chip breaker promotes reliable chip control during finish and semi-finish turning passes
• Neutral hand orientation allows flexible toolholder pairing in standard CCMT setups
• Positive rake angle reduces cutting forces and heat generation at the insert edge
• Dual standard compliance with ANSI and ISO 13399 for broad toolholder compatibility verification

Compatibility

Designed as an OEM-style replacement insert for screw-clamp CCMT-style toolholders accepting a 1/4-inch inscribed circle, M-tolerance, C-clearance insert with a 0.112-inch mounting hole diameter. Compatible with toolholder systems referencing ANSI code CCMT21.51ENK or ISO code CCMT060204N-SK.

Installation Notes

Insert replacement should be performed by a qualified machinist or tooling technician. Power down and lock out the spindle before indexing or replacing inserts. Use the manufacturer-specified torque driver for the screw-clamp holding method to avoid cracking the insert or stripping the toolholder pocket. Inspect the toolholder pocket and seating surface for debris or wear before seating the new insert.