Kennametal 1957226 Grooving Cutoff Toolholder Right Hand

Product Description

The KENNAMETAL 1957226 is an indexable grooving and cutoff toolholder designed for external grooving operations on CNC lathes and turning centers. Built to the A4SM toolholder style, it accepts A4..04.. series inserts held in place by a clamp-style insert retention method. The holder is configured for right-hand cutting and delivers a minimum groove width of 4 mm (0.157 inches) with a maximum depth of cut of 17 mm (0.670 inches). The square shank measures 1-1/4 x 1-1/4 inches, making it compatible with standard lathe tool blocks and quick-change tooling systems. Machinists and toolroom technicians working in production and job-shop environments rely on this holder for consistent, repeatable grooving and parting operations.

This toolholder is suited for external grooving and cutoff applications on workpieces held in manual or CNC turning equipment. The A4SM series geometry supports a range of groove-width insert configurations within the A4..04.. insert family, giving operators flexibility across multiple groove profiles without changing the holder body. Typical applications include OD groove machining, snap-ring groove cutting, and parting operations on ferrous and non-ferrous materials in both production and prototype environments. No coolant-through capability is present on this holder, so external coolant delivery should be used when thermal management is required.

Key Features

• Right-hand external grooving and cutoff orientation for standard lathe setups
• Clamp-style insert holding for secure, repeatable insert indexing
• Accepts A4..04.. series inserts for multiple groove-width configurations
• Minimum groove width of 4 mm (0.157 inches) and maximum depth of cut of 17 mm (0.670 inches)
• 1-1/4 x 1-1/4 inch square shank fits standard lathe tool blocks and quick-change systems
• Overall length of 152.40 mm (approximately 6 inches) for clearance in typical turret setups

Compatibility

Designed for use with A4..04.. series indexable grooving inserts as specified by Kennametal for the A4 toolholder series. Insert seat size is 4.0. No additional specific machine model compatibility data was provided in the product information.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine powered down and all motion axes at rest. Secure the shank fully within the tool block or quick-change holder, ensuring the specified shank engagement depth is met to prevent deflection under cutting loads. Verify insert seating and clamp torque per the insert manufacturer guidelines before commencing cuts. Because this holder does not feature coolant-through capability, position external coolant nozzles appropriately to manage heat at the cutting zone during grooving or parting operations.