Kennametal 1094521 Sdjc Indexable Turning Toolholder

Product Description

The KENNAMETAL 1094521 is a right-hand SDJC-style indexable turning toolholder designed for external turning operations on CNC and manual lathes. It features a neutral rake geometry with a 0-degree rake angle and a screw-on insert clamping method that provides secure, repeatable insert seating. The 0.5-inch by 0.5-inch steel shank gives it a compact, rigid profile suited for tight tool post clearances. At 3.5 inches overall length, this toolholder accepts DC..21.5. series inserts with a 0.25-inch inscribed circle. It is installed by machinists and CNC operators in production and job-shop turning environments.

This toolholder is used in external turning applications where a neutral rake angle is required for balanced cutting forces. The 3-degree lead angle positions the insert for general-purpose turning across a range of ferrous and non-ferrous workpiece materials. The back-of-bar to cutting edge measurement is 0.625 inches, which determines centerline positioning on the lathe. Typical applications include facing, straight turning, and light contouring on parts held in a chuck or between centers. No coolant-through capability is present, so external flood or mist coolant delivery is standard practice for this holder.

Key Features

• Right-hand SDJC toolholder style with 3-degree lead angle and neutral rake
• Screw-on insert clamping method for secure, low-profile insert retention
• Accepts DC..21.5. series inserts with 0.25-inch inscribed circle
• Steel shank construction for rigidity and durability
• Compact 0.5 inch x 0.5 inch shank fits standard tool posts and turrets
• 3.5-inch overall length with 0.62-inch head length

Compatibility

Designed for use with DC..21.5. series indexable inserts, specifically compatible with DC.. 21.51 insert geometry per Kennametal catalog designation SDJCR L082.

Installation Notes

Installation is performed by machinists working on CNC turning centers or manual engine lathes. The machine spindle must be brought to a full stop and the turret or tool post de-energized before mounting or changing the toolholder. Ensure the insert pocket and clamping screw threads are clean and free of chips before seating a new insert. Torque the clamping screw using the appropriate Kennametal torx or hex key as specified in the insert manufacturer documentation for this insert style.