Seco 00042542 Mtln Rh Indexable Turning Toolholder

Product Description

The SECO 00042542 is an MTLN-style right-hand indexable turning toolholder designed for external turning operations on CNC lathes and manual turning centers. Built from steel, it features a 1 inch by 1 inch square shank and an overall length of 6 inches. The toolholder uses a negative rake angle of -5 degrees and employs a clamp-and-pin holding method to secure TN..43. series inserts with a 1/2 inch inscribed circle. It is intended for installation and setup by machinists and CNC operators working in production or job-shop turning environments.

This toolholder is suited for external turning across a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous alloys, high-temperature alloys, and hardened materials, corresponding to ISO material groups H, K, M, N, P, and S. The -5 degree lead angle and right-hand cutting direction make it appropriate for standard straight turning and facing passes. It is part of the Multiple Lock series and accepts TN..43. inserts with a compatible insert size code of TN43. Typical applications include medium to heavy roughing and finishing cuts where insert security and repeatability are critical.

Key Features

• MTLN toolholder style with right-hand cutting direction and -5 degree lead angle
• Clamp and pin insert holding method for positive insert seating and reduced movement under load
• Compatible with TN..43. inserts featuring a 1/2 inch inscribed circle
• 1 inch by 1 inch steel shank for rigid tool post or turret mounting
• 6 inch overall length with a 1.28 inch head length and 1.25 inch back-of-bar to cutting edge dimension
• Universal primary workpiece material compatibility across ISO groups H, K, M, N, P, and S

Compatibility

Designed to accept TN..43. series indexable inserts with a compatible insert size code of TN43 and a 1/2 inch inscribed circle. Manufacturer catalog reference: MTLNR164.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Before mounting or indexing inserts, the machine spindle must be stopped and all axes must be at a safe position. The shank should be clamped securely in a tool post or turret block appropriate for a 1 inch square shank, following machine tool manufacturer torque and clamping guidelines. Inspect the insert pocket and clamping components for chips or wear before each insert change.