Seco 00013855 Mten Neutral Indexable Turning Toolholder

Product Description

The SECO 00013855 is a neutral-hand MTEN-style indexable turning toolholder designed for external turning operations on CNC and manual lathes. Built from steel with a 0.625-inch square shank and an overall length of 4.5 inches, this toolholder accepts TN..33. series inserts secured by a clamp-and-pin holding method, part of SECO's Multiple Lock clamping system. The negative rake geometry at -10 degrees suits hard and interrupted cuts where edge strength is the priority. The neutral cutting direction makes it compatible with both right- and left-hand turning setups, giving shops flexibility in fixturing and approach.

This toolholder is rated for universal workpiece materials, covering ISO material groups H, K, M, N, P, and S. That range spans cast iron, non-ferrous alloys, stainless steel, steel, and superalloys, making it a practical single-holder solution for job shops running varied material types. It is intended for professional machining environments where insert indexability, repeatability, and rigid clamping are required for consistent surface finish and dimensional accuracy across production runs.

Key Features

• MTEN toolholder style with neutral hand for flexible right- or left-hand turning
• Negative rake angle of -10 degrees for increased edge strength on demanding cuts
• Clamp-and-pin insert retention for rigid, repeatable insert positioning
• Accepts TN..33. inserts with a 0.375-inch inscribed circle
• Compatible with ISO material groups H, K, M, N, P, and S
• Steel construction for durability in production turning environments

Compatibility

Designed to accept TN..33. series indexable inserts with a compatible insert size code of TN33 and an inscribed circle of 0.375 inches. Suited for universal turning applications across a wide range of workpiece materials per ISO classifications H, K, M, N, P, and S.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the toolholder. Set the toolholder centerline height precisely to spindle centerline before tightening into the tool post or turret. Follow the machine tool manufacturer's torque and clamping specifications for the turret or tool post hardware. Do not operate without the insert and clamp properly seated and secured per SECO toolholder instructions.