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The TUNGALOY 6815315 is an insert screw designed to secure indexable carbide inserts in compatible toolholders. Insert screws are a critical hardware component in indexable cutting systems, providing the clamping force that keeps the insert seated and properly oriented during machining operations. This screw is compatible with square-shoulder end mill toolholders and is a standard consumable replacement item for machine shops and toolroom applications. At 0.1 pounds, this is a small but precisely manufactured fastener where thread integrity and dimensional accuracy directly affect insert stability and surface finish quality.
This insert screw is intended for use in indexable square-shoulder end mill tooling systems. Square-shoulder end mills are used in vertical and horizontal milling applications where 90-degree walls and flat floors are required. Insert screws in these systems are subject to torque cycling and thermal exposure during cutting, making periodic replacement a standard part of toolholder maintenance. Machinists and toolroom technicians typically keep spare insert screws on hand to avoid downtime when a screw becomes stripped or damaged.
Compatible with indexable square-shoulder end mill toolholders requiring insert screw hardware. Verify thread size and drive type against your specific toolholder before installation.
Insert screws should be installed by a qualified machinist or toolroom technician familiar with indexable tooling systems. Always remove the toolholder from the machine spindle and ensure the machine is powered down before replacing insert screws. Use the manufacturer-specified Torx or hex key to tighten the screw to the recommended seating - do not overtighten, as this can strip the screw threads or damage the toolholder pocket. Inspect the screw threads and toolholder bore for damage before each insert change.
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