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The HERTEL 8000199 is a hex socket drive clamp screw designed to secure indexable inserts in boring tool holders. This small-profile fastener keeps carbide or ceramic inserts locked firmly in place during cutting operations, maintaining consistent insert positioning and preventing shift under load. At 0.38 inches in length with a 0.16-inch width and 0.16-inch height, it is purpose-built for the compact clamping mechanisms found in indexable boring systems. Machinists, tool crib technicians, and shop-floor maintenance personnel install and replace these screws as part of routine insert changes.
This clamp screw is used in indexable boring applications where a hex socket driver engages the fastener head to tighten or release the insert clamp. It is suited for production machining environments where indexable tooling sees high cycle counts and clamp screws are replaced on a regular maintenance schedule. The small overall package weight of 0.01 pounds reflects the compact form factor expected in precision boring toolholders.
Designed as an OEM-style replacement clamp screw for indexable boring toolholders that use a hex socket drive clamping mechanism.
Clamp screw replacement is performed by machinists or tool room technicians using a calibrated hex key or T-handle driver of the appropriate size. Always ensure the toolholder is removed from the machine spindle and the machine is powered down before servicing insert clamping hardware. Do not overtighten, as clamp screws in indexable tooling are precision fasteners and can strip if excess torque is applied without a torque specification reference. Inspect the mating threads in the toolholder body for wear or contamination before installing a replacement screw.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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