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The ACCUPRO 40278723 is a T20 Torx wrench designed for use with CI series grooving toolholders that accept indexable inserts. Built from steel, this wrench provides the precise torque engagement needed to seat and secure indexable cutting inserts in grooving toolholder hardware. At 96.00 millimeters overall length and weighing 0.27 pounds, it is a compact, purpose-built tool kept in a tech's kit for insert changes at the machine. Licensed machinists and CNC toolroom technicians are the primary users of this wrench during routine insert indexing and replacement operations.
This wrench is intended for use with CI series grooving toolholders that use T20 Torx fastener hardware to retain indexable inserts. It is suited for production turning, grooving, and parting operations where insert changes are frequent and proper seating torque is critical to tool life and part quality. The single-piece steel construction keeps the drive end rigid under repeated use in shop environments.
Designed for use with CI series grooving toolholders that require T20 Torx hardware for indexable insert retention. Compatible hardware type is listed as toolholder fasteners within the CI series.
Insert changes on indexable toolholders should be performed with the machine powered down and the spindle locked or secured. Use only the correct Torx size to avoid fastener damage — substituting a close-fitting driver can strip the screw head and require toolholder disassembly. Follow the toolholder manufacturer's recommended insert seating procedure and do not apply excessive torque beyond the specified insert screw rating. Handle indexable inserts with care to avoid edge chipping during installation.
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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