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The ACCUPRO 777802 is a spanner-style collet chuck wrench designed for tightening and loosening 3/4 inch milling chucks on CNC and manual milling machines. The spanner design provides controlled torque engagement at the chuck body, helping machinists secure or release collet assemblies without damaging the chuck nose or spindle interface. At 1 pound, it is light enough for bench and machine-side use without adding unnecessary fatigue during frequent tooling changes. This wrench is a purpose-built tool intended for use by machinists, toolroom technicians, and CNC operators working with 3/4 inch milling chuck assemblies.
This wrench is suited for machine shop environments running 3/4 inch milling chucks in toolholding applications. It is appropriate for production machining, toolroom work, and maintenance settings where consistent chuck engagement is required. Sold individually, it is a direct addition to a machinist's tooling wrench set for this specific chuck size.
Designed for use with 3/4 inch milling chucks. No additional compatible model numbers or system families were specified in the product data.
This wrench is used by machinists and toolroom technicians during toolholder setup and changeout procedures. Always ensure the machine spindle is fully stopped and power is locked out before engaging or disengaging the milling chuck. Use the spanner wrench only on the designated chuck engagement points to avoid damaging the chuck body or collet bore. Follow the chuck manufacturer's torque guidelines for proper collet retention.
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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