Accupro 0166180/0166181 R8 End Mill Holder Set 8pc

Product Description

The ACCUPRO 0166180/0166181 is an eight-piece end mill holder set built around the R8 taper standard. The set covers hole diameters from 3/16 inch to 1-1/4 inch, giving machinists a single purchase that handles the most common shank sizes encountered in a general-purpose machine shop. R8 taper holders are the standard spindle interface for Bridgeport-style vertical knee mills and many comparable knee-mill platforms. The set ships as a matched collection, reducing the need to source individual holders of varying bore sizes and ensuring consistent runout performance across a full range of end mill shanks.

This holder set is suited for job shops, tool rooms, and production environments running R8-spindle vertical milling machines. Typical applications include face milling, slotting, profiling, and pocket milling operations where frequent tool changes across multiple shank diameters are common. The eight included holders allow a machinist to set up multiple tools simultaneously, minimizing downtime between operations. The 3/16 inch through 1-1/4 inch diameter range covers light-duty finishing end mills up to large-diameter roughers in one set.

Key Features

• R8 taper interface for compatibility with Bridgeport-style vertical knee mills
• Eight holders included, spanning 3/16 inch to 1-1/4 inch bore diameters
• Full bore range supports both small finishing tools and large roughing end mills
• Set format eliminates the need to purchase individual holders separately
• UNSPSC Code 27112809 for procurement and catalog classification

Compatibility

Designed for use with R8-taper vertical milling machine spindles. No specific machine model compatibility beyond the R8 taper standard was provided in the product data.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the milling machine before installing or removing any tool holder from the spindle. Ensure the spindle bore and holder taper are clean and free of chips or oil film before seating the holder to maintain accurate runout. Tighten the drawbar to the machine manufacturer's specified procedure using the appropriate wrench; do not use air impact tools on the drawbar.