Reduced nose diameter under the flange to allow compatibility to quick change system
Taper ground to AT3 or better accuracy standard for maximum contact with spindle
Runout is less than 0.0002" from taper to end mill pocket
Made of alloy steel and hardened to HRc 58 and all critical surface is precision ground
Internal set screw is included and can be used as a stopping pin to prevent end mill or drill from sliding backwards while performing heavy cutting
Each holder comes with a lab certificate on its taper accuracy and runout measurement
In a generic standard ER collet nut, an internal ring is off-centered so that an ER collet can be easily snapped into it and holds the ER collet in place. To minimize this off-centering, SHARS ER collet nut is optimized to distribute the flat sides area to off-set the off-center
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