Description
Sherline Boring Head Adjustment Dial 31570
Boring Head Adjustment Dial
This Sherline part was designed to work with the Sherline boring head part numbers 3054 and 3049 in metric calibration.
Tighten the dial to increase diameter. To reduce diameter, loosen the 10-32 and 4-40 screws and slide back.
One turn of the 4-40 screw dial will produce an increase of .050″ in the bored diameter. Each increment on the dial is 7.2° which produces a rotation of the screw equivalent to .001″ in the bored diameter.
Major increments are marked on the dial at 10 (.010″), 20 (.020″), 30 (.030″), 40 (.040″) and 0 (.050″).
The boring head is NOT included and is sold separately. This dial is a replacement part for the Sherline 3054/3049 boring head.
