Criterion 3F-HB Boring & Facing Head 3/4 Bar Capacity No Etchings Excellent

  
Criterion 3F-HB Boring & Facing Head 3/4 Bar Capacity No Etchings Excellent. Takes a 1 1/2-18 threaded shank. I went ahead and disassembled and cleaned.

Re assembled and lightly lubricated. Please review all photos to determine condition and identification.

The 3FHB is the ideal tool for performing those difficult facing, grooving, backfacing and counterboring operations on work pieces too large to turn or too bulky to handle safely. Automatic feed is in the forward mode and is actuated by holding a knurled feed-ring. To return to starting position a hex wrench is inserted in the end of the micrometer screw and manually reversed.

The 3FHB features a gear drive that generates a continuous feed rate of. To prevent damage to the gear train, a specially designed detent clutch automatically disengages when a pre-set stop is reached or when cutting pressures become excessive.

A 1-1/2-18 threaded back permits the use of any of the 1-1/2-18 threaded shanks.