BLIND HOLE MANDRELS WITH COUNTER PRESSURE STONE SAVER FEATURE
Assemble and use in similar manner to regular B C or D Mandrels. Follow #2 below.
BCD Blind Hole stones are Cantilever type stones and must have counter pressure O ring
on opposite (inside) an of holder. This counter pressure may be varied and will prevent
much breakage on initial honing of uneven blind bores. O ring may be placed at end for
maximum counter pressure. One or more O rings may be added (not usually necessary).
Move O ring toward center for stone saver feature if hole is rough.
NOTE: Counter pressure must never be less than the pressure of stone at end. End
groove if provided is not used. Stone Pressure I Gage .Kit #ACB-51 can be used if
Assemble to BCD type adapter giving adapter 1/4 turn to lock in usual manner with wedge
slot inside adapter facing the right with screw on spindle down in the locked position.
Remember Mandrels will break if overloaded (Safety feature). Use H.S. (Heavy Service)
type Mandrels if a heavy load is to be put upon a Mandrel. Specify H.S. after part when
Range of Blind Hole Mandrel
Nominal Size of Truing 2-3/4"
1" - 1-1/4"
1-1/4" - 1-1/2"
2" - 2-1/4"
2-1/4 - 2-1/2"
All regular stones will work for a step cylinder in all mandrels.
For Blindhole use blind hole stones in Blindhole mandrels only.