|INFEED OR PLUNGE TYPE|
Dies must be wider than the thread length being rolled as infeed rolling dies have
full helix angle ground into them, and there is very little part movement.
|ANNULAR RING DIES|
Annular rings are ground on dies with no helix angle. The spindles on
the machine are tilted to the same helix angle as the work causing the part to
feed through the machine. Annular ring dies can only be used were the
helix angle does not exceed the spindle tilt.
DIES (HELICAL SLOW FEED)|
For rolling long threads with high helix angles, part of the helix angle
is ground into the dies and the rest of the helix angle is tilted on the
machine's spindles. (Combination dies use less power and rolling pressure than
annular ring dies.)
|SPEED-UP DIES (HELICAL FAST FEED)|
For rolling long threads, bars feed through the machine 1-1/2 to 3 times
faster than annular ring dies at the same RPM.
Most thread forms can be rolled. Standard
"V", ACME, Butress, Worms, Balls, ect.
Knurling, straight and diamond, grooving, annular rings or helical such as oil grooves. Burnishing for smooth finish
and increased strength.