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Pre-Bending and Finish Rolling
PRE-BENDING is the operation where the ends of the material are bent to the same radius as
that of the finished piece. This principle is used to get the best results in full circle bending.
Before bending, follow these steps:
• Clean the material and rolls of any dust or grease.
• Make sure the edges of the piece part are free of chips and burrs.
• Check that the material is flat.
• Have a template of the finished diameter to compare with.
• Always work in the center of the rolls.
Note: Thorough cleaning of the rolls is necessary to avoid possible sliding of the
material through the rolls.
(Views A, B, C, & D are shown on the next page.)
1. Lower the rear roller to a point below the material entering the rolls, as in View "A".
2. Load the material. Using the left foot pedal, drive the piece forward to a point as in view "A".
3. Turn the two adjusting knobs (L) clockwise (cw) until you have an approximate radius to your
finished piece. See view "B"
4. Back the piece out using the right foot pedal, turn the piece part, and repeat the above
sequence for the other end. See view "C"
5. Now that you have a pre-bend on both ends, it is time to roll the final diameter.
6. Back down the rear roller and start rolling the piece forward and reverse as shown in view
"D".
7. Start raising the rear roll gradually and continue rolling the piece forward and reverse. until
you have reached the finished diameter.
8. Press on the stop bar to disengage the motor.
9. Now lower the front bottom roll so that the piece part will pull off when the top roll is slipped
out. See "Removing the Rolled Piece Part".
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