duMONT Minute Man

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Hassay Savage

PilotPrecision.com 413-350-5200

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duMONT Minute Man

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Hassay Savage Adjustable Rotary Broach Holders

Accepts a variety of shapes, such as internal hex & square rotary broaches

Rotary Broach Holders

Use on any type CNC, manual turning, milling or screw machine. Holders and broaches are sold separately and available from stock for immediate delivery. For optimal tool life in large production settings these broaches should be used with Rotary Broach Holders. The holder has an internal live spindle, which holds the cutting broach tool. The centerline of the cutting tool is offset at 1 from the centerline of the work piece. This 1 offset causes the broach to wobble, creating a shearing effect as the broach is advanced into the work piece.

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Diagram A Diagram B

Diagram A Broaching a Rotating Work Piece

In a turning or screw machine, the holder is mounted stationary while its internal live spindle and the broach rotates after contact with the rotating work piece. At the appropriate feed, the workpiece is sheared by the pressure of the broach through a wobbling type action produc- ing the polygon shape desired.

Hassay Savage Internal Rotary Tool Holder Set-Up Procedure

1. Place the Rotary Tool Holder in the Turret (Lathe) or Tool Holder (Milling) depending on the application which fits your needs. 2. Mount the Set Up Plug or Punch Broach in the spindle of the Rotary Tool Holder and take care that the Plug or Punch is bottomed out in the spindle before tightening the set screw on the Holder's Spindle. 3. Drill and Ream a hole to the proper diameter (0.001 larger) for the Set Up Plug in a piece of raw material with a lead chamfer 0.010-0.015 larger than the cross points dimension of the Punch being used. If using the Punch Broach for centering, drill and ream the hole to the diameter of the cross point's dimension. 4. Loosen the 2 cap screws 2-3 turns on the face to generate 3/16 space between the flange portion of the Holder so that it is easily movable in the cup of your hand. 5. Advance the Rotary Tool Holder with the inserted Plug or Punch to 0.030 away from the part while holding the holder flush against the flange. 6. By hand, insert the Plug or Punch into the reamed hole. 7. Advance the turret or tool holder until the holder and tool is fully engaged in the hole 8. With the Plug or Punch still engaged in the hole, rotate the broach by hand in the hole while tightening the 2 cap screws. 9. Retract the turret or tool holder out of the reamed hole. 10. Remove the set up plug (If using one) and replace with the Punch Broach making sure the Punch Broach is bottomed out in the holder the same as in step 2. 11. See Next Page for Set-Up Plugs.

Diagram B Broaching a Stationary Work Piece

In a vertical milling or drilling machine, the holder is mounted into and rotates with the machine spindle while its internal live spindle along with the broach remains stationary upon contact with the stationary work piece. While the machine spindle is rotating, the broach's pressure shears the polygon shape into the work piece with a wobbling type action.

Adjustable Rotary Broach Holders Use with 8mm - 0.315 Broach Shank Diameters

Overall Length (inch) Holder Shank Diameter Holder Shank Length Broach Shank Depth EDP No. Hassay Savage

3-27/64 5/8 1-1/2 9/16 P-67040 3-59/64 3/4 2 P-67048S

Adjustable Rotary Broach Holders Use with 1/2 - 0.500 Broach Shank Diameters

Overall Length (inch) Holder Shank Diameter Holder Shank Length Broach Shank Depth EDP No. Hassay Savage

4-17/32 3/4 2 0.742 P-67048 1 P-67064 5-17/32 1-1/4 3 P-67068 1-1/2 P-67072

Heavy Duty Adjustable Rotary Broach Holders Use with 3/4 - 0.750 Broach Shank Diameter

Overall Length (inch) Holder Shank Diameter Holder Shank Length Broach Shank Depth EDP No. Hassay Savage

7-9/16 1-1/2 3 1.25 P-67072HDS 1-3/4 P-67076HD

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Diagram A Diagram B

Cutting Action Cutting Action 1 1