TANGI-SQUARE HOLLOW MILLS FOR DAVENPORT, CNC AND OTHER SCREW MACHINES INSTRUCTIONS

IMPORTANT:

FOR HOLLOW MILL TO FUNCTION AS DESIGNED THE FOLLOWING RULES MUST BE OBSERVED:

WHEN MAKING DIAMETER ADJUSTMENTS, LOCKING RING (PT. 7) MUST BE SNUG, BUT NOT SO TIGHT THAT INSERT SLIDES CAN NOT BE ADJUSTED FOR DIAMETER.

DIAMETER ADJUSTMENTS OF THE MICROMETER SCREW (PT. 8) MUST BE MADE IN THE CLOCKWISE DIRECTION (CLOSING DOWN) SO AS TO ELIMINATE BACKLASH.

TAKE A TRIAL CUT.  IF ALL THREE INSERTS ARE CUTTING THE TRIAL DIAMETER THE TOOL IS ON CENTER.  IF ALL THREE INSERTS ARE NOT CUTTING THE TRIAL DIAMETER, LOOSEN (PT. 14) AND ADJUST THE MICROMETER SCREW (PT. 8) UNTIL ALL THREE INSERTS ARE TOUCHING THE TRIAL DIAMETER.  TIGHTEN (PT. 14) AND MAKE THE ACTUAL REQUIRED DIAMETER ADJUSTMENT.

WHEN CORRECT DIAMETER IS ATTAINED LOCKING RING MUST BE FULLY TIGHTENED USING THE SPANNER WRENCH (PT. 18) PROVIDED.

TO INTERCHANGE INSERT SLIDES:

REMOVE STOCK STOP PLATE (PT. 20) BY REMOVING TWO SCREWS (PT.21) IF APPLICABLE.

LOOSEN LOCKING RING (PT. 7) WITH SPANNER WRENCH (PT. 18) PROVIDED.

UNTHREAD LOCKING RING (PT. 7) COMPLETELY AND REMOVE.

REMOVE 3 SLIDE CLAMPS (PT. 4) AND 3 INSERT SLIDES (PT. 5 OR 5A).

REPLACE WITH DESIRED SIZE INSERT SLIDE (SLIDES ARE MARKED WITH DIAMETER RANGE) BEING CERTAIN THAT SLIDE PIN IS THE SCROLL GROOVE AN SLIDE IS PROPERLY SEATED IN DOVETAIL.

REPLACE 3 SLIDE CLAMPS.  REINSTALL LOCKING RING AND TIGHTEN UNTIL IT IS SNUG, BUT NOT SO TIGHT THAT INSERT SLIDES CAN NOT BE ADJUSTED FOR DIAMETER.

ADJUST SLIDES TO .010" TO .015" LARGER THAN DESIRED DIAMETER BY ROTATING MICROMETER SCREW (PT. 8) AND CLOSING INSERT SLIDES DOWN ON A ROD OR GAGE OF THAT DIAMETER.

BE SURE THAT LOCKING RING IS VERY SNUG AND TAKE A TRIAL CUT.  MEASURE TURNED DIAMETER AND MAKE FURTHER ADJUSTMENTS AS NECESSARY UNTIL DESIRED DIAMETER IS ATTAINED.  THEN FULLY TIGHTEN LOCKING RING USING THE SPANNER WRENCH PROVIDED.

NOTE THAT EACH LINE ON MICROMETER SCREW = .001" ON DIAMETER (.0005" ON THE SIDE), AND THAT ALL THREE INSERT SLIDE ARE ADJUSTED SIMULTANEOUSLY.

WARNING: LOCKING RING (PT. 7) MUST BE FULLY TIGHTENED WHEN MACHINE IS IN OPERATION.