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Coning The Tubing
1. Place the body of the hand coning tool in a suitable vise. The crank handle end of the tool should be
elevated slightly so that the lubricant can flow down the lubrication channel to the cutter head. Be sure to
provide adequate clearance for the rotation of the crank handle.
2. Fully retract the cutter blades past the access window by turning the knurled nut counter-clockwise.
3. Loosen the gland at the front of the tool and insert the tube. The end of the tube should be even with the
front of the access window (nearest the cutter blade), but should not contact the cutter blade.
4. Tighten the gland holding the tube.
5. Apply a liberal amount of lubricant to the exposed end of the tube, the cutter blades, and through the
lubrication channel at the crank handle. Important: Apply lubricant frequently and liberally throughout the
6. Turn the knurled nut clockwise to gently touch the cutter blade to the tube, then back the knurled nut off
7. Crank the handle clockwise to spin the cutter blades. Turn the knurled nut clockwise to engage and to begin
cutting the tube. For best results, establish a gentle but constant feed of the knurled nut and a smooth
continuous cutter rotation. Do not try to remove too much material at once. Let the cutter blades do the work.
Thin, curled machining chips should fall freely from the lower access window. Note: Back the cutter blades off
the work-piece before interrupting the cut. Use compressed air or a small brush to clean the accumulation of
chips from the blades and work-piece through the coning operation. The operation is complete when the
blades begin to cut the land area at the base of the cone.
8. Back the cutter blades off the work-piece and loosen the gland to remove the tubing. Inspect the cone for
completeness and surface finish.