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View Full Version : Installing a tapping head on a Rockwell drillpress



JCHannum
07-20-2008, 02:03 PM
At a recent auction, I ended up with a Jarvis Torqmatic tapping head. I had thought of installing a tapping head on my drillpress, but since it is a bench model, I never have since they would take up too much room.

The Jarvis is a direct mount, and happily, the mount fits my spindle, so I decided to see what was required to fit it up.

Some Rockwell models have a removeable spindle to permit installation of accessories such as mortising attachments. If you look on the left side of the drill press, there is a hole in the casting;

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Lower the quill to about half mast and peek inside and you will see a collar on top of the quill. Turn the quill until a setscrew is visible and loosen it. The drive shaft with chuck attached will drop out.

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The drive shaft on this model is 5/8" diameter and has two involute looking grooves for driving by the pullley. A 12 pitch Number 8 gear cutter very closely matched the groove, so I cut two grooves into a piece of shafting. A little creative engineering resulted in a drive flange to mate up with the tapping head. This is a picture of the new drive shaft and the original shaft with drill chuck mounted.

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The only thing to be aware of is that there is are sleeves through the bearings, and the collar has tabs to drive the upper bearing. There is a cross pin on the drive shaft to drive the lower bearing.

This is the tapping head installed, it should be a worthwhile accessory for my shop.

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Rich Carlstedt
07-20-2008, 02:45 PM
Neat work Jim !

Rich