- Joined
- Nov 9, 2015
- Messages
- 429
I waited a long time for an old Craftsman floor model drill press to show up on Craig's List. Finally I found a nice one that needed only pulley shaft bearings.
But I soon understood exactly what others have said - the table is very difficult to raise and lower due to its weight, plus the table lacked the tilt feature. So I did the research on what others have done and decided to wait until a "junk" drill press showed up on CL that had a table lift mechanism that could be modified to fit the Craftsman.
A few photos of the retrofitting process are shown below.
Here is the CL photo of the Craftsman drill press I purchased about a year ago.
Here is the donor, a "King," built by King Kong Ltd (Taiwan). Sadly it had been stored outside for years. But the table lift mechanism still worked. Unfortunately the diameter of the donor column is 80mm (3.15") vs. the Craftsman, which has a 2.75" column.
The question was how to make the donor lift mechanism fit? Here is a close-up of the donor mechanism. In order to remove the gear, we had to mill away the body filler, then press out the gear shaft.
To reduce the diameter of the donor, we turned two reducing rings out of 4140. Then in order for the worm, gear, and rack to work, we had move the gear and worm closer to the column in order to engage the rack. Here is a photo of the modified donor. You can see the reducing rings pinned to the casting, and also how we enlarged the gear shaft bore, pressed in a slug of 4140, then drilled a new bore in the proper location. Here is the modified donor.
Then we had to modify the Craftsman table to fit the donor lift mechanism. Here is the stock Craftsman table.
Here is the modified table. Not wanting to mess with welding or brazing cast iron, we welded up a one inch thick 1018 disk to 3/8" flat bar then assembled it to the table with cap screws and a couple of hex bolts.
And the underside.
And finally a close-up of the "King" donor mechanism installed on the Craftsman drill press.
A full view.
But I soon understood exactly what others have said - the table is very difficult to raise and lower due to its weight, plus the table lacked the tilt feature. So I did the research on what others have done and decided to wait until a "junk" drill press showed up on CL that had a table lift mechanism that could be modified to fit the Craftsman.
A few photos of the retrofitting process are shown below.
Here is the CL photo of the Craftsman drill press I purchased about a year ago.
Here is the donor, a "King," built by King Kong Ltd (Taiwan). Sadly it had been stored outside for years. But the table lift mechanism still worked. Unfortunately the diameter of the donor column is 80mm (3.15") vs. the Craftsman, which has a 2.75" column.
The question was how to make the donor lift mechanism fit? Here is a close-up of the donor mechanism. In order to remove the gear, we had to mill away the body filler, then press out the gear shaft.
To reduce the diameter of the donor, we turned two reducing rings out of 4140. Then in order for the worm, gear, and rack to work, we had move the gear and worm closer to the column in order to engage the rack. Here is a photo of the modified donor. You can see the reducing rings pinned to the casting, and also how we enlarged the gear shaft bore, pressed in a slug of 4140, then drilled a new bore in the proper location. Here is the modified donor.
Then we had to modify the Craftsman table to fit the donor lift mechanism. Here is the stock Craftsman table.
Here is the modified table. Not wanting to mess with welding or brazing cast iron, we welded up a one inch thick 1018 disk to 3/8" flat bar then assembled it to the table with cap screws and a couple of hex bolts.
And the underside.
And finally a close-up of the "King" donor mechanism installed on the Craftsman drill press.
A full view.
