Danny VanVoorn
Titanium
- Joined
- Nov 3, 2002
- Location
- St.Louis, Missouri, USA
I always liked the Greenerd design presses, worked in quite a few shops in my life and most had at least one that was older than me still in service (this one is a Dumont). This press I bought had some abuse that was obvious from the onset, price was about 1/4" what all others were asking so I went for it. Internet purchase and what I found after taking possession besides the over stressed handle was the bore the pinion rides in had about an .050" step worn in one end. A better description would be torn out by the teeth on the pinion gear. Anytime I put some pressure on it I could visually see the hand wheel lifting and moving away from the rack, this was eventually going to break a tooth on a gear or worse. A picture of the press as received.
I decided it needed to be bored OS and a bushing installed so I set it on the horizontal mill table and started lining things up. I used the edge of the rack to align it 90 degrees to the spindle and a surface gage to level the pinion shaft to the table top, a lot of loosening and moving it around before it was right. Finally lined up, ready to go after making sure the three clamps were tight again.
The pinion didn't go all the way through and had a smaller diameter turned on it for the hand wheel and collar that didn't touch about .200" of the original bore. That was the end I was working on so all I had to do to center that with the spindle was indicate using that as a reference.. A picture set up to finally get the job done.. I didn't have any idea on how big to go over size but knew I wanted as much of the pinion supported as original depth wise. I decided ,200" per side and if that added a shoulder to the bottom of the bore then I'd use that to keep the bushing in place and out of the rack, if not I'd add a shoulder to the bushing. It all went pretty smooth and I managed to add a little bit of extra width to better support that end of the pinion. The new material added before tightening the collar in place
The machine had a couple of other things that needed to be addressed, one was the ratchet pawl was hanging up. Unbelievable how long it took to figure out that the slot for the lifting pin was not centered well enough and needed some clearance added. I want find out what the correct handle length should be also, something tells me that the one bent like a pretzel isn't original?
Dan
I decided it needed to be bored OS and a bushing installed so I set it on the horizontal mill table and started lining things up. I used the edge of the rack to align it 90 degrees to the spindle and a surface gage to level the pinion shaft to the table top, a lot of loosening and moving it around before it was right. Finally lined up, ready to go after making sure the three clamps were tight again.
The pinion didn't go all the way through and had a smaller diameter turned on it for the hand wheel and collar that didn't touch about .200" of the original bore. That was the end I was working on so all I had to do to center that with the spindle was indicate using that as a reference.. A picture set up to finally get the job done.. I didn't have any idea on how big to go over size but knew I wanted as much of the pinion supported as original depth wise. I decided ,200" per side and if that added a shoulder to the bottom of the bore then I'd use that to keep the bushing in place and out of the rack, if not I'd add a shoulder to the bushing. It all went pretty smooth and I managed to add a little bit of extra width to better support that end of the pinion. The new material added before tightening the collar in place
The machine had a couple of other things that needed to be addressed, one was the ratchet pawl was hanging up. Unbelievable how long it took to figure out that the slot for the lifting pin was not centered well enough and needed some clearance added. I want find out what the correct handle length should be also, something tells me that the one bent like a pretzel isn't original?
Dan