BadDog
Stainless
- Joined
- Mar 27, 2006
- Location
- Phoenix, AZ
I'm almost done with my surface grinder "kit". Only one significant job remains, removing the table traverse (left right) pinion shaft, located on the left side of the saddle. This is an older “Deluxe” rather than a “Challenger”, so the manual available here and elsewhere is of little use.
As far as I can tell, there are no remaining grub screws. There is a threaded hole top front and bottom rear that appear to have brass at the bottom? Maybe that’s bronze bushing down there? Or the holes may have brass plugs? No idea, but there is no screw in them. I might could figure out what they are if I could take it apart.
The front “bearing” appears to be a shielded roller of some sort, but seems to work fine with no slop. The rear, which seems to be a bronze bearing is worn, giving some 15-20 thou or more slop. There is no visible aid to removing either, but the front bore is considerably larger and it appears the shat must come out the front. The Challenger diagrams indicate other internal bearings, but some stuff is obviously different, no idea how similar or different they may be, but even the Challenger manual seems to offer no help on disassembly.
The shaft pulls toward the operator to disengage the pinion from the rack and allow you to index the graduated handle (no slip ring) to a convenient spot. An internal spring holds the pinion into the rack normally. This spring bears on a collar that is held in place with a roll pin, and I think the shaft itself might come on through if I could only remove that roll pin. There is an access port with a large slotted screw/plug that allows me to see it from the side, but the bore itself has no provision/clearance for diving the pin out. The collar clears the bore by only about 0.090 and driving it at all off center results in the pin dragging around the bore as you try to turn it. I was told by someone on another board that you drive that pin back, rotate the extended side to the front, and then pull out with needle nose, but that seems impossible on mine.
Anyone got any thoughts or experience with this part of the grinder? I know it’s a long shot, but I’m stumped. Other than just “beat the f@#$ out of it and drive it out whether it likes it or not”, I’m out of ideas...
As far as I can tell, there are no remaining grub screws. There is a threaded hole top front and bottom rear that appear to have brass at the bottom? Maybe that’s bronze bushing down there? Or the holes may have brass plugs? No idea, but there is no screw in them. I might could figure out what they are if I could take it apart.
The front “bearing” appears to be a shielded roller of some sort, but seems to work fine with no slop. The rear, which seems to be a bronze bearing is worn, giving some 15-20 thou or more slop. There is no visible aid to removing either, but the front bore is considerably larger and it appears the shat must come out the front. The Challenger diagrams indicate other internal bearings, but some stuff is obviously different, no idea how similar or different they may be, but even the Challenger manual seems to offer no help on disassembly.
The shaft pulls toward the operator to disengage the pinion from the rack and allow you to index the graduated handle (no slip ring) to a convenient spot. An internal spring holds the pinion into the rack normally. This spring bears on a collar that is held in place with a roll pin, and I think the shaft itself might come on through if I could only remove that roll pin. There is an access port with a large slotted screw/plug that allows me to see it from the side, but the bore itself has no provision/clearance for diving the pin out. The collar clears the bore by only about 0.090 and driving it at all off center results in the pin dragging around the bore as you try to turn it. I was told by someone on another board that you drive that pin back, rotate the extended side to the front, and then pull out with needle nose, but that seems impossible on mine.
Anyone got any thoughts or experience with this part of the grinder? I know it’s a long shot, but I’m stumped. Other than just “beat the f@#$ out of it and drive it out whether it likes it or not”, I’m out of ideas...