- Joined
- Dec 6, 2012
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- 2,677
The auto oiler on the WWII era lathe I'm rebuilding was dropped at some point damaging the apron and the auto oiler assembly. Many of the parts are missing, including the rack driven spur gear and the eccentric which pumps the OEM Bijur pump shown in the pic. This Bijur pump still works well when the plunger is pressed. However, I need to make the mechanism which presses the plunger.
Near as I can tell these mechanical oilers came in two configurations. One was driven off the rack when the saddle traversed the length of the bed. Thus, if short work was being turned nothing got oiled. Alternatively, the other design was a hand crank. Thus, if the operator didn't occasionally spin the crank nothing got oiled.
Regardless, of which I make, and install both will need an eccentric to push and release the plunger.
I'm hoping for advise on a several things.
A. First looking for advise on the design of the eccentric. The options which I envision are:
1) A wafer of Round stock with an offset hole to accommodate a drive shaft.
2) A ellipse.
3) A cam. Basically an ellipse with more of a point.
I think option 1) might be the easiest to make. However, I'm wondering if there are benefits to the 2) & #3 as they would release faster. But, I'm not sure if that is a benefit. If it is determined I should make 2) or 3), then I'll be looking for advise on how to make them.
B. Given my original description of features/benefits in the opening lines above, I'm leaning toward the hand crank, and am wondering if anyone has strong opinions one way or the other. I believe that once I get the eccentric figured out, both of these design options are very doable.
Thanks for any/all advise!!
No that is not my braze work holding the apron together.
Daryl
MN
Near as I can tell these mechanical oilers came in two configurations. One was driven off the rack when the saddle traversed the length of the bed. Thus, if short work was being turned nothing got oiled. Alternatively, the other design was a hand crank. Thus, if the operator didn't occasionally spin the crank nothing got oiled.
Regardless, of which I make, and install both will need an eccentric to push and release the plunger.
I'm hoping for advise on a several things.
A. First looking for advise on the design of the eccentric. The options which I envision are:
1) A wafer of Round stock with an offset hole to accommodate a drive shaft.
2) A ellipse.
3) A cam. Basically an ellipse with more of a point.
I think option 1) might be the easiest to make. However, I'm wondering if there are benefits to the 2) & #3 as they would release faster. But, I'm not sure if that is a benefit. If it is determined I should make 2) or 3), then I'll be looking for advise on how to make them.
B. Given my original description of features/benefits in the opening lines above, I'm leaning toward the hand crank, and am wondering if anyone has strong opinions one way or the other. I believe that once I get the eccentric figured out, both of these design options are very doable.
Thanks for any/all advise!!
No that is not my braze work holding the apron together.
Daryl
MN