Ukraine Train
Cast Iron
- Joined
- Feb 10, 2014
- Location
- Ohio
I'm looking at doing some secondary turning on these castings. I have an old jig that mounts in a chuck and the other side has an octagonal recess with set screws to hold the raw casting. So using this I have some options:
1) Turn larger face in the jig first then chuck on the 4.625" diameter to do the threads and 2.125" bore. The 1.502" bore needs to be done in the same op as the 4.625" diameter to maintain true position. My concern here is I'd be chucking on only 5/16" of stock for the second op.
Or:
2) Turn threaded side first then make a slug with female threads to chuck up and screw the parts into it to turn the other side. The concern with this method is the threads have a somewhat loose fit so I will have some runout between the threads and the 1.502" bore and 4.625" diameter.
I think I like option 1 better, just concerned about how short the step is for chucking for the second op. For the first op with option 1 I might be able to just chuck on the raw casting where the threads will go, depending on how straight and round it is there. Then I wouldn't have to use the jig we have for these.
1) Turn larger face in the jig first then chuck on the 4.625" diameter to do the threads and 2.125" bore. The 1.502" bore needs to be done in the same op as the 4.625" diameter to maintain true position. My concern here is I'd be chucking on only 5/16" of stock for the second op.
Or:
2) Turn threaded side first then make a slug with female threads to chuck up and screw the parts into it to turn the other side. The concern with this method is the threads have a somewhat loose fit so I will have some runout between the threads and the 1.502" bore and 4.625" diameter.
I think I like option 1 better, just concerned about how short the step is for chucking for the second op. For the first op with option 1 I might be able to just chuck on the raw casting where the threads will go, depending on how straight and round it is there. Then I wouldn't have to use the jig we have for these.