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| ieezitin:
Flux. Couple of ways to remove the stubborn bush. Drill it out with step sizing drills ( drills slightly larger than the last drill used) and leave just a slight shell then ping out with a Cole chisel. Stick it on the face plate and machine it out. That way your boring out to a given size and making a nice fit for the new bush. Or drill a hole of about 7/16 then use a hacksaw blade to notch it out, run the cuts parallel along its axis then whack out with the chisel again. The objective being to make it collapse. All the best. Anthony. |
| TriHonu:
Fluxcored to accurately take smaller cuts you have to use the compound. Picture this: 1. If the compound is set so it pointed away from the operator (90 degrees to the axis of rotation) a turn the compound screw one division and the tool will advance .0005 in and will remove .001 inch from the diameter. 2. If you turn the compound 90 degrees so it is pointing at the chuck. If you turn the compound dial 1 division, the tool will move .0005 toward the chuck. It will not move any closer to the axis of rotation so it will not remove any material from part. 3. There is some setting on the compound between these two settings that will allow you to turn the compound feed 1 division (.001 inch) that will remove .01 mm. If my math is correct the compound angle you want is 23 degrees. Start with the compound pointing at the chuck. Turn it clockwise 23 degrees and lock it down. Make a cut. Measure the diameter. Advance the compound 1 division. Take another cut. If you are using a sharp finishing tool, you should remove .01 mm. :thumbup: On an Imperial lathe, setting the compound 6 degrees from parallel to the axis of rotation will remove .0001 from the diameter for each .001 advancement of the compound. Setting the compound at 30 degrees will remove .0005 from the diameter for each .001 advancement of the compound. |
| dsquire:
--- Quote from: TriHonu on April 20, 2010, 01:20:50 AM ---Fluxcored to accurately take smaller cuts you have to use the compound. Picture this: 1. If the compound is set so it pointed away from the operator (90 degrees to the axis of rotation) a turn the compound screw one division and the tool will advance .0005 in and will remove .001 inch from the diameter. 2. If you turn the compound 90 degrees so it is pointing at the chuck. If you turn the compound dial 1 division, the tool will move .0005 toward the chuck. It will not move any closer to the axis of rotation so it will not remove any material from part. 3. There is some setting on the compound between these two settings that will allow you to turn the compound feed 1 division (.001 inch) that will remove .01 mm. If my math is correct the compound angle you want is 23 degrees. Start with the compound pointing at the chuck. Turn it clockwise 23 degrees and lock it down. Make a cut. Measure the diameter. Advance the compound 1 division. Take another cut. If you are using a sharp finishing tool, you should remove .01 mm. :thumbup: On an Imperial lathe, setting the compound 6 degrees from parallel to the axis of rotation will remove .0001 from the diameter for each .001 advancement of the compound. Setting the compound at 30 degrees will remove .0005 from the diameter for each .001 advancement of the compound. --- End quote --- TriHonu :D :D :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :ddb: :D :D Congratulations TriHonu. When you joined up to MadModder this morning you became the 1000 th member to join up. Perhaps you could start a new post in the "Introductions" thread and tell us a bit about yourself and your projects. From the sound of this post I am sure that you must know your way around a lathe very well and probably other machines as well. I hope that you enjoy the forum and if you have any questions just ask, there is always someone around to answer or at least give and opinion. :ddb: :ddb: Cheers :beer: Don |
| fluxcored:
:( I have'nt touched this project for quite a while now. Been focusing on a few other tasks. I've finished my ...forge..., if you can call it that and plan to heat the pulley to see if I can remove the stuck bush that way. Hopefully it will not warp the pulley. Anthony, I would like chuck it on the lathe and to machine it out but it's too big for my lathe. Hacksaw and chisel is what I'll use next if heat does'nt help. TriHonu, I guess I understand what you're saying. I'll play around and report back. Cheers and Thx. |
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