I have seen some parts lately that call for a Ra32 finish (4140). I cant find any info on improving surface finish with scotch brite pads or emery cloth.
The parts are not aerospace so I believe the finish is more cosmetic. I do not have a profilometer and I do not know if the customer does either. I know I can make the finish look acceptable from polishing but am not sure if a profilometer would agree with visual inspection.
Most things I read online have cemet inserts with cnc machines. I have none. Just manual lathes/Brownies. I want to know if anyone has experience trying to polish by hand with good results.
I have seen some of these automotive parts over the last year have some Ra32 callouts. If its on the O.D. its no big deal as I can have it centerless ground.
I am not sure if I should be passing on these jobs or if I should have at it. Any advice would be greatly appreciated.
Most of these parts would be 2nd op on a DV-59. I do have a grinding wheel attachment for a lathe but I have never seen it hooked up. I dont know if I can get it to mount on my DV-59 effectively.
Thanks in advance.
The parts are not aerospace so I believe the finish is more cosmetic. I do not have a profilometer and I do not know if the customer does either. I know I can make the finish look acceptable from polishing but am not sure if a profilometer would agree with visual inspection.
Most things I read online have cemet inserts with cnc machines. I have none. Just manual lathes/Brownies. I want to know if anyone has experience trying to polish by hand with good results.
I have seen some of these automotive parts over the last year have some Ra32 callouts. If its on the O.D. its no big deal as I can have it centerless ground.
I am not sure if I should be passing on these jobs or if I should have at it. Any advice would be greatly appreciated.
Most of these parts would be 2nd op on a DV-59. I do have a grinding wheel attachment for a lathe but I have never seen it hooked up. I dont know if I can get it to mount on my DV-59 effectively.
Thanks in advance.