- Joined
- Nov 24, 2014
- Messages
- 3,569
@wired
FYI: I bought a used DA200 collet extension chuck. It has a thrust washer (~5/8" OD x ~3/8" ID) inside the nut (supposed to be non-rotating on the collet when the nut is torqued). The washer is still stuck in there, even after probably 40-60 hours of ultrasonic agitation and literally months of soaking in Acetone, Kroil, Easy Off, DMSO, etc.
More to the point, when I started the effort, after probably 40 hours of different soaks I decided to try heat. I soaked it in a toaster oven, set to 200F, for an hour or two then quenched it in Acetone, and alternately in Kroil, and let it soak.
I have no scientific proof one way or the other, but it has occurred to me that the heat may have served to cure (rather than degrade) whatever God awful polymer has materialized between the faying surfaces.
The washer is still stuck in there and I was lucky enough to buy a lot of 5 replacement nuts at a very reasonable price, so the stuck one has little value now. Getting that washer removed, cleaned and returned to full serviceability became a challenge that I wanted to conquer. However, I'm returning to my home base before Christmas and I'm thinking about how to mechanically (possibly destructively) separate the washer from the nut.
I hope that's helpful food for thought. YMMV. I hope your chosen process turns out fully satisfactory in short order.
FYI: I bought a used DA200 collet extension chuck. It has a thrust washer (~5/8" OD x ~3/8" ID) inside the nut (supposed to be non-rotating on the collet when the nut is torqued). The washer is still stuck in there, even after probably 40-60 hours of ultrasonic agitation and literally months of soaking in Acetone, Kroil, Easy Off, DMSO, etc.
More to the point, when I started the effort, after probably 40 hours of different soaks I decided to try heat. I soaked it in a toaster oven, set to 200F, for an hour or two then quenched it in Acetone, and alternately in Kroil, and let it soak.
I have no scientific proof one way or the other, but it has occurred to me that the heat may have served to cure (rather than degrade) whatever God awful polymer has materialized between the faying surfaces.
The washer is still stuck in there and I was lucky enough to buy a lot of 5 replacement nuts at a very reasonable price, so the stuck one has little value now. Getting that washer removed, cleaned and returned to full serviceability became a challenge that I wanted to conquer. However, I'm returning to my home base before Christmas and I'm thinking about how to mechanically (possibly destructively) separate the washer from the nut.
I hope that's helpful food for thought. YMMV. I hope your chosen process turns out fully satisfactory in short order.