welp, so far its been a interesting day, I check the ER 40 blocks, my new ER 40 ball bearing nuts, arrived from Rocky Mountain CNC, and my packages from CME and MSC arrived, with some misc bits and bobs.
I spent about an hour and a half, on the phone, working out VFD issues on a boiler job in Vermont, with one of the minions. The boiler is up and running, the customer is currently happy. I made arrangement to go to the job, to remove the VFD and retire the control system.
I checked the ER 40 block out with an indicator, after about 3 or 4 different check outs, the best I can say is, the error is obviously below .001”, down in the .0006” - .0007” range. After the ball bearing nuts arrived, I recheck a couple of the measurements, the error dropped down to the .0005 range. I’ll recheck after better collets arrive. The block holes are centered, the threads are excellent, there are no rough edges and the nut/thread interface, while smooth, is very tight (no wobble).
1 - the HHIP blocks
2 - the LMS ER 40 x R8 collet chuck, with the ball bearing nut