Рет қаралды 271,573
Quick video of unwrapping and nut dis-assembly of two RM1605 (16mm diameter, 5mm pitch) and one RM2005 (20mm diameter, 5mm pitch) ball screws with ball nuts for a G0704 CNC conversion.
Shipping took 10 days from me sending the payment and arrived via FedEx. Packaging seems adequate as I had no damage and the screws are straight. I had them cut to size and ends machined per drawings I sent Chai and they machined them accurately - the threads are good and the ends fit into my bearings smoothly and without play.
I had the top of one nut ground for clearance and that was done well - I had seen a photo on cnczone where it looked like they used a handheld grinder so its good to see that's done more professionally now.
All of the nuts show signs of grit - clearly visible in the video on the wipers and the ball screw returns. One of the nuts had a slight rattle, which turned out to be from it missing 1 ball (should be 17 in each of the three tracks on the 16mm and 20 on the 20mm screws). I sent an email and am being sent extra free of charge.
Update - Received enough balls to repack all 3 screws. I have installed them in my G0704 mill now and they work excellently.
eBay store from where I bought them -
www.ebay.com/us...