I'm making a replacement motor pulley. At this point I've got the steps cut in, and a starter hole for the 5/8" bore I'm going for. But in the back of my head I've got this nagging doubt about whether the whole thing will end up concentric or not. Initially, I had a fairly large block of 4" aluminum, and I put it between centers and cut the smaller step in, and faced off both ends. Then I put the small end in my 4 jaw chuck and indicated it to less than .001" runout, and parted it. After that I drilled a 1/2" hole and will use a small boring bar to get to my 5/8" ID.
Seems logical in steps to me, but I'm still wondering if it might have been better to bore the hole for the shaft, then put the whole thing on the shaft between centers. It'll be my first pulley, and I want to make more eventually. Since I was unsure of myself, I felt I'd ask before making the final bore in the pulley.
Terry
Seems logical in steps to me, but I'm still wondering if it might have been better to bore the hole for the shaft, then put the whole thing on the shaft between centers. It'll be my first pulley, and I want to make more eventually. Since I was unsure of myself, I felt I'd ask before making the final bore in the pulley.
Terry