This one looked easy at first. A friend has a very old 20 ton hydraulic shop press. The unit has no manufacturing identification tags, or markings. It looks 1920's vintage. The hydraulic ram is supported in the guides by two shaft bushings. Although they take no heavy loads, the old rubber bushings were worn and cracked and a replacement was called for. The bushing cores were made of a kind of billet material that looked very corroded and cracked. After looking around for most of the year my friend concluded that replacement parts were no longer available and that he should replace the old press with a new unit. He offered the press to me -- just to get it out of his shop. While looking around for a newer model, I suggested that we should at least try to make a new aluminum core along with a new nylon bushing. We took some measurements and came up with the following sketch.

It looked simple enough until we realized that the bushing core had a very slight taper and that was going to be a bit of a problem. All the other dimensions were easily determined from the original part. We may be able to save this press yet !!!

We started with a piece of aluminum  stock and faced the front. The spindle speed was set at 600  rpm and we used some cheap 3/8" HF brazed carbide tool bits. I hand fed the bit at .02". The result was satisfactory. By using a little Marvel Mystery

Oil and a faster feed  rate the next cut turned out like a mirror. Since the HF44142 doesn't have any way covers, I used some rags to serve as a substitute and it worked very well.