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dp
04-13-2008, 02:52 PM
This is a rather mundane issue but there are pictures! :)

The old Whipp shaper I bought is still in refurb but the long cold winter evenings are gone and progress is being made again. The lead screw that drives the table has several collars that act as thrust bushings and spacers. They're all held in place with tapered pins. One of them revealed a crack when I removed it and I suspect it shows I'm not the only one that doesn't have a reamer for tapered pins. I turned a replacement collar from brass as that was all I had available in that diameter, and since this particular collar has no stress on it brass should work well.

But I got to thinking - because it has no stress on it why not pin it with a split roll pin? I do like the old timey look of the tapered pins but is it worth buying a reamer for? The down side is I would have to drill the shaft to the large diameter of the taper and that could weakien it and a broken shaft would doom the machine to the scappers.

Anyone have any thoughts on tapered vs roll pins?

The original collar as it arrived in my driveway (very large)
http://thevirtualbarandgrill.com/machinery/whipp/DSC00816.jpg

The crack: http://thevirtualbarandgrill.com/machinery/cracked_collar.png (http://thevirtualbarandgrill.com/machinery/cracked_collar.png)

The brass replacement:
http://thevirtualbarandgrill.com/machinery/brass_collar.png (http://thevirtualbarandgrill.com/machinery/brass_collar.png)

doctor demo
04-13-2008, 03:13 PM
What size reamer do you need, and where are you located?
Steve

dp
04-13-2008, 03:36 PM
That would be a No. 5 reamer and I'm in the Seattle area. I'd used a 1-2-3 block to measure the taper and it's .20/inch which is a standard taper (1/4" per foot).