Posted by Leroy on July 24, 2013 at 19:26:13 from (74.126.42.240):
Been so long loosing all my math so need help. On a drill press to use a 1725 RPM motor driving a 12" diameter pully connected to a 22 tooth sprocket on same shaft driving a 45 tooth sprocket into a 30 tooth sprocket that turns the shaft the chuck is mounted on what size motor pully do I need to get the bit speed down to a hundred RPM or 150 RPM. Only plan on using this press for 5/8" up to 1" bits so I need a slow speed. My supposedly good drill press from TSC 15+ years ago on the slowest speed is faster than I would like (think around 600 rpn) for 1/2" bits and I run it on that slowest speed all the time for all bits, think they call it a 16 speed and it is only fast, extra fast and out of this world fast. This one that I want to get going is one that you could either put a motor on or use a hand crank.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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