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This is actually not correct. The general rule of thumb is 1/3 the speed and 3 times the feed. Almost everybody feeds drills far too slowly, and practically everybody feeds reams ridiculously too slowly.Beejay5169 wrote:use it slowly and take tiny cuts.
I won't argue - as an electrician who occasionally has to shift half his workshop to get to his machine tools, all of my engineering reaming has been done with hand-powered, adjustable, parallel reamers, and the JapLish manual that came in the box said (translated) "Several small cuts will achieve a longer tool life and better material finish than one heavy cut. Clear frequently and use cutting oil, sparingly."sniper1rfa wrote:This is actually not correct. The general rule of thumb is 1/3 the speed and 3 times the feed. Almost everybody feeds drills far too slowly, and practically everybody feeds reams ridiculously too slowly.Beejay5169 wrote:use it slowly and take tiny cuts.
Thank you for the sensible advice! Though I'm hoping to not need to ream the ID of the bushings, just where they are fitted into the carb body (if I do end up doing it myself, that is).Beejay5169 wrote: Be careful reaming bronze bushes - some of them are porous (sintered granules) and retain a fair amount of oil in the pores. Ream them and you close off lots of the pores and with no lubrication, the wear rate becomes impressive. May not be a major problem on butterfly bushes, but for a bush with some mechanical load or moderate shaft speed, it'll mean a short life for the bush.
That's what glass and ceramics are for. If you're dealing with something mean enough to attack glass, you might want to reconsider your choice of feedstock.BruceBergman wrote: When you start reaming organic materials you have to start worrying about materials incompatibilities - Citrus is acidic and aluminum has lots of ways to go rotten... Stainless isn't immune.