I replaced my motor with a new 3/4 hp 110v motor from Grizzly. ?Seems to run fine. ?220 would be better from a harmonics point of view - but 110 is more versatile from a small hobby shop point of view.
With the Dalton spindle bearings, I believe the recommended setting is no more than .002¡± vertical movement on the spindle- measured with a Dial indicator, by properly shimming the bearing stock, tightening the bearing cap bolts, and inserting a bar into the headstock and pulling upwards.
The bearings need 2 thou or less to hold the lube oil. ?Anymore runout will cause the work to deflect when taking a cut. Less, causes excessive wear on the bearing material and or machined shaft surface.
Glenn B.
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On Jul 22, 2020, at 4:18 PM, Dennis Turk <
dennis.turk2@...> wrote:
Hi Larry
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Using the Dalton supplied countershaft three step pulley Dalton ran there countershaft at 250 rpm.? This I believe gave a top spindle speed of 480 Rpm.? You would be safe at running your counter shaft at 350 rpm. This would give you a spindle speed of around 700 or a little more.? With drip feed oilers for the spindle bearings you can run up to 900 rpm safely.? Would not recommend running your Dalton spindle any faster than that.
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Dennis
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Sent from for Windows 10
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I'm ready to mount the motor on my Lot 4 (2050).
the former owner ran the jack shaft at 575 rpm tho, to be fair, judging by the lack of chips evident when I bought it, not for any length of time.
Question is what is the max rpm for the jack shaft using roller bearings and the max / min Hp required?? My lowest rpm in my setup is 287.
Also, is there a recommended clearance for the main spindle bearings?
Thanks for your help
Larry
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glenn brooks