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Re: Max & recommended shaft rpm


 

My rig gives me 287 rpm.? I'll have to find a smaller drive pulley.? I'm running an atlas jack shaft.? Haven't figured out how to mount the dalton shaft yet.
Thanks for the info.
L

On Wednesday, July 22, 2020, 7:18:17 PM EDT, 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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From: L Leonard via groups.io
Sent: Wednesday, July 22, 2020 4:02 PM
To: [email protected]
Subject: [DaltonLathes] Max & recommended shaft rpm

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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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