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| Lathe spindle speed |
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| MadNick:
Morning, I have a belt/pulley setup on my lathe. At the moment, based on the diameter of the pulley in use I have slow, fast and medium - I'd like better accuracy. How would I be able to work out the spindle speed on any of the pulleys please? Nick |
| Pete.:
Take the motor speed and multiply it by the pulley ratio. If you have picador type pulleys they are usually in inches so let's say for instance it had a 2" pulley on the motor 8" on the countershaft that's a 1:4 primary reduction then it had a 2-3-4 and 4-3-2 step-pulley set between the countershaft and spindle would give you 1:2, 1:1 and 2:1 ratios there. So, with a 4-pole 1450rpm motor, that would give you a 362rpm countershaft speed. Then you would have three spindle speeds from the step pulleys of 181, 362 and 724rpm Or buy a cheap tachometer and measure it directly. |
| Fergus OMore:
A Barker lathe had 14 speeds! |
| MadNick:
Thanks Pete. @Fergus O'Doodle Doo, a good answer but not the right one ;) Nick |
| Fergus OMore:
There are not a lot of Barker lathes around but that is what my records show. Regards N |
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