It is currently 28 Mar 2024, 18:59
sunnybob wrote:Having absolutely no experience with spindle moulders, but a fair passing acquaintanceship with motor driven machinery, are all the moving parts made well enough to withstand a 50% increase in torque?
Gearboxes especially dont take kindly to being over stressed.
9fingers wrote:Ok in terms of fitting, the original motor will likely be a 90 frame with 24mm shaft and the 3kw will almost certainly a 100 frame 28mm shaft so even if the there is room you will need a longer belt and new or bored out pulley. Boring out the pulley is easy enough but cutting a new keyway is a PITA unless you have the machine facility. Best way out is to fit a new pulley with taperlock system.
Make sure the motor is a capacitor start and run type, you will need the extra torque to turn the pulley step ratio to the spindle. Will need a 32amp supply/mcb too. Depending on the age of the DOL starter, you might not be able to get the correct overload relay to protect the new motor so factor in a new DOL.
9fingers wrote:TEC motors are generally OK or a Marelli which is a bit better quality for not too much more money. Second hand single phase can be a bit of a risk. If the centrifugal switch is knackered then its hard/impossible to get spares.
Mike Jordan wrote:I would suggest that you give the 2.2 motor a try first, even with stacked blocks and a substantial cut there should be no problem with power.
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