Gallery, Projects and General > The Design Shop
lathe milling spindle?
mattinker:
My idea was to pre-load by compressing the outer races using a bolt on cap and a spacer with spring washers in the inside. This puts no additional pressure on the motor bearings. My problem is how much pre-load and what sort of spring washers would be usable.
Regards, Matthew
philf:
--- Quote from: mattinker on March 21, 2015, 05:59:43 PM ---My idea was to pre-load by compressing the outer races using a bolt on cap and a spacer with spring washers in the inside. This puts no additional pressure on the motor bearings. My problem is how much pre-load and what sort of spring washers would be usable.
Regards, Matthew
--- End quote ---
Matthew,
Have a look at:
http://www.emmottsprings.co.uk/products/waved-washer-springs/
They're designed specifically for bearing preloading. In my milling spindle I used one between two deep groove ball bearings at the pulley end and precision double row angular contact at the business end.
Cheers.
Phil.
vtsteam:
Bertie, which brushless motor did you get and what's the kV? I've got a couple large motors (EMP N5055 in 400kV and 580kV) I've been saving for motorized spindles, a 3/8 C8 ER11 spindle and a couple of power supplies, so I'll be very interested to see how yours works out.
One concern I've had is the relatively high RPM for power if cutting steel (and necessary very small mills). But I really haven't worked out what the requirements for these motors are yet. Aluminum, no problem, but I do wonder about steel.
Were you planning on running at 12 volts?
mattinker:
--- Quote from: philf on March 21, 2015, 06:43:53 PM ---
Matthew,
Have a look at:
http://www.emmottsprings.co.uk/products/waved-washer-springs/
--- End quote ---
Thanks Phil,
that looks like exactly what I need!
Regards, Matthew
bertie_bassett:
I managed to get hold of a xyh 6364 from giant shark, shows as out of stock but if you search for c 6364 or n6364 you can find the same .motor in stock?? Mines the 250kv one as its the lowest kv around. Should give a max speed of 3k rpm at 12v. Though I can rewind ut for a lower kv If required.
The vid I posted shows it running on 12v at max and minimum speed. If I go too low it starts stalling.
Iv not actually looked up speeds but It should be useable in steel with care and patience.
The 12v test was only really to see if it spins. I might mid the power supply for 24v but will probably just see how it goes.
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