Diy Brushless Spindle

[blackburn mark]

Just bought 2 off 2" dia x 50mm bits of Ali.....one to mess about with and the other to do the propper job :whistling:

hahahahahaha!!!!!! i think me n you might have been separated at birth :rofl:

[njhussey]

Well they say you're supposed to measure twice, cut once........never works for me :confused: so I get twice what I need and mess the first one up :naughty:

[njhussey]

Cheers John, when you know what they're called they're everywhere!! Still got to work out how to shield them.......

[Jonathan]

In the smaller sizes they are known as magneto bearings, Arc keeps them, ask for E8's

Hmm, I even looked there... must be blind:

http://www.arceurotrade.co.uk/Catalo...-Ball-Bearings

Still got to work out how to shield them.......

Aluminium disk or whatever with only a very very small clearence - enough to stop it touching, but not so big that it lets lots of dust in. I believe the term is aluminium labyrinth. Any seal which touches is going to generate a lot of heat due to friction.

[njhussey]

Hmm, I even looked there... must be blind:

http://www.arceurotrade.co.uk/Catalo...-Ball-Bearings

Or...

http://simplybearings.co.uk/shop/p42...duct_info.html

or...

http://www.ebay.co.uk/itm/E8-MAGNETO...item2eaeaac383

etc.....etc...

Aluminium disk or whatever with only a very very small clearence - enough to stop it touching, but not so big that it lets lots of dust in. I believe the term is aluminium labyrinth. Any seal which touches is going to generate a lot of heat due to friction.

Was going to see if I could reverse engineer a shield like on the 608RS bearings....or how about http://simplybearings.co.uk/shop/p24...duct_info.html but not sure what speed it's rated to....food for thought anyway!

[Jonathan]

Or...

http://simplybearings.co.uk/shop/p42...duct_info.html

or...

http://www.ebay.co.uk/itm/E8-MAGNETO...item2eaeaac383

Yes, easy once you know...

http://simplybearings.co.uk/shop/p24...duct_info.html but not sure what speed it's rated to....food for thought anyway!

I doubt rubber seals are appropriate for the speed this will be running at. The bearings apparently already get hot, so a seal like that is just going to make it worse. I used some on my wind turbine, for each blade, and they add a lot of friction...but it didn't matter there as it's only a few rpm.

[njhussey]

I doubt rubber seals are appropriate for the speed this will be running at. The bearings apparently already get hot, so a seal like that is just going to make it worse. I used some on my wind turbine, for each blade, and they add a lot of friction...but it didn't matter there as it's only a few rpm.

Just found out they are only good for 1000 rpm....damn!!! Just had a brainwave tho! Will contact our pump suppliers and see what they use...if they run them a 2 pole then that's 2900 rpm so might be better...will put some feelers out.

[njhussey]

Just been trying (and I stress trying!!!) to do some machining of my lead screws in my lunch break...think I'll get someone else to do it! The jaws are worn and it takes ages to get them to clamp so it spins true and I had to shim the cutting tool so it was somewhere near the correct height...results of 3/4 hr below lol

[blackburn mark]

Just been trying (and I stress trying!!!) to do some machining

owch!
you need to hassle your gaffer to let you do a nip n tuck on that lath

it might cut alli a bit better than that (fingers crossed)

what outside diameter are you going for on your bearing housing ?
i went for 43mm so that if it all didnt work out with my brushless spindles i could just drop a kress into the 43mm clamp..... its worth doing some research because if i was starting again i think would go slightly larger than 43mm to avoid an issue whereby the brushless motor mounting screws (on the larger motor) clash with the 43mm di making it a bitch to simply drill all the way through or cut a flange to mount the housing to the motor (i think the 10mm shafted motor mounting screws are 22mm from the centre)

its worth thinking about because if i had gone 50mm as a standard for all my spindles life might have been a little more simple


i ended up turning the 50mm one down to 43mm to match the other two

[njhussey]

owch!
you need to hassle your gaffer to let you do a nip n tuck on that lath

it might cut alli a bit better than that (fingers crossed)

hmmm I'll try one (need to buy a boring bar as don't have one) and see what happens. From the finish I got you'd have thought I'd stuck it in a drill and used a file!!

what outside diameter are you going for on your bearing housing ?
i went for 43mm so that if it all didnt work out with my brushless spindles i could just drop a kress into the 43mm clamp..... its worth doing some research because if i was starting again i think would go slightly larger than 43mm to avoid an issue whereby the brushless motor mounting screws (on the larger motor) clash with the 43mm di making it a bitch to simply drill all the way through or cut a flange to mount the housing to the motor (i think the 10mm shafted motor mounting screws are 22mm from the centre)

its worth thinking about because if i had gone 50mm as a standard for all my spindles life might have been a little more simple


i ended up turning the 50mm one down to 43mm to match the other two

Weeeeell....as it happens I've bought 50mm rounds so was going to stick to that...got to see if they've got the external jaws first else I'll get one of our local friendly machinists to make it...