Re: [ATM] Polishing Machine Shaft size

[Richard <cnc@cncservo.co.uk>]

Hi William,

Thursday, October 25, 2007, 10:04:17 PM, you wrote:

WM> I need to buy a couple of pillow block bearings, and
WM> was wondering about shaft diameter.  I was thinking
WM> about going with 1.5" diameter, but the machine is
WM> being built to accomodte maybe up to 30+ "s

My grinding/polishing/figuring machine has a 27" table and I've used a
50mm diameter shaft at the top running in a 4 point bearing backed up by a
roller bearing. The shaft steps down to 40mm at the bottom and runs
there in an angular contact bearing which is opposed and pre-loaded to
(from memory) about a tenth of the static load rating of the lower
bearing.

-- 

Best regards,
  Richard in the UK

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