On Wed, 15 Feb 2012 16:29:36 -0500, you wrote: >The plastic, except for temporary fitting wouldn't do for permanent as it >will be trapped between the spindle preload nut, and it's locking nut in >normal operation. That is driven tight with a drift punch in the nut >slots. The plastic will 'cold flow', loosening the nut, and that won't be >good for things.
The Al flanged bush I have fitted could be made of steel and would permit a preload nut. It's 5mm thick turned with a flange. The spindle is 40mm dia, the bush is 50mm + a 10mm flange (70mm total OD). The flange is drilled and tapped with 5 holes on a 55mm PCD. The encoder disk is bored 50mm and fixed to the flange with countersunk 3mm screws. In my case the preload nuts are inside the headstock casting so it didn't need to be anything special, just had to hold the encoder wheel true and in a fixed position relative the spindle. The lathe has an encoder fitted as standard driven by a timing belt 1:1, but the encoder is noisy. I had all the materials handy so it was simple and cheap to make one as a temporary fix. Never got around to finding a suitable replacement at the right price and to be honest, I stopped looking as it works so well. Steve Blackmore -- ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
