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Repairs to a Bandsaw

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awemawson:
David,

Sorry to see the bubble. When I was experimenting with lost wax I used to bake my investments for much longer than an hour.  First I used a steam wall paper stripper to melt as much wax out as possible, then I used a pottery kiln at maybe 150 C for an hour or so for any remnants to drip onto a baking tray, then I took the temperature up to over 300 C for several hours

Meldonmech:

    Andrew
                 Next time I have a plaster mould to dry out, I think I will leave it on one side until I am melting alumiuium, then pop it in the furnace whilst the furnace cools down. May have to warm it up in the oven first to avoid any shock.

                                                                           Cheers David

Meldonmech:
 
    The casting machined up quite nicely, and as I gradually worked through each operation, began realize that the casting would be usable. The band saw blade guides were originally held in square holes.  I milled square slots then covered them with a bent angle piece made from aluminium sheet and held onto the casting with screws. There is a 6mm ball race which takes the thrust of the blade, which cannot be seen on the pics. 
            The device was assembled and re fixed to the saw. Trial saw cuts were made on the saw, and the saw is cutting true again.

                                                   Cheers  David

awemawson:
 :thumbup: Glad it turned out ok in the end  :thumbup:

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