MadModder
Gallery, Projects and General => How do I?? => Topic started by: Aestus57 on June 16, 2012, 10:04:07 AM
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Hi there,
I have "acquired" a Cast Iron Cylinder casting which I'm using to make a horizontal Mill engine, its 3/4" bore X 1 3/8" stroke.
I've bored it out and have now come to the stage of cutting out the steam ports for the slide valve.
Whats the best way of doing this?
Do I drill a series of holes then link them up with a slot cutter, or go staight in with the slot cutter without drilling... or drill a hole at each end and mill out in between?
I have seen situations where people have made a gang milling cutter, but don't think thats for me with my level of exprience just yet.
The ports are 3/32 wide inlet and 3/16 wide exhaust X 3/8 long.
Thanks in advance!
Regards
Peter
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just leave them as a series of holes you will break the milling cutter trying to make a slot of that size
start with a small drill to check the alinement
It will make very little difference
Stuart