Try a holesaw. They are effective and relatively cheap.

Tom
"Chris Smolinski" wrote in message
...
I need to drill a 1 3/4 inch hole in ABS plastic. I presently have great
luck doing this with smaller holes, up to an inch or so, using a step
drill bit. I've searched around the web, and the largest dia step drill
bit I can find is 1 3/8 inch - does anyone know of one that goes up to 1
3/4 inch?

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Chris Smolinski
Black Cat Systems
http://www.blackcatsystems.com