Switch for old belt sander

I have an older (circa 1960 I'd guess) belt sander than has an outboard DC motor (110V, 1hp if memory serves). The wires were cut and I need to rewire it and am wondering if I should install a variable switch at the same time. Can I use one of these?
http://www.tools-for-woodworking.com/product.asp?3 08&submit.x%&submit.y=9
...or should I just get one of these: http://www.rockler.com/ecom7/showdetl.cfm?offerings_id 402&objectgroup_id#7&catid=7
If you don't have enough info, let me know and I'll check it out. I don't think it would pull more than 15 amps.
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