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Yes, the larger the drill, the lower the RPM's should be. Furthermore, the larger the drill, and harder the material is, the more secure your fixture must be. For example, drilling a 1/4 hole in wood, you can hold the wood and use a drill. Drilling a 3/4 hole in stainless steel, you need a vise and clamps, and a port-o-matic or bridgeport mill.

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17y ago

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