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New to the community and routing. I have a Mastercraft Router/Table... 54-7036-6. What shank size bits do I use? TIA
You need to use bits whose shanks match your collet size. You can get various adapter bushings to change that size to a limited degree. What router are you using and what collets come with it?

Art Schmitt
 

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There are two measuring systems, and each has two basic shank sizes. If you machine is metric, then shanks are either 6mm 8mm or 12mm. If Imperial, that's 1/2 and 1/4 inch. The collet only changes a few thousandths between loose and tight, so they are not interchangeable. The router instructions will give you the required shank size, but usually, bigger is better.
 

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Many of their routers had both 1/4" and 1/2" collets. Check if you have two collets. 1/2" shanks are preferred for larger bits but you'd need the 1/2" collet.
 
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