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Preventing plunge router circle marks

1K views 4 replies 5 participants last post by  Slemi 
#1 · (Edited by Moderator)
I'm using a straight router bit and a template to hollow out a wood block. However, always on the last plunge down it makes a circle cut mark. Is there a technique to avoid this from happening? I'm using a Dewalt 618 router, if that matters.

Thanks!

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#5 ·
I would say that your router base is not fixed enough and You move it a little to deep when You press it down to make final pass. Have two 1/8" shims, made of wood of course, at hand when You hollow pieces and then just before You plunge to final dimension put shims between router base and the working piece and plounge router to final dimension and when You have the final dimension set, take out shims and do your final pass.
 
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