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Reply by splintergroup

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Posted on Need to cut multiple bevels

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splintergroup

2929 posts in 1734 days


#1 posted 08-21-2019 05:15 PM


Miter bit angles for the router are extremely accurate. It s not nominal.

- Rich

Yes, extreme accuracy. The problem comes in holding the workpiece and how square the router table is to the bit axis.

Remember that depending on how you cut the facets can affect accumulated error. Assume you place a flat surface on the router table and the bit cuts some angle, then rotate the piece so that fresh cut angle is now riding on the table and the bit is cutting the next angle.

Any error in the angle between the table and bit is multiplied by the number of cuts. Say you use a 30 degree bit to cut 12 facets. a 0.1 degree error on your table/bit would leave over a 1 degree total error. You would be able to see the wider (or narrower) facet due to this error easily on the diameter piece you describe.


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