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Strawberry Orange Banana Lime Leaf Slate Sky Blueberry Grape Watermelon Chocolate Marble
Strawberry Orange Banana Lime Leaf Slate Sky Blueberry Grape Watermelon Chocolate Marble

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Ron Altier -
hawkeye10 -
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What is the difference from a mortise router bit and a spiral up cut for box joints?


Can they both be used to make a box joint?

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Spiral up bits are usually used on router table operations.

Here's an article comparing the various straight cutting bits-

http://www.woodcraft.com/Articles/Articles.aspx?ArticleId=445

Spiral bits cut a little cleaner and are better for plunge operations. I've cut box joints with both. 

 

 

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And really depending on where you are going to use this. If you are going to use it in a table router you would probably want a down spiral for the box joints. That way it is pulling the shavings down into the table for the dust collector to take away. If you are using it in a hand held router, then the up spiral will lift the shavings and if you have dust collection it makes it easier to get rid of the shavings and dust.

A straight bit will also work for the box joints. The dove tail jig I have will also do box joints and you just use the straight bit.

 

 

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Old topic, still a great question.

Moved up from the archives

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I have the Incra BJ jig and I set it up on my router table and got a lot of tearout on the outside of the board. I now use it on the table saw with no tearout.

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