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yup...
 

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Doug
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A straight, two flute carbide bit has two cutting edges running parallel (or really close to parallel) to tlhe body of the bit.

Spiral bits are machined like a drill bit, with the flutes wrapped around the bit. They can be upspiral or downspiral, depending if they pull stock up to the collet or push it away from the collet

http://www.woodmagazine.com/woodworking-tips/techniques/routing/spiral-bit
 

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Mike
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John if the bit is listed as a down-cut bit it will try to lift the part off the table because it is designed to push chips away from the collet. If you do use a down-cut bit it would be best to use feather boards to hold the part down for safety.
 

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Discussion Starter · #9 ·

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Mike
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John that is a down shear bit but it is not a spiral bit. It will try to push the part up from the table, remember the router is upside down in the table. The more material you try to take at one time the more pressure will be generated. If you make lite passes and use good push blocks you should be okay, just don't try to over feed the bit or it might cause enough rise you might have problems.
 

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Discussion Starter · #13 ·
John that is a down shear bit but it is not a spiral bit. It will try to push the part up from the table, remember the router is upside down in the table. The more material you try to take at one time the more pressure will be generated. If you make lite passes and use good push blocks you should be okay, just don't try to over feed the bit or it might cause enough rise you might have problems.
I can trade it in with the store for a straight bit, do you thunk that would that be a safer option?

John
 

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Mike
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Straight bits are really the best bet for use in a router table, you don't have to worry about which way a shear or spiral bit will try to move the part and if you have the face of the part up or down. Also being new to router use it gives you less to worry about during you learning curve.
 
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