Friday, June 17, 2011 BOSCH 84624M 1/2-Inch Shank Tongue & Groove Router Bit 3-Wing With Bearing Review

Average Reviews:

(More customer reviews)Convenience at a Cost

I purchased one of these bits hoping it would be a quick and accurate way to cut tongue and groove joints for mating ?" plywood to ?" solid lumber.After several adjustments and setup runs I was not able to achieve tight, accurate seams.The shims included do not offer enough range of adjustment to make snug joints.When looking at an assembled joint from the end a gap is present (the tongue is too narrow for the groove).This gap is especially noticeable if you try to rout any profile (such as a roundover or door lip edge) on the finished end.

When using both cutters to create the tongue, the bit assembly is exactly ? inch wide.This means that if your stock is even a few thousands of an inch oversize you will leave a very thin strip of wood.It will usually break off but leaves behind a small raised edge that will have to be sanded or scraped off.

After scrapping one dining table top, I am returning this bit and reverting back to my old method of setting up a dado head with featherboards.It is more time consuming but the only accurate way I have found to create tight tongue and groove joints.

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Product Description:
Micrograin bits designed to cut tongue and grooves on 1/2" through 3/4" thick material. To cut the tongue, use the complete assembly; to cut the groove, remove one slotting cutter. 1/2" decorative cut depth. Recommended for use with a router table.