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-   -   Newbie question-- 3/8 cove bit use. (https://www.routerforums.com/table-mounted-routing/106817-newbie-question-3-8-cove-bit-use.html)

MT Stringer 01-17-2017 04:58 PM

Some times, I don't use a fence at all. The bearing does the work. That works if the workpiece is laying flat on the table.

Shop guy 01-17-2017 05:57 PM

Best thing you can do with that bit is throw it away. Now before you try to give it one more chance.

TenGees 01-18-2017 12:05 AM

It looks like something is moving. Is there a lock on the router's height adjustment that's not locked? Is the wood staying tight to the table and fence while making a pass? When you tighten the bit into the chuck, it should not be right to the bottom. Leave a 1/16 to an 1/8 or so from the bottom because many collets won't tighten properly if the bit is bottomed out (dangerous).

I agree with the others who say that is a poor bit but I think you should be getting better results even with that bit, unless it's very dull or gummed up.

curly5759 01-21-2017 12:45 PM

Thanks everyone for the replies. I tried the crappy bit a few more times and trashed it. It seemed to be scraping the wood away instead of a clean cut.( Lots of small divots in the cut area) I was able to get a better cut with the other bit. Now, time for more practice cuts.


Tim

Herb Stoops 01-21-2017 02:19 PM

Quote:

Originally Posted by curly5759 (Post 1438162)
Thanks everyone for the replies. I tried the crappy bit a few more times and trashed it. It seemed to be scraping the wood away instead of a clean cut.( Lots of small divots in the cut area) I was able to get a better cut with the other bit. Now, time for more practice cuts.


Tim

Tim, the HSS bits dull easily and like to leave burn marks. Also the solid pilot will burn easily and even cause small divots that makes a lumpy cut.
I have some carbides with small brass pilots that I use for tight spots where the ball bearing pilot is too large to get in and out of, but for the most part don't use them for general routing.
Herb


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