Trouble with Tear-out...Help! - Router Forums
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post #1 of 11 (permalink) Old 12-28-2009, 10:42 PM Thread Starter
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Default Trouble with Tear-out...Help!

I'm new to table mounted routing and am currently having trouble by getting a great deal of tear-out while trying to remove 1/8" of pine material along half of the length of a 3/8" thick piece of stock. I am using a new bit and have just pushed the stock down the fence to a clamped stop. I've tried to go slower, tried slower router speeds...

I am trying to leave a rounded inside shoulder on each side of this board.

I know this is very elementary as I have watched what you all can do.

Thanks for any help.

Rex
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post #2 of 11 (permalink) Old 12-28-2009, 10:49 PM
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Hey Rex,
Welcome to the forum.
Are you routing end grain ?
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post #3 of 11 (permalink) Old 12-28-2009, 11:18 PM
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Try doing it in two passes. Is it construction grade or select? Select has a tighter grain.

A person can never have too many tools!
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post #4 of 11 (permalink) Old 12-28-2009, 11:50 PM Thread Starter
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No end grain, Duane, this is just running down the stock.

Thanks,

Rex
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post #5 of 11 (permalink) Old 12-28-2009, 11:56 PM Thread Starter
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Thanks, Ron, I will try that. This is construction grade pine and I was doing a lot of these but I will run them twice with this radius and if doesn't work maybe use a shorter radius.

Rex
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post #6 of 11 (permalink) Old 12-31-2009, 10:16 AM
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try a different RMP ..
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post #7 of 11 (permalink) Old 12-31-2009, 11:04 AM
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What is a "RMP"? typo? RPM ?

From S.W. Missouri
Near but not too near Springfield
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post #8 of 11 (permalink) Old 12-31-2009, 05:55 PM
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Hi Rex - I think you may be presenting the wood in the wrong direction. If the router is under the table and the cutter sticking up, you should be pushing the wood, against the fence, from the right and with a new cutter it will cut cleanly. I hope I am not telling you how to suck eggs. Regards Ian UK
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post #9 of 11 (permalink) Old 12-31-2009, 09:30 PM Thread Starter
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I have presenting in the correct direction. I have been using two passes to reduce the tear out and that helped a little. I just got through feeding some more pieces through and this time I added a sub-fence to the face of the table fence and used a much smaller opening, just a little larger than the bit, and this worked great!

So why the big difference??? I'm going to run some more tomorrow with different wood but for now the results seem quite different and I don't understand why.
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post #10 of 11 (permalink) Old 12-31-2009, 11:21 PM
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The difference is more support where the cutter is coming out of the piece you are
routing = less tearout. Sometimes painters tape ( masking tape ) helps also.

A person can never have too many tools!
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