Can I take deeper cut with more HP? - Router Forums
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post #1 of 32 (permalink) Old 02-07-2016, 09:45 AM Thread Starter
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Default Can I take deeper cut with more HP?

Iím in the market to buy a dedicated Router for my router table and I canít decide if I want to pay twice the amount for only 1 HP.

The thing is that I have never bogged down my 2 HP routers no matter what I have done. The only thing that happens is that I burn up bits. I might be persuaded to spend the extra money if I can make every cut in one pass, if thatís possible.
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post #2 of 32 (permalink) Old 02-07-2016, 10:18 AM
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Originally Posted by JohnnyB60 View Post
Iím in the market to buy a dedicated Router for my router table and I canít decide if I want to pay twice the amount for only 1 HP.

The thing is that I have never bogged down my 2 HP routers no matter what I have done. The only thing that happens is that I burn up bits. I might be persuaded to spend the extra money if I can make every cut in one pass, if thatís possible.
Cutting in multiple passes is a myth. The best way to preserve blade life and reduce friction is to cut in one pass. Heat is removed by the wood chips. Fewer chips, less heat removal.

Try it. You will thank me later.


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post #3 of 32 (permalink) Old 02-07-2016, 10:51 AM Thread Starter
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Cutting in multiple passes is a myth. The best way to preserve blade life and reduce friction is to cut in one pass. Heat is removed by the wood chips. Fewer chips, less heat removal.

Try it. You will thank me later.
Oh thanks, you are the first one to say this. I've been told for at least 20 or so years that I have to make multiple passes. I've used my table saw to make dadoes because it was easier to push a chisel then to keep razing the router bit.
I'll give it a try
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post #4 of 32 (permalink) Old 02-07-2016, 11:14 AM
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Oh thanks, you are the first one to say this. I've been told for at least 20 or so years that I have to make multiple passes. I've used my table saw to make dadoes because it was easier to push a chisel then to keep razing the router bit.
I'll give it a try
I should add one clarification, never cut deeper than the bit width. The advice I am giving comes straight from the Bosch engineers at the factory.
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post #5 of 32 (permalink) Old 02-07-2016, 12:14 PM
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Originally Posted by timbertailor View Post
Cutting in multiple passes is a myth. The best way to preserve blade life and reduce friction is to cut in one pass. Heat is removed by the wood chips. Fewer chips, less heat removal.

Try it. You will thank me later.
and to validate what you say...

Router Forums - View Single Post - Rethinking router folklore....
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post #6 of 32 (permalink) Old 02-07-2016, 12:18 PM
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Chip ejection is key. Some woods clog bits more than others.

Wider diameter bits need more HP or lighter cuts.
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post #7 of 32 (permalink) Old 02-07-2016, 12:56 PM
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"Oh thanks, you are the first one to say "
************************************
You may pull back a stub too.
For example, a single path cut with a straight bit at depth, will
cut a pathway wider than the cutter. You want that?
Moreover, breakage is common whence the cutter is engaged in too much work.
In the class room, if I hear the scream of a cutter deep in the work, the next thing I see is blue smoke.
As obnoxious and slow as it may be, the best of cuts are taken in steps.
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post #8 of 32 (permalink) Old 02-07-2016, 01:10 PM
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I tend to agree with Pat. If you are too deep the chips have a hard time being ejected and the result is lots of heat. Straight bits in particular don't eject them well. I've found that a saw cut almost to depth first makes a huge difference in routing effort, heat, and bit life. The chips eject easier and the bit gets air for cooling.
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post #9 of 32 (permalink) Old 02-07-2016, 01:36 PM
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Good advice on multiple cuts. At the price of bits, I'd prefer to make shallow cuts, and I have a 3hp router. I just don't think powering through hard woods in particular, is a good idea.
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post #10 of 32 (permalink) Old 02-07-2016, 01:58 PM Thread Starter
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I probably wouldn't mind making multiple cuts if I had a router lift. As it stands now it's not only a pain to raise the router for each cut, but also a safety hazard. I almost got hurt last week trying to raise the router when I accidentally turned on the switch. A few years ago my PC router fell out of it's base while I was cutting. I don't know if I forgot to lock it or if the leaver came loose. I've placed wood blocks under the router ever since just in case it happens again.

OK well I am going to purchase a router lift sometime soon and I'll have to play around with the height of cut until I find what works for me.

Last edited by JohnnyB60; 02-07-2016 at 02:20 PM.
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