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post #1 of 10 (permalink) Old 03-18-2009, 06:01 PM Thread Starter
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Default Routing Cocobolo

Currently, I am using some 1/4" cocobolo for a small clock I am making and I am having a rough time with some serious tear out. It would be safer, but more time-comsuming, to cut the pieces on the bandsaw and then sand to the final shape, but I am looking at the possibility of using templates and the router to increase production. I am using the straight angle (90 degrees to the wood fibers) flush trim bit with the templates. Would the shear angle bit work better? Any thoughts/suggestions? Much appreciated.
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post #2 of 10 (permalink) Old 03-18-2009, 06:30 PM
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Hi Steve,

I've seen a tip not long ago about using the bit "with" the grain. This way, you're not "lifting" the fibers to create tear-out. You may have to flip the piece over a few times.

Hope this helps.

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post #3 of 10 (permalink) Old 03-18-2009, 06:58 PM
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Hi Steve

" Would the shear angle bit work better? " = yes, they cut the wood unlike the standard straight bit that chops the filbers off, think of like a drill bit..the angle cuts the wood cleaner, or to say it works like a chisel /hand plane on a skew angle the blade is over the fibers and keeping them in place when the blade cuts them off clean, and just like a plane a little bit at one time is best.



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Currently, I am using some 1/4" cocobolo for a small clock I am making and I am having a rough time with some serious tear out. It would be safer, but more time-comsuming, to cut the pieces on the bandsaw and then sand to the final shape, but I am looking at the possibility of using templates and the router to increase production. I am using the straight angle (90 degrees to the wood fibers) flush trim bit with the templates. Would the shear angle bit work better? Any thoughts/suggestions? Much appreciated.



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post #4 of 10 (permalink) Old 03-18-2009, 06:59 PM
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Yes, a bit with angled blades will improve your cut. You should also use a backer block to prevent tear out.

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post #5 of 10 (permalink) Old 03-18-2009, 08:55 PM
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I've also seen suggestions to slightly moisten difficult woods, but haven't tried that myself.

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post #6 of 10 (permalink) Old 03-19-2009, 06:54 AM
 
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Obviously I'm not the expert around here, but I have several spiral bits, upcut and downcut, in various sizes and I will say that they make some pretty nice clean cuts. And, as a couple of the guys point out, the logic of the angled cut rather than the straight shearing action would certainly indicate that would be the result. I use them whenever I can. Just in the last few days I've been using a 1/2" shank 1/2" solid carbide upcut and man it makes cuts with surfaces that are perfectly slick.
For what it's worth.
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post #7 of 10 (permalink) Old 03-19-2009, 08:44 PM Thread Starter
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Yep, I"ve used the spiral bits myself and I do like the cuts they make. I was trying to avoid buying one with the bearing...oh well, guess I'll have to bite the bullet. Thanks for the reply.
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post #8 of 10 (permalink) Old 03-19-2009, 09:23 PM
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Hi Steve

Here's link to one at a good price with free shipping

Spiral Flush Trim Router Bit
http://www.mlcswoodworking.com/shops...ushtrim_anchor

=======

Quote:
Originally Posted by SteveSawDust View Post
Yep, I"ve used the spiral bits myself and I do like the cuts they make. I was trying to avoid buying one with the bearing...oh well, guess I'll have to bite the bullet. Thanks for the reply.



"It's fine to disagree with other members as long as you respect their opinions"

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post #9 of 10 (permalink) Old 03-20-2009, 05:24 AM Thread Starter
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Thanks, Bob...free shipping is always a plus. (Or, a minus, depending on how you look at it)
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post #10 of 10 (permalink) Old 03-20-2009, 07:14 PM Thread Starter
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Default Shear cut bit

Just picked up one of the shear cut bits for the cocobolo. BIG difference in the results. Thanks for all of the suggestions/advice

A day without routing is a waste...
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