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acrylic undermount sinks
Last Post 04 Nov 2008 05:32 PM by Kelsey Crisp. 10 Replies.
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Peter Carpenter
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26 Oct 2008 02:37 PM  
Hi everyone just wondering if any of you guy's that router out the sinks for acrylic undermounts have come up with a solution to the dreaded nylon bearing failure when routing the sink cut out. We get brand new bearings that melt on the first sink there must be a better way.
Peter theinstaller@internode.on.net
Mike Gladstone
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26 Oct 2008 03:31 PM  
Peter, Betterley has a sink saver attachment for that attaches to your router base. I've never had a nylon bearing fail by melting, but it has separated when the cutout hit it because it wasn't supported correctly
Mike G
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Johnny C
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26 Oct 2008 04:22 PM  

I use a template and pre cut all my sink holes before mounting the sink.  This way there is much less material to remove when profiling the top of the cutout after the sink in attached.  I would imagine that those who use CNC will always precut the sink holes.

If you are using your profiling bit to cut out the sink, I would guess that you could extend the life of your profiling bit by a factor of 3X by using a precut sink hole.

If you are using a straight bit with a nylon bearing to make a preliminary cutout, you will always run the risk of the bearing disintegrating unexpectedly.  I have words in my vocabulary to cover those instances, but I have never had the words give me back the time it took to fix the damage from a ruined bearing.  Also if you make the cutout after gluing the sink on you need to use another router set up to plunge a hole throught the deck.  I just found it much easier to use a template with a template guide and a 3/8" single flute bit and make all my cutouts before gluing.

Johnny C

Peter Carpenter
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27 Oct 2008 02:30 PM  
Thanks Mike I have seen that in one of their catalogs I will look at that again.

Thanks Johnny C I guess if you can see the actual sink while you are routing it you can stop when the bearing disintegrates and maybe save some time in repairs.

I wonder why someone doesn't make a brass bearing or something a bit more substantial than nylon.
Peter theinstaller@internode.on.net
Jon Olson
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27 Oct 2008 03:06 PM  
Peter do you try to take off all the material with one pass? This might be contributing to the bearing heating up.
 
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Kelsey Crisp
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27 Oct 2008 09:08 PM  
Posted By Johnny C on 26 Oct 2008 04:22 PM

   I have words in my vocabulary to cover those instances, but I have never had the words give me back the time it took to fix the damage from a ruined bearing. 


I use the straight bit with the soft bearing (not wanting to mention the brand) to cut out the sink and leaves about 1/8" to remove with the sink bit. I use these bits over and over and never have I had a bearing fail. One day I decided to break out the new bit... put it in collet and away I went. After I routered about 2 inches... something didn't feel right so I stopped. The f^%$ing bearing was GONE... and I too used those words. It cut into the sink a little.  The set screw just came out. the bearing fell off. In 27 years of using hundreds of bits, I never prechecked if the set screw was tight.  Thinking I had just ruined a sink I called Andy....  just to hear the laughter in his voice while he said... yeah, really sucks doesn't it"?  Luckily I was using one of the thick LG sinks and I was able to sand down the sink enough.
Those words do make you feel better though.....
Yep.... I said the Dow will go to 6000
Johnny C
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28 Oct 2008 11:16 AM  
Kelsey, the disapearing bearing trick has bitten me also.  As long as we continue the journey, we never quit learning.

Johnny C
Peter Carpenter
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28 Oct 2008 02:10 PM  
Jon, I was doing as you said I think I will do as Kelsey said and remove the bulk first at least then I can watch the poorly designed bearing disintegrate and hopefully stop before to much damage is done. I have allot of templates already so I don't think I will do as Johnny was saying about cutting the bowl out first.
Peter theinstaller@internode.on.net
Andy
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03 Nov 2008 11:44 PM  
We use a template to cut the sink hole first and cut it about 1/8" smaller than the sink. I like the idea of the teflon bearing but have not had a lot of success with it.

Bill at Wesley Tools was telling me about a new bearing that I had not heard about.  You may want to go to www.wesleytools.com to check out their sink bits.

Someone mentioned the bit will last longer if you precut the sink cutout.  We use one sink bit for everything and it last for a very long time.  Keep in mind we are only removing about 1/8" each time.
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Johnny C
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04 Nov 2008 03:10 PM  
Posted By Andy on 03 Nov 2008 11:44 PM
We use a template to cut the sink hole first and cut it about 1/8" smaller than the sink. I like the idea of the teflon bearing but have not had a lot of success with it.

Bill at Wesley Tools was telling me about a new bearing that I had not heard about.  You may want to go to www.wesleytools.com to check out their sink bits.

Someone mentioned the bit will last longer if you precut the sink cutout.  We use one sink bit for everything and it last for a very long time.  Keep in mind we are only removing about 1/8" each time.

Yeah, Andy, thats exactly what I am talking about.
Johnny C
Kelsey Crisp
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04 Nov 2008 05:32 PM  
Johnny.....  I forgot to mention,  now with every new bit, the set screw gets red loc-tite on it. It took me 27 years of using router bits for this to happen, but by damn it will not be a problem in the future.... but if it ever does,,, I have a bottle of Crown Royal sitting next to the router bit box..
Yep.... I said the Dow will go to 6000
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