lock miter bit - Router Forums
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post #1 of 30 (permalink) Old 01-16-2019, 06:56 PM Thread Starter
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Default lock miter bit

I am looking to get into using lock miter joints and was wondering if anyone uses the MLCS lock mitre bits?
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post #2 of 30 (permalink) Old 01-16-2019, 07:39 PM
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I have onr and works fine. Buy set up block. If you are going to a huge amount of corners buy an American made bit.
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post #3 of 30 (permalink) Old 01-16-2019, 08:09 PM
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MCLS bits are good and are mostly asian made. MCLS also owns Eagle America and they are mostly US made. The difference is price and quality. If you are going to make a couple drawers then get the MCLS. If you are going to make hundreds then get the Eagle America or Infinity.

As stated by by Steve get the setup block. Setting up a perfect 45 degree lock miter is exhausting. The gauge makes set up fast with only a little tuning.

The trick to making drawers with the lock meter is you need a gig to hold the parts vertical and square to the fence and table. They make commercial jigs or you can make one your self . Whichever jig you choose use it. Trying to free hand a drawer side vertically through a router can make you grow old quick.

Check out this link https://www.infinitytools.com/blog/2...er-router-bit/ for setup instructions.

Warning 45 degree miter lock bits are fussy to set up perfectly.

Good Luck
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post #4 of 30 (permalink) Old 01-16-2019, 08:29 PM
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Sorry I pushed post too quick. Look at this site as well for setting up lock miter bits.

https://www.popularwoodworking.com/p...s/lock-miters/

The key is in the picture, if the joint is set up right it will look like this. The bit is adjusted just right and the fence is adjusted just right. To achieve this without the set up gauge to get you in the ball park will take a long time to trial and error your setup.
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post #5 of 30 (permalink) Old 01-16-2019, 10:05 PM
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Infinity also has a setup jig that is a tiny piece of aluminum. It has a mark to line up with a certain spot on the bit. Find a safe home for this tiny jig because it's really easy to lose. There are two jigs, depending on the size bit you're using.
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post #6 of 30 (permalink) Old 01-17-2019, 12:47 AM
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The setup blocks work only if your material is the same thickness, I use the infinity setup guage, it woks with any thickness.
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post #7 of 30 (permalink) Old 01-17-2019, 07:16 AM
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+1 on the infinty set up jigs.
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post #8 of 30 (permalink) Old 01-17-2019, 07:58 AM
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I've got a few as I was trying to use these on 1/2" plywood drawers. It was a mess and most likely due to the quality of the plywood. I also bought a Whiteside after not doing so well with the Infinity bit. I don't have a local source for Baltic Birch plywood and expect my results would have been different if I had. Using these bits on solid wood was much better and I've resolved myself to using hardwoods for my drawers going forward. Quality plywood is just too hard to get at home. There is a wood supplier about an hour away but they have very restrictive hours for the hobbyist and I think they sell 5x5 sheets. I really need to get down there and check them out. Company called Wurth Wood Group> I don't know a thing about them or what their pricing is like but it sounds like it might have to be a journey made.
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post #9 of 30 (permalink) Old 01-17-2019, 09:53 AM
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Mlcs has great bits and I use them all the time. As mentioned if you plan on doing hundreds of drawers then maybe you should be looking at other brands. But if you are a typical woodworker then they are all you will ever need. Having said that, unless you are a glutton for punishment I would stay away from the lock miter bits. In the time it takes to set the bit up you could build the entire drawer using traditional methods. It won't make the drawer any stronger and you will still need to make other cuts or the bottom. in addition the sides will have to be thicker which doesn't necessarily make them look better.
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post #10 of 30 (permalink) Old 01-17-2019, 12:20 PM
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Quote:
Originally Posted by sreilly View Post
I've got a few as I was trying to use these on 1/2" plywood drawers. It was a mess and most likely due to the quality of the plywood. I also bought a Whiteside after not doing so well with the Infinity bit. I don't have a local source for Baltic Birch plywood and expect my results would have been different if I had. Using these bits on solid wood was much better and I've resolved myself to using hardwoods for my drawers going forward. Quality plywood is just too hard to get at home. There is a wood supplier about an hour away but they have very restrictive hours for the hobbyist and I think they sell 5x5 sheets. I really need to get down there and check them out. Company called Wurth Wood Group> I don't know a thing about them or what their pricing is like but it sounds like it might have to be a journey made.
I have them cut the sheets into 3'X5', and 2'X5' to get into my van, besides I can't handle a 5'X5'

@mgmine , I am with you the first time I used the lock miter bit, I must have use a whole sheet of plywood scraps trying to get it right, then gave up. I would recommend a Drawerlock bit myself.
Herb
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Last edited by Herb Stoops; 01-17-2019 at 12:31 PM.
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