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Reverse Glue Joint Setup Guide

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To set this bit up I’ve taken two pieces of 20mm Pine and marked one ‘A’ and the other ‘B’
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Next, on one of the pieces, I marked a centre line (right->).

You are trying to set the centre of the bit with the centre line on your board. This is hard to do, so just get as close as you can.

I’m setting the fence so that the bottom cutter is level with it.

You must make sure you turn your router speed to a low speed, CMT recommend 18,000 rpm for this bit.

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Run ‘A’ through first (faceup).
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And then run ‘B’ through (face down).
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Here’s the first result. Its hard to see but ‘A’ is slightly higher than ‘B’. To get it right I have to higher the bit ever so slightly (This is where the fine height adjustment comes in handy on the router).

If ‘A’ was lower then ‘B’ you would lower the bit. It works out you higher or lower the bit about half the distance of the error.

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Here’s the first result. Its hard to see but ‘A’ is slightly higher than ‘B’. To get it right I have to higher the bit ever so slightly (This is where the fine height adjustment comes in handy on the router).

If ‘A’ was lower then ‘B’ you would lower the bit. It works out you higher or lower the bit about half the distance of the error.

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And here’s a picture of the final look. If you save the test pieces then the next time you use this router bit with the same thickness wood, the setup time will be seconds.
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You can buy the CMT Reverse Glue Joint Bit from Axminster Power Tools!

1/2″ Shank 855501

Axminster:- Tel: 0800 371822 Website: www.axminster.co.uk
 

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