Enlarging a template by exactly the size of the cutter-bushing gap? - Page 2 - Router Forums
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post #11 of 45 (permalink) Old 09-15-2019, 01:55 AM
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Originally Posted by Inor View Post
Disclaimer: The following rant is mostly meant in humor, but there a few tidbits of truth to found as well. I leave it to you, the reader, to figure out which is which.

We are woodworkers! We don't DO metric! The English invented the Imperial System of measurement and they are still the best woodworkers in the world. Yeah I know, the Limeys caved in to the rest of the world and stupidly adopted the metric system years ago. If that bothers you, go punch a Limey. As for me, I would prefer to get them to teach me to properly sharpen Robert Sorby chisel.

Yes I agree, it is much easier to add and subtract numbers using the metric system. But division is a serious pain in the neck! What is half of 1/16 inch? Double the denominator and come up with the answer 1/32 inch. What is a third of 1/16 of inch? Triple the denominator and come up with 1/48 inch. Easy math to do in your head. I do a LOT of division when building stuff.

What is half of a millimeter? Now you have to switch number systems entirely. What is next smaller system from millimeter? - A penismeter? So half a millimeter is 5 penismeters? Dumb!

Complain all you want about the Imperial Measurement system, based on hexadecimal numbers, but it has served us pretty well. The computer, phone or tablet that you are typing on as you read this is also based on the same system.
Try reading through this thread and then get back to us Inor: https://www.routerforums.com/guide-b...surements.html

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post #12 of 45 (permalink) Old 09-15-2019, 02:04 AM
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Ashley the best way to see if a router bit will work at those 3 depths is to try one. 3/4 is only about 1mm smaller than 20 so it would give the same results. I think the 1/2" depth would be okay but I'm not sure about the deeper ones. If the bit can't clear the chips then they tend to run hot and the heat shortens the bit life. A US company that I know that makes a lot of metric sizes is Onsrud. You might try them and the bits are excellent quality.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #13 of 45 (permalink) Old 09-15-2019, 02:10 AM
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I'm having a major problem imagining what you are going to make. So I would need to know that, and see a picture of the pattern you say you have, before I could picture it in my mine. I'd likely have different ideas of how I would do it with that info. And if the holes are to be 1/2" deep I'd probably drill holes thru 1/2" material, then glue that to a solid piece of 1/2" material, or 1/4", 1/8", or whatever..

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post #14 of 45 (permalink) Old 09-15-2019, 08:34 AM
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Take a look at the Parf Guide - make the top any size that you need.

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post #15 of 45 (permalink) Old 09-15-2019, 08:57 AM
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https://imaginewoodworking.com/ sells a oversized 1-1/2 and 2" template guide bushing which makes using a 1/2" bit. Much easier math too.
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post #16 of 45 (permalink) Old 09-15-2019, 11:39 AM
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@AshleyJ Can you possibly provide a drawing of what the final product will look like. A drawing one hole in the pattern will suffice. It seems to me there are simpler ways of achieving tour goal than what you propose.

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post #17 of 45 (permalink) Old 09-15-2019, 03:03 PM
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I'd used the original template and something like this https://www.toolstoday.com/flush-tri...l-bearing.html

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post #18 of 45 (permalink) Old 09-15-2019, 04:49 PM
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Have you considered the Lee Valley dog hole bushings and bits (pg 270 of the Canadian catalogue download). They have 3/4” and 20 mm available.
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post #19 of 45 (permalink) Old 09-16-2019, 12:26 AM
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Here's a complete template, including the guide bushing. You can buy for 3/4" or for 20mm. It's designed for use with a Whiteside 1/2" upcut spiral bit. https://www.woodpeck.com/routing/rou...-jig-2019.html

It's pricey, but that's par for the course for Woodpeckers stuff. I have one of these for 20mm, but haven't tried it out yet. I bought it when I was between CNCs, but didn't get to the project I bought it for. I'm just finishing up my CNC, so will probably use it to cut my MFT-like cutting table (longer than an MFT). I also have the UJK Parf Guide System Tom mentioned. Both are very nice and will speed you on your way. Since you have a preference for using a router, the Woodpeckers system would probably be more to your liking. If you are interested in the UJK Parf Guide, get it here: https://tsoproducts.com/workholding-...-guide-system/ The shipping will kill you, if you order from UJK in England. Take a look at the cool stuff they have from UJK, and TSO's own products. Not a lot of products, but what they have is worth looking at. If you use a Festool track saw, their clamp on GRS-16 works remarkably well. I've used one for a couple of years or so. It's one of my go to accessories. Very accurate.

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post #20 of 45 (permalink) Old 09-16-2019, 12:57 AM
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Quote:
Originally Posted by gmedwards View Post
Here's a complete template, including the guide bushing. You can buy for 3/4" or for 20mm. It's designed for use with a Whiteside 1/2" upcut spiral bit. https://www.woodpeck.com/routing/rou...-jig-2019.html

It's pricey, but that's par for the course for Woodpeckers stuff.
If that's what you all are talking about, be no biggie to make one. I don't like to buy what I can make, especially at Woodpecker's price.

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