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| Template vs. Bit Depth http://luthiersforum.com/forum/viewtopic.php?f=10123&t=52967 |
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| Author: | dreric [ Sun Feb 23, 2020 4:58 pm ] |
| Post subject: | Template vs. Bit Depth |
Hi there, Long time lurker trying to develop the skill set to made guitar with an angled neck joint. Specifically, I'm trying to make a few Les Paul Juniors. These guys have a 3 degree neck angle. So I built a Myra jig: http://www.mykaguitars.com/tools/neckpocketjig/. and a particle board jig with 3 degree wedges. The issue I'm having is that the corners of the neck pocket are a 3/8th radius, I have router bits but they are not long enough. The neck pocket is supposed to be 1 3/8" at the deepest, I can get the bit in the router to cut that deep but not with the height of the template 1/4" or the Myra jig 3/4". Yes I could use a larger bit but I can't find a top bearing 3/8" that is long enough to accommodate the height of the template and achieve the 1 3/8" depth. How have others solved this problem? |
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| Author: | klooker [ Sun Feb 23, 2020 5:11 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
This was years ago, but I think I used a 1/2" bit. Why do you have to use 3/8"? Kevin Looker |
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| Author: | dreric [ Sun Feb 23, 2020 5:33 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
I have to use the 3/8 bit because of the curve radius on the heel of the neck. I made them from a template set, in retrospect I would make the necks with a 1/2 radius. |
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| Author: | klooker [ Sun Feb 23, 2020 6:51 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
You can rasp or file it to 1/2". I wouldn't fret it (no pun). |
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| Author: | Mike_P [ Sun Feb 23, 2020 8:09 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
3/8" radius??? that equates to a 3/4" diameter... I just bought a 1 3/4" long cutting edge top bearing pattern bit last week that had a diameter of 3/4" which resulted in a 3/8" radius inside corner...Amana...they make them from 1 1/4" to 2" long |
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| Author: | klooker [ Sun Feb 23, 2020 8:16 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
Radius, diameter, 220V, 221V, whatever it takes... |
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| Author: | Freeman [ Sun Feb 23, 2020 11:43 pm ] |
| Post subject: | Re: Template vs. Bit Depth |
I've done a number of angled set necks. I first plane the neck angle into the top at 3 3-1/2 degrees. I drill out as much waste as I can, then screw my neck pocket template directly on to the top - it is just 1/4 inch MDF. I'm pretty sure my bid is 3/8 diameter - the bearing follows the template, then as I move deeper it follows the walls of the cavity. I end up with the floor of the cavity at the same angle as the top. I use the same template to size the tenon - I want it to fit snugly. When I route the mortise I put a layer or two of masking tape on the bearing surface - that way its a hair smaller and I can sand to fit. Attachment: IMG_5942-1.jpg
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