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Issue with Porter Cable Dovetail Jig 4212

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Forum topic by Gregg M. posted 09-14-2017 12:54 PM 345 views 0 times favorited 9 replies Add to Favorites Watch
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Gregg M.

193 posts in 1491 days


09-14-2017 12:54 PM

Topic tags/keywords: half blind dovetail jig porter cable baltic birch plywood drawers

I recently bought the PC Dovetail Jig 4212 to make half blind dovetails in 1/2” (actual 12mm) Baltic birch drawers. I had used another PC jig prior to getting this one. They are very similar. I am using the 3/4 bushing and hte dovetail bit provided. I spent time time adjusting the jig to get a good fitting joint. While the joint fits good and looks good, there are visible gaps on the inside of the drawer (see pictures). I don’t believe there is anyway to fix this. Has anyone else had a similar problem routing half blinds in 12mm baltic birch?

Gaps visible from inside drawer

Good fitting joint on outside of drawer

-- Marvel Woodworking, West Chester, PA - http://www.MarvelWoodworking.com


9 replies so far

View bbasiaga's profile

bbasiaga

991 posts in 1804 days


#1 posted 09-14-2017 01:12 PM

Your guide plate is too far back, allowing you to push the router too far back and make that slot too deep. Try sliding it forward a bit.

I have the PC jig. All of these seem to be a bit finicky but once set up are very repeatable.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View Bill White's profile

Bill White

4787 posts in 3770 days


#2 posted 09-14-2017 01:35 PM

I have the 4210, and I agree that the plate needs adjusting a bit.
Fiddly for sure at first, but once set up, it works well.
Bill

-- bill@magraphics.us

View Gregg M.'s profile

Gregg M.

193 posts in 1491 days


#3 posted 09-14-2017 01:48 PM

Thanks Brian…I have tried moving the template forward to reduce the depth of cut on the pins. That just ends up making the tail sit proud of the pin sockets. Looks like there is another issue.

-- Marvel Woodworking, West Chester, PA - http://www.MarvelWoodworking.com

View Jim Jakosh's profile

Jim Jakosh

19567 posts in 2915 days


#4 posted 09-14-2017 02:21 PM

We just had a demo on that jig at our guild with 1/2” stock and there were no gaps. It must be an adjustment.
The guy that put on the demo teaches it at woodcraft.

His name is Dale Smith. Give him a call at 616 560 1219

Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View GR8HUNTER's profile

GR8HUNTER

2866 posts in 522 days


#5 posted 09-14-2017 02:34 PM

IMO ….I think it is your wood thickness …cuz 12mm is not quite 1/2 inch as that jig is designed for

-- Tony Reinholds,Pa. REMEMBER TO ALWAYS HAVE FUN

View Gregg M.'s profile

Gregg M.

193 posts in 1491 days


#6 posted 09-14-2017 02:42 PM



IMO ….I think it is your wood thickness …cuz 12mm is not quite 1/2 inch as that jig is designed for

- GR8HUNTER

I think you are correct Tony. The BB ply that I picked up was suppose to be 1/2”. What they sold me was 12mm BB ply instead.

-- Marvel Woodworking, West Chester, PA - http://www.MarvelWoodworking.com

View bbasiaga's profile

bbasiaga

991 posts in 1804 days


#7 posted 09-14-2017 06:08 PM

Perhaps you could solve that by finding a metric equivalent dovetail but that was slightly smaller in diameter.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

View bandit571's profile

bandit571

18411 posts in 2493 days


#8 posted 09-14-2017 06:14 PM

Move the guide forward…..to ease the tails into the sockets, use a chisel to “square” the rounded cuts off. BTDT

This was also the last time I ever used that jig…

-- A Planer? I'M the planer, this is what I use

View Gregg M.'s profile

Gregg M.

193 posts in 1491 days


#9 posted 09-14-2017 07:57 PM

I will give that a try. A lot more work than I had anticipated. Next time I will use thicker drawer stock.

-- Marvel Woodworking, West Chester, PA - http://www.MarvelWoodworking.com

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