DR 4pro single pass half bind dovetail problems

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Forum topic by RWininger posted 10-09-2016 06:50 PM 979 views 0 times favorited 10 replies Add to Favorites Watch
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23 posts in 2229 days

10-09-2016 06:50 PM

Got this about a year ago, just getting around to setting it up in trying it out. Spent The last few nights trying to get it worked out keep running into same problem. Tails are coming out over sized and not fitting into tail socket. I’m sure it’s something simple or overlooking. Been going off cutting depth chart but not doing some right

10 replies so far

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23 posts in 2229 days

#1 posted 10-09-2016 06:57 PM

Using 3/4 inch wood face and sides
The 80-8 Leigh bit
1/2 on the scale
E7 bushing and standard 7/16(tried both)

View pintodeluxe's profile


5758 posts in 2962 days

#2 posted 10-09-2016 07:10 PM

Bit depth is the primary adjustment for half blind dovetails. For joints that are too tight, make a shallower cut. It is counterintuitive at first, but it works. I have three dovetail jigs, and they all work that way.

Don’t give up on it, you’re close!

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View Redoak49's profile


3532 posts in 2137 days

#3 posted 10-09-2016 07:14 PM

Watch one of the videos and or read the manual. It appears that the depth of the router bit is not right. The manual will tell you how to adjust the router bit depending on if the joint is too tight or too loose.

The first time just takes a bunch of tries and adjustments.

I found the manual very good but the devil is in the details.

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23 posts in 2229 days

#4 posted 10-09-2016 08:28 PM

I’ve been going off the chart in the book on the depth. I’m measuring the depth on the Tailboard I’m setting my rotor up accordingly to that . Plus an 1/8 minus 1/8 up and down.
I think I’ve watched almost all the videos and they never seem to show how they come up depth .
I must be just way off in left field, I’ll keep plugging away

View Andre's profile


2069 posts in 1955 days

#5 posted 10-09-2016 08:51 PM

Buy a marking knife, D.T. Saw and couple of Chisels then spend some quality time with your favorite wood?

-- Lifting one end of the plank.

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23 posts in 2229 days

#6 posted 10-09-2016 08:58 PM

after I pound out some new kitchen drawers for the wife , I might just dive down that rabbit hole

View JBrow's profile


1366 posts in 1069 days

#7 posted 10-11-2016 12:41 AM


I have no experience with Leigh dovetail jigs, but I have a thought.

It appears from the photo that while the router bit depth of cut may not be set exactly for the proper depth, I doubt the depth of cut is the problem. It appears to me that the pins are too wide for the corresponding sockets. It also appears that you are pretty close to the correct depth.

Since the pins appear to be wider than the sockets, increasing the spacing between the sockets slightly could allow the joint to come together. Double checking the spacing between the fingers on the jig to ensure the Leigh Spacer fits snugly between the fingers could reveal the problem.

I am sure you have already seen this How to Cut Single Half-Blind Dovetails on Leigh’s web site, but if not, it runs you through an overview of the steps for setting up the jig for half blind dovetails.

View OggieOglethorpe's profile


1276 posts in 2259 days

#8 posted 10-11-2016 12:53 AM

I sold my D4 years ago…

That said, it can be an accurate tool. Did you follow the manual steps for setting up and calibration?

I sold mine because I don’t frequently make the same part many times. If you do, the D4R is great. Read the manual, and don’t skip steps or assume details don’t matter. You’ll be fine.

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23 posts in 2229 days

#9 posted 10-11-2016 11:46 PM

I guess I got it figured out,user error! mainly just had to realign my router to the gide bushing.
Just have to fine-tune now and get some flater boards and i will be on my way.
Thanks for all the input

View Redoak49's profile


3532 posts in 2137 days

#10 posted 10-12-2016 11:00 AM

Glad you figured it out. It is not the easiest dovetail jig but one of the best. When I got mine, I struggled and made a lot of practice joints to get it right.

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