| Project by Bob #2 | posted 280 days ago | 2150 views | 16 times favorited | 22 comments | ![]() |
I don’t know wether I should be praising the merits of the Grr-ripper today or explaining the build of my new box joint jig.
This picture shows how useful the Grr-ripper can be when working with small stock and needing dead on accuracy.
The part cut is oak and will be the guide bar for my 1/4” box joint template.
I cut it in a matter of seconds in complete safety and it measures 1/4” on both ends of the stick. That’s first for me as the saw usually creeps up on the loose end of a piece like this. I would not attempt this without a grr-ripper on a table saw.![]()
With the gripper I was able to cut 3 keys for the jig in less than 3 minutes including set up time.
I set the saw gap with metal lathe cutting tools that just happen to come in fractions so I have a range of them from 3/16” to 1/2” and use them instead of measuring. (look for them at any tool shop that sells metal lathes.
The Grr-ripper allows one leg to sit on top of the wood while the other leg can be adjusted to balance the rig when passing over the blade.
a href=”http://home-and-garden.webshots.com/photo/2141547060101907180rTXpgV”>![]()
I left the keys full length for the glue up so they would rest on the base of the jig and be parallel to the sliding table
I’ll cut them off long enough to hold a series of boards for gang cutting the box joints. Incidently, that is why I abandoned my other style of jig. This seems like it will give me more control over the cuts.![]()
The way I positioned the keyway is shown here.
I cut the first a slot in the jig dead center and just slightly higher than 1/4”.
I want the ends of the joints to be just proud of the sides for finishing.
The method for getting the keyway position is simple now.
Just put the first keyway in the first slot and and a suitable key spacer next to it. ( in this case the 1/4” measuring bar stock.
Lock the jig at the back and run the lslot.
What I have now is a “carriage” with the keyed jigs mounted on the front.
The carriage follows the outside of my router guide bushing allowing me complete freedom to push and or pull the stock past the cutter.
I don’t have to line up the router bit anymore as the brass bushing takes care of it as long as the router dosen’t move in the table. a caution for those of you that pull your router out for other tasks.![]()
Here’s a shot of the bushing I used. I used a fairly large one – (3/4”) in anticipation of also using this jig to cut my pins for dovetails. ( more on that later)![]()
Today I had time to run some 5/16” stock and test the jig for spacing and accuracy.
It took a bit of getting used to so I ended up cutting about 5 joints before I got the hang of it but here’s what you should be able to get with this jig:![]()
I will now make notes in my log book for future reference. This generally shortens my setup time next time I use the jig.
p.s.
This is the jig I made first , then realized it used a lot of materials up ofr eah size change.
A pic showng the front of this jig:![]()
-- A mind, like a home, is furnished by its owner
Your Online Shop - Your Support Is Greatly Appreciated - Your Woodworking Showcase - 3 Ways To Help, Financially - Your Woodworking Community

























22 comments so far
Grant Davis
home | projects | blog
261 posts in 297 days
posted 280 days ago
Nice looking jig Bob. I am adding that one to my archive for future to do’s.
-- Grant...."GO BUCKEYES"
Thos. Angle
home | projects | blog
3246 posts in 351 days
posted 280 days ago
Bob,
This is a very useful affair. I have never used a bushing in a router table. How do you do that? My FX lift is not equipted for them(I don’t think). Maybe I dshould take a look. Anyway, a good looking jig.
Tom
-- Thos. Angle, Owyhee Design, Oregon
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
I made the usual type that screw/clamps to the table top last week and then discovered I would probaly end up with 3 jigs lying around for different sizes of joint.
Bill Hylton gets the credit for this in his router book
I apologise for the pics – they are not my best work. I think my camera is on its last legs.
Tom I am not familar with your set up but I imagine it should take bushings.
I just checked the website and they tell us this Tom:
”Insert plate center hole (3-5/8” overall diameter) is machined to accept larger raised panel bits and includes 1-1/2” insert ring. ”
So you should be alright getting a set of bushings.
Bob
-- A mind, like a home, is furnished by its owner
Thos. Angle
home | projects | blog
3246 posts in 351 days
posted 280 days ago
I’m going to the shop for a few minutes before church and will check. If it does it would only be a few because there are different size inserts.
-- Thos. Angle, Owyhee Design, Oregon
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
Tom, I am thinking that the insert ring is there to recieve 1-1/2” bushings. the come in two sizes out there so be sure to get the right ones for your set up.
Bob
-- A mind, like a home, is furnished by its owner
Tony
home | projects | blog
519 posts in 419 days
posted 280 days ago
Bob. Nice Jig. I was wondering why you preferred to use the router table over the table saw for cutting the box joints?
By the way, I have the Jessem system for my router table and the Jessem inserts take ALL the standard bushings as well.
-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
Hi Tony:
The dado blade sets that you buy have often have little sharp projections on the outside edges of the blades.
This can give the joint little dog ears which are unsightly.
The spiral bits give me a dead flat joint.
The second reason is that I find setting up the dado a bit frustratiing in that I have difficulty getting my big hands in the table top on my saw.
I can do it but I usually drop the blade nut and have to go get the magnetic pick up for it.
The jig I made can be switched in a minute from 1/4” to 5/16” or 3/8 or 1/2” buy just putting on a new face plate.
It can be a bit more fiddly with the saw.
Lastly it is easier for me to sneak up on the joint with the router than it is with the table saw.
p.s. The jig will also accomodate a dovetail bit and let me do rapid through dovetails (at least the pins)
More on that later as I experiment with my Fein Multimaster and dovetail joints.
Bob
-- A mind, like a home, is furnished by its owner
TheGravedigger
home | projects | blog
180 posts in 413 days
posted 280 days ago
An alternative would to be to rig a slide for your t-track or miter slot, if you don’t have bushing capability that is.
Y’know, as I think about it, standard key stock might be useful here. Hmm…
The Grr-Ripper gets my vote as well. I have one, and like it so well I ordered a second one last night while Rockler had them on sale!
-- Robert from Raymond, MS. "We are what we repeatedly do. Excellence is therefore not a practice, but a habit." - Aristotle
Bill
home | projects | blog
2508 posts in 550 days
posted 280 days ago
A great looking jig Bob. Do you get much tear out with the bits?
-- Bill, Turlock California, http://www.brookswoodworks.com
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
Ray:
I am stuck with the bushing set up with my older Lee Valley steel top as it has no miter slot.
The trade off is that it has a unique quick clamp system for the router should I ever have to remove it and a great system for inserts that only need a 1/4 turn and sit dead flat.
As for the key stock and or cutters from the metal lathe , they are really accurate and take the pain out of setting my table saw and the router for small measurements. You can gang them up for odd cuts too.
Key stock is cheap and plentiful.
Bob
-- A mind, like a home, is furnished by its owner
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
Hi Bill:
I am using more spiral bits than I used to so the tearout is not as significant as with the standard two flute bits.
However, The nature of the backing help prevent blowout when making the cut asn does a light touch,
I try ot take a slow but steady push going through the back of the wood and keep the bit speed up to prevent stalling and burning.
Bob
-- A mind, like a home, is furnished by its owner
WayneC
home | projects | blog
5693 posts in 486 days
posted 280 days ago
Tom the insert that takes the bushing is the one that comes with the lift. It has a slight rabbit around the edge. I can dig out my bushings and take a photo if you like.
-- We must guard our enthusiasm as we would our life - James Krenov
Thos. Angle
home | projects | blog
3246 posts in 351 days
posted 280 days ago
Bob and Wayne,
I just got back in from the shop. I found the insert that takes the bushings. this may open up a wholenew way of thinking on jigs and fixtures. Thanks, guys.
-- Thos. Angle, Owyhee Design, Oregon
Bill
home | projects | blog
2508 posts in 550 days
posted 280 days ago
Speaking of the Gripper, I see Rockler has the Gripper push block on sale right now.
-- Bill, Turlock California, http://www.brookswoodworks.com
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
Bill:
That’s the basic unit that’s on sale. ( GR-100)
I would suggest that if this is your first one that you get the GR-200 that has the stabilizer plate and adjustable spacer with it.
If you have to buy them separately, the run $26.95
If its your second unit you may no need the above.
Cheers
Bob
-- A mind, like a home, is furnished by its owner
jockmike2
home | projects | blog
3821 posts in 635 days
posted 280 days ago
Good looking jig Bob, I think I’ll have to make one. I don’t like the ones I’ve made with dado blades. Too much vibration from my saw I think. This looks easy and neater. very cool, Mike
-- Mike. Profisher50@yahoo.com
WayneC
home | projects | blog
5693 posts in 486 days
posted 280 days ago
Great Jig.
Woodcraft has gripper on sale this month. Just saw the new filyer.
-- We must guard our enthusiasm as we would our life - James Krenov
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
That’s the basic unit that’s on sale. ( GR-100)
Wayne;
I’d suggest that if this is your first one that you get the GR-200 that has the stabilizer plate and adjustable spacer with it.
If you have to buy them separately, they run $26.95 extra
If its your second unit you may not need the above.
Cheers
Bob
-- A mind, like a home, is furnished by its owner
WayneC
home | projects | blog
5693 posts in 486 days
posted 280 days ago
I went back and checked. Woodcraft has the Gr-200 on sale for $69.99 and a handle bridge set for $13.99. Ad says save 10%. This is for the month of October.
Rockler is the GR-100.
-- We must guard our enthusiasm as we would our life - James Krenov
Bob #2
home | projects | blog
1630 posts in 410 days
posted 280 days ago
That’s about as fair as I have seen out there for the Gr-200.
It’s worth every penny to me now that I have one.
Bob
-- A mind, like a home, is furnished by its owner
DAN
home | projects | blog
2584 posts in 372 days
posted 274 days ago
this is a great posting ! jig looks terrific
-- a legend in my own mind ...
mot
home | projects | blog
4831 posts in 425 days
posted 248 days ago
How’d I miss this? Having gotten to see this jig in action on the weekend, this is something really worth building. Thanks Bob!
-- You can discover more about a person in an hour of play than in a year of conversation. (Plato)