tight fitting dominos

jfr

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Joined
Mar 8, 2007
Messages
5
I have used my new Domino to build 3 projects thus far. I am having an awful time dealing with how tight they fit. After I complete a dry fit,  I have had to remove the domino from the mortice by using a set of vice grips and hammer. I was wondering if others are having this problem or am I doing something wrong. .
 
I just grab them with the claw of my hammer and they pop right out. They are tight, but the claw digs in just enough to get a grip on them, yet doesn't ruin the dominos. Put the vise grips away and try a claw hammer, I'm sure you'll find it works better.
 
I have used a small vice grip to remove the domino but have not had to resort to the hammer.  I was thinking of trimming a few "dry fit" Dominos with a handplane to make it more of a slip fit soley for the purpose of dry assemblies.  I have had the Domino for all of 5 days so it is too early for me to have all this noodled out.
Steve
 
I've had to use pliers to grab some of the dominos.  Not much force was needed though.  If that's the price for tight fitting joints I'll gladly pay it.

PaulD
 
All the one I've used so far have been tight and only a couple were a slip fit. The ones I removed were hard coming out. I'll try the hammer claw the next time.
 
This morning I tried the claw on the hammer approach to removing dominos ( after dry fit) and it works good. I probably never would have thought of that approach. Ideas and discoveries made by others that are shaired in these forums is surely the best part of these sites. Thanks very much..
 
Now, I'm not an owner, but it seems to me I read that the first one should be tight (for alignment) but the remaining domino mortises on a joint are supposed to be cut with a proverbial hair of play. Are you making those adjustments as you cut the mortises?
 
There are three settings on the Domino for the width of the tenon. The first is for a tight fit, the other two are for a wider fit. The first position is the same width of the domino and the 2nd is 6mm wider and the third 10mm wider.

The thickness of the domino tenon is what is tight.
 
Since the thickness makes the fit so snug,
maybe a few swipes across a sheet of sandpaper
would adjust a domino for a slippier fit?
 
I was thinking of doing that this afternoon, swiping with some 80 grit paper. I have more walnut to edge join.
 
Jim, Actually I cut them all the same. I read about making some of the mortises larger with next selection on the Domino but that is if you are doing a very large item with many dominos and are worried about measuring errors. But as of yet it does not need to be done for me. The fit is perfect everytime and I have done as many as 20 tenons at one time and with zero measurements.

Yes the dry fit is tight but I can usually get them out with my hands or just a small tap to the side with my 12 oz hammer...
 
Love the claw hammer idea.

For what its worth, I'm taking some classes at the local community college and the standard there is that a tenon should go into the mortise with hand pressure and require a dead blow hammer to come out.  This is with traditional methods, not Domino...
 
I told you guys that you'd like the claw idea. Us long time carpenters are good for something at least.  ;D

I haven't needed to introduce any slop into my mortises yet either. The most dominos I've used in a joint yet was only 8, but I had no problem whatsoever getting them to align perfectly. I doubt I'll use the 6mm and 10mm settings for slop very much.
 
Hi everyone,

I'm new here and I guess from my Avatar you can see why I stay in the dark. ::)

I've had a Domino for about 12 months now and thought I'd share my experience with the dreaded tight domino.
The tenons are made of solid timber, compressed along the grooved sides. As such, they react to atmospheric changes like any timber would. (I think they are Euro Beech.) In conditions of high dampness and humidity, they will swell, sometimes by up to 1mm, not necessarily across the entire domino, but not all dominoes. In this situation, the precision of the joint really shows and dominoes showing any swelling may become hard to insert and even harder to remove, since you are pulling rather than pushing and have the resistance of the workpiece to contend with also. There are three solutions, that I have encountered among seasoned Domino users.
1. Keep the dominoes in an airtight bag in a warm environment between uses.
2. Go through all your dominoes and select the ones which have not swollen, then keep these somewhere for using in dry knockups only.
3. Nuke the dominoes prior to use in a Microwave.
or, move to Arizona ;D.

Option 2 is the one I use.

Regards,

Albert

 
Albert Davies said:
Hi everyone,

I'm new here and I guess from my Avatar you can see why I stay in the dark. ::)

I've had a Domino for about 12 months now and thought I'd share my experience with the dreaded tight domino.
The tenons are made of solid timber, compressed along the grooved sides. As such, they react to atmospheric changes like any timber would. (I think they are Euro Beech.) In conditions of high dampness and humidity, they will swell, sometimes by up to 1mm, not necessarily across the entire domino, but not all dominoes. In this situation, the precision of the joint really shows and dominoes showing any swelling may become hard to insert and even harder to remove, since you are pulling rather than pushing and have the resistance of the workpiece to contend with also. There are three solutions, that I have encountered among seasoned Domino users.
1. Keep the dominoes in an airtight bag in a warm environment between uses.
2. Go through all your dominoes and select the ones which have not swollen, then keep these somewhere for using in dry knockups only.
3. Nuke the dominoes prior to use in a Microwave.
or, move to Arizona ;D.

Option 2 is the one I use.

Regards,

Albert
Welcome Albert!
Good to hear from someone with some substantial Domino experience!  Has the swelling of the dominoes ever caused a joint to fail or a piece to crack in your experience?  I already live near Arizona and I wonder what would happen if I sent something built with dry dominoes back to the land of humidity?  Maybe I should use the 'loose fit' settings...
 
Hi Jesse,
I wouldn't worry about the strength of joint as the glue up process will still be the same, you will have a tight joint. Our humidity goes from 40 something% to 90% and I dont see any issues. Its really only when you use tenons exposed to the air that this is seen.
The 2nd and 3rd width cuts are great for long panels as you have a reference point of one cut width then expand out to two, then three cut widths, so that one person can just slide the joint together. For stile and rail joints it pays (IMHO) to use a single cut width carefully marked out on both pieces. The strength you get is beautiful and really easy to obtain.

Hope this answers your questions,

Albert
 
Albert, Thanks for the info, I could have sworn that I heard that Bill who posts here soaked some dominos for two weeks in water and none of them swelled. I could have heard wrong. Yes they are beechwood native to Germany...
 
Hi Ted,
Just to let you know what I did.
I took 2x each size domino straight from the Systainer on a rainy day, just after a humid spell and used an digital caliper to take measurements at each end and the middle and recorded them. After 10 hours in a warm, heated room, I took the measurements again and there was quite a variation of change. In all cases the dominoes had returned to the expected size after "drying" and I think the worst was a 4% change based on final reading/initial readingx100. Crude but shows the point. No disrespect meant to anyone here, this is just what I and some others found to be the case. It really is only to help with dry knock up, where you don't want to fight with the tenons when you're keen to get on to actual glue up :)
Oh and I can remember saying to someone at the time, Well, the guys on the East Coast and Southern states of the US are going to love this. ;D ;D
I forgot one thing. The swelling is not particularly large, nor is it an ever increasing thing. It is possible that a domino which has reached it's maximum expansion could be soaked and show no appreciable change with time. Just a thought.

Regards

Albert
 
My recently acquired Domino set came with oak dominos.  Each of the six plastic bags within the Systainer is so labeled.  My first project involved joining hard maple edging to some melamine coated particle board shelving.  Some of the dominos were a tight dry fit.  To remove those, I used a pair of water pump pliers and a simple light squeeze and tug.  No need for vise grips.  No damage to the tenons.

Dave R.
 
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