Clamping handles?

Joined
Jan 19, 2009
Messages
312
Hi all, I've been working on my handles for a while and seem to run into the greatest amount of problems attaching my scales to the tang. I'll give you a little rundown of how I am going about it and then maybe you will have a suggestion or two. I start with tracing my tang outline on the pieces of wood I'll be using. After that, I rough cut them on the band saw leaving a little bit of extra diameter so there is some wiggle room. I then tape the scales together and sand the front edges down and work them to a final finish (as it would be very difficult to do after it's attached to the blade without scratching up the Damascus.). I then make sure my scales and tang are nice and flush (usually sand them flat on the belt sander with a fine grit). Then I mix up my epoxy for the first scale. I have two options at this point. Use an air powered vise (watch the fingers!) or a manual one. It depends on the knife but I usually opt for the manual. I can usually get my first scale exactly where I want it (the most important part being where it meets the blade.) After the epoxy is good and set I drill my holes through the first scale and prepare to attach the second. This is where I get into trouble. Once the epoxy is mixed I apply it like the first and use the vice to clamp it down. The problem is with the layer of wet epoxy, I get some slippage and it is hard to see that it's happened while it's in the vice. Only after my epoxy is good and set do I find out that the two front finished ends do not line up perfectly because of the slippage that the vice is causing. My question to you is how do I get that second scale on there to line up with the first while using a vice? I would consider using C clamps but I've found that the even pressure over the whole tang and scale is much better at not getting gaps between the wood and tang when it comes to the final finish. If anyone has found a better way than what I'm using, I'd be really interested to hear. One thing I did try this weekend is to let the epoxy set most of the way and then clamp it down minimizing the amount of movement on the second scale. They still do not line up perfectly. Anyway, I hope I was clear on my problem and hopefully someone has a trick I haven't thought of. Thanks in advance! Here's a gratuitous picture of my last knife:

4529636720_02bc0f4953_b.jpg
 
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If I'm using liners I glue them to the scales before anything else.

I drill my scales before finishing the front and use the pins as well as tape to align them. Then I epoxy the scales, pins and tang together with some small spring clamps. Too much pressure is likely to just squeeze the epoxy out so the little clamps are enough.
 
Try marking and drilling one scale (without epoxy) then tape the two scales together to transfer the holes. After that, epoxy and pin at the same time. You shouldn't have to put it into a vice. That is way too much pressure. Just use quick clamps inbetween the pins. This works really well for straight tangs... tapered tangs are a bit more difficult... but doable.

Rick
 
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Ha ha... Good Lord. I thought it would be simple...Duh! :D See I've never had any instruction or read up on it very much so I was just going about it the way I figured it was done. Thanks guys, you've got the gears cranking in my head now!
 
Yes, use the pins to keep things lined up during glue-up. If there are no pins, that's when it gets tricky, but sometimes you can hide a "blind' pin or dowel.

If you can get some rubber surgical tubing, that works well to clamp irregularly shaped things together. Just stretch and wrap and tuck the end under a wrap to secure it. It will stay on tapered objects fairly well.
 
Ditto on using the pins for alignment.
Ditto on too much pressure. If there are gaps, then it isn't flat enough(learned the hard way, I did)
I have found that 3-4 rubber bands is enough pressure, evenly spaced.
 
I'm in the middle of my first build and this is my plan.
Please let me know if you guys see any flaws.

I was going to drill two small (1/8" or so, for a 10-32 screw size) holes in the tang where the 1/4" corbys will end up.
Then clamp one scale to the tang and drill it, using the tang as a guide.
Repeat with the other side.

Now using the 10-32 screws, bolt the two scales together and finish the front edge radiuses (radii?)
The small holes should now guide me in drilling for the 1/4" corbys.
Then just glue, clamp, and screw (the corbys in, that is)

Sound like a plan?
 
What I do is:

1. (Most important.) I square a piece of wood. This means the opposite faces are paralell, and each face is 90 to the next. If you don't get this one, you don't get good results. IMO, a top drawer tablesaw is imperative, but a jointer is pretty dang nice to have also.

2. Split the block into scales.

3. Tape scales together, then tape knife to scales, then drill through blade and both scales.

4. Scribe outline of knife while pinned to scales, and cut to shape while pinned together.

5. Finish front edge with scales pinned together.

By the way, your knife there is spectacular. I really like it.

For a pictural tutorial, check here:

http://www.bladeforums.com/forums/showthread.php?t=643123&highlight=tutorial
 
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