Author Topic: How many clamps? (Read 1812 times)

Appalachian Hillbilly · « **on:** December 11, 2021, 11:44:10 AM »

Almost ready to glue up a 17" riser. I have to go get c clamps because all my clamps have plastic and I am afraid they will not last in the curing chamber.
How many clamps are needed for sufficient pressure?

3 piece riser...

Pat B · « **Reply #1 on:** December 11, 2021, 12:24:42 PM »

I've never built a riser but I think adding pressure strips(metal or wood), top and bottom should eliminate too many clamps but what do I know.

Crooked Stic · « **Reply #2 on:** December 11, 2021, 12:28:14 PM »

If it is straight cut pieces 3To 5 clamps
One in center and each end. And if ya want piece of mind one between the others. About the same on curves just need no gaps.

Bvas · « **Reply #3 on:** December 11, 2021, 12:36:02 PM »

I would say at least five. Three to press the pieces together and two for blocks to keep the pieces from sliding side to side.

Mark R · « **Reply #4 on:** December 11, 2021, 12:37:39 PM »

I do what Bvas stated

Shredd · « **Reply #5 on:** December 11, 2021, 12:43:32 PM »

If you are gonna buy 3 clamps, you better buy 30...

mmattockx · « **Reply #6 on:** December 11, 2021, 01:20:22 PM »

Quote from: Shredd on December 11, 2021, 12:43:32 PM

If you are gonna buy 3 clamps, you better buy 30...

+1. There is no such thing as too many clamps. I agree with Bvas's estimate for a riser, 5 should work OK if set up properly.

This is my last bow glued up on the form, with 2"x1/8" aluminum pressure strips. Roy uses a similar number of clamps on his trilam bows:

Mark

Jeff Freeman · « **Reply #7 on:** December 11, 2021, 03:44:31 PM »

Riser being glued up behind the tip,in the bench vise with clamps. Don't tighten to much. JF

Buemaker · « **Reply #8 on:** December 11, 2021, 03:54:01 PM »

Can never have too many.

Flem · « **Reply #9 on:** December 11, 2021, 05:44:55 PM »

Appalachian Hillbilly · « **Reply #10 on:** December 11, 2021, 10:07:13 PM »

Flem that is cool!

I have a design that needs to be done in 2 stages. Does the first round have to be heat cured or can it be heat cured all at once .

Also, if it has air cured for 24 hours, can it be heat cured without the clamps?

Jeff Freeman · « **Reply #11 on:** December 12, 2021, 09:16:57 AM »

I use smooth on, for my riser layups. No heat cure. Never had an issue. JF

Appalachian Hillbilly · « **Reply #12 on:** December 12, 2021, 09:37:16 AM »

Jeff, how long do you leave them clamped?

Jeff Freeman · « **Reply #13 on:** December 12, 2021, 10:18:20 AM »

12-24 hours pending on room temperature. Until the glue is hard. JF

Mad Max · « **Reply #14 on:** December 12, 2021, 12:47:55 PM »

I would buy Bar clamps, 12" would be good.
You can't have to many

Appalachian Hillbilly · « **Reply #15 on:** December 12, 2021, 08:04:39 PM »

I found some heat...don't tell the wife.

Jeff Freeman · « **Reply #16 on:** December 12, 2021, 08:16:28 PM »

That'll work. Catch the drips or your busted. 😲 JF

Appalachian Hillbilly · « **Reply #17 on:** December 12, 2021, 08:27:27 PM »

It had setup somewhat.

Jeff Freeman · « **Reply #18 on:** December 12, 2021, 08:34:13 PM »

You will be working on it tomorrow 👍

Flem · « **Reply #19 on:** December 12, 2021, 08:36:31 PM »

1hr cook time

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Author Topic: How many clamps? (Read 1812 times)

Shredd

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