[b0w_bender]

OK my bow press has become my archery Swiss army knife. It was a draw board and bow press in one and now I've added a string jig too. Basically what I did was create an insert that slips into the end of the press. This insert has an integrated spring to keep the fibers taught as the serving is applied. I have a set screw that holds it in a static position when I do the initial fiber wrap. I then tie it off and use the bow press crank to add the desired amount of tension to the string as I apply the servings. It is really rather handy to be able to loosen and tighten the string tension as you work on it. Enjoy!

Stay tuned I've also modified the bobbin to make it easier to apply the serving I'll start a new thread for that. (I'm still working out the details)

 

[kc hay seed]

lets see some more deail pictures of your press.i have a jack like that and am trying to make a press.thanks

 

[b0w_bender]

Sorry, probably should have referenced the original press thread in the initial post.
http://www.archerytalk.com/vb/showthread.php?t=1321214

That thread shows all the iterations I went through to get to the final press design.

 

[Tunaboy]

Hey BB any chance you can hook up a lawnmower or beer dispencer?

 

[b0w_bender]

beer dispenser, hmmm, hey not a bad Idea, I'll have to think on that one for a while.
:icon_1_lol:

:darkbeer:

 

[Razorbak]

pretty sweet set up

 

[Hammer0419]

Very neat setup.

 

[b0w_bender]

Hi guys thought I would share my latest string Jig modification
I've modified the single post jig seen in the videos to be a dual post. I used the original Jack insert and cut the foot off of it. I then cut a slot in it and mounted the spring from the single post insert into it. Now I have the same spring tensioning system only with the dual post setup.

 

[drmajor]

What size is this square tube?
What type and poundage is the spring?
Who makes the spindles or is there a DIY version?

 

[b0w_bender]

The tube is the portion of steel that came with the Jack, I believe it is 1.5"
Spring came from McMaster Car here is the link

http://www.mcmaster.com/#9573k72/=b8k4vv

I bought the spindles from someone on Ebay but a bunch of people on here will make them for you if you ask.

 

[CandianQuest]

What type of rail/guild did you use for the back 2 posts, and would a metal/welding supplier have some?

 

[b0w_bender]

Honestly I don't know much about the posts since I purchased them from Ebay.

 

[CandianQuest]

Honestly I don't know much about the posts since I purchased them from Ebay.

sorry i was a bit unclear, I mean the metal track they are bolted to, the metal channel, what did you use for that.

 

[CandianQuest]

I retract my statement, it is just an open seam channel I can buy that at nearly any metal supplier...

 

[dwagoner]

The tube is the portion of steel that came with the Jack, I believe it is 1.5"
Spring came from McMaster Car here is the link

http://www.mcmaster.com/#9573k72/=b8k4vv

I bought the spindles from someone on Ebay but a bunch of people on here will make them for you if you ask.

your only using a 176lb spring???? you should check some of these out, .3 inches of travel and its to 350lbs max load

http://www.mcmaster.com/#orders/=b95cft

 

[b0w_bender]

your only using a 176lb spring???? you should check some of these out, .3 inches of travel and its to 350lbs max load

http://www.mcmaster.com/#orders/=b95cft

that is 175 per inch of compression so an inch and 3/4 should equate to 300 lbs correct?

 

[b0w_bender]

I retract my statement, it is just an open seam channel I can buy that at nearly any metal supplier...

In this case it is the tube that came with the Jack but I will be upgrading it. It is a bit too thin.

 

[dwagoner]

that is 175 per inch of compression so an inch and 3/4 should equate to 300 lbs correct?

no that 176 is max load and its at 25% no way you can compress that 1.25" spring down 3/4".

 

[mbw]

no that 176 is max load and its at 25% no way you can compress that 1.25" spring down 3/4".

That spring is 4" long that bow_bender is using...its rated deflection at load is 25%(1") of its relaxed length of 4". So it would equal 176lbs/inch of compression. I wouldn't think it would have a problem reaching 300lbs.

 

[b0w_bender]

That spring is 4" long that bow_bender is using...its rated deflection at load is 25%(1") of its relaxed length of 4". So it would equal 176lbs/inch of compression. I wouldn't think it would have a problem reaching 300lbs.

Well I'm not an engineer but that's what I was thinking. Had me scared there for a second that perhaps I was on the wrong track. thanks for the input.

I have a 500 pound scale on it's way we will no shortly for sure.