LumberJocks

Crossbow Curve Gauge

  • Advertise with us
Project by bondogaposis posted 174 days ago 1420 views 14 times favorited 18 comments Add to Favorites Watch

I made this very simple jig for drawing curves. I have been using a spline and Spanish windlass to draw my curves forever, I use them enough that I thought I would make things a little easier and make a dedicated jig. I’m not sure where the idea came from, I saw it somewhere. Very easy to make, it took me about 20 minutes, I think I spent more time looking for the string than anything else. It is very easy to change the shape of the curve by just pulling on the string and setting it in the appropriate notch and also by changing out to a longer or shorter spline can be done as well as the spline is held in place w/ two screws. The spline is 3 ft long and the notches are one inch apart. Thanks for looking.

-- Bondo Gaposis





18 comments so far

View Scott Oldre's profile

Scott Oldre

345 posts in 1937 days


#1 posted 174 days ago

Just what I’ve been looking for!! What type of wood and thickness did you use for the curve part? I have a project coming that needs some curves where this would come in very handy and it obviously takes zero space when you’re not using it.

-- Scott, Irmo SC

View RussellAP's profile

RussellAP

2895 posts in 792 days


#2 posted 174 days ago

Genius! I will make one of these straight off. You wont believe what I’ve been doing, lol. hope I can find a piece that will bend.

-- A positive attitude will take you much further than positive thinking ever will.

View a1Jim's profile

a1Jim

109540 posts in 2083 days


#3 posted 174 days ago

Cool idea Bondo ,thanks for sharing.

-- http://artisticwoodstudio.com Custom furniture

View ShaneA's profile

ShaneA

4972 posts in 1104 days


#4 posted 174 days ago

Looks handy to have. Thanks for sharing.

View bondogaposis's profile

bondogaposis

2239 posts in 857 days


#5 posted 174 days ago

I used quarter sawn white oak for all the parts, just because I have some scraps around right now left over from another project. I don’t think the species is as critical as getting something that is straight grained as possible, so you get a consistent bend in the wood. I started out with the bow being 1/4” thick and that was too thick. Maybe for a longer bow that would work. The bow I have on there right now is 1/8” thick.

-- Bondo Gaposis

View RussellAP's profile

RussellAP

2895 posts in 792 days


#6 posted 174 days ago

I’ve got some maple that might do the trick.

-- A positive attitude will take you much further than positive thinking ever will.

View mafe's profile

mafe

9243 posts in 1595 days


#7 posted 174 days ago

Brilliant idea!
Best thoughts,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Diggerjacks's profile

Diggerjacks

1632 posts in 1644 days


#8 posted 174 days ago

Hello bondogaposis

An ingenius idea
I like it : simple and very effective

Thanks for sharing

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

View SCOTSMAN's profile

SCOTSMAN

5050 posts in 2091 days


#9 posted 174 days ago

I can use this idea for drawing lines until now, I have needed three hands to do it.I can also use it for a crossbow for defending us against the English football hoardes of hooligans who come over the border to Scotland LOL just kidding I love the English never met one I didn’t like,or couldn’t eat . Alistair

-- excuse my typing as I have a form of parkinsons disease

View pintodeluxe's profile

pintodeluxe

3041 posts in 1319 days


#10 posted 174 days ago

I have never had any luck with three point bending sticks. The curve never comes out fair because of the central pressure point. I have resolved to just calling the wife out to the shop to draw the line while I hold the stick.

I built an elaborate jig from Woodsmith magazine with threaded rod and a wooden frame. I think I used it once, then it got hung on the wall as I reverted to my most basic of techniques.

I hope you have better luck with your jig!

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View RussellAP's profile

RussellAP

2895 posts in 792 days


#11 posted 174 days ago

I think I’m going to try this with some half inch aluminum. it’s about 1/16” thick and will bend nicely. Maybe even get a more perfect curve. Also a piece of acrylic will work well too.

-- A positive attitude will take you much further than positive thinking ever will.

View facecarver's profile

facecarver

154 posts in 181 days


#12 posted 174 days ago

Way Cool jig !!!

-- Dennis Stallings; I am what I am,And that's all what I am...

View bobasaurus's profile

bobasaurus

1132 posts in 1690 days


#13 posted 174 days ago

That’s quite clever. I’ll have to save this for a future project.

-- Allen, Colorado

View gfadvm's profile

gfadvm

9589 posts in 1196 days


#14 posted 174 days ago

I use 1/8” Masonite for my fairing stick but your adjustable crossbow is my next project! Thanks.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View HillbillyShooter's profile

HillbillyShooter

3857 posts in 798 days


#15 posted 174 days ago

Outstanding jig—simple and effective. I really could have used this recently, so this goes on both my favorites and to do list. Thanks for this post.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

showing 1 through 15 of 18 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase