About this project
Thanks for checking out our project! We are excited to bring you a great DIY frame building product.
The Jiggernaut is an affordable bicycle frame jig that enables anyone to build a high-quality, custom bicycle.
A frame jig is an essential tool for building bike frames. There are some jigs on the market today, but most are designed with the production builder in mind and are well beyond the budget of the average person that just wants get started in bicycle building. We didn’t want this hurdle to stand in the way any longer. We have designed and built a high-quality frame jig that is affordable to anyone wanting to try their hand at frame building.
The Jiggernaut begins life as a half sheet of ¾” thick MDF and is CNC routed into an easily assembled, lightweight jig that can be packed flat for shipping.
Once unpacked, the jig is transformed into a 3D structure using the included fasteners.The jig is highly adjustable and can accommodate most types of frame geometries and tube sizes.
To make building a frame even easier we offer kits that include not only The Jiggernaut, but a tube set and accessories to build a beautiful lugged bicycle with track dropouts or a mountain bike.
The best part is, when building your own bike the possibilities for customization are endless. Want decorative lugs? Carve them up to your heart’s content. Thirsty? Solder on as many water bottle bosses as you want. Looking for the perfect fit? Now you can have it.
We want to make this product a reality for every aspiring frame builder but we can’t do it without you. We hope you choose to support the project and help spread the word that 'Made in America' is back. Thank you!
BTW: for our friends who support us at the $25 level we have a laser cut scale model or a T-shirt of The Jiggernaut. Your choice, to promote the art of frame building.
The default option is for a 26 inch wheelset. If you want a 29er option, please contact us and we'll accommodate your request.
ABSOLUTELY. There has been too much talk of burning which is unfounded. Using usual welding/brazing safety precautions there is a lot of life in each jig. We have now done dozens of joints on our original prototype jig and she is still going strong. Our advice: save money and solder with a friend.
The tubing is 8/5/8 tubing. The sizes of the tubes are DT = 28.6mm x 650mm, TT = 25.4mm x 600mm, ST = 28.6mm x 650mm, HT = 31.8mm x 200mm. Lugs are stamped and angles are ST to DT = 60 deg, ST to TT = 73 deg, HT to TT 73 deg, ST to CS = 63 deg, CS to CS = 7 deg. The ST fits a 27.4mm seat post.
We supply a collection of v-blocks that can accommodate 25.4mm, 28.6mm, and 31.8mm diameter tubing. Other tube sizes are possible by making shims etc. but we would consider this an "advanced" use. These v-blocks are used to mount the Seat Tube, Down Tube and Top Tube. The head tube can be any diameter as its height is adjustable.
Yes. The dropouts are fixtured on a threaded rod using nuts and washers so the position of the dropouts is infinitely adjustable.
The Jiggernaut uses 0.5mm shims to adjust the bottom bracket height. It can accommodate a 68 - 73mm BB in 1mm increments.
Yes. After all, it's made of wood so it can be easily modified to your hear's content.
Check out this video first:
The Jiggernaut is made from MDF which is wood so if you point a torch at it it can char or even burn. However using MDF as a welding jig is a time tested method and is a common welding practice in many industries. Our Jig is designed with the tubes held off the back plate far enough to braze the joint with only cosmetic charring (in our experience) and the standoffs can usually be place toward the center of the tube, away from the joint taking the heat.
Like most things in the frame building world, there are many ways to skin a cat. One method of construction that we've learned is to use the frame jig to align all of the tubes, tack them in the jig and then pull everything out of the jig and finish welding, brazing or soldering out of the jig. In that scenario, the jig does its duty of alignment without needing to take as much heat.
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