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how-to-build-a-frame-jig-volume Bicycle Frame Building Jig : 10 Steps (with Pictures) - Instructables

Wow — someone has actually read this post and requested drawings! This seems only fair since not everyone can be expected to create an Onshape account to play with the model. But…be warned — these drawings were originally only for my reference while making the jig!

The two files after it are dxf files containing engravings and reference geometry for adjusting seat tube and head tube angles that need to be machined on a CNC how to build a frame jig volume. Every year in the spring, I teach a one-credit co-curricular in which 6 or 7 engineering students learn to build bicycle frames.

We keep it pretty simple — we only work with steel, and students must either fillet braze or capillary braze using lugged construction.

No exotic materials. No TIG welding. Just good old fashioned oxy-acetylene brazing. It seemed like a well-proven design, and I really like the way the bottom bracket pivot floats thanks how to build a frame jig volume a clever dual-curved-slot design that puts the center point of the slot How To Build A Frame Jig Fast arcs at the center of the bottom bracket. Thankfully, I did not have to start entirely from scratch in copying the Arctos design.

The aspect of this project that I am most excited about is that it gave me an excuse to go deep on my new favorite CAD software, Onshape.

Ok, permit me a momentary diversion to highlight just some of the myriad how to build a frame jig volume Onshape is a delight to use. Okay, enough blathering on about Onshape. You can view it without logging in, and it is copyable and exportable for all Onshape users.

The Onshape document includes models for all custom and COTS parts, an assembly, and engineering drawings with dimensions. Aspects of the assembly could probably be improved. Also, the drawings are still fairly rough no tolerances, for examplebut should give you a starting point for fabrication. Stay tuned for Part 2 of this post with more photos of the finished jig, its constituent parts, and how to build a frame jig volume descriptions of how I manufactured each of the custom parts.

Please let me know what you think. I really appreciate this! May I ask you some questions about the jig? So how can you get the frame out of the jig? Thanks for the inquiry. Once the cones and BB plug are out of the way, loosening the rear dummy axle will let you rotate the frame about the bottom bracket. You can then slide it off the bottom bracket axle perpendicular to the plane of the jig.

You will want to tack it on the jig, then do various checks for planarity of the front triangle, symmetry of the rear triangles, etc.

I just do full brazing on a Park stand. In the meantime may I ask you another question? Purely aesthetic — you can leave it out if you like. Thank you for the compliment! You are most welcome to download the plans and build a version for yourself. The links to download the files are in the post after the second paragraph of text.

One question — can we work out the mechanical parts — the critical ones like the two files. Hi, How to build a frame jig volume. Handling performance is pretty sensitive to head tube angle.

The seat tube is less sensitive, but that plate has a slot that a steel dowel pin rides in. I use the facilities and other resources at the college where I teach to make them, and I feel like it would be unethical for me to profit personally from selling one.

Do you have the cad drawings so I can import into Creo? Looks like Onshape is a ptc product. I in CT and want to build a jig and this looks very complete. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Published on: August 6, January 13, Author: amhoov Comments: Head Tube Angle Ticks Download. Seat Tube Angle How To Build A Frame Jig In Ticks Download.

Share this: Share Facebook Twitter Email. Hoover, PhD nice jig. Are you sharing the cad drawings and do they have dimensions? Dear Aaron, many thanks for sharing such niche plans online. Are you satisfied with it? Many thanks for your answers. Best regards from How to build a frame jig volume Matt Loading Matt, Thanks for the inquiry. Good luck! Dear Aaron, many thanks for your answer and tips. Many thanks. Best regards Matt Loading Hello and good day — this is outstanding and just awesome.

Can we dl the plans and work on the frame-builder-jig!? This is just awesome many many thanks for all you did! Thanks for the compliment on the jig.

Cheers, Aaron Loading Hey Aaron, Would you consider selling one of those jigs you made? Kindly, Matan Loading Thanks, Aaron Loading Thank you Loading Leave a Reply Cancel reply Your email address will not be published. Sorry, your blog cannot share posts by email.

Frame jig - Frame jigs run the gamut from $ "it'll do for now" disposable (and flammable!) particle board versions, up to $5, rocket-science precision, aluminum and steel pieces of art (we used to link to Anvil here but Don has retired and they're no longer available), and of course, rock-solid, dependable work horses in - of course Sputnik fits in there somewhere.

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