- Description
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Details
The Bottom Bracket Fixture is used to support the bottom bracket shell of your bicycle frame. It comes with the plates and hardware shown in the first picture and works with 2"x2" tubing only (customer-supplied). Bottom Bracket Cones are sold separately. The 7/16" bolt holes (in the 90-degree brackets) are slotted 3/16" of an inch to allow for fine adjustments if the tubing they mount to it isn't welded perfectly perpendicular to the lower rails of the frame jig.
For cruiser bicycle frames with the bottom bracket high in the frame, you may want to create a Tee from 2"x2" tubing (as shown in the last picture) and mount the fixture brackets to the top of the tee facing the rear dropouts. This will require an additional Base Clamp to support the welded Tee. You can also make a welded "L" from 2"x2" tubing and clamp it to the outside of one frame rail of the jig (with a spacer) like the upright for the seat tube fixture. The fixture brackets can then be mounted to the horizontal part of the "L".
You need to supply the tubing for the fixture.
Download the Chop Source Bicycle Frame Jig Assembly Instructions
The steel plates for the bottom bracket fixture are laser cut from 1/4" plate and are powder coated black.
- Reviews
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