Seat tube centering cone to build a bicycle frame welding jig/fixture. This is used to hold the top of the seat tube. A seat tube fixture for bicycles will be available soon.
You will need to determine if these will work for your bicycle frame jig build.
Bicycle Frame Jig/Fixture Bottom Bracket Centering Cones:
- Used for your custom bicycle frame jig.
- Zinc plated 1018 cold rolled steel.
- CNC manufactured to precise tolerances.
- Smooth bored for 5/16" or 8mm bolt.
- 1.45" large O.D.
- .625" small O.D.
- Sold as a single cone.
MADE IN THE USA.