Bottom bracket tower

[Undies]

I need to make a bottom bracket tower for a new cast iron surface plate I have just bought.
Does anyone have any drawings/advice or know where I can buy one from

Cheers Anders
Crucial Custom Cycles

[Andrew R Stewart]

IMG_0717.jpgBB Post 1991.pdf

Both Brignelli and Alex Meade make BB whipping posts. The tooling I have from both are good and do their jobs so I recommend either.

Posts are real simple. Usually round and lathe turned from solid shaft. Each end has a threaded hole for the securing onto the flat surface and holding the BB shell tight. Add the shell's top face cap/washer and a couple of bolts and you're done.

When I had mine made for me I asked that the post be case hardened then the ends ground flat/parallel. I had a retired machinist who still did odd jobs do mine. For me the critical dimensions were the clearances between the chain stay and the post's top, hence the beveled top edge. I also wanted a post that had a wide base.

Attached is the plans I gave the machinist, The actual post ended up with slight design aspect changes based on his suggestions. In 1991 it cost me about $250 and every time I use it I am so glad it is as big and sturdy as it is. What I didn't have done is a sleeve that slips into the shell and over the top bolt. In the years I've used my post without a sleeve I never found a lacking in function or results. Attached is also a photo of the post in action. Andy

[cicli polito]

Hi Anders, I sent you an email regarding a bb post. I have made several over the years and can knock one out for you, if you are still looking.

[false_aesthetic]

Dan,

I'd be interested in finding out some details if you're game.

[cicli polito]

Hi Tom sure I’ll drop you an email.

[cicli polito]

Hey Tom - sent an email to your ride-elysian address and it bounced back. What’s a good email for you? Or hit me up at ciclipolito (circle a) gee mail and i’ll give you the details on the post.