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Category Winner
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I had some photos saved somewhere, but Jeff Jones was doing some creative work years ago to lighten EBB's. He went as far as machining clean through the center portion of the EBB.
Nice job, keep going.

I just installed my PW EBB in my Zion. It has more throw than the stock version, and allows me to get a 32X18 without a half-link..
 

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Someone did extensive machining on a Rig EBB a while back. I searched through about 8 pages with no luck though.
Anyone else remember that?

Fun lathe work there PVD!:thumbsup:
 

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Your contact surfaces between the eBB and shell are smaller, which might reduce the chance of creaking (less rocking from typical shell distortions) - nice job. Did you need to make an Arbor? Could you not had used a 4-jaw chuck?
 

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Discussion Starter · #9 ·
itsdoable said:
Your contact surfaces between the eBB and shell are smaller, which might reduce the chance of creaking...
I'm figuring that since the cam ribs are in about the same width as the bearings of a typical square taper bb, that things will work fine. time will tell. I plan on modifiying the frame to reduce the shell width to match the EBB.

itsdoable said:
]Did you need to make an Arbor? Could you not had used a 4-jaw chuck?
I could have, but i figured that spending a little more time making the arbor will allow me to do this same modification to many ebb's quickly without too much hassle.

here is a pic of the stock rig ebb:



it weighs over 300 grams. a bit more of a challenge to machine down. more mill work. totally lame design.

any pictures of the modified rig ebb people keep talking about?

also: I will be adding to this other page within the next week:
https://www.pvdwiki.com/index.php?title=EBB_Frame_Shell_Modification
 

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ali'i hua
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nice work!

i gess this is the best place to bring this up- so, as many have a creaking EBB issue, what about drilling, tapping, and inseting something like a Zerk fitting to allow grease injection into the EBB's many voids. for clarification, this would obviously work better on a Bushnell style with the lightning holes drilled perpendicular to the axis of the bottom bracket. any oppinions? heck, would a zerk fitting tapped into the frame make more sense?
 

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Retro Grouch
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Apples and Oranges?

shiggy said:
Good luck doing that to the Rig's internal expanding EBB insert.
I like your arbor tool (I mean I really like purposeful tools), but how are you going to use it on a split quill style insert?

Brad
 

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Discussion Starter · #14 ·
aka brad said:
I like your arbor tool...,but how are you going to use it on a split quill style insert?
It will mostly be used to hold the cam on the indexer at the mill. A little bit of lathe work. the milling work that others have done is a bit basic. by using the arbor, i can get pretty fancy.
 
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