Cook Bros. F-Type Crank Mold

[Betsy]

Thanks for this insight @Caj Remtiw

Yeah.. thanks for the insight!

We was literally telling you if was a forging from Pg1 .. retrobate was blue in the face, I was pulling my hair out.. did we get any recognition?.. oh no.. it’s just “Thanks Caj, we’d be clueless without you Caj.. we’ve only got them useless fks @retrobate and Betsy to rely on and they didn’t even work at Cooks Bros .. Pfft idiots! ..

 

[27motorhead]

Yeah.. thanks for the insight!

We was literally telling you if was a forging from Pg1 .. retrobate was blue in the face, I was pulling my hair out.. did we get any recognition?.. oh no.. it’s just “Thanks Caj, we’d be clueless without you Caj.. we’ve only got them useless fks @retrobate and Betsy to rely on and they didn’t even work at Cooks Bros .. Pfft idiots! ..

Indeed @Betsy you were bang on the money. Wanted @Caj Remtiw input as far as I’m aware he has some association with CBR from BITD.

This process is used for many bike parts as it’s way more efficient than CNC’ng a big block and stronger too boot. Rob Warner did a nice visit to the Hope Factory and they do exactly this. But you know all this already no doubt!

 

[Betsy]

I begrudgingly accept your half arsed apology..

 

[Caj Remtiw]

You guys have to "keep a wrinkle in it" and stuff it back in your shorts!

It is just bicycle parts...Granted rare and expensive bicycle parts, but still just bicycle parts!

 

[27motorhead]

You guys have to "keep a wrinkle in it" and stuff it back in your shorts!

It is just bicycle parts...Granted rare and expensive bicycle parts, but still just bicycle parts!

It's sure good to "geek out" but you 100% still need to keep your sense of humour...

 

[bikeworkshop]

Now there's true Knowledge on the thread, can we understand the full process?

So what's the piece that's placed in the press before forging?
Custom, made on site, or standard pieces delivered in a box from abroad, or cut off a huge lump by an apprentice with a hacksaw?

 

[Betsy]

If you want to understand the full process..

Ask about the cold forging of the square taper.. this needs to be punched in from the back of the crank, hence the machining allowance behind for clean up.

I guess this will be forged before reaming out and threading the opposite side? also, is the square taper forged before the drilling and tapping for the pedal and this becomes the datum for the crank length or is the pedal hole used to set the crank in the cold forging machine?