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Crown Race Setting Tool Hacks?

Nick

My name is Nick
Sep 21, 2001
15,133
3,438
behind you, don't wait up.
14" of PVC with the correct id.

The last crown race that I set I just assembled everything, and used extra spacers and pulled everything together using the star nut, top cap and screw.
 

jstuhlman

We noticed.
Dec 3, 2009
9,742
4,510
Cackalacka du Nord
if you don’t have a pvc pipe, maybe open a large crescent wrench around the steerer tube and grently tap/work around with a hammer? also heat and liberal amounts of grease.
 

StiHacka

Compensating for something
if you don’t have a pvc pipe, maybe open a large crescent wrench around the steerer tube and grently tap/work around with a hammer? also heat and liberal amounts of grease.
My advice would be not to fuck with anything steel/iron anywhere near the alloy steerer. The PVC pipe is a good trick. You don't need to cap it / hammer it either - just turn the fork upside down and make gravity and momentum do the work by bouncing it a couple of times.
 

Jm_

Turbo Monkey
Jan 14, 2002
9,428
1,839
AK
4 food drop?

Grease that bitch and use the star-nut/headset to press it on?
 

HardtailHack

used an iron once
Jan 20, 2009
2,355
242
For Cane Creeks I kept an old bearing and used that and a pipe to drive it down.

Don't run them now as their headsets to suit my bike suck.
 

6thElement

Schrodinger's Immigrant
Jul 29, 2008
4,693
2,350
Pushing everything together using the star nut sounds like a good way to shorten your bearing life unless you have an old bearing as @HardtailHack suggested.

Crown race tool ftw here.
 

jonKranked

Press Button, Receive Stupid
Nov 10, 2005
56,715
5,351
media blackout
definitely PVC pipe. make sure the business end is a perpendicular to the length of the pipe otherwise it won't get the race on straight; you'll have to bugger it around some to make sure its flush on the crown
 

HardtailHack

used an iron once
Jan 20, 2009
2,355
242
Why so? It's constant pressure, not hammering/impact. I'd think just riding puts more stress on bearings than slowly squeezing them together during assembly.
It's a M6 screw, in mild steel that can apply over 700lb of force.
You no doubt can do it but it's pretty cruel, a thrust bearing may be rated for such a force but an ACB wouldn't be.
 

Nick

My name is Nick
Sep 21, 2001
15,133
3,438
behind you, don't wait up.
It's a M6 screw, in mild steel that can apply over 700lb of force.
You no doubt can do it but it's pretty cruel, a thrust bearing may be rated for such a force but an ACB wouldn't be.
Ok maybe it could apply that much force but it doesn't have to. It only has to move the bearing onto the bearing seat and overcome the press-fit tolerance.
 

StiHacka

Compensating for something
I found my latest Works Components headset came with a crown races that had a gap in it. I pressed it on with my fingers. Works like a champ!
CC 10 comes with a plastic split crown race. Looks awful but didn't detect any subpar performance from the race alone (the terrible bearings that came with it - that's a different story).
 

Happymtb.fr

Monkey
Feb 9, 2016
885
256
SWE
I have been splitting a few crown race with a hacksaw followed by a meticulous deburring. It has never failed so far