Jump to content

Headstock Bearings


monty_jon
 Share

Recommended Posts

 

 
 
 
 
 
 

The welding trick if for removing the bearing "cones" from the headstock. If you weld the bottom bearing it will shrink even tighter onto the stem.

I agree with Perce. Break or cut off the cage, then very carefully cut or grind through the bearing inner and stop just shy of hitting the stem. Use a cold chisel to crack the bearing and it will slide off the stem.

The correct way is to use a bearing separator as suggested by Crazybond but you will need extra long bolts to reach the top plate. You could also use the bearing separator and a hydraulic press. But most of use don't have access to those tools.

Chris.

Link to comment
Share on other sites

 

Luckily mine was a not that tight. Id suggest a little heat.

 

If you weld the bottom bearing it will shrink even tighter onto the stem.

 

Heat expands

Edited by faussy
Link to comment
Share on other sites

 

Yes, a little heat (such as a heat gun or propane torch) may work but watch the o-ring/dust seal and don't heat the aluminium stem as it will expand more than the steel bearing.

 

Heat expands

Yes, heat expands. However, I was questioning the idea from Crazybond regarding putting weld on the old bearing. Unless you are really lucky and/or really fast the bearing will shrink even tighter on to the stem. When you run a bead of weld the filler metal is molten (over 1500°C), as is part of the parent metal. This "as cast" metal is now the new original size. It immediately cools and shrinks (even before you complete the bead). That's why it works so well for removing the cones in the steering head but not so for the bearing on the stem.

But do whatever works for you.

Chris.

Link to comment
Share on other sites

 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...