Ducati Monster Forum

Moto Board => Tech => Topic started by: TAftonomos on October 15, 2010, 05:17:58 PM

Title: Pressing on tapered steering head bearing...
Post by: TAftonomos on October 15, 2010, 05:17:58 PM
Gotta do this again, last time it was a fiasco/disaster.

The hot plate/frozen stem didn't do the trick, so I need to press it on now.

What do you guys do, make up a tool?  Is there one available to purchase or rent from someone?  I don't mind making one, but I don't have the material handy, so it's going to take a week to get it, find the time to make it, blah blah blah.

I'm assuming you can ONLY press on the inner shell of the bearing, and not put the outer shell on and press the entire thing.!?!
Title: Re: Pressing on tapered steering head bearing...
Post by: ducpainter on October 15, 2010, 05:26:32 PM
Yes, only on the inner race.

I've used the old bearing and a hammer and punch.

Ideally a piece of tubing/pipe the same od as the race od is what you want.
Title: Re: Pressing on tapered steering head bearing...
Post by: 1KDS on October 15, 2010, 07:08:21 PM
+1 I've used an old bearing upside down, and move the force around the circumference after every hit or two
Title: Re: Pressing on tapered steering head bearing...
Post by: brad black on October 16, 2010, 02:57:33 AM
i have the ducati tool for the 916 style, but if i didn't have the tool i'd get a piece of pipe the right id, machine the end to reduce the od at the contact face to the same as the bearing inner so i didn't damage the cage (if you are using the tapered rollers that is, if using the ball things there's no race there) and then if i was really flash with time i'd make a plug for the hitting end to make sure i got a nice go at it.  then reach for the big hammer.

you could put it in the press if you really wanted to i guess.
Title: Re: Pressing on tapered steering head bearing...
Post by: TAftonomos on October 16, 2010, 06:15:37 AM
Off to lowes to see/hope they have the right size of pipe.

Got a whole bunch of goodies yesterday for the Ohlins SBK fork project, can't wait to get them mounted up.
Title: Re: Pressing on tapered steering head bearing...
Post by: Speeddog on October 16, 2010, 09:33:20 AM
I've got an old inner race that's split, and a piece of pipe.
I use a press, as I've got one....but you can hammer it on.

Make *sure* you support the bottom end of the stem when you do it, do not have it sitting on the triple, as you can bend it that way.
Title: Re: Pressing on tapered steering head bearing...
Post by: Raux on October 16, 2010, 11:52:12 AM
a large socket is what i used under the stem
Title: Re: Pressing on tapered steering head bearing...
Post by: Rameses on October 16, 2010, 02:44:58 PM


Yeah, I think I used a socket under my stem when I pressed mine on too.

Title: Re: Pressing on tapered steering head bearing...
Post by: TAftonomos on October 16, 2010, 04:14:08 PM
I found a rear wheel spacer, turned it to fit in the lathe, and then used a large piece of brass pipe to press it on. 

Front end = it's on now :D
Title: Re: Pressing on tapered steering head bearing...
Post by: Raux on October 17, 2010, 01:06:52 AM
Quote from: TAftonomos on October 16, 2010, 04:14:08 PM
I found a rear wheel spacer, turned it to fit in the lathe, and then used a large piece of brass pipe to press it on. 

Front end = it's on now :D

no it's not.  cause there are no pictures
Title: Re: Pressing on tapered steering head bearing...
Post by: TAftonomos on October 18, 2010, 08:06:51 PM
shut.....

I have crappy cell phone pics, will that work?
Title: Re: Pressing on tapered steering head bearing...
Post by: Speeddog on October 18, 2010, 08:10:28 PM
Some cellphone pics are pretty good.
Title: Re: Pressing on tapered steering head bearing...
Post by: junior varsity on October 19, 2010, 07:20:33 AM
Quote from: humorless dp on October 15, 2010, 05:26:32 PM
Yes, only on the inner race.

I've used the old bearing and a hammer and punch.

a piece of tubing/pipe the same od as the race od is what you want.

This is what I do and it works really well. I have two pipes: one for the old skinny stem, and one for the newer style, fatter stem.