rebuilding an old 1" headset
Posted: Sat Apr 12, 2008 7:42 pm
Ok, in the process of rebuilding my commuter, I am weighing up various parts & pieces that I want to transfer between my two 80s era 10/12 speed road frames.
My preferred headset came out off the MBK; It's a branded Shimano, unlike many other verge freebies I've found & dismantled. Whilst it's not a sealed bearing unit, it has a serviceable grommet/seal ring that sits around the crown race and makes for a relatively, clean & neat unit. The thing is... in my over zealousness in dismantling this headset I crushed one of the bearing cages slightly, and instantly lost most of the ball bearings themselves. No big deal I thought - I should be able to get a replacement from one my LBS.
I've been to two Shops this afternoon with no luck - like the cheapo headset I pulled out of the Ricardo frame I am now building up (and was wanting to use the MBK/Shimano HS on) all the two stores had in stock were the caged bearings were about 0.5 - 1mm greater in diameter and too big to fit in the MBK's Shimano cups.
The nicer Shimano unit has the same inner crown race diameter and outer cup diameter to mount in the headtube as that pulled off the Ricardo - but it seems the bearing seat diameter is slightly smaller between the cups & the races
Should I be having this trouble getting the right replacement bearing?
Should I just kiss the nice Shimano headset goodbye and resign myself to a cheapie complete replacement unit ?
Kymbo
My preferred headset came out off the MBK; It's a branded Shimano, unlike many other verge freebies I've found & dismantled. Whilst it's not a sealed bearing unit, it has a serviceable grommet/seal ring that sits around the crown race and makes for a relatively, clean & neat unit. The thing is... in my over zealousness in dismantling this headset I crushed one of the bearing cages slightly, and instantly lost most of the ball bearings themselves. No big deal I thought - I should be able to get a replacement from one my LBS.
I've been to two Shops this afternoon with no luck - like the cheapo headset I pulled out of the Ricardo frame I am now building up (and was wanting to use the MBK/Shimano HS on) all the two stores had in stock were the caged bearings were about 0.5 - 1mm greater in diameter and too big to fit in the MBK's Shimano cups.
The nicer Shimano unit has the same inner crown race diameter and outer cup diameter to mount in the headtube as that pulled off the Ricardo - but it seems the bearing seat diameter is slightly smaller between the cups & the races
Should I be having this trouble getting the right replacement bearing?
Should I just kiss the nice Shimano headset goodbye and resign myself to a cheapie complete replacement unit ?
Kymbo