Glide fork cups?

[Robert Luland]

Is there a way to tell 49-59 glide neck cups from 60 and up. I mean is there a physical difference that can be measured so I know what I'm holding in hand. I know the race out diameter is smaller but I don’t feel like yanking it out. Thanks, Bob

[Chris Haynes]

The race size it the same. The later cups are actually longer. If you try using later cups on an early Glide the fork stem will not be long enough.

[Robert Luland]

Thanks anyway Chris but you didn't come close to answering the queation.

[Rubone]

Bob,
Comparing two in my hand, one known early and one late I cannot determine a physical characteristic that would make identification easy. Putting a dial caliper on them I come up with the same sizes overall. I believe the assembled height difference Chris is talking about is the bearing cup and cone combo, not the overall length of the head cup. Sorry I didn't find an easy method.
Robbie

[Chris Haynes]

Thanks anyway Chris but you didn't come close to answering the queation.

Does this answer yer queation?

[bmh]

Measure inside the cup where the race gets pressed in, 49-59 race is 1.969" outside diameter and is 3/8" tall. 60 and up race is 1.980" in diameter and27/64" tall. Problem with the later cups with an early fork isn't so much stem length, it is the fact that the fork tins will not fit properly because of the added distance, as you can see in the photo that Chris posted the newer cups stick out of the frame a little farther. A set of 49-59 cups that I have measures .655" out of the frame, I don't have a later set that is not installed but judging from an assembled bike the are about .030-.040" taller as shown.

[Robert Luland]

Well Brian the two set I got sitting on my desk measure .655 but I went out to the shop and measured the ones on my 60 and there .667. Not a major indiffrance. I want to put this to bed but all my OTC internal pullers have feet that are to big to get under the race. Knowing OTC if I screw up the prungs grinding on them I could buy five sets from Blankenship for what the replacment cost of the feet is. Any one got a poor mans way to yank these races out so I can read the number and put this to rest. Chris I wish ya had a way of measuring those cups.

[Chris Haynes]

Simply lay a bead of heli ark weld on the bearing surface of your old races. It will shrink the OD and they will fall out.

[Robert Luland]

Well Chris I got to hand it to you. Five cups, five minutes and they all fell out. That was incredible. Now in one of the photos you see the five cups lined up with a straight edge atop of them. There all the same height wise. Now the catch! Three of them had the L66410 late race and two had the 07196 49 to 59 race. Mark also informed me that the later race is indeed approximately six thousands larger in diameter than it predecessor. This is becoming very quazie. So I’ve decided to get a set of Mr. Blankenship’s cups and mike um up and post the results. Man this is really going to suck if it turns out all five of these cups are the right cups. Bob

[Rubone]

As I posted before, the assembled height of the cups and cones is the difference.
Robbie

[Chris Haynes]

As I posted before, the assembled height of the cups and cones is the difference.
Robbie

Actually, assembled has nothing to do with the height as the race is completely inside the cup.