Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
I had a friend who raced on a Lambert frame in the early 80's, and he was no slouch about bikes. It was a great frame, and he was proud of it. The BB was changed over to something reliable. I don't remember the details, but I'm pretty sure you'll find a standard sealed BB fits the threads just fine.
No doubt someone will tell us more about the frames; most were fillet brazed chrome-moly tubing, but I have also heard of lugged Lambert frames.
The Lambert spindle is not a regular square taper; the Lambert spindle is a little thinner and, as I recall, it doesn't taper at all! You can file a taper into the crank arms, though, and fit them onto a tapered spindle. It'll give you the original look, very much like a TA crank, but not a very stiff one.