Brown Products TrenchMaster (F-704 & F-904) - Manual (Page 10)

HOW TO INSTALL THE SELF-LOCKING COLLAR
The Self-Locking Collar originated in 1925. It was designed to facilitate the mounting of
wide inner ring ball bearings by eliminating the need for locknuts, washers, shoulders,
sleeves and adapters. This collar made the wide inner ring ball bearings easiest of all to
install. The inside of the locking collar has a counter-bored recess which is made eccentric
with the bore. The collar and the end of the bearing inner ring with which it engages are
both machined to act as mating cams on the shaft. When the collar is engaged to the
inner ring, it grips the shaft tightly with a positive binding action that increases with use.
No adjustments of any kind are necessary and it is impossible to cramp or overload the
bearing in mounting.
3-4
1. Observe cam design of wide inner
ring and self-locking collar. use the
punch in the unthreaded hole.
2. Mate cam of collar with cam of
bearing inner ring.
3. Pressing collar lightly against inner ring,
turn collar in direction of shaft rotation
until engaged.
4. With drift pin in collar hole, strike in
direction of shaft rotation to lock.
5. Tighten set screw in collar after applying
Locktite Threadlocker #242 to the set
screw threads.