Brochure

Mtd. Ball
Bearings
G-244
®
Mounted Ball Bearing Engineering Section
“Slip Fit” Mounting
Mounted Ball Bearings are designed to slip t onto the shaft.
Slip t means that the shaft is usually slightly smaller, and
the inner ring bore is slightly larger than the nominal shaft
sizes listed in the bearing tables. Slip t mounting is very
popular and economical as it does not require specialized
equipment or tooling to mount the bearing on the shaft. Re-
liability of the lock is still dependent on the proper mounting
techniques and proper shaft size control.
Shaft Locking System Selection
Selection of the shaft locking system may be dependent on
some or all of the following application criteria:
• Lock Reliability
• Shaft Run-Out
• Vibrating Systems
• Vibration Reduction (Isolation Devices)
• Shaft Fretting
• Distress On The Shaft Surface
• Shafting Material
• Space On The Shaft
• Shaft Orientation (Vertical, Horizontal)
• Ease Of Installation
Single Sided (Single Lock)
Setscrew Locking System
Single sided setscrew lock has an
extended inner ring on one side of
the bearing. This locking system is
held to the shaft by two setscrews.
Single lock is the most popular bear-
ing mounting method for Mounted
Ball Bearings. It is easy to mount because it requires tighten-
ing only two setscrews and takes up minimal space along
the shaft. Sealmaster and Browning Mounted Ball Bearings
have a unique package of features including: wide inner
ring design, zone hardened inner rings, specially designed
setscrews and 120° setscrew position. These features are un-
matched in the mounted bearing industry and are designed
to maximize lock reliability.
Single lock setscrew design is specied in a wide range of
applications for moderate loads and speeds. This lock is
sometimes specied in ange block and cartridge hous-
ings because of inaccessibility of back side setscrews. Upset
setscrew marks on the shaft can be minimized for removal
of the bearing by removing the setscrews and using a at
punch, tapping the upset shaft material at onto the shaft.
For high speed, heavy load (radial or thrust), vibration, ec-
centric loading, stainless steel or hollow shafting, reduction
of fretting, vibration or marking of the shafting, review
alternate locks below or consult Application Engineering.
Double Sided (Double
Lock) Setscrew Locking
System
Double sided setscrew lock is
extended on both sides of the inner
ring. The inner race is locked to the
shaft by four screws. This design is the preferred lock for
the heavy duty Sealmaster Gold Mounted Ball Bearings with
double lock incorporate the same unique package of lock-
ing features included in the single lock design: wide inner
ring design, zone hardened inner rings, specially designed
setscrews, and 120° setscrew position.
The double lock design is specied for demanding applica-
tions or where shaft lock reliability is critical. This design is
often specied on high load applications, high thrust load
applications, vertical shafts where extra holding power is
required, eccentric drive applications, high vibration applica-
tions, and high speed applications. It also helps to reduce
fretting corrosion on the shaft. Upset setscrew marks on the
shaft can be minimized for removal of the bearing by remov-
ing the setscrews and, using a at punch, tapping the upset
shaft material at onto the shaft. For stainless steel shafting,
or where vibration reduction is required, refer to Skwezloc
®
or BOA Concentric locking collar below or consult Applica-
tion Engineering.
Eccentric Locking
Eccentric locking design incorpo-
rates a precision eccentric collar that
mates with the inner ring extension
for shaft hold. The inner ring is ex-
tended and has an eccentric prole
machined on the outer diameter
at the end. The inner diameter of
the collar has an eccentric prole machined that mates with
the inner ring extension. The eccentric collar is placed on
the inner ring extension and rotated in the direction of shaft
rotation. This rotation forces the collar and inner ring ec-
centric proles to lock by creating a friction grip. The collar
makes contact with the shaft and a setscrew on the collar
is then tightened to lock the collar in place. This design is
available on Browning Mounted Ball Bearings only.
Note: The eccentric is designed for single direction of rota-
tion and should not be used when two direction rotation is
present.
Lock Types