ONE-ROW METRIC ISO SERIES
ENGINEERING 10 TIMKEN MINIATURE AND THIN-SECTION BEARINGS CATALOG
BEARING TYPES AND CAGES
ENGINEERING
CATALOG PRODUCT SELECTION
ENGINEERING
SPECIAL PRODUCTS
INTEGRAL ASSEMBLIES
Timken designs and produces specialized integral assemblies. These assemblies utilize precision bearings that are mated with components manufactured to extremely tight tolerances or contain bearing raceways integrated into the shaft and/or housing. By avoiding tolerance stack-ups, integral assemblies provide the ultimate bearing solution for critical applications requiring precise positional control and low radial/axial runout. Integral designs have the added benefits of mounting ease and more value to the user.
X-RAY
This bearing assembly supports the rotating anode in an X-ray- generating vacuum tube. To meet the severe operating conditions of 10-8 TORR vacuum, 752 F - 932 F (400 C - 500 C) and 10,000 RPM, super high-speed steel alloys, such as M62, are required for bearing rings and balls. The integral shaft raceway design offers cost and performance advantages.
DOUBLE-ROW AND SUPER DUPLEX BEARINGS
When two radial ball-bearing raceways are ground wider than standard width inner and outer rings, a double-row ball bearing is created. A double-row bearing has a single piece inner ring and a single piece outer ring for ease of handling. Double-row bearings are normally supplied to an axial play specification or a radial play specification, and also can incorporate special features such as slots, flanges and holes if required. Super duplex bearings are a special version of a double-row bearing, where only one ring has two raceways ground into it. Super duplex bearings are typically manufactured as angular- contact ball bearings, and can be supplied as a DB (back-to-back) or a DF (face-to-face) super duplex assembly. A DB super duplex bearing utilizes a single outer ring with two angular-contact raceways, and two precisely matched inner rings to provide for the desired preload.
Fig. 5. Thrust ball bearing.
PIVOT BALL BEARINGS
Size Range: 0.0600 in. - 0.3750 in. Designed for space-constrained environments where low torque is required, pivot bearings use the mating shaft for the inner raceway. These bearings achieve maximum power density with a full complement of larger balls, no separator or inner ring. Shields are available for the standard line. Typical applications are in guidance systems, such as commercial gyroscopes.
THRUST BALL BEARINGS
Size Range: 0.0937 in. - 0.1250 in. These bearings are designed for applications where there is high- axial loading, low speeds and relatively high-allowable torque. The standard offering has all stainless-steel components for use where inert materials are required. Typical applications include fuel control systems.
Fig. 6. X-ray and integrated bearing assemblies. Fig. 4. Pivot ball bearing.
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