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Catalog
ROD ENDS - HIEM JOINTS
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In the selection of a bearing for a given application, many conditions must be considered in addition to bearing
size, speed and capacity. Included among these conditions are the type of load - whether imposed by oscillatory
our rotating motion, very high or very low operating temperatures or a wide range
of operating temperatures, exposure to dirt and dust, and excessive humidity or extremely wet operating
conditions. The success of the applicaton and the life expectancy of the bearing depend on how well provision
has been made to meet the conditions. If it becomes necessary on occasion to use a
full type bearing in rotational service, certain factors must be taken into account. Torque increases sharply as the
moment load increases. In addition, thrust and overturning moment loads promote excessive ball abrasion,
resulting in shorter as well as unpredicatable bearing life. This abrasion occurs because, without a retainer or
separator, the balls are in contact with each other. It is strongly recommended that designers consult the Fafnir
Engineering Department before selecting a full type bearing for rotational service.
(Fafnir Bearing Divsion of Textron Inc., New Britain, CT. 06050) The Fafnir Bearing Company was first to develop
a complete line of ball bearing to meet the exacting requirements of the aircraft industry. Fafnir
bearings have the following characteristics: 1. Dimensioned in inches rather than in metric. 2. Corrosion resistant
- exposed surfaces, as mounted, are cadmium plated or are stainless steel. 3. Most sizes incorporate the Farnir
Plyo-seal illustrated to insure retention of lubricant and exclusion of contaminants and moisture. 4. Bearings are
pre-packed with lubricant conforming to specification MIL-G-81322 (MIL-G-3278). 5. Rings are made of bearing
quality chromium-alloy high carbon steel, except for rod ends and bellcranks. 6. Inner rings extend beyond outer
ring faces to eliminate need for spacers. 7. Most self-aligning sizes permit
bearing misalignment of 10 degrees in either direction. 8. Conform to Government Specifications.
Aurora offers a complete line of standard and spherical bearings with the following characteristics: 1. Body - Low
carbon steel, cadmium or zinc plated at manufacturer’s option, dichromate treated. Number 16 series
standard body is 4130 steel, not heat treated. 2. Race - Low carbon steel, cadmium or zinc plated
(manufacturer’s option), chromate treated. 3 Ball - Alloy steel, heat treated, hard chrome plated. Heim is the
original producer of Unibal self-contained spherical bearing and spherical bearing rod ends. These unique
bearings were developed in the early part of World War II to fulfill a desperate need for reliable plain
self-aligning bearings for aircraft control linkages. Heim has the following characteristics: 1. Outer member is
aircraft steel, cadmium plated. 2. Ball is SAE 52100 Steel, heat treated. 3. Inserts are naval bronze.
4. L in rod end number designated left hand thread. 5. D in rod end number (MD35-14) denotes drilled hole in the
shank. 6. G in suffix indicated lubricator is required (HM-5G) |
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