PSI Aerospace Bearings
Slotted-Entry Design
The unique two piece design
of the slotted-entry bearing features a ball (inner ring) which has a
spherical race to accommodate misalignment. The outer ring/rod end has
an entry window to allow insertion or removal of the ball. This design
feature allows the ball to be fitted to the outer member after all
manufacturing operations are completed. This yields a higher strength
outer race than formed designs, and provides easy replacement of the
ball without removing the entire assembly from the aircraft.
Fast,
Easy Assembly of Slotted-Entry Bearings…
- Ball and outer race prior to assembly
- Ball is inserted into slotted-entry
- Ball
shown partially rotated in race
- Final
assembly with ball fully indexed in race to operating position
Why
Are They Used?
- Designers incorporate slotted-entry
designs because of
-Reduced weight -of the bearing plus related hardware and
structure
-Smaller size -thus, reduced spaced and structural requirements
-Design flexibility -materials, configurations, lubricants
- Users prefer slotted-entry because
they
-Reduce maintenance part cost
-Reduce service turn around time -"on wing" replacement
-higher reliability
-only original installation into structure
- Landing Gears
-High impact loads, severe environmental exposure and compact
designs need can be met with the configuration, material and
lubrication system flexibility offered by slotted-entry bearings
-main and nose gear, struts, braces, etc.
- Flight control systems
-Desire for minimum space and weight, coupled with high loads,
make slotted-entry the choice for many spoilers, flaps, and slats
- Engines and Power Plants
-High temperature often yields
slotted-entry as the logical economical choice for engine mounts, reverses,
actuators, links and supports
What
is available?
- From the Catalog
-Slotted-entry annuals series including chamfered, pre-swaged,
narrow, sealed utilizing stellite ball with stainless steel outer
race ranging from ¼" to 2" bore size
-Rod end slotted-entry series cover male and female (balance
design), from 3/16" to 1" bore sizes
- As Modifications and Specials
Size - bore sizes up to 8" are
manufactured regularly
Material - ball materials include BeCu, AL/Ni/br, stellite, A-286
and Inconel 718 races and rod ends -stainless steel (17-4, 15-5,
13-8Mo), AM355, A-286 and Inconel 718
Configuration -wide ranges of sizes and shapes to reduce cost
and simplify installation
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