Airframe Control Bearings
Airframe Control Overview
IBSCO supplies high-performance airframe control bearings engineered for aerospace, military, and rotorcraft applications where reliability and precision are critical.
Designed to manage extreme loads, misalignment issues, and environmental stresses, these bearings ensure smooth, dependable motion in control systems such as ailerons, rudders, elevators, flap actuators, landing gear, and rotor assemblies.
Key Advantages
- High load capacity for demanding operating conditions
- Low friction for precise motion control
- Resistance to shock, vibration, and harsh environments
- Extended service life in mission-critical systems
OEM Partnerships
IBSCO partners with leading OEMs approved for commercial and military aircraft applications.
Supplier of aerospace-grade ball and roller bearings.
(Smith Bearings) – Precision needle roller bearings for aerospace and industrial applications.
Produces control bearings for flight control systems, drive systems, stabilizers, flaps, slats, and spoilers.
(MinebeaMitsumi Group) – Manufacturer of miniature, instrument, and aerospace bearings. IBSCO is a certified relubrication facility for NMB products.
(New Hampshire Ball Bearings) – Major supplier of airframe control ball bearings, rod ends, spherical bearings, and journal bearings for fixed- and rotary-wing platforms. IBSCO is a certified relubrication facility for NHBB products.
Major supplier of airframe control ball bearings, rod ends, spherical bearings, and journal bearings for fixed- and rotary-wing platforms. IBSCO is a certified relubrication facility for NHBB products.
Super precision ball and cylindrical roller bearings for specialized aerospace systems. - Timken Aurora Bearing Company – Qualified spherical bearings, rod ends, and bushings. - Timken GGB – Plain bearing solutions with polymer coatings, engineered plastics, composites, and bimetals.
What Are Airframe Control Bearings?
Airframe control bearings are precision components used in movable flight control systems of fixed-wing and rotary-wing aircraft. They support oscillating, pivoting, and limited rotation in linkages, actuators, bell cranks, flap assemblies, and stabilizers while tolerating extreme loads, vibration, and environmental exposure.
Design Purpose
- Manage repetitive oscillatory motion
- Minimize backlash in control systems
- Provide high misalignment capability
- Operate in extreme environments (temperature, fluids, G-loads)
- Ensure predictable torque behavior and low friction over the service life
Construction & Bearing Types
Airframe Control Ball Bearings
Single row, double row, and self-aligning types; Fairlead, pulley, and ball bearing track roller styles.
Airframe Control Needle Track Rollers
Single or double roller paths; Cylindrical or crowned OD, with self-aligning options; Stud and yoke styles for flap-tracks, doors, canopies, landing gear, and cam-driven equipment.
Spherical Bearings
Swaged, load slot, split ball, and high-misalignment designs (up to ±15°); Bonded PTFE liners (maintenance-free), machinable liners, or metal-to-metal options.
Journal Bearings (Sleeve Bearings)
Straight and flanged bushings for airframe, helicopter, and landing gear systems; Available in multiple alloys and materials per SAE, NAS, and AIA standards.
Spherical Rod End Bearings
Spherical bearing integrated into a threaded housing; High misalignment, high temperature, and lightweight series available; Common in push-pull rod assemblies, landing gear actuators, and flap linkages.
Ball Bearing Rod Ends
Double row, self-aligning ball bearings with integral shafts; Designed for low torque, high load, and misalignment requirements.
Specifications & Standards
IBSCO supplies airframe control bearings qualified to SAE-AS (MS), NAS, and OEM-specific part numbers, supporting both new production and MRO supply chains.
| Specification | Product Type | Government Designation (Series) |
|---|---|---|
| SAE-AS7949 | Airframe Control Ball Bearings | MS21428, MS21443, MS27640, MS26761, MS27642, MS27643, MS27644, MS27645, MS27646, MS27647, MS27648, MS27649 |
| SAE-AS39901 | Airframe Control Needle Bearings | MS21438, MS21439, MS21440, MS21441, MS21442, MS21447, MS24461, MS24462, MS24463, MS24464 |
| SAE-AS6039 | Airframe Control Ball Bearing Rod Ends | MS21150, MS21151, MS21152, MS21153 |
| SAE-AS81934 | Journal Bearings | M81934/1, M81934/2 |
| SAE-AS81935 | Spherical Rod End Bearings | M81935/1 through M81935/9 |
| SAE-AS81820 | Spherical Bearings | MS14101, MS14102, MS14103, MS14104, M81820/1 through M81820/4 |
| SAE-AS81936 | Spherical Bearings (Copper-Beryllium Ball) | M81936/1, M81936/2 |
Applications
| Application Area | Examples | Bearing Types |
|---|---|---|
| Primary Flight Controls | Elevators, rudders, ailerons | PTFE-lined spherical bearings |
| Rotorcraft Systems | Pitch links, swashplates, stabilizers | High-misalignment spherical bearings |
| Landing Gear Mechanisms | Retract actuators, struts, drag braces | Rod ends, journal bearings |
| Flap & Slat Systems | Hinges, tracks, sliders | Track rollers, double-row bearings |
| Weapon Bay Actuation | Doors, dampers, suspension links | Metal-to-metal & high-temp designs |
IBSCO Value-Added Services
- Class 6 certified cleanroom
- Precision relubrication with tolerance ±0.3 mg
- Vacuum impregnation for cage stabilization
- Assembly-ready delivery
- Custom component configuration
- MRO/OEM special packaging with MIL-SPEC labeling
- JIT fulfillment, LTAs, and multi-year stocking
- Cage code traceability with full certification
- Kit packaging & data packet inspection
Certifications & Compliance
Certified
Certified
Certified
Certified
Certified
FAQs
What industries and platforms use IBSCO’s airframe control bearings?
They are qualified for use in commercial jets, military aircraft, rotorcraft, UAVs, and specialized aerospace systems.
Can IBSCO provide traceability and certifications with each order?
Do you support both OEM production and MRO requirements?
What value-added services does IBSCO provide beyond distribution?
We offer custom cleanroom relubrication, custom packaging, component upgrades, and direct-to-line kitting to streamline aerospace manufacturing and repair operations.
Can I request custom configurations or materials?
Yes — IBSCO works with OEMs to provide special coatings, liners, lubrication, or high-misalignment designs for unique applications.