Airframe Control Bearings

Airframe control bearings are bearings used in airframe flight control systems such as ailerons, rudders, rotor actuators and others. Due to their precision manufacture and durability, airframe control bearings have also been used in a wide variety of applications outside the aircraft industry, including medical devices, robotics, and materials handling systems – virtually any application requiring a high load capability and oscillatory and/or slow rotation.

Manufactured from different materials such as AISI 52100, AISI 440C, or other premium-quality bearing steels, these bearings  can accommodate heavy radial and/or thrust loads.

The following table shows different airframe bearings series. For other types of bearings please refer to the Automotive & Motion Control Products & Parts included in the OTHER AVIATION & INDUSTRIAL SUPPLIES Category.

Airframe Bearings Series

Airframe Control Bearings

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RBC® BEARINGS KP/KP-A...

The RBC® BEARINGS offers a full line of airframe control ball bearings to the aerospace industry  in both “Standard” and “Precision” series. The prefix “M” in a bearing number indicates that it is of a precision series. Although designed and manufactured under demanding quality control requirements for airborne systems, these bearings have been successfully used in many industrial applications, where oscillatory movement, high loads, or corrosive environments are prevalent.

RBC® BEARINGS airframe control ball bearings conform to SAE-AS7949 (formerly MIL-B-7949) and many major OEM specifications. These bearings are of lightweight design, corrosion-resistant, grease-lubricated, and typically sealed. Airframe control bearing rings and balls are made of hardened bearing alloy, AISI 52100, with all exposed surfaces, except bearing bore, caps and seals, plated for corrosion protection. For improved corrosion protection, RBC® BEARINGS  supplies bearings made of hardened stainless steel alloy, AISI 440C. This alloy may be passivated or plated with cadmium or zinc nickel for enhanced corrosion protection.

The RBC® BEARINGS Airframe Control Ball Bearings are offered in different series. The KP/KP-A and KSP/KSP-A series, presented separately, are briefly discussed below.

KP (Heavy Duty) and KP-A (Medium Duty) SAE-AS7949 Series radial ball bearings  manufactured with Plyoseals. KP heavy duty single row sealed bearings comply with MS27640 specifications while KP-A medium duty single row ball deep groove sealed bearings with MS27641 specifications. Both KP and KP-A radial ball bearings are prelubricated for life and feature PTFE seals and CRES sealcaps, cadmium plated exposed surfaces except bore, caps, and seals. Both are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications. Load limit ratings: Radial 1230-lbs, thrust 300-lbs.

KSP/KSP-A Series SAE-AS7949 Series single/double row, self-aligning, light and heavy duty ball bearings with bonded PTFE seals and cadmium plated exposed surfaces except bore, caps, and seals. Like those of KP/KP-A Series, both KSP and KSP-A bearings are prelubricated for life and are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications.

For additional information please refer to the supplied documentation in the respective product presentations.

RBC® BEARINGS KSP/KSP-A...

The RBC® BEARINGS offers a full line of airframe control ball bearings to the aerospace industry  in both “Standard” and “Precision” series. The prefix “M” in a bearing number indicates that it is of a precision series. Although designed and manufactured under demanding quality control requirements for airborne systems, these bearings have been successfully used in many industrial applications, where oscillatory movement, high loads, or corrosive environments are prevalent.

RBC® BEARINGS airframe control ball bearings conform to SAE-AS7949 (formerly MIL-B-7949) and many major OEM specifications. These bearings are of lightweight design, corrosion-resistant, grease-lubricated, and typically sealed. Airframe control bearing rings and balls are made of hardened bearing alloy, AISI 52100, with all exposed surfaces, except bearing bore, caps and seals, plated for corrosion protection. For improved corrosion protection, RBC® BEARINGS  supplies bearings made of hardened stainless steel alloy, AISI 440C. This alloy may be passivated or plated with cadmium or zinc nickel for enhanced corrosion protection.

The RBC® BEARINGS Airframe Control Ball Bearings are offered in different series. The KP/KP-A and KSP/KSP-A series, presented separately, are briefly discussed below.

KP (Heavy Duty) and KP-A (Medium Duty) SAE-AS7949 Series radial ball bearings  manufactured with Plyoseals. KP heavy duty single row sealed bearings comply with MS27640 specifications while KP-A medium duty single row ball deep groove sealed bearings with MS27641 specifications. Both KP and KP-A radial ball bearings are prelubricated for life and feature PTFE seals and CRES sealcaps, cadmium plated exposed surfaces except bore, caps, and seals. Both are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications. Load limit ratings: Radial 1230-lbs, thrust 300-lbs.

KSP/KSP-A Series SAE-AS7949 Series single/double row, self-aligning, light and heavy duty ball bearings with bonded PTFE seals and cadmium plated exposed surfaces except bore, caps, and seals. Like those of KP/KP-A Series, both KSP and KSP-A bearings are prelubricated for life and are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications.

For additional information please refer to the supplied documentation in the respective product presentations.

RBC MS27646 SAE-AS7949...

RBC SAE-AS7949 MS27646 B500DD Series Airframe Control Extra Light Torque Tube Ball Bearings are single row, self-aligning, extra light duty ball bearings with PTFE seals and cadmium plated exposed surfaces except bore, caps, and seals. This series is dimensionally interchangeable with the unsealed B500 series. MS27646 B500DD Series bearings are prelubricated for life and are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications. Please refer to the attached reference chart.

AS27643/MS27643 Series...

The MS27643/AS27643 series airframe control bearings are offered by various manufacturers. They are  double row, ball, self-aligning, heavy duty bearings produced in accordance with AS7949 specification.

Depending on the manufacturer, rings and balls of these bearings are produced from premium quality AISI 52100 chrome steel or CRES 440C materials.  External surfaces (except bore, caps, and seals) are cadmium plated per AMS-QQ-P-416 or zinc nickel plated per OEM specifications. They include PTFE seals, CRES sealcaps and they are prelubricated. They are offered in different sizes but custom sizes, materials, tolerances, radial internal clearances, lubrication, plating, etc., can also be offered upon request.

Operating temperature range: -65 to +250 °F.

RBC® BEARINGS MKP/MKP-A...

The RBC® BEARINGS offers a full line of airframe control ball bearings to the aerospace industry  in both “Standard” and “Precision” series. The prefix “M” in a bearing number indicates that it is of a precision series. Although designed and manufactured under demanding quality control requirements for airborne systems, these bearings have been successfully used in many industrial applications, where oscillatory movement, high loads, or corrosive environments are prevalent.

RBC® BEARINGS airframe control ball bearings conform to SAE-AS7949 (formerly MIL-B-7949) and many major OEM specifications. These bearings are of lightweight design, corrosion-resistant, grease-lubricated, and typically sealed. Airframe control bearing rings and balls are made of hardened bearing alloy, AISI 52100, with all exposed surfaces, except bearing bore, caps and seals, plated for corrosion protection. For improved corrosion protection, RBC® BEARINGS  supplies bearings made of hardened stainless steel alloy, AISI 440C. This alloy may be passivated or plated with cadmium or zinc nickel for enhanced corrosion protection.

The RBC® BEARINGS MKP/MKP-A SAE-AS7949 Precision Series airframe control bearings are single row, heavy duty (MKP) or medium duty (MKP-A) radial ball bearings with PTFE seals and CRES sealcaps. MKP Series bearings conform with MS27640-R specifications while those of MKP-A Series with MS27641-R. External surfaces (except bore, caps, and seals) are cadmium plated. They come prelubricated for life and are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications. For additional information please refer to the supplied documentation.

RBC® BEARINGS MKSP/MKSP-A...

The RBC® BEARINGS offers a full line of airframe control ball bearings to the aerospace industry  in both “Standard” and “Precision” series. The prefix “M” in a bearing number indicates that it is of a precision series. Although designed and manufactured under demanding quality control requirements for airborne systems, these bearings have been successfully used in many industrial applications, where oscillatory movement, high loads, or corrosive environments are prevalent.

RBC® BEARINGS airframe control ball bearings conform to SAE-AS7949 (formerly MIL-B-7949) and many major OEM specifications. These bearings are of lightweight design, corrosion-resistant, grease-lubricated, and typically sealed. Airframe control bearing rings and balls are made of hardened bearing alloy, AISI 52100, with all exposed surfaces, except bearing bore, caps and seals, plated for corrosion protection. For improved corrosion protection, RBC® BEARINGS  supplies bearings made of hardened stainless steel alloy, AISI 440C. This alloy may be passivated or plated with cadmium or zinc nickel for enhanced corrosion protection.

The RBC® BEARINGS MKSP/MKSP-A SAE-AS7949 Precision Series airframe control self aligning bearings are single row, heavy duty (MKSP) or medium duty (MKSP-A) ball bearings with PTFE seals and CRES sealcaps. These bearings are self aligning for 10 Deg. in either direction  except those with part numbers MKSP4A, MKSP5A and MKSP6A which are self aligning for 8 Deg. in either direction. The RBC® BEARINGS MKSP/MKSP-A bearings conform with MS27645-R specifications. External surfaces (except bore, caps, and seals) are cadmium plated. They come prelubricated for life and are also offered with CRES 440C material and/or zinc nickel plating per OEM specifications. For additional information please refer to the supplied documentation.