P/N: MS27640-4, KP4

Roller Bearing

MS27640-4 (KP4) airframe ball bearing for aircraft control systems
Upgrade your aircraft’s control systems with the MS27640‑4 (also known as KP4), a single-row, heavy-duty airframe ball bearing engineered for precision and longevity in radial load conditions. Engineered to airframe-grade tolerances, this bearing is pre-lubricated and sealed for life, delivering reliable performance in the most demanding environments.

Key Features:

• Heavy‑Duty Radial Design: Built for high-load aircraft control systems (radial load application).
• Airframe Ball Bearing (KP4 Series): Features PTFE seals and corrosion-resistant cap construction for extended operational life.
• Precision Specs: 0.2500" bore, 0.9014" outer diameter, 0.335" outer ring width, 0.484" inner ring width.
• Sealed & Pre‑lubricated: Ready for installation with sealed contact bearings using MIL-grade lubrication.
• Airframe Ready: Includes cadmium-plated surfaces and heat-treated materials rated up to 250 °F. AFBMA standard tolerance ensures precise fit and durability.

Technical Specifications:

• Bore Diameter: 0.2500 in
• Outer Diameter: 0.9014 in
• Outer Ring Width: 0.335 in
• Inner Ring Width: 0.484 in
• Seals: PTFE, 2 contact seals
• Load Direction: Radial
• Construction: Heat-treated (Rockwell C 60–66), cadmium-plated, internal clearance 0.0004–0.0010 in.