Roller Bearing – FAA-Traceable MS27646-38 (B538DD)

Roller Bearing – MS27646‑38 (B538DD) | FAA‑traceable

High-quality, fully traceable airframe roller bearing to original MIL‑MS specifications.

New MS27646‑38 B538DD roller bearing. Fully traceable to manufacturer, MIL‑MS standard, ideal for aerospace applications including Bonanza/Baron parts.

• Brand‑new, fully traceable to original MS27646‑38 specification
• MIL‑MS standard B538DD extra‑light duty radial ball bearing
• Single‑row precision design with PTFE contact seals for longevity
• Cadmium‑plated exposed surfaces per QQ‑P‑416 Type 1 Class 2
• Pre‑lubricated with military‑grade grease (MIL‑G‑81322)
• Compatible with aerospace and precision mechanical systems

Detailed Product Description

The MS27646‑38 bearing (also known as B538DD) is a military‑standard extra‑light duty airframe roller bearing, engineered for radial loads in aerospace assemblies. Fully traceable to the original manufacturer, this bearing meets MS27646 specification. Featuring a single‑row design with PTFE contact seals, it provides contamination resistance and extended life.

Exposed surfaces are cadmium‑plated per federal spec QQ‑P‑416 Type 1, Class 2, enhancing corrosion resistance. It is filled with 80 % grease per MIL‑G‑81322 for dependable lubrication over time.

Ideal for aerospace installations and replacement in South Seas Ventures applications, this bearing is commonly used across various torque tubes, control linkages, and rollers in certified aircraft systems.

Technical Specifications

• Part Number: MS27646‑38 (B538DD)
• Type: Extra‑light duty single‑row radial ball bearing
• Bore Diameter: 0.6243–0.6257 in (≈5/8 in)
• Overall Diameter: 1.0615–1.0625 in
• Inner Ring Width: 0.2760–0.2810 in
• Outer Ring Width: 0.2450–0.2500 in
• Seals: 2 PTFE contact seals
• Surface Treatment: Cadmium plating (QQ‑P‑416 Type 1, Class 2)
• Lubrication: Pre‑lubricated with MIL‑G‑81322 grease
• Load Direction: Radial
• Weight: ≈ 0.055 lb