P/N: MS27646-38, B538DD

Roller Bearing

Ideal for Aerospace Applications Including Bonanza and Baron
This bearing is commonly used across various torque tubes, control linkages, and rollers in certified aircraft systems.

• 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

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. 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.

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