Stainless Steel Ball Bearing 1/4" x 3/4" x 9/32" Shielded Miniature SMR52ZZ

Stainless Steel Ball Bearing 1/4" x 3/4" x 9/32" Shielded Miniature SMR52ZZ

This is a stainless steel double-shielded miniature ball bearing measuring 1/4" bore x 3/4" outer diameter x 9/32" width, commonly designated SMR52ZZ. The stainless steel construction provides corrosion resistance compared to standard chrome steel bearings, making this type well-suited for environments where moisture, mild chemicals, or washdown conditions are a factor. Both shield faces are metal (ZZ), keeping lubrication in and contaminants out.

Specifications & What's Included

• Type: Miniature deep groove ball bearing, double shielded (ZZ)
• Material: Stainless steel (races, balls, and shields)
• Inner Diameter (Bore): 1/4" (approx. 6.35 mm)
• Outer Diameter: 3/4" (approx. 19.05 mm)
• Width: 9/32" (approx. 7.14 mm)
• Common designation: SMR52ZZ
• Shield type: Metal shields both sides (ZZ) — pre-lubricated

Applications

Miniature stainless steel ball bearings in this size range are used across a wide range of precision mechanical applications. They are common in small motors, spindles, robotics joints, 3D printer axes and extruder assemblies, RC vehicles, medical and dental instruments, food processing equipment, pumps, and small appliances where corrosion resistance matters. The ZZ double-shield design is the standard choice when the bearing will be pre-greased and installed in a relatively clean environment; the shields retain lubricant and exclude light contamination without adding significant drag. For reliable performance in service, bearings of this type should be kept clean and properly lubricated — dry or contaminated bearings will wear rapidly regardless of material quality.