Hign-concerned Chemical : None Surface Roughness : Ra 0.05 Torque Capacity : Ball Bearing Structure : Deep Groove Ball Model Number : 6806-2RS 30*42*7 mm Coatings : Antirust Oil Material : 52100 Chrome Steel Brand Name : FUSHI Origin : Mainland China Certification : RoHS WHAT IS A THIN SECTION BEARING? Thin Section Ball Bearings were developed for applications where space limitations are of the utmost importance. As the name implies, the difference between the inside and outside diameters of the rings has been minimized or thinned out. Of course this comes at a price by compromising load capacities. However, these bearings can still accommodate a relatively light radial thrust or combined loads. 6800 Series - Metric dimensional series for limited space applications and light loads TECH DEATAILS Item: 6806 2RS Structure: Thin Section Ball Bearing Material: 52100 Chrome Steel Type: Rubber Sealed ( RS ) Bore Dia (d): 30 mm Outer Dia (D): 42 mm Width (B): 7 mm Clearance: C0 Grades: ABEC-1 Lubrication: With Grease Quantity: 1 Lot = 10 PCS This Bearing Structure