Part Number:F688ZZ Single row flanged deep groove ball bearing - Shielded(Metric Series Ball Bearing) F688ZZ Flanged Ball Bearing,is made of Chrome Steel, the bearing is metal shielded from both sides. It has an 8mm inner diameter, a 16mm outer diameter, a 5mm thickness, and an 18mm flange. Ball bearings of this size are nice and ideal for very precision work and applications that require a lot of functional mechanical parts, such as mechanical devices, electrical instruments, toys, doors, and windows etc. 1.Can be made in Stainless Steel. 2.ABEC Grades 1, 3, 5, 7 are available. 3.Two metal shields (ZZ), also workable with a single metal shield (Z),that is F688Z. Specification Bearing Type: F688ZZ Shielded Bore Dia (d): 8.000 mm Outer Dia (D): 16.000 mm Width (B): 5.000mm For Shaft Diameter: 8 mm Outer Dia (D): 16mm Outer Dia Tolerance: -0.008mm to 0 Width (B): 5mm Flange OD: 18mm Flange Thickness: 1.1mm Ring Material: 52100 Chrome steel Ball Material: 52100 Chrome steel Cage Material: 300 Series Stainless Steel Shield Material: 300 Series Stainless Steel Dynamic Load Rating (Cr): 1064N Static Load Rating (Cor): 474N Max Speed (Grease): 36000 Max Speed (Oil): 43000 Temperature Range: -30掳 to 110 掳C ABEC Rating: ABEC-1 Radial Clearance Trade No.: C0 Radial Clearance: 0.002mm to 0.013mm Ball Qty: 10 Ball Dia: 2.0000mm Weight (grams): 4.51 Features Item: F688 ZZ Flanged Ball Bearing Type: Deep Groove Ball Bearing Closures: Metal Shields Ideal for precision work. Quality Assurance 1. Roundness inspection device 2. Vibration testing machine PackingCustomized ​Flanged Bearing website:http://www.dazbearing.com/flanged-bearing/