"sku":"6217-ZZ SKF"
is simply positioned over the relevant part of the shaft and provides a smooth counterface that is optimized for radial shaft seals
"name":"L100X5/8\" COUPLING HALF"
: 55mm Bore Tolerance: +0/-
"sku":"L150x1 7/16"
6304-ZZ SKF Shielded Radial Ball Bearing (0126) 6300 Series Radial Ball Bearings "sku":"6217-ZZ SKF"Item: Radial Ball Bearing, Bearing Type: Double Shield, Bore Dia.: 20mm, Bore Tolerance: +0 0. 01mm, Outside Dia.: 52mm, Outside Dia. Tolerance: +0 0. 013mm, Width: 15mm, ABEC Tolerance: 1, Dynamic Load Capacity: 3,580 lb., Static Load Capacity: 1,780 lb., Max. RPM: 17,000, Temp. Range: 40 Degrees to 350 Degrees F., Bearing Material: 52100 Chrome Steel, Cage Material: Pressed Steel, Shield Material: Steel, Lubrication: EM Grease, Industry Number: 6304