Turner Spherical Roller Flange Cartridge, Concentric Setscrew Lock 3.1/2" 2/SPZ1900 has a top width

2/SPZ1900 has a top width of 24

so a 1632-8M-20 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

so the 2/C285 interchanges with Gates 2/C285

250-S8M-800 has a 8 mm tooth pitch

Is 12/C201 the same as other brands' 12/C201

Turner Spherical Roller Flange Cartridge, Concentric Setscrew Lock 3.1/2" 2/SPZ1900 has a top widthThe Turner SFC 3E is a spherical flange cartridge mounted bearing unit with a bore. It features a SFC series insert with concentric locking in a cast iron housing. Pre lubricated and ready for installation. Product Specifications Housing Style Spherical Flange Cartridge Insert Series SFC Shaft Attachment Concentric Housing Material Cast Iron Bearing Type Spherical Roller Duty Level Heavy Part Number SFC 3E Series Specifications Insert Specifications