YB12-3/8 Steel Spur Gear 145TC Bost-Bronz® has a self-contained oil

Bost-Bronz® has a self-contained oil supply (approximately 20% by volume) which provides a uniform protective film over the entire bearing surface

Torque Rating: Not Rated in lb

and attachment bolts

the CUCSHA has a Hard Chrome bearing insert and a Stainless Steel housing

" In other words

YB12-3/8 Steel Spur Gear 145TC Bost-Bronz® has a self-contained oilBoston Gear spur gears are designed to transmit motion and power between parallel shafts. The different styles offered include spur, gear rack, pinion wire, stem pinions, and internal gears, and most come with a selection of bore diameters, keyways, and setscrews to accommodate a wide variety of application requirements. They are available in plastic, non metallic, brass, steel, and cast iron and are manufactured in a variety of styles, including