BlackStar 100R45 - 100 Pitch R Sprocket - 45 Tooth Wide Inner Ring Eccentric Collar Is 2/A84 the same as

Is 2/A84 the same as other brands' 2/A84

2/B137 is a banded v-belt used on industrial drives - fans and blowers

The Turner UCP211 55MM L3 is a 2-bolt pillow block mounted bearing unit with a 55mm bore

so the Megadyne SPZ1687 interchanges with Gates

BlackStar 100R45 - 100 Pitch R Sprocket - 45 Tooth Wide Inner Ring Eccentric Collar Is 2/A84 the same asThe BlackStar 100R45 is a 100 pitch R roller chain sprocket with 45 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Requires a Split Taper Bushing (sold separately). Specifications Part Number 100R45 Chain Pitch 100 Number of Teeth 45 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Outside Diameter 18. 63" Pitch Diameter 17. 920" Approx. Weight 50. 500