Browning Q1 1 7/8 Bushing R-407C making it suitable for both

making it suitable for both residential and demanding industrial heating systems

When the system is running

and NKC199N models

What is the difference between this and the "BGB" model

Browning Q1 1 7/8 Bushing R-407C making it suitable for bothThe Browning Q1 1 7 8 Bushing is a heavy duty split taper bushing engineered for a precise 1 7 8 inch finished bore application. Designed for rigorous HVACR and industrial mechanical drives, this Q1 Series split taper bushing features a 1 2" x 1 4" keyseat and a unique 3 4" per foot taper. The double split barrel design provides a superior 360 degree clamp fit, effectively acting as a solid state connection between the shaft and the mechanical power