BlackStar 1310 18MM - Taper Lock Bushing - 18mm Bore J The 12/5V1250 has a 5/8"

The 12/5V1250 has a 5/8" width

"sku":"14T10/2250US-D&D"

so a 10T5/1050US from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

"sku":"TB072053106886"

BlackStar 1310 18MM - Taper Lock Bushing - 18mm Bore J The 12/5V1250 has a 5/8"The BlackStar 1310 18MM is a 1310 series taper lock bushing, precision manufactured from high grade steel. Taper Lock bushings provide a secure, concentric grip on the shaft through a precision machined taper, ensuring reliable power transmission. Specifications Part Number 1310 18MM Bushing Type Taper Lock Series 1310 Minimum Bore 1 2" Maximum Bore 1 3 8" Outside Diameter 2. 000" Length 1" Material Steel Approx. Weight 0. 55 lbs Bore Size 18mm Cross