Taper lock bushing dimensions are outlined by 4 digits symbolizing two figures. The first two digits represent the greatest bore diameter and the previous two digits depict the bushing duration. For instance, component quantity 1008 has a optimum ID of 1." and an ID dimension of .8" inches, with the total length specified as a whole variety of inches adopted by a portion. For instance, a 1.5" diameter hole would be 1-1/2. Metric gap measurements are indicated by "MM" right after the metric measurement (X 25MM). Easy to set up and take away, these bushings fit on tapered bushing sprockets, or pulley. Bushing touches and wedges inwards, clamping sprocket shaft and bore. Bushing has an 8° taper and is made of steel with a black oxide coating.