QD pulleyQD Pulley

The “Quick Detachable” QD bushings from MSB are easy to install and remove. They are split through flange and tapered to provide a true clamp on the shaft that is equivalent to shrink fit. The taper-bored “QD” item easily fits over the tapered bush and tightening of the cap screws produces a tight fit on the shaft. The bush is easily removed from the hub by using the pull-up bolts as jack screws. Sizes available include QH, JA, SH, SDS, SD, SK, SF, E, F. All bushes are available in pilot bore, and can be re-bored to suit the shaft requirements. All bushes ‘‘JA’’ through ‘‘F” are drilled for Reverse Mounting. MSB make QD bushing are available in inches & metric sizes and are 100% interchangeable with licensed manufacturer’s OE products.


1. Be sure the tapered cone surfaces of the bushing and the inside of the driven product are clean and free of anti-seize lubricants.
2. Slide QD bushing on shaft, range end ?rst. Assemble key.
3. Position QD bushing on shaft. Tighten set screw over key “hand tight” with standard Allen wrench only. Do not use excessive force.
4. Slide large end of sheave or sprocket taper bore into position over cone aligning drilled bolt holes in sheave or sprocket with tapped holes in range of bushing. Assemble pull-up bolts and lock washers.
NOTE: Install M thru S bushings in the hub so that the two extra holes in the hub are located as far as possible from the bushing’s saw cut.
5. Tighten pull-up bolts alternately and evenly to tightness indicated in torque table on back. Do not use extensions on wrench handles. There should be a gap between the face of the sheave or sprocket hub and the Range of the QD bushing to insure a satisfactory cone grip and press it.

1. Remove pull-up bolts and screw them into TAPPED holes in sheave or sprocket and against range of QD bushing to break cone grip.
2. Loosen set screw and slide QD bushing from shaft.




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