Fastener Information for TaperLock and QD Type Bushings

Sometimes little things like shaft keys and bushing fasteners can halt progress when installing belt drive systems. Shaft key sizes were provided in an earlier blog post so sizes can be checked and key stock obtained before starting the installation process.  Lost bushing fasteners and wrench tool availability can also hinder progress.  Fastener sizes by bushing type and size can be found in industry publications, but not typically in concise form.

The following table provides fastener and wrench tool sizes for TaperLock type bushings ranging from the small 1008 size to the large 7060 size:

This information is very useful, as fasteners used with TaperLock bushings can be unusual and the wrench tools needed to tighten them may not always be readily available.  A hex bit socket set is needed for most TaperLock bushing installations.  And don't forget to have an appropriate torque wrench available so fasteners can be accurately tightened to the recommended torque levels.

The following table provides fastener and wrench tool sizes for QD type bushings ranging from the small QT size to the large S size:

Fasteners used for QD type bushings have hex type heads, so are quite common.  Hex type socket tools are generally available in most mechanics tool sets.  Again, don't forget to have an appropriate torque wrench available so fasteners can be accurately tightened to the recommended torque levels.

Don't let a lost fastener or an unexpected wrench tool size hinder progress when installing belt drive systems.  These tables are handy references for standard TaperLock and QD type bushing fastener sizes.  They also provide valuable wrench tool types and sizes as well as recommended fastener torque values.

Feel free to contact us at ptpasupport@gates.com or 303-744-5800 if you have any questions.