What’s the Difference Between a Taper-Lock and QD Bushing?

With so many different types of bushings, what are the main differences between a taper-lock and QD bushing? Let’s start with what a steel bushing actually is. Steel bushings are akin to thin tubes most commonly used for machinery with rotating or sliding shafts to improve efficiency and reduce vibration and noise. As we like to call them, the unsung heroes of the manufacturing floor. They take the beating so the drive shaft and housing of your machines don’t have to.

Read Our “Buyer’s Guide to Steel Bushings”

What is a QD Bushing?

Quick detachable bushings (or QD) feature a flange on the outside diameter which is often used to secure the bushing to a sprocket or pulley. More distinctly, QD bushings also feature a split through the flange and taper which makes installation and removal much easier while also improving the holding power by tightening cap screws.

A QT bushing is a specific size of QD bushing which features reverse mounting and, unlike most QD bushings, do not have a setscrew over the key. Other QD bushing sizes include: SD, SK, J, F, E, SF, SDS, SH, and JA.

What is a Taper-Lock Bushing?

Like QD bushings, taper-lock bushings also feature a split side for enhanced clamping power. Unlike QD bushings, taper-lock bushings gradually taper along the length-thru-bore in order to provide an even tighter fit on the drive shaft. This tapering allows for a shorter length-thru-bore and narrower sprocket hubs. Taper-lock bushing sizes include: 1008, 1108, 1210, 1215, 1310, 1610, 1615, 2012, 2517, 2525, 3020, and 3030.

What is the Main Difference Between a Taper-Lock and QD Bushing?

The main difference between the two, which was already mentioned, is that the QD bushing has a flange around the outside diameter. The taper-lock bushing has straight sides on the OD which is meant to mount flush. Many people refer to both types as a “taper-lock” because they both use the tapered wedging action to lock to the shaft, but that is technically in correct.

How Can We Help?

Do you need a bushing for your next project? Keep your equipment running smoothly and efficiently. Let our team at MDS help. If you don’t see what you need in our online store or if you have any additional questions, call us at (616) 669-0600 8am – 5pm EST or contact us here. We can search our full inventory or provide a custom solution for you and your team.

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