MasterDrive SK QD Bushing 24mm Bore Steel - 3385

Reliable 24mm Shaft Locking in a Compact SK QD Bushing

The MasterDrive SK 24mm bushing is a Quick Disconnect (QD) tapered mechanical bushing engineered for mounting SK-taper sheaves, sprockets, and pulleys onto standard 24 mm drive shafts. It delivers fast, repeatable mounting and removal with a strong, slip-free connection - exactly what metric shaft applications demand.

Whether you're building new equipment or maintaining existing lines, this bushing integrates seamlessly with standard SK QD hubs used across power transmission systems, conveyor systems, and general industrial drives.

Why You'll Love the Masterdrive SK 24mm Bushing

Every benefit below translates directly into less downtime, longer component life, and simpler maintenance across your facility.

• Consistent, slip-free torque transmission – The tapered design creates a high-torque friction grip preventing slippage, even under sustained loads in fans, blowers, and small gear drives. This eliminates fretting corrosion, keyway damage, and the kind of hub slippage that stalls production unexpectedly.

• Fast installation and removal – It features a split flange and tapered barrel for easy installation and removal using standard hand tools. The jacking bolt feature allows effortless removal during maintenance, cutting changeout time dramatically and keeping your lines running.

• Protection for shafts and hubs – Clamping force is distributed around the full shaft circumference rather than concentrated at a single keyway or set screw point. This reduces shaft scoring and extends the service life of both the shaft and the mating pulley or sprocket.

• Durable construction for demanding environments – The SKx24mm is machined from solid steel and features ductile iron construction that provides superior strength and durability under heavy loads. A black phosphate finish enhances corrosion resistance during storage and normal indoor operation.

• Flexible use across your drive components – The design allows for quick interchangeability with other SK-series bushings, meaning one bushing style works with a broad range of SK sheaves, sprockets, and timing pulleys. This simplifies your accessories inventory and streamlines maintenance planning across multiple machines.

What Makes This SK 24mm Bushing Different

Generic QD bushings may share the SK label, but inconsistent machining, loose tolerances, and inferior hardware can mean vibration problems, premature wear, and unplanned downtime. The MasterDrive SK 24mm bushing is built differently.

• Precision-machined 24mm bore and taper – The bushing has a 24mm finished bore designed for mounting onto a drive shaft with tight concentricity. Better concentricity means reduced vibration, improved belt or chain tracking, and quieter operation at speed. The bushing includes an 8mm x 3.3mm keyway and set screw to prevent slippage during assembly and service.

• Standard SK QD interface with MasterDrive quality control – It fits components designed for SK series QD bushings and follows industry-standard SK geometry. The SKx24mm replaces Dodge SK X 24MM bushing and cross-references with other major master brands that specify SK 24mm, so you can adopt it without re-engineering your drive layout.

• Thoughtful hardware and finish – Properly graded cap screws are included and sized for the SK bolt circle, delivering balanced clamping force. The black phosphate finish resists seizing during extended service, making future removal as straightforward as the initial installation.

How It Works

Installing an SK QD bushing on a 24 mm shaft is a simple three-step process that requires no presses, heaters, or specialized pullers.

1. Position the Bushing on the 24mm Shaft

Slide the SK 24mm bushing onto a clean, deburred 24 mm shaft. Align the key stock with the 8mm x 3.3mm keyway machined into the bore. Orient the flange so that it mates with the SK-type hub in your sheave, sprocket, or pulley, then seat both components together at the desired location on the shaft.

2. Draw the Taper Tight with Cap Screws

Place the SK-compatible drive component over the bushing's tapered barrel and insert the supplied cap screws through the flange into the threaded holes. Tighten each screw incrementally in a star or alternating pattern. This pulls the hub onto the taper, compressing the split bushing onto the 24 mm shaft. The action centers the mounted component and generates the clamping force that transmits torque - the high torque handling capability allows the bushing to manage substantial torque loads without slippage.

3. Verify Alignment and Lock in the Connection

Check axial location, belt or chain alignment, and shaft runout after reaching final recommended torque. Confirm that the pulley or sprocket spins true and that all cap screws remain seated. To remove, back out the mounting screws and thread them into the jacking holes, then tighten evenly to push the hub off the taper and release the bushing from the shaft - no special pullers required.

Product Details

Quick-reference specifications for engineers, maintenance planners, and anyone buying this component for upcoming projects:

• Series and style: MasterDrive SK-series QD (Quick Detachable) bushing, flanged and fully split through flange and barrel.

• Bore size: 24 mm straight finished bore (SKx24mm has a 24mm bore size), designed for standard metric 24 mm shafts commonly used in light to medium-duty drives.

• Outside diameter: The outside diameter of the SKx24mm is 3.875 inches (~98.4 mm), fitting standard SK-type sheaves and sprockets.

• Flange details: Round flange with three equally spaced cap screw holes on the SK bolt circle, providing balanced clamping around the hub.

• Material: Machined from solid steel with ductile iron construction - not sintered - for high strength and reliable friction fit under typical electric motor and gearbox outputs.

• Finish: Black phosphate finish to enhance corrosion resistance during storage and normal indoor operation.

• Keyway: 8mm x 3.3mm keyway with set screw for positive rotational locking.

• Hardware included: Matching cap screws sized for SK bushings, ready for immediate installation into SK-type mating hubs.

• Compatibility: The MasterDrive SK 24mm bushing is commonly used to securely attach pulleys, sheaves, and sprockets. It fits SK-bushed timing pulleys, couplings, and any component designed for SK QD bushings with a 24 mm bore.

• Interchangeability: Dimensionally compatible with standard SK-series hubs from major brands, assuming SK geometry and 24 mm bore are specified. 

Who It's For

Not sure if this bushing fits your application? Here's who benefits most from the MasterDrive SK 24mm.

• Maintenance teams upgrading or replacing SK bushings – If you're maintaining existing SK QD drives and need a reliable 24 mm replacement for worn or seized bushings, this is a direct drop-in. The MasterDrive SK 24mm bushing is widely used in industrial machinery and conveyor systems where quick turnaround matters.

• Machine builders using metric 24mm shafts – OEM designers standardizing on 24 mm shafts in fans, small conveyors, and material handling equipment that specify SK-style hubs will save engineering time by specifying a bushing with a proven, interchangeable interface.

Frequently Asked Questions

Below are the most common technical and practical questions we receive about the MasterDrive SK 24mm bushing. Your feedback on additional topics is always welcome.

Is the Masterdrive SK 24mm bushing easy to install?

Yes. Installation uses standard hand tools - typically a hex wrench or socket - following a simple sequence: slide onto the 24 mm shaft, position the SK hub, and tighten the three cap screws evenly in an alternating pattern. No special pullers are needed for removal thanks to the jacking bolt feature built into the SK flange. Most experienced technicians complete a full changeout in minutes.

What components does the SK 24mm bushing fit?

It fits SK-series QD-compatible sheaves, timing pulleys, sprockets, and couplings designed for SK bushings with a 24 mm bore and SK bolt pattern. Before buying or installing, confirm that the mating hub is marked "SK" and that the required bore is 24 mm. This information is typically stamped on the hub or listed in the manufacturer's catalog.

Will this SK 24mm bushing interchange with other SK 24mm brands?

SK dimensions are standardized across the power transmission industry. The MasterDrive SK 24mm bushing is intended to interchange with other SK 24mm units - including the Dodge SK X 24MM - that follow standard SK geometry. Always verify series (SK), bore size (24 mm), and hub style to ensure correct fit across categories from different manufacturers.

How long will the bushing last in service?

Service life depends on load, alignment, and maintenance practices. Ductile iron construction and the precision-machined taper deliver long-term, repeatable performance under normal operating conditions. Regular inspection of shaft condition, keyways, and mounting screws will help maintain safe, reliable operation and allow you to catch wear before it becomes a problem.

What if my shaft is slightly worn or undersized?

Minor surface wear may still allow adequate clamping if the shaft remains within reasonable tolerance of 24 mm. However, shafts with heavy scoring, steps, or significant undersize should be repaired or replaced to restore full holding power. Clean and measure the 24 mm shaft with a micrometer before deciding to reuse it with a new SK bushing - this small step can save you from premature slippage or component damage down the line.

Ready to Upgrade Your 24mm SK Mounting?

The MasterDrive SK 24mm bushing delivers secure, precise, and repeatable mounting of SK-driven components on 24 mm shafts - backed by solid steel construction, a corrosion-resistant finish, and hardware that's ready to install right out of the box. All rights to dependable, low-maintenance power transmission start with the right bushing.

If your facility relies on SK sheaves, sprockets, or pulleys on metric shafts, standardize on the MasterDrive SK 24mm bushing for consistent performance across every drive in your operation. Add the MasterDrive SK 24mm bushing to your cart today for your next build, upgrade, or planned maintenance interval.