Weld On Hub | XX-Series

Our XX-Series weld on hubs give you plenty to choose from, without turning the selection process into a headache.

Choose from stock bores, standard round bores, square bores, idler bores, and spline bores, with common sizes ready to ship.

Each weld on hub is manufactured to tight, consistent specifications so you get the fit you expect when it’s time to install. We also carry sprockets designed specifically for XX-Series hubs, like the XX-Series Weld On Hub With 1-5/8" Bore, making it easy to get compatible parts in one place.

Not sure which setup you need? Get in touch with our team and we’ll help you match the right hub and sprocket to your application.

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How Weld on Hubs Work With Sprockets

A weld on hub gives you a practical way to turn a compatible plate sprocket into a shaft-ready component.

Instead of stocking a finished-bore sprocket for every shaft size, you can pair the sprocket with the hub configuration your equipment needs.

1. Start With Compatible Components

The hub and sprocket need to be designed to work together.

A weld on sprocket hub fits into the center of a compatible sprocket and can then be positioned and welded in place.

Check the series, dimensions, and manufacturer specifications before putting anything under the welder.

2. Welding Creates the Finished Assembly

Once properly aligned, the hub is welded to the sprocket to create a weld on hub assembly.

Accurate alignment matters here. A hub that's off-center or crooked can contribute to chain misalignment, vibration, and uneven wear once the sprocket starts turning.

Why Use This Setup?

Flexibility is the big advantage. A weld on hub lets you combine compatible sprockets and bore configurations to suit different shafts and equipment.

That can simplify inventory for shops that maintain several machines with different shaft requirements.

How To Choose the Right Weld on Hub

A weld on hub may look straightforward, but a few specifications determine whether it belongs on your equipment.

Run through these specs before choosing a hub:

1. Identify the Hub Series

Start with the series required by your sprocket.

Components from different series may have different dimensions and aren't automatically interchangeable, even when they look close enough on the workbench.

2. Match the Bore to the Shaft

Measure your shaft and select the appropriate bore size and style.

Depending on the equipment, you may need a standard round, square, idler, or spline bore. Also confirm the keyway and set-screw requirements where applicable.

3. Check Your Sprocket

Your weld hub needs to match the sprocket it's being attached to.

Verify the sprocket's hub-series compatibility, center opening, thickness, and other manufacturer specifications rather than choosing based on bore size alone.

4. Consider the Actual Workload

Think about what the assembly will deal with once the machine is running.

Load, speed, starts and stops, operating hours, and environmental conditions can all influence the appropriate hub and sprocket setup.

Before You Order: Check These Measurements

Nobody wants to discover a 1/16-inch problem halfway through installation.

Before purchasing a weld on hub, grab your measurements and compare them with the product specifications.

Shaft and Bore Diameter

Measure the shaft diameter first, then verify the required bore. Don't assume the old hub tells the whole story, especially if you're working on equipment that's been modified over the years.

Keyway or Spline Dimensions

If your setup uses a keyed or splined shaft, confirm those dimensions as well.

The bore can be the correct diameter and still be completely wrong for the shaft connection.

Hub and Sprocket Dimensions

Check the hub's outside diameter, length through the bore, and mating dimensions against the compatible sprocket.

You should also confirm there's enough clearance around the finished weld on hub assembly for nearby bearings, guards, frames, and other components.

Sprocket Alignment

If you're replacing an existing assembly, note where the sprocket engages on the shaft before removing it.

Maintaining the correct chain line helps prevent side loading and unnecessary roller chain and sprocket wear.

Weld on Sprocket Hub: FAQs

Can you weld a hub to any sprocket?

No. The weld on hub and sprocket should be designed for use together, with compatible dimensions and materials.

Always check the manufacturer's specifications before welding.

How do I know which hub series I need?

Start with the compatible hub series specified for your sprocket.

From there, choose the bore size and style that match your shaft and mounting requirements.

What's the difference between a weld on hub and a finished-bore sprocket?

A finished-bore sprocket already has its hub and bore configuration manufactured as one ready-to-mount component.

A weld-on setup lets you pair a compatible sprocket with the hub you need and weld them together, giving you more flexibility when building an assembly.

Should I replace the sprocket when replacing the hub?

Inspect both before making the call.

If the sprocket has hooked teeth, uneven wear, cracks, or other damage, reusing it may shorten the life of the chain or new assembly.

A quick inspection now beats taking everything apart again later. If the sprocket is due for replacement, it’s worth checking the chain at the same time.

Our guide to replacing sprockets and chains together explains why changing one worn component can affect the life and performance of the other.