How to Weld a Weld-On Sprocket and Weld-On Hub Together
Weld-on sprockets are useful when a standard finished-bore sprocket just does not fit what you are working on. You can pair the sprocket with a weld-on hub that matches your shaft size, bore, or custom setup.
Before Welding a Weld-On Sprocket
Before you start welding, make sure the hub and sprocket actually belong together. Check the sprocket series, chain size, bore requirement, and the shaft you are trying to fit.
For example, XX weld-on hubs can be used with larger weld-on sprocket sizes, with common minimum sprocket sizes including 4024X, 5020X, 6017X, 8014X, and 10013X.
It is also worth checking chain clearance before you ever strike an arc. Larger sprockets usually give you more room around the hub. On smaller sprockets, the weld bead can end up surprisingly close to where the roller chain needs to travel.
Welding note: Low-hydrogen electrodes are commonly recommended for welding weld-on sprocket parts. Always choose the welding process, filler material, and procedure based on the sprocket material, equipment, and application.
How to Weld a Weld-On Sprocket and Hub
The part that matters most is keeping the hub square to the sprocket. Taking an extra minute to get everything lined up before the final weld can save you from fighting a sprocket that runs crooked later.
Large vs. Small Weld-On Sprockets
With a larger weld-on sprocket, you normally have more room between the hub and the chain path, so there is a little more forgiveness when placing the weld.
On a smaller sprocket, everything gets tighter. A weld that looks fine at first can end up rubbing the chain once the sprocket is installed.
The simple version: clean it, clamp it square, tack it evenly, check it again, and keep the weld away from the chain.
Why Have MDS of Michigan Weld It?
Sometimes it makes more sense to have somebody else handle it, especially if you only have one sprocket and do not want to find out after the fact that it was welded crooked.
We can weld weld-on sprockets and hubs together here at MDS of Michigan in Jenison. If the job needs a little more than welding, our in-house machinist can also help with bore sizing, keyways, and other modifications.
That can be especially useful when you are trying to match an existing shaft, repair an older piece of equipment, or put together something that does not use an off-the-shelf sprocket.
Need a Weld-On Sprocket and Hub?
We can help you find the right weld-on sprocket, match it with the correct hub, and weld or machine the assembly for your application.
