Sprockets made of Redco 750 polyurethane have been a proven solution in sawmills for decades. But it isn’t a case of one size fits all: we get requests for sprockets for all sorts of shapes, sizes, pitches and chains. To be honest, not all of those orders can be filled by us. But in the interests of not wasting your time here are some of the basics you should know.
Our primary sprocket line is for 81x or H-78 sawmill chain. By far the most common sold are the “bolt on” version though the “Snap-It” sprocket is also available (for idler applications only) but that will need to be specified. If asked to provide a recommendation most reps will suggest the bolt-on version due to its added strength and classic appeal. After figuring the chain and sprocket type out, we need to know how many teeth you need for your sprocket along with the length-through-bore and bore size. The final major piece of information we need to know is if there is a keyway and if so, what are its dimensions? Note that unless we get that information explicitly told to us we will assume no keyway.
To some up what information we need to quote:
- For what chain?
- Idler or drive?
- Snap-It or Bolt-On?
- How many teeth?
- Hub diameter?
- Length through bore (LTB)?
- Keyway dimensions?
Based off that information a Redwood Plastics representative can quote you the sprocket or let you know that’s a type that’s unavailable. These sprockets are supplied from molds, not machined, so if it’s not a size we have available tooling charges and increased delivery time may be necessary. For information on Redco sprockets click here.