Request a Custom Idler Sprocket Quote
Can’t find the roller chain idler sprocket you need? MDS of Michigan can help quote a custom Type A idler sprocket based on your required chain size, number of teeth, bore size, and quantity.
At MDS of Michigan, we supply custom Type A roller chain idler sprockets for #25, #35, #40, #41, #50, #60, #80, and #100 single-strand roller chain. All custom idler sprockets include an installed bearing with metal shields.
Request a Custom Idler Sprocket Quote
Need a stock or custom A plate idler sprocket? Tell us about your application, and we will take care of the rest. Our team will review your requirements and Fill out the form below and our team will review your request.
Custom Type A Idler Sprockets for Roller Chain Drives
Roller chain idler sprockets are used to guide chain, take up slack, maintain chain alignment, and increase chain engagement around other sprockets. When a standard idler sprocket does not have the correct chain size, number of teeth, or bore size, we can help quote a custom Type A idler sprocket.
We can help quote custom idler sprockets based on:
- Quantity needed
- Roller chain size
- Number of teeth
- Bearing bore size
Looking for a standard idler sprocket? Shop our in-stock Type A and Type B roller chain idler sprocket inventory online.
Custom Idler Sprocket Options
MDS of Michigan can help supply custom Type A idler sprockets for common single-strand ANSI roller chain sizes. Choose the roller chain size, number of teeth, and bearing bore size required for your application.
All custom idler sprockets are Type A plate sprockets and include an installed bearing with metal shields. The shields help protect the internal bearing components while allowing the idler sprocket to rotate freely.
Not sure which chain size you need? Use the roller chain dimensions chart below or follow our guide on how to measure roller chain with calipers.
Available Single-Strand Roller Chain Sizes
Custom Type A idler sprockets are available for the following ANSI single-strand roller chain sizes. Use the pitch and roller dimensions below to help identify your chain.
| Chain Size | Pitch | Roller Width | Roller Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|
| #25 | 1/4″ | 0.125″ | 0.130″ | 0.230″ | 0.030″ |
| #35 | 3/8″ | 0.188″ | 0.200″ | 0.340″ | 0.050″ |
| #40 | 1/2″ | 0.312″ | 0.312″ | 0.463″ | 0.060″ |
| #41 | 1/2″ | 0.250″ | 0.306″ | 0.386″ | 0.050″ |
| #50 | 5/8″ | 0.375″ | 0.400″ | 0.579″ | 0.080″ |
| #60 | 3/4″ | 0.500″ | 0.469″ | 0.579″ | 0.094″ |
| #80 | 1″ | 0.625″ | 0.625″ | 0.935″ | 0.125″ |
| #100 | 1-1/4″ | 0.750″ | 0.750″ | 1.165″ | 0.156″ |
Not sure which roller chain size you have? Measure from the center of one chain pin to the center of the next pin to determine the chain pitch.
Information Needed for a Custom Idler Sprocket Quote
Provide the following information so our team can review your request and prepare pricing:
- Quantity Needed — The number of custom idler sprockets required.
- Roller Chain Size — #25, #35, #40, #41, #50, #60, #80, or #100 single-strand roller chain.
- Number of Teeth — The total number of teeth required on the sprocket.
- Bore Size — The inside diameter of the bearing that fits over the shaft, bolt, or mounting pin.
That is all we need to get started on your custom idler sprocket quote.
Industries and Applications
Custom roller chain idler sprockets are used wherever a chain needs added support, better alignment, or more controlled routing through a drive system. They can act as tensioning sprockets, support long spans of chain, guide chain around obstructions, and increase chain wrap around a drive or driven sprocket for better engagement.
They are commonly used in new equipment builds, replacement applications, and custom machinery where a standard sprocket does not provide the right tooth count, bore size, or bearing configuration.
- Conveyor systems
- Agricultural equipment
- Material handling equipment
- Packaging machinery
- Food-processing equipment
- Industrial production machinery
- Chain tensioning and take-up assemblies
- Long chain-span support
- Chain routing around obstructions
- Increasing chain wrap and sprocket engagement
- Replacement and obsolete equipment applications
Whether you need one replacement sprocket or a production quantity of custom Type A idler sprockets, MDS of Michigan can help quote the right size for your roller chain drive.
Can’t find what you’re looking for? Submit the form above or browse our in-stock Type A and Type B roller chain idler sprocket inventory.
Shop Roller Chain Idler Sprockets
