Have you ever wondered how a precision timing pulley is manufactured?

Probably not, but we’re going to tell you about it anyway!

Step 1) - Tell us what YOU need

The first step that is taken to produce an Onvio Timing Pulley, is in the Onvio Engineering Department, located in Salem NH.  With a few quick clicks, a drawing is generated using our “in-house developed” timing pulley configuration tool, to meet the exact specifications identified by our customers.   After drawings have been approved by engineering and the customer, your order is released to the Onvio manufacturing team.

Speed Reducer Pulley
Speed Reducer Timing Pulley

Step 2) Cutting Metal

All Onvio timing pulleys start out as raw material delivered to our manufacturing facility in Puebla Mexico from US and Canadian suppliers.  A blank pulley is produced with the pitch, tooth count, and length required for the final part.


The process to hob timing pulleys is a fast and accurate method of cutting toothed parts.  The exact speed, tool profile and angle of the hob and part contribute to the ultimate profile and tooth count of the product.

Here we see an AT10, 40 tooth timing pulley being hobbed from aluminum stock.  As both the tool and part turn, the machine moves the hob along the length of the part.   Hobbing requires both the hobbing tool and the part being cut, to rotate in a synchronized motion.

As the tool is moved along the length of the part, it removes material slowly as it passes across the material, creating the form of the tooth.

To complete the part, the tool will have to take 2-3 passes to reach the exact dimensions required.  The number of passes, speed of the machine, and total process time is determined by the exact pitch, tooth count, and component material.

Timing Pulley's are Machined from either aluminum, steel or plastic.  Onvio's pulleys are produced exactly to your required configuration.

Onvio's make-to-order timing belt pulleys are ideal for the automation and robotics market and are available in all industry tooth profile configurations.  Learn more online at www.onviollc.com Call 866-685-0404.


Step 3) Precision Timing Pulleys produced to the highest quality

The timing pulley blank is then loaded into a CNC lathe to machine rough and final dimensions of the bore and other specified features.   In process inspections happen at each manufacturing stage to ensure all dimensions meet print If milled features are required, such as; threaded face holes, lightening holes, or bolt on flanges, the parts are sent to a CNC milling center, where operators use solid models to create the programs required to complete the timing pulley.

Step 4) Don't settle for a Minimum Plain Bore

After milling, pulleys with tight tolerances on bores can be sent back to receive final machining on the lathe.  Most parts will move on to have post machining processes completed, like keyways broached, flanges rolled or bolted on, anodizing or plating, setscrews installed, or even bearings installed for idler timing pulley applications.  Timing pulleys that require features such as heat treatment, wire EDM, or other specialized processes are sent out to one or more of our partner vendors.

Need an assembly?

Step 5) Out the door and on the way!

Once complete, all timing pulleys are sent through our QC lab for final inspection. Critical features are verified to meet print, and released to our shipping department to be packed and shipped.

Use our timing pulley configuration and quote tool for an estimate on your next project. 

Step 1 of 2

  • Upload Your Drawing for Quote

    Please upload your drawing, sketch, bar napkin, etc.
  • Drop files here or
    Accepted file types: jpg, pdf, png, tiff, zip, gif, step, stp, igs, iges, sat, doc, xls, xlsx, docx.
  • or Configure Your Pulley

    Please fill in as much known information as possible.
  • If you cannot find the pitch you need, please leave blank and tell us the pitch needed in the Special Features/Notes field at the bottom of the form.
  • Select Tooth Count Required
  • Provide width of belt being used. Please specify inch or mm
  • Provide pulley face width desired, if belt width is unknown. Please specify inch or mm.
  • (!) = Premium Feature
  • Required Bore. Please specify inch or mm. For TL or QD bushings, please provide detail in "Special Features" field below.
  • If material or finish required is not listed, please provide your specifications in the Special Features field below.
  • Please specify any required features not already specified above: V-Guide, Bore for TL or QD Bushing, Bearings, Hub Dimensions, Welded Flanges, etc.