FAQ - How To Properly Measure An S-Cam?

With many different sizes of S-Cams for heavy duty trucks, how do you know which size is right for your truck? In order to find the right sized s-cam for your heavy duty truck, you’ll need to take three different measurements.

  1. First, you’ll need to measure the length of the camshaft by measuring from just below the cam head until the beginning of the lock ring groove.
  2. Next, determine the style of the head comparing it to the styles found here and determining the head width.
  3. Finally, measure the diameter of the spider and spline to solidify which s-cam you should get.

It’s very important to make sure your s-cam is properly serviced so you don’t experience a failure and put yourself, and others around you, in danger.

Have Questions About Your Heavy Duty Truck?

Fill out the form on this page to get in contact with the Blaine Brothers team. Leave as much information as possible so we can serve you best the first time. Thanks for considering Blaine Brothers, we look forward to working with you!

  • For emergency service, please call 800.833.3257

  • This field is for validation purposes and should be left unchanged.

We Supply the Brands You Trust

Blaine, MN


10011 Xylite Street NE
Minneapolis, MN 55449

Scanlon, MN


1325 Hwy 45
Scanlon, MN 55720

Clearwater, MN


750 Heaton BLVD
Clearwater, MN 55320

Baldwin, WI


2500 Alreich Ave
Baldwin, WI 54002

Capacity Trucks


10070 Davenport St. NE
Blaine, MN 55449



9515 150th Avenue NE
Columbus, MN 55025