superior strength
through innovation

Custom Splines & Shapes

Custom Spline Shafts

Even though Grob offers you a variety of standard spline shafts to choose from, some applications require a custom spline shaft or custom shapes.  Grob’s custom spline shaft manufacturing and engineering staff has the ability to create custom tooling providing you with the custom spline shafts and shapes you require.  Grob’s engineers and tool makers are proud partners in the cooperative development of your spline shaft.  After your new shape has been created, a sample will be sent for testing before beginning production of your new part.  Grob’s cold rolling process provides several advantages over hobbing, cutting and other metal forming methods.

  • Involute Spline Shafts
  • Straight Sided Spline Shafts
  • Metric Spline Shafts
  • Spline Shafts To your specifications

Custom Shapes

Grob is often asked if they can create custom shapes. The answer is YES. Grob understands that your product may require a custom shape. Either way Grob can provide you with the right shape for the job. Grob’s experienced engineering staff will partner with your company to develop the exact custom shape that is required; whether you need a proprietary component or a replacement part.


  • Gerotor
  • Ratchets
  • Splines
  • Gears