Spline Shafts for Agriculture Applications
Featured Product from Grob, Inc.
Custom Spline Shafts for Agriculture Applications
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 specification
- Save time & money
- Create parts from bar stock
- Over 1700 shapes from existing tool
- Custom shapes tooled quickly
Cold Rolled Advantage
Strenght and Surface Finish
The Grob Rolling process increases the strength by rearranging the grain structure of the material over the entire tooth profile. The greatest amount of strength is gained near the bottom, or root area of the form where strength is most crucial. The result of the cold forming process produces a very high surface finish. Roughness average, Ra Readings of 4 micro inches have been produced.
Grob Rolling Method
With Grob cold roll forming, the groove is formed down between the teeth. The material displaced from area "A" (see sketch below) forms the tooth tip area "B". This is a severe reverse flow. With no elongation, the area of raw material displaced must be the exact same as the area it was displaced from.
Through this process, we're able to roll both even and uneven numbers of teeth on a cylindrical blank with symmetrical patterns only. Tubular blanks can be formed over a grooved mandrel, which permits internal corrugation of the blank white external shape is rolled.
Material and Solid Blank Preparation
Because the Grob Rolling process displaces material instead of removing it, proper material selection is important. With this process, almost any ductile material may be used. Generally, material with a hardness of less than Rockwell "C" 20 works well. If carbon steel or alloy steel is to be used, it must be annealed first. The blank or stock must be free of flaws, uniform in ductility, and must be the correct outside diameter to produce an accurate form.
Strength Through Innovation
Work hardening of the rolled form depends on the material composition, the hardness before rolling, the depth of the tooth form, and the feed rate of rolling. Not all material works well for the same shape. For example, aluminum and some stainless steels may be formed to produce a spline shape or shallow tooth form, but may not be used to produce a full depth gear because the material work hardens too quickly and will not flow up to fill in the tooth form
Grob Inc. is a unique manufacturer of metal cutting bandsaws and cold rolled products. With over six decades of industry-changing patents and innovations, the family owned and operated company offers superior performance and strength in everything they make.