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Splines
Click on a link below to learn more about the different types of splines CMG manufactures.
Splines
Involute Splines
Straight-Sided Splines
Splines
Splines are used for a positive connection between shafts and their mating parts. The scope of manufacturing splines at CMG is nonhelical, involute and straight-sided internal and external splines.CMG is familiar with the various standards of spline manufacturing to include: ANSI B92.1-1970, ANSI B92.1-1996, and Metric ANSI B92.2M-1980. CMG can hob/shape external splines on shafts or shape/broach internal splines in gears or other cylinders. Some of our larger shafts are 5.0” in diameter by 40.0” in length.
Involute Splines
Considerations for involute splines, both internal and external.CMG recommends full compliment gaging for internal splines, especially in the difficult to reach splines and the harder grades of material. The purpose of splines is to insure the proper fit and problems can be avoided if gaging is included in your buget and made available to the manufacturer. The alternate method would be measurement between wires, and sometimes that is not practical.
CMG recognizes in small lot quantities and reverse engineering solutions, this may not be practical. In this case the mating part, either male or female, may suffice, especially if we can trace the design to a known standard and tolerance. Lacking this you may have to consider having both parts made or else be amicable to working through some “guesswork” trial and error.
Straight-Sided Splines
Consideration for straight-sided splines, both internal and external.Internal straight-sided splines quickly become a tooling issue. Our manufacturing choices are to produce this spline by broaching or by shaping. The initial tooling cost for a broach may not be practical, but it is generally the best solution, depending on the quantity and length/size of spline. Shaping as an option, turns into a tooling problem as well due to tool interference during the cut of an internal straight-sided spline. Generally a special cutter will have to be made, or a single cutter to feed and and index each slot. This tends to become expensive as well.
External straight-sided splines again require a hob designed for that particular spline in order to produce the proper key and root width. CMG has much of this type of tooling in its inventory. Again, CMG recommends gaging or mating part verification to insure proper fit.
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