CMG offers internal/external splines as a service for customers who provide their own blanks as well. Carnes-Miller Gear can hob/shape external splines on blanks and shafts or shape/broach internal splines in gears or other cylinders.

Cut Teeth Only

Our larger shafts are 5in/127mm in diameter by 40in/1000mm length. The maximum spline length we can produce is 5.0″. CMG has all of the spline standards necessary to produce the proper spline.

Involute Splines
To assure that a spline achieves a proper fit, we request that gaging be included or considered in the quote. We also recommend full complement gaging for involute splines, especially in difficult to reach splines and harder grades of material. The alternative requires measurement between wires, which frequently is impractical.

For small lot quantities and reverse-engineering solutions where gaging may not be practical, the mating part, either male or female, can be used as the standard. Otherwise, we would have to consider making both parts, or else researching and developing different possibilities.

Straight-Sided Splines
Internal Splines
Internal straight-sided splines may require manufacturing either by broaching or by shaping.

Broaching is generally the best solution, depending on the quantity and length/size of spline.

Shaping can be more costly since it normally requires fabrication of a special cutter, or a single cutter to feed and index each slot.

External Splines
External straight-sided splines require a specially designed hob in order to produce the proper key and root width.

Carnes-Miller Gear generally has the tooling needed in our inventory. We recommend gaging or mating part verification to insure proper fit. Let CMG offer Internal/External Splines as a service to your needs!