Standard Spline Shafts

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Grob Standard Spline Shafting has been designed to maximize torsional strength and contact area. Grob’s cold rolled spline shafts are made with an even number of teeth and are parallel over two or more teeth. When your project requires mating parts, look no further.

For your convenience we have off the shelf mating broached sleeves and flanged bushings to match our Grob Standard Spline shafts. We also offer custom broaching of your parts to match with our Grob Standard Splines.

• Full Flank Fit
• Large Contact Area
• Equal size tooth to space ratio
• The same pressure angle as parallel sided spline
• 3 x’s the work surface of parallel sided spline
• Mating sleeves or flanged bushings

Custom spline shafts & shapes are also available 

Specifications

Spline shafts, also known as splined shafts, are a type of rod that features evenly-spaced grooves along the entire length of the rod. They are coupled with mating cylinders to efficiently transmit rotary force. Spline shafts operate similar to gears, but they transfer rotational force along the same axis with a 1/1 ratio. They are ideal for power transmission in heavy equipment, automobiles, and other high-pressure, high-performance operations. The grooved surface of a splined shaft can also stop motion, which makes spline shafts perfect for machines and devices that need linear stability and accuracy.

Types of Spline Shafts

Spline shaft manufacturers create shafts in a range of diameters, tooth angles, and groove depths to facilitate numerous operations. Spline shafts can be divided into five categories:

• Grob Standard Spline Shaft: Grob standard spline shafts are engineered to ensure maximum contact and torque using an even number of teeth and parallel over 2 or more teeth to be self centering.
• Involute Spline: Involute splines feature gear like teeth that enhance surface contact and distribute force in a way that reduces stress on the splines while transmitting extremely high torque.
• ISO-14 Straight Sided Splines: Based on International Organization for Standards (ISO) guidelines, these splines are categorized using metric measurements in millimeters. Splines manufactured to ISO-14 standards meet specific dimensional, control, and gauge standards for light, medium, and heavy use.
• SAE Spline: Similar to ISO standards, the Society of Automotive Engineers (SAE) splines meet standards for safety and efficiency. SAE standard splines are measured in standard rather than metric. SAE specifies mounting requirements in addition to dimensions and gauges.
• Power Take-Off (PTO) Shafts: PTO shafts are high-performance driveshafts engineered specifically for heavy-duty vehicles and equipment. A combination of SAE, involute, and Grob standard spline designs, PTO shafts transfer power from the engine to other accessories.

Grob, Inc. Custom Spline Shaft Capabilities

At Grob, Inc., we produce custom splined shafts with unique design specifications to suit the needs of your specialty application. All of our splines are formed using the Grob Cold Rolling method, which can withstand extreme torsional force better than any other manufacturing process. Our capabilities include:

• Length: Standard 3′, 6′ and 12′. Longer shafts can be provided.
• Diameter: Between .25″ and 6″ diameters
• Hardness: Up to a maximum of 44 RC
• Pressure Angle to customers needs
• Diametral Pitch 6 to 48
• Pitch: 1/16” to 1.5”
• Tooth Range: 4 teeth minimum, up to the maximum allowed within diameter and pitch specifications

Spline Shaft Materials

Spline shafts must transmit high levels of force under extreme environmental conditions. To meet specific application requirements, we manufacture spline shafts in a variety of materials, including:  

• Stainless Steel: Strong and extremely corrosion-resistant, stainless steel is an iron alloy with a minimum of 10.5% chromium. 
• Carbon Steel: Carbon steel contains approximately 1.7% carbon, which gives it the perfect combination of strength and malleability to provide smooth power transmission.
• Alloy Steels: Alloy steels are formulated with various mixtures of iron, chromium, molybdenum, nickel, and carbon for enhanced strength and hardenability. 
• Aluminum Alloys: Aluminum alloys are corrosion resistant, with a high strength-to-weight ratio that makes them ideal for weight-sensitive applications. 
• Bronze: Bronze is strong and durable without brittleness. It has a low friction coefficient and is highly resistant to saltwater corrosion. 

Applications & Advantages of Using Spline Shafts

Grob’s high-quality spline shafts offer a variety of unique advantages over keyways, set screws, and other transmission methods. Benefits of our spline shafts include: 

• Highly-controlled torque
• Superior surface finish
• Ideal for high-volume production lines
• Extremely versatile
• Outstanding strength and durability
• Minimal backlash

These benefits make our spline shafts the go-to option for a wide range of industries, including:

• Automotive
• Aviation
• Construction
• Heavy Equipment
• Industrial Machinery
• Consumer Goods
• Specialized Instruments

Standard Cold Rolled Spline Shafts from Grob, Inc.

Grob, Inc. is a leading provider of cold-formed spline shafts in standard and custom configurations. To learn more about our quality custom spline shafts, timing belt pulleys, flanged bushings, and other motion solutions, contact us today or request a quote.