Splined shafts

A splined shaft is equipment having a number of equally spaced grooves cut in the shaft so as to form a series of projecting keys and to fit into an internally grooved cylindrical member. These are of three types: involute spine, shaft spine and Din5480 spine and have length of 550mm, 800mm and 1000mm respectively. These have a diameter of 60mm.

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Detailed Description for Splined shafts

Technically, spined shafts are mechanical components that provide anti-rotation movement when working as linear guide or otherwise transmit a torque. The splines or say, grooves are machined along the length of the shift. They get fit into a female-splinded bore, gear or other mating component. When paired with an internally-splined bearing or blushing, they function as a linear guide or else they transfer rotary motion in rotary drive applications.

Types:

Spline shafts are differentiated by the types of grooves that transmit torque.

·         Parallel key: splines have ridges with a square profile.

·         Involute splines: contain tapered ridges that decrease concentration.

·         Crowned splines: these have modified teeth that taper towards the end face to allow for angular misalignment.

·         Serrations: teeth are in form of included angle that allows for more teeth on a smaller diameter shaft.

·         Helical splines: these have either parallel or involute teeth. They incorporate rotary and linear motion and also minimize stress concentrations for a fixed joint under very high load.

Materials:

These shafts are primarily manufactured from metallic elements due to localized stresses between the teeth or tongue of shaft.

Alloy steels: these include hardenable high-alloy steels, high strength low-alloy steels, and other speciality steel toys.

Aluminium steels: provide high toughness, good corrosion resistance and less than half density as compared to steel.

Carbon steel: commercial iron which contains carbon in any amount up to about 1.7% as an essential alloying constituent.

Stainless steels: highly corrosion resistant, ferrous alloys containing chromium/or nickel additions.

 

Features:

·         Chamfered: this is to prevent stress concentrations. End of the splines are cut at an angle.

·         Shaft/hub assembly: both internal and external splines are packaged together and offered as an assembly.

Buying tips:

ü  Shafts are manufactured to one specific (standard) length, so that it could be cut to a specific length.

ü  Make sure the shaft you are going to buy is matching your own need and is conforming the desired length.

Do check the shaft diameter of the spline. It should not be less than it is necessary to permit easy slip-fitting of components.


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