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2. Spline (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Spline_(mechanical)

   Splines are ubiquitous in aerospace, due to the spline's higher reliability and fatigue life compared to keyed shafts. Splines are used in several places in bicycles. The crank arm to BB shaft interfaces that are splined include ISIS Drive, Truvativ GXP and Howitzer, Shimano's Octalink and many others, most of which are proprietary. Some ...

3. Key (engineering) - Wikipedia

   en.wikipedia.org/wiki/Key_(engineering)

   For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. The whole system is called a keyed joint. [1] [2] A keyed joint may allow relative axial movement between the parts. Commonly keyed components include gears, pulleys, couplings, and washers.

4. Hirth joint - Wikipedia

   en.wikipedia.org/wiki/Hirth_joint

   Hirth joint made from anodized aluminum to show the meshing of the teeth Hirth joint (disassembled) between the semi-axles of a Campagnolo Ultra-Torque crankset. Face spline joints consist of a ring of radial splines or teeth milled or ground into the end faces of two rotary components such as a drive shaft and the hub of a wheel.

5. Chuck (engineering) - Wikipedia

   en.wikipedia.org/wiki/Chuck_(engineering)

   The Jacobs type chuck, with three converging splines or jaws, is perhaps the most usual design. This one is tightened with a key, but some types may be sufficiently tightened by hand. The original forms of workholding on lathes were between-centers holding and ad hoc fastenings to the headstock spindle.

6. Strain wave gearing - Wikipedia

   en.wikipedia.org/wiki/Strain_Wave_Gearing

   The major axis of the flex spline's ellipse rotates with wave generator, so the points where the teeth mesh revolve around the center point at the same rate as the wave generator's shaft. The key to the design of the strain wave gear is that there are fewer teeth (often for example two fewer) on the flex spline than there are on the circular ...

7. Geislinger coupling - Wikipedia

   en.wikipedia.org/wiki/Geislinger_coupling

   The Geislinger coupling is an all-metal coupling for rotating shafts. It is elastic in torsion, allowing it to absorb torsional vibration. [1] Unlike some other coupling types, it is not intended to compensate for high radial misalignment between shafts, but it can compensate for axial misalignments better than elastomer couplings.