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2. List of gear nomenclature - Wikipedia

   en.wikipedia.org/wiki/List_of_gear_nomenclature

   Shaft angle. A shaft angle is the angle between the axes of two non-parallel gear shafts. In a pair of crossed helical gears, the shaft angle lies between the oppositely rotating portions of two shafts. This applies also in the case of worm gearing. In bevel gears, the shaft angle is the sum of the two

3. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   Hardness comparison table. Brinell HB (10 mm Ball, 3000 kg load) Vickers HV ... Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C) Struers hardness ...

4. Comparison of hub gears - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_hub_gears

   Brand Model Introduced Discontinued Speeds (external) Gear width (with external) Ebike Max Power Max Torque Direct Drive Weight (excluding auxiliary components)

5. Campbell diagram - Wikipedia

   en.wikipedia.org/wiki/Campbell_diagram

   Another critical speed at mode 4 is observed at 7810 rpm (130 Hz) in dangerous vicinity of nominal shaft speed, but it has 30% damping - enough to safely ignore it. Analytically computed values of eigenfrequencies as a function of the shaft's rotation speed. This case is also called "whirl speed map". [4] Such a chart can be used in turbine design.

6. Shaft (mechanical engineering) - Wikipedia

   en.wikipedia.org/wiki/Shaft_(mechanical_engineering)

   The following stresses are induced in the shafts. Shear stresses due to the transmission of torque (due to torsional load). Bending stresses (tensile or compressive) due to the forces acting upon the machine elements like gears and pulleys as well as the self weight of the shaft. Stresses due to combined torsional and bending loads.

7. Drive shaft - Wikipedia

   en.wikipedia.org/wiki/Drive_shaft

   A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power, torque, and rotation, usually used to connect other components of a drivetrain that cannot be connected directly because of distance or the need to ...