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  2. Spindle (tool) - Wikipedia

    en.wikipedia.org/wiki/Spindle_(tool)

    A main component of this spindle is the motor, stored internally. Internal Motor: limited power and torque due to restricted space within the spindle housing; Speed Range: 20,000 [3]-60,000 RPM [2] (top speed according to design) Advantage: high top speed expands application use; Disadvantage: sensitive life range according to use

  3. 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.

  4. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.

  5. Rotarod performance test - Wikipedia

    en.wikipedia.org/wiki/Rotarod_performance_test

    The length of time that a given animal stays on this rotating rod is a measure of their balance, coordination, physical condition, and motor-planning. The speed of the rotarod is mechanically driven, and may either be held constant, or accelerated. [3] A human analog to rotarod test might be treadmill running.

  6. Hard disk drive performance characteristics - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive...

    The spindle motor speed can use one of two types of disk rotation methods: 1) constant linear velocity (CLV), used mainly in optical storage, varies the rotational speed of the optical disc depending upon the position of the head, and 2) constant angular velocity (CAV), used in HDDs, standard FDDs, a few optical disc systems, and vinyl audio ...

  7. Grinding (abrasive cutting) - Wikipedia

    en.wikipedia.org/wiki/Grinding_(abrasive_cutting)

    Ultra-high speed grinding (UHSG) can run at speeds higher than 40,000 fpm (200 m/s), taking 41 s to remove 1 in 3 (16 cm 3) of material, but is still in the research-and-development (R&D) stage. It also requires high spindle power and high spindle speeds.

  8. Machine taper - Wikipedia

    en.wikipedia.org/wiki/Machine_taper

    HSK's hollow shank is deliberately thin and flexible, so it expands more than the spindle and tightens when rotating at high speed. Furthermore, the HSK holder is dual contact: It engages with the spindle on both the taper and the top of the flange which resists axial movement when thermal growth and/or centrifugal force of the spindle occurs.

  9. Dynamometer - Wikipedia

    en.wikipedia.org/wiki/Dynamometer

    A chassis dynamometer.. A dynamometer or "dyno" is a device for simultaneously measuring the torque and rotational speed of an engine, motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by the dynamometer itself as kW or bhp.