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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. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    A slower feed rate usually results in a finer surface as more cuts are made for any length of wood. Spindle speed becomes important in the operation of routers, spindle moulders or shapers, and drills. Older and smaller routers often rotate at a fixed spindle speed, usually between 20,000 and 25,000 rpm.

  4. 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.

  5. Machine taper - Wikipedia

    en.wikipedia.org/wiki/Machine_taper

    Steep tapers (e.g., NMTB and derivatives) tend to lose rigidity and accuracy at high speed, as their solid shanks are stiffer than the spindles they fit into. Under high centrifugal force, the spindle expands more than the toolholder which changes the overall length: That is, as the spindle spreads outward, the toolholder tends to move deeper ...

  6. Gross Motor Function Classification System - Wikipedia

    en.wikipedia.org/wiki/Gross_Motor_Function...

    The Gross Motor Function Classification System or GMFCS is a 5 level clinical classification system that describes the gross motor function of people with cerebral palsy on the basis of self-initiated movement abilities. Particular emphasis in creating and maintaining the GMFCS scale rests on evaluating sitting, walking, and wheeled mobility.

  7. 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 ...

  8. Glossary of mechanical engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mechanical...

    Alternatively, ISO defines [10] accuracy as describing a combination of both random and systematic observational error, so high accuracy requires both high precision and high trueness. Ackermann steering geometry – a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the ...

  9. Test functions for optimization - Wikipedia

    en.wikipedia.org/wiki/Test_functions_for...

    The test functions used to evaluate the algorithms for MOP were taken from Deb, [4] Binh et al. [5] and Binh. [6] The software developed by Deb can be downloaded, [ 7 ] which implements the NSGA-II procedure with GAs, or the program posted on Internet, [ 8 ] which implements the NSGA-II procedure with ES.