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  2. Pallet fork - Wikipedia

    en.wikipedia.org/wiki/Pallet_fork

    Pallet fork with jewel pallets (pink) The pallet fork is above the balance wheel in this watch movement. The pallet fork is a component of the lever escapement of a mechanical watch. [1] The pallet fork and the lever form one component that sits between the escape wheel and the balance wheel. Its purpose is to lock the escape wheel, and release ...

  3. Peg wood - Wikipedia

    en.wikipedia.org/wiki/Peg_wood

    A peg wood (also pegwood) is a cleaning tool used in watchmaking [1] to clean pivot and other small holes. Pegwood is made from a specially selected orangewood that has been dried and sheds very little. A peg wood consists of a thin piece or dowel of wood that the user shapes to be pointed.

  4. Chinese standard movement - Wikipedia

    en.wikipedia.org/wiki/Chinese_standard_movement

    Once the most commonly produced mechanical/automatic watch movements in China, the numbers produced and their quality (at least for a majority of produced movements) have since declined significantly; today the movement lives on typically in simple (even crude) automatic and skeletonized (i.e. using hollowed-out parts and segments such that the ...

  5. Movement (clockwork) - Wikipedia

    en.wikipedia.org/wiki/Movement_(clockwork)

    All the parts of the watch were mounted between the two plates except the balance wheel, which was mounted on the outside of the back plate, held by a bracket called the balance cock. Three-quarter plate movement In the 18th century, to make movements thinner, part of the back plate was cut away to make room for the balance and balance cock.

  6. Jewel bearing - Wikipedia

    en.wikipedia.org/wiki/Jewel_bearing

    Ruby jewel bearings used for a balance wheel in a mechanical watch movement Cross-section of a jewel bearing in a mechanical watch. This type of donut-shaped bearing (red) is called a hole jewel, used for most of the ordinary wheels in the gear train. It is usually made of synthetic sapphire or ruby, press-fit into a hole in the movement's ...

  7. Spare part - Wikipedia

    en.wikipedia.org/wiki/Spare_part

    A spare part, spare, service part, repair part, or replacement part, is an interchangeable part that is kept in an inventory and used for the repair or refurbishment of defective equipment/units. Spare parts are an important feature of logistics engineering and supply chain management , often comprising dedicated spare parts management systems.

  8. List of ETA Movements - Wikipedia

    en.wikipedia.org/wiki/List_of_ETA_Movements

    4 42 2824-2 [9] Mecaline automatic 25.6 4.6 25 28800 4 38 2826-2 [10] Mecaline automatic 25.6 6.2 25 28800 4 38 2836-2 [11] Mecaline automatic 25.6 5.05 25 28800 4 38 2892-A2 [12] Mecaline Specialities automatic 25.6 3.6 21 28800 4 42 2893-1 [13] Mecaline Specialities automatic 25.6 4.1 21 28800 4 42 2893-2 [14] Mecaline Specialities automatic ...

  9. Lever escapement - Wikipedia

    en.wikipedia.org/wiki/Lever_escapement

    A typical watch lever escapement beats at 18,000 or more beats per hour. Each beat gives the balance wheel an impulse, so there are two impulses per cycle. Despite being locked at rest most of the time, the escape wheel rotates typically at an average of 10 rpm or more. The origin of the "tick tock" sound is caused by this escapement mechanism.

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