[INQ. NO. 1801M01] Youngjin Precision Industrial’s synchronizer ring is mounted in a car’s manual transmission. In order to distribute appropriate power according to vehicle speed, each gear stage has a different gear ratio composed of different gears. The gears of each stage have different sizes with a different number of teeth, which allow the gears at each stage to rotate at different speeds even when driving the vehicle at a constant speed.
To create the optimal driving conditions, two different gears with different gear ratios have to connect to each other, and this is defined as gearshift. If there is a manual transmission without a synchronizer ring, gearshift can only be performed at a certain speed ratio (speed) that makes two different gears combine (e.g. gearshift to 2nd gear at 20km, 3rd gear at 40km, and so forth).
In order to remove this discomfort, a synchronizer ring was developed and it allows two different gears with different RPM to have the same RPM when the gear is being shifted. With this help of a synchronizer ring, automobiles nowadays can easily perform a gearshift at any given speed ratio.

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large size mold & die production so that it is able to set various sizes of work material. Magazines are available in various specifications, which enables configuration of magazine options according to tool specification.


used in the process to inject cooling water to chill the heated molds. Aluminum melts at 660°C, which means that the repeated casting process keeps the molds heated at high temperature, and may hinder separation of the components from the molds. The cooler is needed to ease the separation process by injecting water into the molds to cool them down, thus decreasing the defect rate, enhancing productivity, and prolonging the durability of the molds.
compared to other types of chrome plating.
Warranties for battery, drive motor and inverter last for up to 7 years or 150,000 km. Power Plaza provides lifetime service for EV components such as OBC, PDU, LDC, BMS, dashboard module, etc.
continuously without jamming in the sorting process.
The operation or elapsed time can be checked easily by adoption of large LCD display, record of oxidation-reduction potential at titration, process display by LED, etc. In addition, maintenance/ repairing inspection is easy owing to the structure that can allow one to see the inside of the reactor while performing automatic calibration operation, automatic cleaning operation, and manual operation.

