Gear
A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source. Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape.Two or more meshing gears, working in a sequence, are called a gear train or a transmission. A gear can mesh with a linear toothed part, called a rack, thereby producing translation instead of rotation.
The gears in a transmission are analogous to the wheels in a crossed, belt pulley system. An advantage of gears is that the teeth of a gear prevent slippage.
When two gears mesh, if one gear is bigger than the other, a mechanical advantage is produced, with the rotational speeds, and the torques, of the two gears differing in proportion to their diameters.
In transmissions with multiple gear ratios—such as bicycles, motorcycles, and cars—the term "gear" as in "first gear" refers to a gear ratio rather than an actual physical gear. The term describes similar devices, even when the gear ratio is continuous rather than discrete, or when the device does not actually contain gears, as in a continuously variable transmission.
![621133109 LUK OE QUALITY CLUTCH KIT SET](https://m.bearing-wholesalers.com/uploaded_images/d2016861-621133109-luk-oe-quality-clutch-kit-set.jpg)
- 621133109 LUK OE QUALITY CLUTCH KIT SET
- 1 pcs
- Negotiable
![514000310 LUK OE QUALITY CLUTCH KIT SET](https://m.bearing-wholesalers.com/uploaded_images/d2016862-514000310-luk-oe-quality-clutch-kit-set.jpg)
- 514000310 LUK OE QUALITY CLUTCH KIT SET
- 1 pcs
- Negotiable
![ORIGINAL RENAULT PK5 gearbox selector arm 8200861525](https://m.bearing-wholesalers.com/uploaded_images/d2016864-original-renault-pk5-gearbox-selector-arm-8200861525.jpg)
- ORIGINAL RENAULT PK5 gearbox selector arm 8200861525
- 1 pcs
- Negotiable
![Radlager Satz Radlagersatz MAXGEAR 4709/MG 33-0079](https://m.bearing-wholesalers.com/uploaded_images/d2016862-radlager-satz-radlagersatz-maxgear-4709-mg-33-0079.jpg)
- Radlager Satz Radlagersatz MAXGEAR 4709/MG 33-0079
- 1 pcs
- Negotiable
![Radnabe SATZ OPEL ASTRA H ZAFIRA B - incl. ABS-Sensor und](https://m.bearing-wholesalers.com/uploaded_images/d2016865-radnabe-satz-opel-astra-h-zafira-b-incl-abs-sensor-und.jpg)
- Radnabe SATZ OPEL ASTRA H ZAFIRA B - incl. ABS-Sensor und
- 1 pcs
- Negotiable
![Caged Roller Bearing AX15, 3rd gear Jeep Wrangler YJ 1988/1995](https://m.bearing-wholesalers.com/uploaded_images/d2016861-caged-roller-bearing-ax15-3rd-gear-jeep-wrangler-yj-1988-1995.jpg)
- Caged Roller Bearing AX15, 3rd gear Jeep Wrangler YJ 1988/1995
- 1 pcs
- Negotiable
![Riemenspanner Zahnriemen Spanner BLUE PRINT ADK87604](https://m.bearing-wholesalers.com/uploaded_images/d2016862-riemenspanner-zahnriemen-spanner-blue-print-adk87604.jpg)
- Riemenspanner Zahnriemen Spanner BLUE PRINT ADK87604
- 1 pcs
- Negotiable
![Spannrolle für Zahnriemen FEBI BILSTEIN 09762](https://m.bearing-wholesalers.com/uploaded_images/d2016864-spannrolle-f-r-zahnriemen-febi-bilstein-09762.jpg)
- Spannrolle für Zahnriemen FEBI BILSTEIN 09762
- 1 pcs
- Negotiable