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.
![Radlager Satz Radlagersatz MAXGEAR 2822/MG 33-0129](https://m.bearing-wholesalers.com/uploaded_images/d2016865-radlager-satz-radlagersatz-maxgear-2822-mg-33-0129.jpg)
- Radlager Satz Radlagersatz MAXGEAR 2822/MG 33-0129
- 1 pcs
- Negotiable
![FAG 713 6441 00 Radlagersatz](https://m.bearing-wholesalers.com/uploaded_images/d2016864-fag-713-6441-00-radlagersatz.jpg)
- FAG 713 6441 00 Radlagersatz
- 1 pcs
- Negotiable
![2x Radlagersatz 2 Radlagersätze VKBA3599](https://m.bearing-wholesalers.com/uploaded_images/d2016861-2x-radlagersatz-2-radlagers-tze-vkba3599.jpg)
- 2x Radlagersatz 2 Radlagersätze VKBA3599
- 1 pcs
- Negotiable
![Radlager Satz Radlagersatz NK 753930](https://m.bearing-wholesalers.com/uploaded_images/d2016861-radlager-satz-radlagersatz-nk-753930.jpg)
- Radlager Satz Radlagersatz NK 753930
- 1 pcs
- Negotiable
![Radlager Satz Radlagersatz Vorn Vorderachse CHRYSLER 33-0043](https://m.bearing-wholesalers.com/uploaded_images/d2016864-radlager-satz-radlagersatz-vorn-vorderachse-chrysler-33-0043.jpg)
- Radlager Satz Radlagersatz Vorn Vorderachse CHRYSLER 33-0043
- 1 pcs
- Negotiable
![835000 VALEO OE QUALITY CLUTCH KIT SET](https://m.bearing-wholesalers.com/uploaded_images/d2016865-835000-valeo-oe-quality-clutch-kit-set.jpg)
- 835000 VALEO OE QUALITY CLUTCH KIT SET
- 1 pcs
- Negotiable
![USED PENN SPINNING REEL PART - Silverado SV4000 - Main Gear Bearings](https://m.bearing-wholesalers.com/uploaded_images/d2016861-used-penn-spinning-reel-part-silverado-sv4000-main-gear-bearings.jpg)
- USED PENN SPINNING REEL PART - Silverado SV4000 - Main Gear Bearings
- 1 pcs
- Negotiable
![2x Radlagersatz 2 Radlagersätze FAG 713623620](https://m.bearing-wholesalers.com/uploaded_images/d2016861-2x-radlagersatz-2-radlagers-tze-fag-713623620.jpg)
- 2x Radlagersatz 2 Radlagersätze FAG 713623620
- 1 pcs
- Negotiable
![Radlager Satz Radlagersatz VKBA7440](https://m.bearing-wholesalers.com/uploaded_images/d2016862-radlager-satz-radlagersatz-vkba7440.jpg)
- Radlager Satz Radlagersatz VKBA7440
- 1 pcs
- Negotiable