Dalatec has teamed with several high-end gear manufactures to offer our customers both custom and off-the-shelf gears to meet their specific needs and applications!
Dalatec can source and supply numerous types of gears, such as:
in various materials, including:
Bevel gears are typically used when the direction of a shaft's rotation needs to be modified. They are usually mounted on shafts that are 90 degrees apart, but can be designed to work at varying angles.
Bevel gears typically have teeth that are either straight, spiral, or hypoid. Straight bevel gear teeth actually have the same problem as straight spur gear teeth -- as each tooth engages, it impacts the corresponding tooth at the same time.
Helical gears consist of teeth that are cut at an angle to the face of the gear. When two teeth on a helical gear system engage, the contact starts at one end of the tooth and gradually spreads as the gears rotate, until the two teeth are in full engagement.
This gradual engagement makes helical gears operate much more smoothly and quietly than spur gears.
Because of the angle of the teeth on helical gears, they create a thrust load on the gear when they mesh. Devices that use helical gears require bearings that can support this thrust load.
Spur gears are the most common type of gear. They consist of straight teeth, and are mounted on parallel shafts. Sometimes, many spur gears are used at once to create very large gear reductions. Spur gears are typically loud gears. Each time a gear tooth engages a tooth on another gear, the teeth collide, and this impact makes a noise. It also increases the stress on the gear teeth.
Worm gears are used when large gear reductions are required. Worm gears can typically have reductions of 20:1, and even up to 300:1 or greater. One unique quality typical of worm gears is that while the worm can easily drive the gear, the gear cannot turn the worm. This is due to the worm having such a shallow angle, when the gear tries to spin it, the friction between the gear and the worm holds the worm in place This is a useful feature in conveyor systems and similar machines, in which the locking feature can act as a brake for the conveyor when the motor is not turning.
Miter gears are a special type of bevel gears in which the shafts intersect at 90° and the gear ratio is 1:1.
Internal gears are simply spur gears turned "inside out". Unlike spur gears with external teeth, the teeth of an internal gear are located on the inside diameter of the gear, with a smooth outer diameter. Internal gears allow for the pinion to rotate inside of the gear, resulting in clean performance.
Gear racks convert rotary motion into linear motion when coupled with a spur gear running against it.