Gearboxes and acceleration reducers are mechanical speed reduction equipment used in automation control systems.
Velocity reducers are mechanical devices generally used for just two purposes. The primary use can be to multiply the quantity of torque generated by an input power source to boost the amount of usable work. In addition they reduce the input power resource speed to attain desired output speeds.
Gearboxes are used to increase torque whilst reducing the rate of a prime mover result shaft (a engine crankshaft, for example). The result shaft of a gearbox rotates at a slower price than the input shaft, which reduction in quickness produces a mechanical benefit, raising torque. A gearbox can be set up to do the opposite and offer a rise in shaft velocity with a reduced amount of torque.
Enclosed-drive speed reducers, also referred to as gear drives and gearboxes, have two main configurations: in-line and right angle which use different types of gearing. In-line models are commonly made up of helical or spur gears, planetary gears, cycloidal mechanisms, or harmonic wave generators. Correct angle designs are usually made with worm gearing or bevel gearing, though hybrid drives are also 
offered. The type of application dictates which rate reducer style will best satisfy the requirements.
D- Drive is a variable velocity geared motor, robust stage less unit suitable for different industrial applications.The machine is designed to provide low output speed at corresponding high output torque. The drive unit is produced from standard components and consists of AC squirrel cage motor, variable acceleration drive and gearbox with case hardened profile surface helical gears. It can be quickly adapted to any machine Variable Speed Gearbox design. The unit is very compact and save time and money because they are prepared to fit drive modules. The interior part of the drive is the variable acceleration pulley enclosed in a casing and connected to the gearbox and engine. The speed variation can be achieved through a hand wheel. Average life to be likely is about a decade before main maintenance. Belt life would depend on software and environment. General encounter is about three to four 4 years life.
The Ring-cone is a mechanical adjustable speed drive employing a ring and cone friction power train – hence the name. The internal drive assembly consists of an input disc, a set of planetary cones, a control band, the cam disc and a pressure control cam. The Ring-cone has different sizes to handle engine power ranging between 1/4HP – 20HP, and nominal output torque ratings spanning 15 – 130,000 in-lbs. This unique drive provides a speed range of 0 – 800 RPM, and a cam mechanism that adjusts to the surroundings downstream and can withstand a certain quantity of shock load.
With a variable frequency drive, the output torque remains continuous from base speed right down to the lower limit, whatever it may be for the application. However, with the Ring-cone mechanical adjustable speed drive the result torque improves as the swiftness drops. At the reduced speed range, the result torque methods 500% of the engine rating providing large breakaway torque values. The mechanical drive is also able to handle a 200% overload capability throughout the whole speed range. This efficiency advantage allows the user to set a low speed that can help the drive package push through difficult areas.
For lower acceleration/higher torque applications, some Zero-Max drives can be found with our right angle gearbox. Some Zero-Max drives could be purchased with regular electric motors or they may be linked to any rotating power supply up to 2000 RPM. Adjustable speed drive acceleration adjustments are easily made by shifting a lever control through an arc or turning the hand-wheel of a screw type control. In either case, easy and specific speed control settings are feasible with Zero-Max adjustable acceleration drives – also described interchangeably as variable speed drives.