Gear drives are the most durable, rugged, and efficient of all adjustable-speed drives, but they are capable of providing only a specific number of fixed gear ratios. They are normally chosen for applications involving heavy loads or requiring long, trouble-free life. Generally, gear drives are more expensive than belt or chain drives.  A special type of gear drives, differentials, is a set of gears with three independent, rotating members with a speed and torque relationship to each other.  Differential efficiency is a function of the relative speed of the three elements. As relative speeds increase, the inherent losses due to basic gear efficiency, seals, and bearings also increase; thus, efficiency decreases.


Products & Services
Variable Transmissions
Variable transmissions are used in industrial applications to alter the speed of an output shaft.
Vacuum Cleaners
Vacuum cleaners are capable of picking up large quantities of material and/or liquids. They can be portable devices or part of a central vacuum system.
Mechanical Vacuum Pumps and Systems
Mechanical vacuum pumps and systems contain devices such as pistons, claws, scrolling spirals, and diaphragms to isolate and compress air.
High Vacuum Pumps
High and ultrahigh vacuum pumps operate efficiently in the high vacuum region and develop molecular flow for highly evacuated systems.

Product Announcements
Nederman - Explosion Proof Dust Collector
ATEX approved air powered industrial vacuum cleaner handles potentially explosive dusts such as composites & chemicals. This verstile cleaner can be equipped with absolute/HEPA filters for suction... (read more)
Ametek Precision Motion Control – Dynamic Fluid Solutions - Boost Natural Gas w/Magnetic Drive Regen. Blowers
Rotron® "MD 101" magnetic-drive regenerative blowers are designed to boost natural gas in furnaces for manufacturing operations. (read more)
Gardner Denver S.r.l.-Division Robuschi - For the suction of dusts and/or liquids
Mobile units for the suction of dusts and/or liquids Vacuum blower unit: TRB-DV... (read more)
Pumptec Inc. - Heavy-duty Custom Arimitsu Triplex Plunger Pumps
Arimitsu provides proven, industry leading plunger pumps for a variety of applications including Carwash, Industrial, Misting and Carpet / Upholstery Cleaning. With lower energy consumption pumps that... (read more)
EXAIR Corporation - Heavy Duty Dry Vacuum For 110 Gallon Drums
EXAIR’s new 110 Gallon Premium Heavy Duty Dry Vac™ System is a rugged, industrial duty vacuum cleaner that has been engineered to rapidly vacuum high volumes of dry material. The higher... (read more)
Fisher-Klosterman - Parts for most manufacturers of APC equipment.
The Parts and Services organization of Fisher Klosterman offer a wide range of replacement parts for most manufacturers of APC equipment. (read more)
Oil-Rite Corp. - PurgeX Infrared Sensing Lubrication Systems
PurgeX Infrared technology is excellent for any application requiring precise lubrication, and is especially suitable for high speed applications. (read more)
Oil-Rite Corp. - "Ready to Go" Complete Lubrication Systems
A NEW series of precision lubrication systems are now available through Oil-Rite Corporation. The Six Pack system provides simplicity and convenience in one easy to use package. It is truly "ready to... (read more)

Topics of Interest

Wobble pumps combine the best features of piston and diaphragm air pumps. Wobble pumps are available in a wide range of sizes. The Model 8003 from Rietschle Thomas weighs less than 7 oz, is rated at...

In principle, industrial vacuum pumps are merely compressors run with the inlet attached to the vacuum system and the outlet open to exhaust. In smaller sizes, compressors and vacuum pumps are often...

The demand for a reliable vacuum source has led to several different vacuum pump solutions. Many large industrial and academic labs traditionally use a centrally located house vacuum system. House...

10-1 General Considerations Steam turbines have replaced steam engines in many applications in power plant services, for driving centrifugal pumps, for driving generators in electric power stations,...

Chapter written by Andr MIGEON and Anne-Elisabeth LENEL. 1.1. Introduction Together with temperature, pressure is one of the most important physical quantities in our environment. Pressure is a...

Product Announcements
Yaskawa America, Inc. - Drives Division
SSD Drives, a Division of Parker Hannifin Corp.
Baldor Electric Company