Though one may not think of gears as being flexible, gear couplings are very much considered to be a versatile coupling. A gear coupling is a mechanical device designed to transmit torque between two shafts that are not collinear. The coupling typically includes two versatile joints, one fixed to each shaft. These joints tend to be connected by a third shaft called the spindle.
Each joint generally consists of a 1:1 gear ratio internal/external equipment set. The tooth flanks and external diameter of the exterior equipment are crowned to permit for angular displacement between your two gears. Mechanically, the gears are equal to rotating splines with modified profiles. They are called gears because of the relatively huge size of one’s teeth. Gear couplings are usually limited by angular misalignments of 4 to 5°.
Gear couplings ordinarily come in two variations, flanged sleeve and continuous sleeve. Flanged equipment couplings consist of short sleeves surrounded by a perpendicular flange. One sleeve is positioned on each shaft therefore the two flanges line up face to encounter. A number of screws or bolts in the flanges hold them together. Continuous sleeve equipment couplings feature shaft ends coupled jointly and abutted against one another, which are then enveloped by a sleeve. Generally, these sleeves are constructed with metal, but they can also be made of Nylon.
Single joint gear couplings are accustomed to connect two nominally coaxial shafts. In this software the device is named a gear-type versatile, or versatile coupling. The single joint allows for minimal misalignments such as for example installation errors and adjustments in shaft alignment due to operating conditions. These types of gear couplings are usually limited by angular misalignments of 1/4 to 1/2°.
Gear couplings are torsionally rigid and so are supplied to two designs – completely flexible and flexible/rigid. A completely flexible coupling comprises two hubs with an external gear and two outer sleeves with an internal gear. It’s a common coupling for all sorts of applications and accommodates all feasible misalignments (angular, offset and combined) along with large axial moments. Devices, bearings, seals, and shafts are therefore not subjected to the additional forces, sometimes of substantial magnitude, which arise from unavoidable misalignment usually connected with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared half and one rigid fifty percent. It does not support parallel displacement of shafts but does support angular misalignment. This type of couplings are primarily used for “floating shaft” applications.
Sizes 010 – 070 all have crowned teeth with a 20° pressure contact. This 
enables to accommodate up to at least one 1,5° static angular misalignment per gear mesh. However, minimizing the operational misalignment will increase the life of the coupling and also the life of other machinery components such as bearings etc.
SERIES H Features & Benefits
Higher Misalignment Capability
Sizes 1-7 compensate for up to ±1 1/2° static angular misalignment per gear mesh.
Minimizing working misalignment will maximize the life of the coupling. Refer to the Installation and Alignment Guidelines for alignment recommendations.
Larger Bore Capabilities permit the most economical size selection for shafts up to 10 5/8″.
Higher Torque Ratings because of bigger tooth pitch diameters than various other couplings.
Versatility in that Series H’s are interchangeable by fifty percent coupling with competitive coupling designs.
1 1/2° Curved-Face Teeth certainly are a prime feature of the Series H coupling, sizes 1-7. The crowned hub teeth are a 20° full-depth involute tooth form with flank, tip, and root curvature. When
used with the straight confronted sleeve teeth, these 1 1/2° curved encounter hubs offer elevated shaft misalignment capability
CENTER FLANGE BOLTING
All couplings feature precision-drilled flange bolt holes, and tight tolerance Quality 5 flange bolts to make sure a long-lasting flange to flange and fastener fit. Exposed bolt flanges are
standard. Shrouded bolt flanges can be provided through size 5. Size #5 1/2 and bigger couplings are only obtainable with exposed bolt flanges.
LUBRICATION
Each sleeve flange is supplied with two pipe plugs 180° aside. This permits assembly of a complete flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal can be a Buna-N O-ring to greatly help retain grease and exclude contaminants. KHP or KSG coupling greases are recommended in order to obtain maximum operating life.
Ever-power COUPLING Features & Benefits
The Ever-power equipment coupling comes in two basic products:
Ever-powercoupling for moderate to heavy-duty applications
Sizes 1 1/2 through 7 with essential end ring.
Sizes 8 through 30 with bolt-on end ring.