Though one might not think of gears as being versatile, gear couplings are very much considered to be a flexible coupling. A gear coupling can be a mechanical device designed to transmit torque between two shafts that aren’t collinear. The coupling typically includes two flexible joints, one fixed to each shaft. These joints are often connected by a third shaft called the spindle.
Each joint generally includes a 1:1 equipment ratio internal/external gear pair. The tooth flanks and external diameter of the exterior gear are crowned to permit for angular displacement between your two gears. Mechanically, the gears are equivalent to rotating splines with altered profiles. They are called gears due to the relatively huge size of the teeth. Gear couplings are generally limited to angular misalignments of 4 to 5°.
Gear couplings ordinarily come in two variations, flanged sleeve and continuous sleeve. Flanged gear couplings consist of short sleeves encircled by a perpendicular flange. One sleeve is placed on each shaft therefore the two flanges fall into line 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 made of metal, but they may also be made of Nylon.
Single joint equipment couplings are used to connect two nominally coaxial shafts. In this software the device is called a gear-type versatile, or versatile coupling. The single joint allows for small misalignments such as installation errors and changes in shaft alignment because of operating conditions. These types of gear couplings are generally limited to 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 totally flexible coupling comprises two hubs with an exterior gear and two external sleeves with an internal gear. It’s a common coupling for a variety of applications and accommodates all possible misalignments (angular, offset and mixed) in addition to large axial moments. Machines, bearings, seals, and shafts are therefore not subjected to the excess 
forces, sometimes of significant magnitude, which occur from unavoidable misalignment usually connected with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared half and one rigid half. It does not accommodate parallel displacement of shafts but will support angular misalignment. This kind of couplings are primarily utilized for “floating shaft” applications.
Sizes 010 – 070 all have crowned tooth with a 20° pressure contact. This enables to accommodate up to 1 1,5° static angular misalignment per equipment mesh. However, minimizing the operational misalignment will maximize the life of the coupling and also the life of various other machinery components such as for example bearings etc.
SERIES H Features & Benefits
Higher Misalignment Capability
Sizes 1-7 compensate for up to ±1 1/2° static angular misalignment per equipment mesh.
Minimizing working misalignment will maximize the life of the coupling. Refer to the Set up and Alignment Guidelines for alignment recommendations.
Larger Bore Capabilities allow the most economical size selection for shafts up to 10 5/8″.
Higher Torque Ratings due to bigger tooth pitch diameters than 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 primary feature of the Series H coupling, sizes 1-7. The crowned hub teeth certainly are a 20° full-depth involute tooth type with flank, suggestion, and root curvature. When
used in combination with the straight confronted sleeve teeth, these 1 1/2° curved encounter hubs offer increased 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
regular. Shrouded bolt flanges could be provided through size 5. Size #5 1/2 and larger 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 is a Buna-N O-ring to greatly help retain grease and exclude contaminants. KHP or KSG coupling greases are suggested 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 integral end ring.
Sizes 8 through 30 with bolt-on end ring.