Though one may not think of gears as being flexible, gear couplings are extremely much considered to be a versatile coupling. A equipment coupling is certainly a mechanical device made to transmit torque between two shafts that are not collinear. The coupling typically consists of two versatile joints, one set to each shaft. These joints tend to be connected by a third shaft known as the spindle.
Each joint generally includes a 1:1 equipment ratio internal/external gear set. The tooth flanks and external diameter of the external equipment are crowned to permit for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are known as gears because of the relatively large size of the teeth. Gear couplings are usually 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 surrounded by a perpendicular flange. One sleeve is placed on each shaft therefore the two flanges line up face to encounter. A number of screws or bolts in the flanges keep them collectively. Continuous sleeve equipment couplings feature shaft ends coupled collectively and abutted against each other, which are after that enveloped by a sleeve. Generally, these sleeves are constructed with metal, but they may also be made of Nylon.
Single joint equipment couplings are used to connect two nominally coaxial shafts. In this program the device is named a gear-type versatile, or flexible coupling. The solitary joint allows for minor misalignments such as installation errors and changes in shaft alignment due to operating conditions. These kinds of gear couplings are usually limited to angular misalignments of 1/4 to 1/2°.
Gear couplings are torsionally rigid and so are supplied to two styles – completely flexible and flexible/rigid. A totally flexible coupling comprises two hubs with an external gear and two outer sleeves with an interior gear. It’s a common coupling for a variety of applications and accommodates all possible misalignments (angular, offset and mixed) along with large axial moments. Devices, bearings, seals, and shafts are therefore not subjected to the excess forces, sometimes of significant magnitude, which occur from unavoidable misalignment usually associated with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared fifty percent and one rigid half. It does not accommodate parallel displacement of shafts but will accommodate angular misalignment. This kind of couplings are primarily used for “floating shaft” applications.
Sizes 010 – 070 all have crowned tooth with a 20° pressure contact. This enables to accommodate up to at least one 1,5° static angular misalignment per equipment mesh. However, reducing the operational misalignment will maximize the life span of the coupling along with the life of various 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 equipment mesh.
Minimizing working misalignment will maximize the life span of the coupling. Refer to the Installation and Alignment Instructions for alignment recommendations.
Larger Bore Capabilities permit the most economical size selection for shafts up to 10 5/8″.
Higher Torque Ratings due to bigger tooth pitch diameters than additional couplings.
Versatility in that Series H’s are interchangeable by half coupling with competitive coupling styles.
1 1/2° Curved-Face Teeth are a prime feature of the Series H coupling, sizes 1-7. The crowned hub teeth are a 20° full-depth involute tooth type with flank, suggestion, and root curvature. When
used with the straight confronted sleeve teeth, these 1 1/2° curved face hubs offer elevated shaft misalignment capability
CENTER FLANGE BOLTING
All couplings feature precision-drilled flange bolt holes, and tight tolerance Grade 5 flange bolts to assure a long-enduring flange to flange and fastener fit. Exposed bolt flanges are
standard. Shrouded bolt flanges can be supplied through size 5. Size #5 1/2 and larger couplings are only obtainable with uncovered bolt flanges.
LUBRICATION
Each sleeve flange is supplied with two pipe plugs 180° apart. This permits assembly of a full flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal can be a Buna-N O-ring to help retain grease and exclude contaminants. KHP or KSG coupling greases are suggested to be able to obtain maximum working life.
Ever-power COUPLING Features & Benefits
The Ever-power gear coupling is available 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.