Though one might not think of gears to be flexible, gear couplings are very much considered to be a versatile coupling. A gear coupling is normally a mechanical device designed to transmit torque between two shafts that aren’t collinear. The coupling typically contains two flexible joints, one fixed to each shaft. These joints are often linked by a third shaft known as the spindle.
Each joint generally contains a 1:1 equipment ratio internal/external equipment set. The tooth flanks and outer diameter of the exterior gear are crowned to permit for angular displacement between the two gears. Mechanically, the gears are equal to rotating splines with altered profiles. They are known as gears due to the relatively large size of one’s teeth. Gear couplings are generally limited by angular misalignments of 4 to 5°.
Gear couplings ordinarily can be found in two variations, flanged sleeve and continuous sleeve. Flanged equipment couplings consist of short sleeves encircled 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 keep them collectively. Continuous sleeve equipment couplings feature shaft ends coupled together and abutted against one another, which are after that enveloped by a sleeve. Generally, these sleeves are made from metal, but they may also be made of Nylon.
Single joint equipment couplings are accustomed to connect two nominally coaxial shafts. In this application the device is named a gear-type versatile, or versatile coupling. The single joint allows for minimal misalignments such as installation errors and adjustments in shaft alignment due to operating conditions. These types of gear couplings are generally limited by angular misalignments of 1/4 to 1/2°.
Gear couplings are torsionally rigid and are supplied to two styles – completely flexible and flexible/rigid. A completely flexible coupling comprises two hubs with an external gear and two external sleeves with an internal gear. It’s a general coupling for a variety of applications and accommodates all possible misalignments (angular, offset and mixed) along with large axial moments. Machines, bearings, seals, and shafts are therefore not put through the additional 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 does 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 1 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 additional 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. Make reference to the Installation 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 because of larger tooth pitch diameters than various other couplings.
Versatility in that Series H’s are interchangeable by half 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 certainly are a 20° full-depth involute tooth form 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-long lasting flange to flange and 
fastener fit. Exposed bolt flanges are
regular. Shrouded bolt flanges can be supplied through size 5. Size #5 1/2 and bigger couplings are only obtainable with uncovered bolt flanges.
LUBRICATION
Each sleeve flange comes with two pipe plugs 180° aside. This permits assembly of a full flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal is normally 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 is available in two basic product lines:
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.