Gear Coupling

Though one might not think of gears as being flexible, gear couplings are very much considered to be a versatile coupling. A equipment coupling is a mechanical device made to transmit torque between two shafts that aren’t collinear. The coupling typically consists of two flexible joints, one set to each shaft. These joints tend to be linked by a third shaft called the spindle.
Each joint generally contains a 1:1 gear ratio internal/external gear set. The tooth flanks and external diameter of the exterior equipment 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 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 encircled by a perpendicular flange. One sleeve is positioned on each shaft so the two flanges line up face to face. A number of screws or bolts in the flanges keep them together. Continuous sleeve gear couplings feature shaft ends coupled jointly and abutted against each other, which are then enveloped by a sleeve. Generally, these sleeves are made from metal, but they can also be made of Nylon.
Single joint equipment couplings are used to connect two nominally coaxial shafts. In this application the device is called a gear-type flexible, or versatile coupling. The one joint allows for minimal misalignments such as for example installation errors and adjustments 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 completely flexible coupling comprises two hubs with an external gear and two external sleeves with an internal gear. It’s a universal coupling for a variety of applications and accommodates all feasible misalignments (angular, offset and combined) and also large axial moments. Devices, bearings, seals, and shafts are therefore not put through the excess forces, sometimes of considerable magnitude, which arise from unavoidable misalignment usually associated with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared half and one rigid half. It does not support 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 teeth with a 20° pressure contact. This enables to accommodate up to 1 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 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 gear mesh.
Minimizing working misalignment will increase the life span of the coupling. Make reference to the Installation and Alignment Instructions for alignment recommendations.
Larger Bore Capabilities allow the most economical size selection for shafts up to 10 5/8″.
Higher Torque Ratings because of bigger tooth pitch diameters than additional couplings.
Versatility for the reason that Series H’s are interchangeable by fifty percent coupling with competitive coupling designs.
1 1/2° Curved-Face Teeth 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, tip, and root curvature. When
used with the straight confronted sleeve teeth, these 1 1/2° curved encounter hubs offer improved shaft misalignment capability
CENTER FLANGE BOLTING
All couplings feature precision-drilled flange bolt holes, and tight tolerance Quality 5 flange bolts to assure a long-lasting flange to flange and fastener fit. Exposed bolt flanges are
regular. Shrouded bolt flanges could be supplied through size 5. Size #5 1/2 and bigger couplings are only obtainable with exposed bolt flanges.

LUBRICATION
Each sleeve flange comes 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 help retain grease and exclude contaminants. KHP or KSG coupling greases are recommended to be able to obtain maximum operating life.

Ever-power COUPLING Features & Benefits

The Ever-power gear coupling comes in two basic product lines:

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.

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