Gear Coupling

Though one may not think of gears to be versatile, gear couplings are extremely much considered to be a versatile coupling. A gear coupling is a mechanical device made to transmit torque between two shafts that aren’t collinear. The coupling typically consists of two versatile joints, one fixed to each shaft. These joints tend to be connected by a third shaft called the spindle.
Each joint generally contains 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 altered profiles. They are called gears because of the relatively huge size of one’s teeth. Gear couplings are usually limited to angular misalignments of 4 to 5°.
Gear couplings ordinarily can be found in two variations, flanged sleeve and continuous sleeve. Flanged gear 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 face. A series of screws or bolts in the flanges keep them collectively. Continuous sleeve equipment couplings feature shaft ends coupled collectively and abutted against one another, which are then enveloped by a sleeve. Generally, these sleeves are made from metal, but they may 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 solitary joint allows for minor misalignments such as for example installation errors and changes in shaft alignment due to operating conditions. These kinds of gear couplings are usually limited by angular misalignments of 1/4 to 1/2°.

Gear couplings are torsionally rigid and 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 mixed) as well as large axial moments. Devices, bearings, seals, and shafts are therefore not put through the excess forces, sometimes of substantial magnitude, which occur from unavoidable misalignment usually connected with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared fifty percent and one rigid fifty percent. 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 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 along with the life of other machinery components such as bearings etc.

SERIES H Features & Benefits

Higher Misalignment Capability
Sizes 1-7 compensate for ±1 1/2° static angular misalignment per gear mesh.
Minimizing operating misalignment will maximize the life of the coupling. Refer 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 bigger 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 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, tip, and root curvature. When
used with the straight faced 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 Grade 5 flange bolts to assure a long-long lasting 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 bigger couplings are only available with uncovered bolt flanges.

LUBRICATION
Each sleeve flange comes with two pipe plugs 180° apart. This permits assembly of a complete flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal is usually 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 is available in two basic products:

Ever-powercoupling for medium to heavy-duty applications
Sizes 1 1/2 through 7 with essential end ring.
Sizes 8 through 30 with bolt-on end ring.