Though one may not think of gears as being flexible, gear couplings are very much regarded as a versatile coupling. A gear coupling can be a mechanical device made to transmit torque between two shafts that are not collinear. The coupling typically contains two flexible joints, one set to each shaft. These joints tend to be connected by a third shaft called the spindle.
Each joint generally consists of a 1:1 equipment ratio internal/external gear pair. The tooth flanks and external diameter of the external 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 due to the 
relatively huge size of one’s teeth. Gear couplings are usually limited by angular misalignments of 4 to 5°.
Gear couplings ordinarily come in two variations, flanged sleeve and continuous sleeve. Flanged equipment couplings consist of short sleeves surrounded by a perpendicular flange. One sleeve is positioned on each shaft therefore the two flanges fall into line face to face. A series of screws or bolts in the flanges hold them together. Continuous sleeve gear couplings feature shaft ends coupled together and abutted against one another, which are then 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 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 changes in shaft alignment due to operating conditions. These kinds of gear couplings are generally limited to 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 totally flexible coupling comprises two hubs with an exterior gear and two outer sleeves with an interior gear. It’s a common coupling for a variety of applications and accommodates all feasible misalignments (angular, offset and combined) and also large axial moments. Machines, bearings, seals, and shafts are therefore not subjected to the additional forces, sometimes of considerable 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 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 allows to accommodate up to 1 1,5° static angular misalignment per equipment mesh. However, reducing the operational misalignment will increase the life of the coupling and also 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 equipment mesh.
Minimizing working misalignment will increase the life of the coupling. Make reference to the Set up 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 because of bigger tooth pitch diameters than various other 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 certainly 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 in combination with the straight confronted sleeve teeth, these 1 1/2° curved encounter 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 make sure a long-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 larger couplings are only available with uncovered bolt flanges.
LUBRICATION
Each sleeve flange is supplied 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 certainly a Buna-N O-ring to greatly 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 equipment coupling comes in two basic product lines:
Ever-powercoupling for medium to heavy-duty applications
Sizes 1 1/2 through 7 with integral end ring.
Sizes 8 through 30 with bolt-on end ring.