Though one may not think of gears to be versatile, gear couplings are very much considered to be a flexible coupling. A equipment coupling can be a mechanical device designed to transmit torque between two shafts that are not collinear. The coupling typically contains two flexible joints, one fixed to each shaft. These joints tend to be connected by a third shaft known as the spindle.
Each joint generally consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and external diameter of the exterior equipment are crowned to allow for angular displacement between your two gears. Mechanically, the gears are equal to rotating splines with modified profiles. They are called gears because of the relatively huge size of the 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 so the two flanges line up face to face. A number of screws or bolts in the flanges hold them collectively. Continuous sleeve equipment couplings feature shaft ends coupled together and abutted against each other, which are after that enveloped by a sleeve. Generally, these sleeves are made of metal, but they may also be made of Nylon.
Single joint gear couplings are accustomed to connect two nominally coaxial shafts. In this program the device is called a gear-type versatile, or flexible coupling. The single joint allows for small misalignments such as installation errors and changes in shaft alignment due to 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 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) along with large axial moments. Devices, bearings, seals, and shafts are therefore not subjected to the excess forces, sometimes of substantial magnitude, which occur 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 accommodate parallel displacement of shafts but does accommodate angular misalignment. This type of couplings are primarily utilized for “floating shaft” applications.
Sizes 010 – 070 all have crowned teeth with a 20° pressure contact. This allows to accommodate up to at least one 1,5° static angular misalignment per equipment mesh. However, reducing the operational misalignment will maximize the life of the coupling and also the life of various other machinery components such as for example bearings etc.
SERIES H Features & Benefits
Higher Misalignment Capability
Sizes 1-7 compensate for ±1 1/2° static angular misalignment per equipment mesh.
Minimizing operating misalignment will maximize 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 due to larger tooth pitch diameters than 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 are a primary 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 with the straight faced sleeve teeth, these 1 1/2° curved face 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 make sure a 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 larger couplings are only obtainable with exposed 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 usually 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 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.