Though one may not think of gears to be versatile, gear couplings are extremely much regarded as a versatile coupling. A gear coupling is certainly 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 connected by a third shaft called the spindle.
Each joint generally consists of a 1:1 gear ratio internal/external equipment pair. The tooth flanks and outer diameter of the external gear are crowned to permit for angular displacement between your two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of one’s teeth. Gear couplings are generally 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 surrounded 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 together. Continuous sleeve gear couplings feature shaft ends coupled together and abutted against each other, which are after that enveloped by a sleeve. Generally, these sleeves are constructed with metal, but they may also be made of Nylon.
Single joint gear couplings are used to connect two nominally coaxial shafts. In this application the device is named a gear-type flexible, or flexible coupling. The solitary joint allows for small misalignments such as installation errors and changes in shaft alignment because of 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 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 all sorts of applications and accommodates all possible misalignments (angular, offset and combined) as well as large axial moments. Devices, bearings, seals, and shafts are therefore not subjected to the excess forces, sometimes of significant magnitude, which arise 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 support angular misalignment. This type 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 equipment mesh. However, minimizing the operational misalignment will increase the life span 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 up to ±1 1/2° static angular misalignment per gear mesh.
Minimizing working misalignment will increase the life span of the coupling. Refer to the Set up 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 additional couplings.
Versatility for the reason that Series H’s are interchangeable by fifty percent coupling with competitive coupling styles.
1 1/2° Curved-Face Teeth certainly 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 confronted sleeve teeth, these 1 1/2° curved face 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-enduring flange to flange and fastener fit. Exposed bolt flanges are
standard. Shrouded bolt flanges can be provided 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 can be a Buna-N O-ring to 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 gear 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 band.