Though one may not think of gears to be flexible, gear couplings are extremely much considered to be a flexible coupling. A gear coupling is usually a mechanical device designed to transmit torque between two shafts that are not collinear. The coupling typically includes two versatile joints, one fixed to each shaft. These joints tend to be linked by a third shaft known as the spindle.
Each joint generally contains a 1:1 gear ratio internal/external gear set. The tooth flanks and external diameter of the exterior gear are crowned to allow for angular displacement between your two gears. Mechanically, the gears are equal to rotating splines with altered profiles. They are known as gears due to the relatively large size of one’s 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 brief sleeves surrounded by a perpendicular flange. One sleeve is placed on each shaft so the two flanges fall into line face to face. A series of screws or bolts in the flanges hold 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 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 program the device is named a gear-type flexible, or versatile coupling. The one joint allows for small misalignments such as for example installation errors and changes in shaft alignment due to operating conditions. These kinds of gear couplings are usually limited to angular misalignments of 1/4 to 1/2°.

Gear couplings are torsionally rigid and so are supplied to two styles – completely flexible and flexible/rigid. A completely versatile coupling comprises two hubs with an external gear and two outer sleeves with an internal gear. It’s a general coupling for a variety of applications and accommodates all feasible misalignments (angular, offset and mixed) as well as large axial moments. Machines, 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 fifty percent and one rigid fifty percent. It does not support parallel displacement of shafts but does support angular misalignment. This kind 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 1 1,5° static angular misalignment per gear mesh. However, reducing the operational misalignment will maximize the life span of the coupling along with the life of additional 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 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 larger tooth pitch diameters than additional couplings.
Versatility for the reason 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 are a 20° full-depth involute tooth type with flank, suggestion, 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-enduring flange to flange and fastener fit. Exposed bolt flanges are
regular. Shrouded bolt flanges can be provided through size 5. Size #5 1/2 and larger couplings are only available with exposed bolt flanges.

LUBRICATION
Each sleeve flange is supplied with two pipe plugs 180° apart. This permits assembly of a full flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal is definitely 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 working life.

Ever-power COUPLING Features & Benefits

The Ever-power gear coupling is available 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 band.