Gearheads

HDI Assembly

Materials:
Circular splines: low carbon steel/phosphate coated. Adjusting ring: low carbon steel/black oxide coated.

Lubrication:
The unit is factory lubricated and will not require further maintenance under normal conditions. Nevertheless, periodic maintenance should be performed when unit is subject to frequent adjustment, dirty or other abnormal conditions, or when unit-adjusting torque becomes higher than normal.

Disassembly:
Loosen friction adjustment/locking screw (it is not necessary to remove screw from unit) and remove one retaining ring. All parts will then slide out in one direction. (Do not tamper with or remove the two factory alignment screws.)

Clean parts and relubricate with multipurpose EP-2 grease.

Reassembly:
Assemble units with one 'D' and one 'S' hub (each is stamped). Unit will not phase adjust with two 'S' splines or two 'D' splines.

Operation:
Hand rotate the adjusting ring in either direction to produce a 100:1 reduction between the ring and one of the hubs. Adjust the friction adjustment/locking screw to desired resistance. For some applications, one adjustment will be sufficient for both shaft turning and phase adjusting modes. For more sever loading, such as hard stopping or higher torques, the friction adjustment/locking screw may be used to lock the adjusting ring in place to maintain phase.

Installation

In-Line Shaft
1. The hubs per Fig. 1 are attached to the driving and driven shafts by pin or key/setscrew at the designer's option.
2. In order to properly align shafts concentric to one another, either the driven or driving shaft should pass completely through one hub and engage the other by an amount determined by the "L" dimension. The hubs are symmetrical; therefore, the "L" length applies to a piloting shaft length entering from either hub face.
3. The coupling is designed to transmit pure torque only. Radial reaction loads generated by gears, sprockets, shaft misalignment, etc., must be isolated from the unit by appropriate shaft bearing supports. When it is not possible to maintain good shaft concentricity, it is recommended that the Infinit-Indexer® be mounted in conjunction with a flexible coupling and adapter as noted in Fig. 2.

Parallel Shaft
1. One hub is connected to the shaft by either pin or key/setscrew at the designer's option per Fig. 3.
2. Connection of a gear, sprocket, etc., is by means of a tapped hole hub.
3. The shaft should pass completely through the attached sprocket, gear, etc., and the Infinit-Indexer® at a uniform diameter with a tight running fit.

Applications

Adjustment
One revolution of the knurled outer nut results in 3.6 degrees of shaft phase adjustment. With the "D" hub fixed, rotation of the "S" hub is opposite to the direction of nut rotation. With the "S" hub fixed, rotation at the "D" hub is in the same direction as nut rotation.

The coupling is essentially self-locking, and applications requiring frequent adjustment can be investigated for the possibility of operating without having to seat the locking screw. However, those applications in which the coupling is subjected to typical motor start up accelerations, sudden stops, and/or a vibratory environment will require use of the screw to maintain a phase setting.

The coupling during adjustment is not intended to drive against any significant reaction load that may exist between the connected shafts. However, some adjusting nut torque amplification results to provide a hub drive torque capability within recommended limits noted below.

Dimensions are in inches

Spanner wrench holes are provided on the OD of the adjusting nut in sizes 50, 100, and 200.