HDI

HDI Infinit-Indexer® phase adjusters are available from immediate stock in the standard bore sizes with keyways, set screws, and tapped holes for face mounting of either hub.

They provide hand adjustable, precise, static phase adjustment. Adjustments can be made by hand in either direction by adjusting the knurled outer ring producing infinitely variable relative rotation of the hubs.

Key Features:

• Phase Adjuster
• Shaft Phasing Coupling
• Adjust Ratio: 100:1
• Available in 6 sizes
• Torque: 500-20,000 in-lb

HDI Series Infinit-Indexer® Phase Adjusters

The Stocking Program

The stocking program offers the most cost effective way to purchase HDI phase adjusters. Three sizes of HDIs, (10, 25, and 50) are available from the stocking program.
Each comes with keyways and tapped holes on both hubs and is readily available from stock. Several bore sizes are available from the stocking program:

Dimensions (inches)

Dimensions (inches)

Special Order

HDI phase adjusters are available in 6 sizes. All sizes are furnished complete with hubs to specific order requirements. Several bore sizes are available with keyways and tapped holes on one or both hubs or in minimum plain bore for alteration by the user.

Special Order by Model Ordering Code

Special Order by Dimension

HDI phase adjusters are available in 6 sizes. All sizes are furnished complete with hubs to specific order requirements. Several bore sizes are available with keyways and tapped holes on one or both hubs or in minimum plain bore for alteration by the user.

Dimensions are in inches

Special Order by Configuration

Dimensions are in inches

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

The INFINIT-INDEXER phase adjuster is installed in a machine system either as an in-line shaft coupling per Fig. 1 and Fig. 2 or parallel shaft coupling per Fig. 3.

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® phase adjuster 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® phase adjuster at a uniform diameter with a tight running fit.

Applications

The Infinit-Indexer® phase adjuster provides the designer with a simple component which will solve a variety of design problems that require precise shaft phase adjustments.

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.