Harmonic Drive LLC | 247 Lynnfield St. Peabody, MA 01960 | 800-921-3332
Harmonic Drive and Harmonic Planetary are registered trademarks of Harmonic Drive LLC.


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

Catalog

DXF CAD Files

PDF CAD Files

3D CAD Files

Don't see what you need or not sure where to start?

Our team can help you find the right gear for your application!



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)

HDI Size Bore Sizes Keyway Tapped Holes Torque Capacity Model Ordering Code
10 1/2" 3/16" 3 - #8-32 113 Nm 1000 lb-in HDI - 010 - 500
5/8" HDI - 010 - 625
3/4" HDI - 010 - 750
25 3/4" 1/4" 6 - #10-32 283 Nm 2500 lb-in HDI - 025 - 750
1" HDI - 025 -10005
50 1 1/4" 1/4" 6 - ¼-20 565 Nm 5000 lb-in HDI - 050-12500


Dimensions (inches)

Size
10 10 10 25 25 50
BORE 0.5000 0.6250 0.7500 0.7500 1.0000 1.2500
D2 1.38 1.38 1.38 1.75 1.75 2.17
D3 2.38 2.38 2.38 3.00 3.00 3.75
L1 1.69 1.69 1.69 2.19 2.19 2.37
L2 0.31 0.31 0.31 0.40 0.40 0.37
L3 1.06 1.06 1.06 1.38 1.38 1.63
K1 0.1875 0.1875 0.1875 0.2500 0.2500 0.2500
KH1 0.585 0.710 0.831 0.863 1.114 1.368
N1 3 3 3 6 6 6
H1 #8-32 #8-32 #8-32 #10-32 #10-32 1/4-20
PC1 1.125 1.125 1.125 1.500 1.500 1.750
CAD Downloads PDF DXF PDF DXF PDF DXF




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

HDI - 10 - 6S - 6D
1 2 3 4

1. Name of Model : HDI
2. Size : 5, 10, 25, 50, 100, 200
3. Hub Configuration
  • Plain Bore Hub
  • Key way-set Screw Hub
  • Tapped Holes Hub

: xxS (2S, 3S, 4S...20S)
: xxSK (2SK, 3SK, 4SK...20SK)
: xxST (2ST, 3ST, 4ST...20ST)

4. Hub Configuration
  • Plain Bore Hub
  • Key way-set Screw Hub
  • Tapped Holes Hub
: xxD (2D, 3D, 4D...20D)
: xxDK (2DK, 3DK, 4DK...20DK)
: xxDT (2DT, 3DT, 4DT...20DT)


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

HDI SIZE
5 10 25 50 100 200
D1 1 1.38 1.75 2.17 2.94 3.75
D2 2 2.38 3 3.75 4.75 6.5
L1 1.43 1.69 2.19 2.37 3.29 4.05
L2 26 0.31 0.4 0.37 0.62 0.84
L3 0.91 1.06 1.38 1.63 2.06 2.38
N1 3 3 6 6 6 6
H1 #6-32 #8-32 #10-32

¼-20

5/16-18 3/8-16
PC1 0.75 1.13 1.5 1.75 2.5 3.13
Torque 500 1000 2500 5000 10000 20000
Weight 1.2 1.5 3 5 11 24

Special Order by Configuration


Dimensions are in inches

Size Plain Bore Keyway-set Screw Tapped Holes
BASIC HDI SIZE BORE SIZE D HUB S HUB D HUB S HUB G H J D HUB S HUB Number of Holes M* N
UN-2B
5 0.250 2D 2S 2DK 2SK 8-32 - - 2DT 2ST 3 6-32 0.750
0.375 3D 3S 3DK 3SK 8-32 0.409 0.062 3DT 3ST 6-32 0.750
0.500 4D 4S 4DK 4SK 8-32

0.561

0.125 4DT 4ST 6-32 0.750
10 0.500 4D 4S 4DK 4SK 10-32 0.585 0.1875 4DT 4ST 3 8-32 1.125
0.625 5D 5S 5DK 5SK 10-32 0.71 0.1875 5DT 5ST 8-32 1.125
0.750 6D 6S 6DK 6SK 10-32 0.837 0.1875 6DT 6ST 8-32 1.125
25 0.750 6D 6S 6DK 6SK 10-32 0.863 0.250 6DT 6ST 6 10-32 1.500
0.875 7D 7S 7DK 7SK

¼-20

0.988 0.250 7DT 7ST 10-32 1.500
1.000 8D 8S 8DK 8SK ¼-20 1.114 0.250 8DT 8ST 10-32 1.500
50 1.000 8D 8S 8DK 8SK ¼-20 1.114 0.250 8DT 8ST 6 ¼-20 1.750
1.250 10D 10S 10DK 10SK ¼-20 1.368 0.250 10DT 10ST ¼-20 1.750
100 1.250 10D 10S 10DK 10SK 3/8-16 1.418 0.750 10DT 10ST 6 5/16-18 2.500
1.625 13D 13S 13DK 13SK 3/8-16 1.793 0.375 13DT 13ST 5/16-18 2.500
1.750 14D 14S 14DK 14SK 3/8-16 1.918 0.375 14DT 14ST 5/16-18 2.500
200 1.750 14D 14S 14DK 14SK 1/2-13 2.026 0.625 14DT 14ST 6 3/8-16 3.125
2.000 16D 16S 16DK 16SK 1/2-13 2.276 0.625 16DT 16ST 3/8-16 3.125
2.500 20D 20S 20DK 20SK 1/2-13 2.778 0.625 20DT 20ST 3/8-16 3.125
TO ORDER: Specify the basic HDI size and the desired "S" and "D" hub configuration. Examples: (1) an HDI-10-6SK-6D specifies a basic HDI-10 size unit with one hub .750" plain bore and the other .750" bore with keyway and setscrew. (2) an HDI-25-8DT-8SK specifies a basic HDI-25 size unit with one hub 1.0 bore with tapped holes, the other 1.0 bore with keyway and setscrew.
* Sizes HDI-05 and HDI-10 have three equally spaced UN-2B tapped holes
* Sizes HDI-25, HDI-50, HDI-100 and HDI-200 have six equally spaced UN-2B tapped holes. True position of holes .015 diam.


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 adjustert 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

Unit Size Adjustable Nut Input Torque Hub Output Torque (lb-in)
05 4 20
10 8 40
25 16 80
50 32 160
100 75 380
200 150 750

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

Contact

Contact Us

Email us a Question

or
Call 800-921-3332

Hours 8:00am - 5:00pm EST
Monday through Friday