Features
Applications
■ Automation equipment
■ Large package size - 46 mm diameter
■ “Metalized” plastic dial body
■ Strong locking brake
■ Medical instrumentation excluding
critical life support applications
■ Test instrumentation
■ Industrial machinery
■ Economical
■ Ideal for use with 10-turn potentiometers
H-550 Turns-Counting Dial
Mechanical and Physical Characteristics
Number of Turns ..................................................................................................................................................................................0 to 11
Dial Divisions ...............................................................................................................................................................................100 per turn
Readability – Over 10 Turns .........................................................................................................................................Within 1/100 of a turn
Torque With Brake Engaged .....................................................................................................................8.47 N-cm (12.0 oz.-in.) maximum
Markings ...........................................................................................................................................................................Black on clear gray
Locking Brake............................................................................................................................................................................................Yes
Weight...............................................................................................................................................................................13 grams (0.46 oz.)
Set Screw .................................................................................................................................................................UNC 4/40, one included
Set Screw Tightening Torque ......................................................................................................................12.00 N-cm (17 oz-in.) minimum
17.65 N-cm (25 oz-in.) maximum
Hex Key Size ................................................................................................................................................................................0.05 in. hex
Shaft and Bushing Requirements
Shaft Diameter Requirements .......................................................................................................................0.635 mm (0.0250 in.) diameter
Shaft Extension Beyond Panel.........................................................................................................................17.5 mm (0.689 in.) minimum
22.5 mm (0.886 in.) maximum
Bushing Extension Beyond Panel .....................................................................................................................7.0 mm (0.276 in.) maximum
H-550 MOUNTING INSTRUCTIONS
Using the existing Antirotation Lug
1. Drill 3.2 mm (0.125) diameter antirotation pin hole on vertical
centerline 14.3 mm (0.562) below center of potentiometer
mounting hole.
2. Mount potentiometer shaft counterclockwise to obtain minimum
resistance or voltage ratio. This is not necessarily identical with the
mechanical stop.
4. Loosen set screws in knob of dial. Set dial to “0.0” reading.
5. While holding outer ring of dial, position unit lightly against panel.
Tighten knob set screws to potentiometer shaft.
Dimensional Drawing
MM
DIMENSIONS:
(IN.)
24.6
(.96)
15.9
(.625)
3.17
(.124)
14.30
(.562)
DIA.
10.31
(.405)
DIA.
46.0
(1.811)
PANEL LAYOUT
How to Order
Part
Number
Accepts Shaft
Diameter
Finish
H-550-6A (10 per box)
H-550-6A-1 (1 per box)
6.35 mm (.250 in.)
6.35 mm (.250 in.)
Grey Metalized Plastic
Grey Metalized Plastic
REV. 04/03
Specifications are subject to change without notice.
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