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H-46 Datasheet(PDF) 1 Page - Bourns Electronic Solutions

Part No. H-46
Description  Turns-Counting Dial
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Maker  BOURNS [Bourns Electronic Solutions]
Homepage  http://www.bourns.com
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H-46 Turns-Counting Dial
Mechanical and Physical Characteristics
Number of Turns ..................................................................................................................................................................................0 to 20
Dial Divisions ...............................................................................................................................................................................100 per turn
Readability – Over 10 Turns .........................................................................................................................................Within 1/100 of a turn
Torque With Brake Engaged...................................................................................................................21.18 N-cm (30.0 oz.-in.) maximum
Markings ..........................................................................................................................................................Black on chrome background
Locking Brake............................................................................................................................................................................................Yes
Weight.................................................................................................................................................................................73 grams (2.5 oz.)
Set Screw ..............................................................................................................................................................UNC N4-44, one included
Set Screw Tightening Torque ...................................................................................................................16.94 N-cm (1.5 lbs.-in.) minimum
Hex Key Size ................................................................................................................................................................................0.05 in. hex
Shaft and Bushing Requirements
Shaft Diameter Requirements ........................................................................................................................................Refer to chart below
Shaft Extension Beyond Panel .........................................................................................................................17.5 mm (0.689 in.) minimum
23.5 mm (0.925 in.) maximum
Bushing Extension Beyond Panel .....................................................................................................................4.5 mm (0.177 in.) maximum
24.0
(.944)
12.50
(.492)
14.30
(.562)
46.0
(1.811)
10.31
(.405)
14.30
(.562)
3.17
(.124)
PANEL LAYOUT
DIA.
DIA.
Part
Accepts Shaft
Number
Diameter
Finish
H-46-6A
6.35 mm (.250)
Satin Chrome
H-46-6M
6 mm (.236)
Satin Chrome
How to Order
Dimensional Drawing
H-46 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.
Using the Antirotation Device
1. Remove antirotation lug from dial by using pliers.
2. Mount potentiometer in panel with antirotation device nut
(supplied with dial) and lockwasher (supplied with potentiometer).
3. Turn 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.
Features
Large package size
For use with precision potentiometers up
to 20 turns
Excellent readability
Precision feel - no backlash
Cast housing
Applications
Power supplies
Sensors
Medical
Automation
Test equipment
MM
DIMENSIONS:
(IN.)
REV. 04/03
Specifications are subject to change without notice.




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