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H-23-3A Datasheet(PDF) 1 Page - Bourns Electronic Solutions

Part No. H-23-3A
Description  Turns-Counting Dial
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Maker  BOURNS [Bourns Electronic Solutions]
Homepage  http://www.bourns.com
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H-23 Turns-Counting Dial
Mechanical and Physical Characteristics
Number of Turns ..................................................................................................................................................................................0 to 15
Dial Divisions .................................................................................................................................................................................50 per turn
Readability - Over 10 Turns.....................................................................................................................................................2 parts in 1000
Torque With Brake Engaged ........................................................................................................................6.95 oz-in. (500 g-cm) minimum
Markings ...........................................................................................................................................Black on polished chrome background
Locking Brake............................................................................................................................................................................................Yes
Weight...............................................................................................................................................................................15 grams (0.53 oz.)
Set Screw ..............................................................................................................................................................UNC N2-56, 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 .........................................................................................................................18.1 mm (0.712 in.) minimum
22.2 mm (0.875 in.) maximum
Bushing Extension Beyond Panel ...................................................................................................................9.53 mm (0.375 in.) maximum
9.52
(.374)
1.98
(.077)
POTENTIOMETER
POTENTIOMETER
MOUNTING HOLE
PANEL
ANTIROTATION
DEVICE
KEY SLOT
(INSIDE)
HARDWARE
SUPPLIED WITH
POTENTIOMETER
KEYED TO
ANTIROTATION DEVICE
TURNS-COUNTING
DIAL
SET SCREW
OUTER RING
PANEL HOLE
PATTERN
10.36
(.407)
TYP.
H-23 MOUNTING INSTRUCTIONS
1. Insert potentiometer in panel.
2. Install anti-rotation device using hardware supplied with
potentiometer.
3. Turn potentiometer shaft counterclockwise to minimum
resistance or voltage ratio.
4. Set the dial to “0.0” and brake on.
5. Insert the dial on the potentiometer shaft lightly against the panel.
6. Tighten set screw to potentiometer shaft.
MAX.
MIN.
18.1
(.712)
22.2
(.874)
9.53
(.375)
16.5
(.649)
3.30
(.129)
22.2
(.874)
Part
Accepts Shaft
Number
Diameter
Finish
H-23-6A
6.35 mm (.250)
Polished chrome
H-23-6M
6 mm (.236)
Polished chrome
H-23-3A
3.17 mm (.124)
Polished chrome
How To Order
Features
No backlash
Compact - requires minimal panel space
(22.2 mm diameter requirement)
For use with precision potentiometers or
other rotating devices, up to 15 turns
Designed for metal shaft
High Force “Click Brake”
Black on polished chrome background
RoHS compliant*
MM
DIMENSIONS:
(IN.)
REV. 04/07
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.




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