H-23_07 Datasheet, PDF (1/1 Pages) Bourns Electronic Solutions – Turns-Counting Dial

*RoHS ^COMPLIANT
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*
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
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.
POTENTIOMETER
HARDWARE
KEY SLOT SUPPLIED WITH
(INSIDE) POTENTIOMETER
KEYED TO
ANTIROTATION DEVICE
OUTER RING
POTENTIOMETER
MOUNTING HOLE
9.52
(.374)
10.36
(.407)
TYP.
DIMENSIONS:
MM
(IN.)
PANEL
ANTIROTATION
DEVICE
SET SCREW
TURNS-COUNTING
DIAL
1.98
(.077)
PANEL HOLE
PATTERN
9.53
(.375)
18.1
(.712)
MIN.
22.2
(.874)
MAX.
3.30
(.129)
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.
16.5 22.2
(.649) (.874)
How To Order
Part
Number
Accepts Shaft
Diameter
H-23-6A 6.35 mm (.250)
H-23-6M 6 mm (.236)
H-23-3A 3.17 mm (.124)
Finish
Polished chrome
Polished chrome
Polished chrome