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Features

27 mm and 28 mm diameter 10 turns No backlash - mounted directly to potentiometer shaft For use with precision potentiometers or other rotating devices up to 10 turns High force, positive brake
CT-23/CT-26 Turns-Counting Dial
Mechanical and Physical Characteristics Number of Turns ..................................................................................................................................................................................0 to 10 Readability - Over 10 Turns..........................................................................................................................................Within 1/500 of a turn Torque with Brake Engaged .....................................................................................................................9.88 N-cm (14.0 oz.-in.) maximum Markings .............................................................................................................................................................White on black background Locking Brake................................................................................................................................................................Yes, Positive, friction Weight.................................................................................................................................................................................34 grams (1.2 oz.) Set Screw ...........................................................................................................................................................ISO M3x 0.35, one included Set Screw Tightening Torque ...................................................................................................................16.94 N-cm (1.5 lbs.-in.) minimum Hex Key Size ................................................................................................................................................................................1.5 mm hex Shaft and Bushing Requirements Shaft Diameter Requirements ........................................................................................................................................Refer to chart below Shaft Extension Beyond Face of Locator Plate................................................................................................11.05 mm (0.43 in.) minimum 16.25 mm (0.63 in.) maximum Bushing Extension Beyond Face of Locator Plate ............................................................................................4.00 mm (0.15 in.) maximum
Bourns(R) Model CT-23, front of panel mounting, digital turnscounting dial saves valuable internal space. Highly accurate, it will enhance the man/machine interface of any control panel. Easy to read white on black numerals provide excellent legibility and accurate readings within 1/500 of a turn. CT-23 MOUNTING INSTRUCTIONS 1. Drill or punch panel. See suggested hole pattern below. 2. Insert potentiometer in panel. 3. Mount potentiometer in panel with nut and lockwasher supplied with the potentiometer. 4. Turn the potentiometer shaft counterclockwise to obtain minimum resistance or voltage ratio (not necessarily at the end of travel). 5. Loosen set screw in knob with allen wrench. Set the dial readout to "000." 6. Slip the dial carefully over the potentiometer shaft. Tighten the set screw without causing movement of the dial readout or potentiometer shaft. Bourns(R) Model CT-26 recessed mounting digital turns-counting dial, counterpart to the Bourns Model CT-23, provides a lower panel profile. The design simplifies installation requiring only one panel hole. The CT-26 maintains the same high level of symmetry, legibility and accuracy of its counterpart. CT-26 MOUNTING INSTRUCTIONS 1. Drill or punch panel. See suggested hole pattern below. 2. Insert turns-counting dial in panel cutout and secure with mounting nut. 3. Secure locator plate to potentiometer bushing using two hex nuts. 4. Turn the potentiometer shaft counterclockwise to obtain minimum resistance or voltage ratio (not necessarily at the end of travel). 5. Loosen set screw in turns-counting dial with allen wrench. Set the dial readout to "000." 6. Slip the potentiometer shaft into the turns-counting dial, insuring that the notch in the locator plate is over the pin at the rear of the dial. Tighten the set screw without causing movement of the dial readout or potentiometer shaft. For mounting, the maximum recommended panel thickness is 1/8 " (3.1 mm).
DIMENSIONS:
MM (IN.)
Dimensional Drawings
How to Order
Part Number CT-23-6A CT-23-6M CT-26-6A CT-26-6M Accepts Shaft Diameter 6.35 mm (.250) 6 mm (.236) 6.35 mm (.250) 6 mm (.236)
Finish Black Knurl with Satin Chrome Face
REV. 04/06
Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.

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