MODELS 7274, 7276
7/8” Diameter
Plastic 10–Turn
Wirewound
Precision Potentiometer
MODEL STYLES
2
7274
7276
ELECTRICAL
6mm Shaft, 3/8” Bushing
1/4” Shaft, 3/8” Bushing
Resistance Range, Ohms
Standard Resistance Tolerance
Independent Linearity
Power Rating, Watts
Dielectric Strength
Insulation Resistance, Minimum
Noise, Maximum
Actual Electrical Travel
Tap Tolerance
End Voltage, Maximum (% of input voltage)
ENVIRONMENTAL (MIL-R-12934)
100 to 100K
±5%
±0.25%
2.0 at 25°C derating to 0 at 105°C
1,000V rms
1,000 Megohms
100 Ohms
3600° + 10° – 0°
±3°
0.25%
Operating Temperature Range
Temperature Cycling
Shock, 6ms Sawtooth
Vibration
Moisture Resistance
High Temperature Exposure
Rotational Load Life
Specifications subject to change without notice.
–25°C to +105°C
5 cycles, –25°C to +105°C (5%
∆R)
100G’s (0.1ms discontinuity max.)
10G’s, 10 to 500 Hz (5%
∆R,
0.1ms discontinuity max.)
Five 24 hour cycles (3%
∆R)
1,000 hours at 105°C (5%
∆R)
500K shaft rev. + 900 hrs. at rated wattage at 25°C (5%∆R)
2-93
Model 7274, 7276
MECHANICAL
Total Mechanical Travel
Number of Gangs, Maximum
Weight, Nominal
Static Stop Strength, Maximum
Backlash, Maximum
Panel Nut Tightening Torque, Maximum
Shaft End Play, Maximum
Shaft Radial Play, Maximum
Start/Run Torque, Maximum
STANDARD RESISTANCE VALUES, OHMS
3600° + 15° – 0°
1
0.42 oz.
60 oz.-in.
2°
8 lb.-in.
.010”
.010”
1.5 oz.-in.
Total
Resistance
100
200
500
1K
2K
5K
10K
20K
50K
100K
Theoretical
Resolution
(% Nominal)
0.059
0.037
0.030
0.024
0.020
0.018
0.017
0.016
0.010
0.009
Tempco
of Wire
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
±20 ppm/°C
METRIC CONVERSIONS
1 in.
1 oz.
25.4 mm
28.4 gm
1 oz.-in.
1 lb.-in.
0,007 N-m
0,113 N-m
2-94
Model 7274, 7276
OUTLINE DIMENSIONS (Inch/mm)
.750±.040
19.1±1.02
Mounting Surface
Dim. A
Slider
CCW
CW
.812±.031
20.6±0.79
Adjustment Slot:
.047±.005/1.19±0.13 Wide X
+.015
+0.38
.063
/1.60
Deep X
-.000
-0.00
.195±.015/4.95±0.38 Long
2
.404±.002
Dia.
10.3±0.05
75°
Max.
.625
R Max.
15.9
+.000
.062 -.010
+0.00
1.58 -0.25
Anti-Rotation Pin
.060±.005/1.52±0.13 Dia.
on .290±.005/7.37±0.13 Radius.
Extends .040±.010/1.02±0.25
From Mounting Surface
3/8 - 32 UNEF Thread
.312±.016
7.93±0.41
7274
+.0000
Dim.
.2362
-.0020
A
Dia.
+0.00
6.00
-0.05
7276
.249±.001
Dia.
6.33±0.03
.875±.016
Dia.
22.2±0.41
OPTIONAL TERMINAL CONFIGURATION
40°
VIEW B
SLIDER
.625 R MAX
15.9 R MAX
.110
2.794
.020 Thickness
.060
±
.003
Dia.
1.524
±
.076
.062
±
.003
1.524
±
.076
Use Special Feature Code “FT” to order.
Enlarged View B
2-95
Model 7274, 7276
SPECIAL FEATURES
Center Tap
Linearity Tape
Flatted Shaft
Shaft Lock
Gold Plated Solder Lug Terminals (see optional terminal configuration)
ORDERING INFORMATION
CT
LT
FS
SL
FT
7276 R 10K L .25
Model Series
Resistance Prefix
Linearity
Resistance Value
MATCHING TURNS COUNTING DIALS
2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB
CIRCUIT DIAGRAM
NOTES
(S)
(CCW)
(CW)
Metric equivalents, based on 1 inch = 25.4mm are rounded to
the same number of significant figures as in the original
English units and are provided for general information only.
Tolerances unless otherwise specified:
Linear = ± .01 inches
(.25mm)
Angular = ± 2 degrees
INCH
mm
2-96
Model 7274, 7276