2
2-93
Model 7274, 7276
M O D E L S T Y L E S
7274
6mm Shaft, 3/8" Bushing
7276
1/4" Shaft, 3/8" Bushing
MODELS 7274, 7276
7/8" Diameter
Plastic 10Turn
Wirewound
Precision Potentiometer
E L E C T R I C A L
Resistance Range, Ohms
100 to 100K
Standard Resistance Tolerance
5%
Independent Linearity
0.25%
Power Rating, Watts
2.0 at 25C derating to 0 at 105C
Dielectric Strength
1,000V rms
Insulation Resistance, Minimum
1,000 Megohms
Noise, Maximum
100 Ohms
Actual Electrical Travel
3600 + 10 0
Tap Tolerance
3
End Voltage, Maximum (% of input voltage)
0.25%
Specifications subject to change without notice.
E N V I R O N M E N T A L ( M I L - R - 1 2 9 3 4 )
Operating Temperature Range
25C to +105C
Temperature Cycling
5 cycles, 25C to +105C (5% R)
Shock, 6ms Sawtooth
100G's (0.1ms discontinuity max.)
Vibration
10G's, 10 to 500 Hz (5% R, 0.1ms discontinuity max.)
Moisture Resistance
Five 24 hour cycles (3% R)
High Temperature Exposure
1,000 hours at 105C (5% R)
Rotational Load Life
500K shaft rev. + 900 hrs. at rated wattage at 25C (5%R)
2-94
Model 7274, 7276
S T A N D A R D R E S I S T A N C E V A L U E S , O H M S
Theoretical
Total
Resolution
Tempco
Resistance
(% Nominal)
of Wire
100
0.059
20 ppm/C
200
0.037
20 ppm/C
500
0.030
20 ppm/C
1K
0.024
20 ppm/C
2K
0.020
20 ppm/C
5K
0.018
20 ppm/C
10K
0.017
20 ppm/C
20K
0.016
20 ppm/C
50K
0.010
20 ppm/C
100K
0.009
20 ppm/C
M E C H A N I C A L
Total Mechanical Travel
3600 + 15 0
Number of Gangs, Maximum
1
Weight, Nominal
0.42 oz.
Static Stop Strength, Maximum
60 oz.-in.
Backlash, Maximum
2
Panel Nut Tightening Torque, Maximum
8 lb.-in.
Shaft End Play, Maximum
.010"
Shaft Radial Play, Maximum
.010"
Start/Run Torque, Maximum
1.5 oz.-in.
M E T R I C C O N V E R S I O N S
1 in.
25.4 mm
1 oz.
28.4 gm
1 oz.-in.
0,007 N-m
1 lb.-in.
0,113 N-m
2
2-95
Model 7274, 7276
O P T I O N A L T E R M I N A L C O N F I G U R A T I O N
40
SLIDER
.625 R MAX
15.9 R MAX
VIEW B
.110
2.794
.020 Thickness
.060
.003
1.524
.076
.062
.003
1.524
.076
Enlarged View B
Dia.
Use Special Feature Code "FT" to order.
O U T L I N E D I M E N S I O N S ( I n c h / m m )
.625
15.9
R Max.
.875.016
22.20.41
Dia.
75
Max.
.312.016
7.930.41
+.000
-.010
+0.00
-0.25
.062
1.58
Mounting Surface
Dim. A
.404.002
10.30.05
.812.031
20.60.79
.750.040
19.11.02
Slider
CCW
CW
Dia.
3/8 - 32 UNEF Thread
Anti-Rotation Pin
.060.005/1.520.13 Dia.
on .290.005/7.370.13 Radius.
Extends .040.010/1.020.25
From Mounting Surface
Adjustment Slot:
.047.005/1.190.13 Wide X
+.015 +0.38
-.000 -0.00
.195.015/4.950.38 Long
.063 /1.60 Deep X
+.0000
-.0020
+0.00
-0.05
.2362
6.00
.249.001
6.330.03
Dim.
7274
7276
A
Dia.
Dia.
2-96
Model 7274, 7276
O R D E R I N G I N F O R M A T I O N
7276 R 10K L .25
Model Series
Resistance Prefix
Linearity
Resistance Value
M A T C H I N G T U R N S C O U N T I N G D I A L S
2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB
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
N O T E S
mm
INCH
(CCW)
(S)
(CW)
C I R C U I T D I A G R A M
S P E C I A L F E A T U R E S
Center Tap
CT
Linearity Tape
LT
Flatted Shaft
FS
Shaft Lock
SL
Gold Plated Solder Lug Terminals (see optional terminal configuration)
FT
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