MODEL 7480 SERIES
7/8” Diameter
5–Turn
Wirewound
Precision Potentiometer
MODEL STYLES
2
7481
7483
7486
7488 (for heavy side load applications)
NEW PRODUCT
ELECTRICAL
1/8” Shaft, 1/4” Bushing
1/8” Shaft, Servo
1/4” Shaft, 3/8” Bushing
1/4” Shaft, 3/8” Bushing
Resistance Range, Ohms
Standard Resistance Tolerance
Minimum Practical Resistance Tolerance
Independent Linearity
Minimum Practical Independent Linearity
Power Rating, Watts
Dielectric Strength
Insulation Resistance, Minimum
Noise, Maximum
Actual Electrical Travel
Tap Tolerance
End Voltage, Maximum
ENVIRONMENTAL (MIL-R-12934)
100 to 50K
±5%
±1%
±0.25%
±0.25%, < 500 Ohms
±0.20%,
≥
500 Ohms
1.5 at 70°C derating to 0 at 125°C
1,000V rms
1,000 Megohms
100 Ohms
1080° + 10° – 0°, > 100 Ohms
1080° + 10° – 5°,
≤
100 Ohms
±3°
0.25% of input voltage
Operating Temperature Range
Thermal Shock
Shock, 6ms Sawtooth
Vibration
Moisture Resistance
High Temperature Exposure
Rotational Load Life
Rotational Life Model 7488 (1 pound Side Load)
Specifications subject to change without notice.
Static: –55°C to +125°C
Dynamic: –40°C to +125°C
5 cycles, –55°C to +125°C (5%
∆R)
100G’s (0.1ms discontinuity max.)
15G’s, 10 to 2,000 Hz (5%
∆R,
0.1ms discontinuity max.)
Five 24 hour cycles (3%
∆R)
1,000 hours at 125°C (5%
∆R)
500K shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
500K shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
2-109
Model 7480 Series
MECHANICAL
Total Mechanical Travel
Number of Gangs, Maximum
Weight, Nominal (single gang)
Backlash, Maximum
Static Stop Strength
Panel Nut Tightening Torque, Maximum
Shaft End Play, Maximum
Shaft Runout, T.I.R., Maximum
Pilot Diameter Runout, T.I.R., Maximum
Lateral Runout, T.I.R., Maximum
Shaft Radial Play, Maximum
Start/Run Torque, Maximum (per gang)
STANDARD RESISTANCE VALUES, OHMS
7481, 7486
60 oz.-in.
25 lb.-in.
.010”
.003”
.004”
.005”
.003”
1.2 oz.-in.
1800° + 15° – 0°
2
0.75 oz.
1°
7483
36 oz.-in.
N/A
.005”
.002”
.002”
.004”
.002”
0.9 oz.-in.
Total
Resistance
100
200
500
1K
2K
5K
10K
20K
Theoretical
Resolution
(% Nominal)
0.059
0.037
0.030
0.024
0.020
0.018
0.017
0.016
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
2-110
Model 7480 Series
OUTLINE DIMENSIONS (Inch/mm)
Dim.
A
7481
.688±.013
17.475±0.787
+.0000
-.0003
Dia.
+0.0000
3.1699
-0.0076
.1248
+.000
-.002
Dia.
+0.000
7.137
-0.051
.281
1/4-32 UNEF Thread
7486
.812±.031
20.625±0.787
+.0000
-.0005
Dia.
+0.0000
6.3500
-0.0127
.2500
+.000
-.002
Dia.
+0.000
10.312
-0.051
.406
3/8-32 UNEF Thread
Models 7481 & 7486
Bushing Mount with Sleeve Bearing
B
2
C
Mounting Surface
Dim. A
.125 Min.
3.18
Dim. B
Dim. C
D
1.125±.031
28.58±0.79
.750±.016
19.1±0.41
Slider
CCW
CW
75°
Max.
.625 R Max.
15.9
.080±.001
Dia.
2.03±0.03
+.000
-.010
+0.00
1.58
-0.25
.062
Chamfer
Dim. D .016/0.41 Max. x 45°
.312±.016
7.93±0.41
.875±.016 Dia.
22.2±0.41
Slot: .032±.005/0.813±0.127 Wide X
.032+.010-.000/0.813+0.254-0.000 Deep
(Not on Rear Shaft Models)
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
2-111
Model 7480 Series
OUTLINE DIMENSIONS (Inch/mm)
Model 7483
Servo Mount with Ball Bearing
1.250±.031
31.75±0.79
.875±.016
22.2±0.41
.250
CCW 6.35
CW Min.
Mounting Surface
.375±.031
9.53±0.79
.781
Dia. Max.
19.8
+.0000
.1248
-.0003
Dia.
+0.0000
3.1699
-0.0076
+.000
-.001
+0.000 Dia.
15.875
-0.025
.625
.057
Min.
1.45
.062±.005
1.58±0.13
Chamfer
.016/0.406 Max. x 45°
.062±.005
1.58±0.13
.625
R. Max.
15.9
105°
Max.
Clamp
Ears
Slider
.080±.001
Dia.
2.03±0.03
.875±.016
22.2±0.41
Housing Dia.
+.005
.875 -.010
+0.13 Dia.
22.2 -0.25
Clamp
.922
Dia. Max.
23.4
OPTIONAL TERMINAL CONFIGURATION
105° MAX
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
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
2-112
Model 7480 Series
SPECIAL FEATURES
Center Tap
Linearity Tape
Rear Shaft Extension
Flatted Shaft
Slotted Shaft (Standard on single gang 7486 without RS)
Shaft Lock (7481, 7486 only)
High Torque 2–6 oz.-in. (7486 only)
Additional Gangs
Gold plated solder lug terminals (See optional terminal configuration)
ORDERING INFORMATION
CT
LT
RS
FS
SS
SL
HT
2G
FT
2
7486 R 10K T2 L .30 XX
Model Series
Resistance Prefix
Resistance Value
Optional Special
Feature Code
Linearity
Optional
Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
7481: RBJ, 2601, 2641
7486: 2606, 2607, 2626, 2627, 2646, 2647, 2126, 2606S, 2607S, 2646S, 2647S, 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
2-113
Model 7480 Series
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