MODEL 8140 SERIES
7/8” Diameter
10–Turn* Hybrid
Precision Potentiometer /
Position Sensor
MODEL STYLES
2
8141
8143
8146
8148 (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
Power Rating, Watts
Dielectric Strength
Insulation Resistance, Minimum
Output Smoothness, Maximum
Actual Electrical Travel, Nominal
Tap Tolerance (Voltage Tap Only)
End Voltage, Maximum
Resolution
Temperature Coefficient
ENVIRONMENTAL (MIL-R-12934)
1K to 100K
±10%
±5%
±0.25%
2.0 at 70°C derating to 0 at 125°C
1,000V rms
1,000 Megohms
0.05%≤5K Ohms, 0.03%>5K Ohms
3600°
±0.05% of input voltage
0.2% of input voltage
Essentially Infinite
+100ppm/°C, -150ppm/°C
Operating Temperature Range
Temperature Cycling
Shock, 6ms Sawtooth
Vibration
Moisture Resistance
High Temperature Exposure
Rotational Load Life
Rotational Life Model 8148 (1 pound Side Load)
Specifications subject to change without notice.
* Model available in 3 & 5 turn versions.
Static: –55°C to +125°C
Dynamic: -40°C to +125°C
5 cycles, –40°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)
5 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
5 mil. shaft rev. + 900 hrs. at rated wattage at 70°C (5%
∆R)
2-123
Model 8140 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
8141, 8146
60 oz.-in.
25 lb.-in.
.010”
.003”
.004”
.005”
.003”
0.8 oz.-in.
3600° + 15° – 0°
2
0.75 oz.
1°
8143
36 oz.-in.
NA
.005”
.002”
.002”
.004”
.002”
0.6 oz.-in.
1K
2K
5K
10K
20K
50K
100K
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
2-124
Model 8140 Series
OUTLINE DIMENSIONS (Inch/mm)
Models 8141 & 8146
Bushing Mount with Sleeve Bearing
Dim.
A
8141
.688±.031
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
8146
.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
B
2
1.125±.031
28.58±0.79
.750±.016
19.1±0.41
Slider
CCW
CW
Mounting Surface
Dim. A
C
D
.125 Min.
3.18
Dim. B
Dim. C
75°
Max.
.625 R Max.
15.9
.080±.001
Dia.
2.03±0.03
Slot: .032±.005/0.813±0.127 Wide X
.032+.010-.000/0.813+0.254-0.000 Deep
(Not on Rear Shaft Models)
+.000
-.010
+0.00
1.58
-0.25
.062
Dim. D
.312±.016
7.93±0.41
Chamfer
.016/0.41 Max. x 45°
.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
2-125
Model 8140 Series
OUTLINE DIMENSIONS (Inch/mm)
Model 8143
Servo Mount wiht Ball Bearing
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
1.250±.031
31.75±0.79
.875±.016
22.2±0.41
.250
CCW 6.35
CW Min.
.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
2-126
Model 8140 Series
SPECIAL FEATURES
Center Tap
Linearity Tape
Rear Shaft Extension (8143, 8146 single cup only)
Flatted Shaft
Slotted Shaft (Standard on single gang 8146 without RS)
Shaft Lock (8141, 8146 only)
High Torque 2–6 oz.-in. (8146 only)
Additional Gangs
Gold plated solder lug terminals (See optional terminal configuration)
ORDERING INFORMATION
CT
LT
RS
FS
SS
SL
HT
2G
FT
2
8146 R 10K T5 L .25 XX
Model Series
Resistance Prefix
Resistance Value
Optional Special
Feature Code
Linearity
Optional
Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
8141: RBJ, 2601, 2641
8146: 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
2-127
Model 8140 Series
