Page 1
Model 7280
7/8” Diameter
10 Turn Wirewound
Precision Potentiometer
MODEL STYLES AVAILABLE
7281 1/8” Shaft, 1/4” Bushing
7283 1/8” Shaft, Servo
7284 6 mm shaft, 3/8” Bushing
7286 1/4” Shaft, 3/8” Bushing
7288 (for heavy side load applications) 1/4” Shaft, 3/8” Bushing
ELECTRICAL
Resistance Range 100 to 100K ohms
Standard Resistance Tolerance ±5%
Minimum Practical Resistance Tolerance ±1%
Independent Linearity
Minimum Practical Independent Linearity ±0.15% (<300 ohms), ±0.075% (≥300 ohms)
Power Rating 2.0 Watts at 70°C, derating to 0 at 125°C
Dielectric Strength 1,000 V rms
Insulation Resistance 1,000 Megohms minimum
Noise 100 ohms maximum
Actual Electrical Travel 3600° +10° -0° (>100 ohms), 3600° +10° -5° (≤100 ohms)
End Voltage maximum 0.25% of input voltage
Tap Tolerance ±3°
1
2
±0.25%
MECHANICAL
Total Mechanical Travel 3600° +15° -0°
Number of Gangs 2 maximum
Weight (single gang) 0.75 oz. nominal
Backlash 1° maximum
7281, 7284, 7286, 7288 7283
Static Stop Strength maximum 48 oz.-in. 36 oz.-in.
Panel Nut Tightening Torque maximum 25 lb.-in. n/a
Shaft End Play maximum 0.010” 0.005”
Shaft Runout maximum T.I.R. 0.003” 0.002”
Pilot Diameter Runout maximum T.I.R. 0.004” 0.002”
Lateral Runout maximum T.I.R. 0.005” 0.004”
Shaft Radial Play maximum 0.003” 0.002”
Start/Run Torque (per gang, ES option adds 0.5 oz.-in.) maximum 0.8 oz.-in. 0.6 oz.-in.
1
Specifications subject to change without notice.
2
Linearity is measured between 1% and 99% of input voltage.
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345 Website: www.bitechnologies.com
September 1, 2015 Model 7280 page 1 of 4
Pb
RoHS 2
compliant
Page 2
Model 7280
(CCW)
(S)
(CW)
ENVIRONMENTAL (MIL-PRF-12934)
Operating Temperature Range -40°C to +125°C dynamic, -55°C to +125°C static
Temperature Cycling 5 cycles, -55°C to +125°C, maximum 5% ΔR
Shock 6 ms Saw-tooth, 100 G’s, 0.1 ms maximum discontinuity
Vibration 15 G’s, 10 to 2,000 Hz, maximum 5% ΔR, 0.1 ms maximum discontinuity
Moisture Resistance Five 24 hour cycles, maximum 3% ΔR
High Temperature Exposure 1,000 hours at 125°C, maximum 5% ΔR
Rotational Load Life (1 lb side load for 7288) 1M shaft revolutions + 900 hours at 2.0 Watts & 70°C, maximum 5% ΔR
Ingress Protection Rating (IP Code) IP50, IP66 available as option (feature code ES)
ORDERING INFORMATION
7286 R 10K T2 L.25 xx
Model Series
Resistance Prefix
Resistance Value
Optional Non-standard Tolerance
FEATURE CODES
7281, 7283 plain shaft
7284, 7286, 7288 slotted shaft
Center Tap CT
Linearity Tape LT
Flatted Shaft FS
Slotted Shaft (standard on single cup 7284, 7286 &
7288 without RS feature)
Rear Shaft Extension (7281, 7286, 7288 single cup
only)
Shaft Lock (7286 & 7288 only) SL
High Torque 2-6 oz.-in. (7286 & 7288 only) HT
Additional Gang 2G
Gold Plated Solder Lug Terminals (see optional
terminal configuration)
Seal (IP66) 7284, 7286, or 7288 only ES
no
code
SS
RS
FT
Optional Feature Code (see table)
No code required for
slotted shaft 7284/7286/7288
Linearity
or for plain shaft 7281/7283
STANDARD RESISTANCE VALUES
Total Resistance
(Ohms)
100 0.059 ±20
200 0.037 ±20
500 0.030 ±20
1K 0.024 ±20
2K 0.020 ±20
5K 0.018 ±20
10K 0.017 ±20
20K 0.016 ±20
50K 0.010 ±20
100K 0.008 ±20
Theoretical
Resolution
(% nominal)
Tempco of wire
(ppm/°C)
When multiple Feature Codes are used the P/N shall be in the
same sequence as listed in this table (top to bottom).
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345 Website: www.bitechnologies.com
September 1, 2015 Model 7280 page 2 of 4
CIRCUIT DIAGRAM
Page 3
40°
SLIDER
.625 R MAX
15.9 R MAX
VIEW B
Model 7280
.625
15.9
R Max.
.875±.016
22.2±0.41
Dia.
75°
Max.
Slot: .032±.005/0.813±0.127 Wide X
.032+.010-.000/0.813+0.254-0.000 Deep
(Not on Rear Shaft Models)
Chamfer
.016/0.41 Max. x 45°
Dim. D
.312±.016
7.93±0.41
+.000
-.010
+0.00
-0.25
.062
1.58
.080±.001
2.03±0.03
Dia.
1.125±.031
28.58±0.79
Mounting Surface
Dim. A
Dim. B
Dim. C
.125
3.18
Min.
.750±.016
19.1±0.41
Slider
CCW
CW
Dim. 7286 & 728872847281
A
B
C
D
.688 ± .031
17.475 ± 0.787
.812 ± .031
20.625 ± 0.787
.812 ± .031
20.625 ± 0.787
+0.0000
-0.0003
+0.0000
-0.0076
Dia.
.1248
3.1699
+0.0000
-0.0005
+0.0000
-0.0127
Dia.
.2362
6.0000
+0.0000
-0.0005
+0.0000
-0.0127
Dia.
.2500
6.3500
+0.000
-0.002
+0.000
-0.051
Dia.
.281
7.137
+0.000
-0.002
+0.000
-0.051
Dia.
.406
10.312
+0.000
-0.002
+0.000
-0.051
Dia.
.406
10.312
1/4 - 32 UNEF Thread3/8 - 32 UNEF Thread 3/8 - 32 UNEF Thread
.110
2.794
.020 Thickness
.060 ± .003
1.524 ± .076
.062 ± .003
1.524 ± .076
Dia.
MATCHING TURNS COUNTING DIALS
7281: RBJ, 2601, 2641
7286, 7288: RB, 2126, 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S
OUTLINE DRAWINGS
Models 7281, 7284, 7286, & 7288
Bushing Mount with Sleeve Bearing
Optional Terminal Configuration
Use Special Feature Code “FT” to order.
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345 Website: www.bitechnologies.com
September 1, 2015 Model 7280 page 3 of 4
Enlarged View B
Page 4
Model 7280
40°
SLIDER
.625 R MAX
15.9 R MAX
VIEW B
105° MAX
.110
2.794
.020 Thickness
.060 ± .003
1.524 ± .076
.062 ± .003
1.524 ± .076
Dia.
105°
Max.
Clamp
.922
23.4
Dia. Max.
.625
15.9
R. Max.
Clamp
Ears
.875±.016
22.2±0.41
Housing Dia.
Slider
.080±.001
2.03±0.03
Dia.
.057
1.45
Min.
.062±.005
1.58±0.13
.062±.005
1.58±0.13
Chamfer
.016/0.406 Max. x 45°
.625
15.875
+.000
-.001
+0.000
-0.025
.875
22.2
+.005
-.010
+0.13
-0.25
.1248
3.1699
+.0000
-.0003
+0.0000
-0.0076
Dia.
Dia.
Dia.
Mounting Surface
.375±.031
9.53±0.79
.781
19.8
Dia. Max.
1.250±.031
31.75±0.79
.875±.016
22.2±0.41
.250
6.35
Min.
CCW
CW
OUTLINE DRAWINGS (continued)
Model 7283
Servo Mount with Ball Bearing
Optional Terminal Configuration
Use Special Feature Code “FT” to order.
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345 Website: www.bitechnologies.com
September 1, 2015 Model 7280 page 4 of 4
Enlarged View B
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