BF
Vishay Sfernice
Document Number: 54005
Revision 19-Dec-01
www.vishay.com
12
Precision Rotative Transducers,
Conductive Plastic, Bushing Mounting (ROT)
FEATURES
• Size 08 to 30
• Linearity ± 1% down to ± 0.05%
• Good Repeatability
• Long Life
• Essentially Infinite Resolution
• Up to 6 Electrical Functions with the same Shaft
• On Request Custom Design to meet your Specifications
• Following MIL-R-39023 and NFC 93-255 requirements
Functions linear, on request specific law
Theoretical electrical angle (TEA) actual electrical angle (AEA) – 2°
Independent linearity (over TEA) A≤±1% B ≤± 0.5% C ≤± 0.25%
on request mounting type: ball bearings NA down to D ≤± 0.1% down to E ≤± 0.05%
Actual electrical angle (AEA) 340° ± 3° 350° ± 2°
Ohmic values (RT) 1kΩ- 2kΩ- 5kΩ- 10kΩ- on request other values
Ohmic value tolerances at 20°C ± 10%
Output smoothness ≤0.05% ≤0.025%
Maximum power rating at 70°C 0.25W 0.3W 0.4W 0.5W 0.75W 1W 1.2W 1.5W
Wiper current recommended: a few µA - 1mA max. (continuous)
Tap (current or voltage) { Position : ± 2°
on request with angular position to be specified
U = current { Width : ≤4° / T = voltage Position : ± 2°
Load resistance on wiper (RL)min. 103 x RT
Repeatability ≤0.02 %
End voltage ≤0.4% for 470Ω≤RT≤1000Ω/ ≤0.2% for 1000Ω< RT≤2200Ω/
≤0.1% for RT > 2200Ω
Insulation resistance ≥1000MΩ, 500Vdc
Dielectric strength ≥750VRMS, 50Hz ≥1000VRMS, 50Hz
SIZE
MODEL 08
34 BF 09
78 BF 11
116 BF 13
156 BF 15
176 BF 18
134 BF 20
200 BF 30
300 BF
A complete range of bushing mount rotational motion transducers.
ELECTRICAL SPECIFICATIONS
Mechanical rotation 360° continuous; stops on request
Mounting type bushing
Shaft guiding sleeve bearings; on request ball bearings
Shaft stainless steel
Housing plastic moulding; on request anodized aluminum
Termination turrets; on request flexible leads, cables...
Wiper precious metal multi-finger contact
Starting torque (N.cm) ≤0.5 1 cup; ≤0.3 for each additional cup
Moment of inertia (g. cm2)0.3 0.4 0.6 0.8 2.2 2.8 3.5 10
Weight (g) 1 cup 11 ± 2 20 ± 2 21 ± 2 30 ± 2 33 ± 2 45 ± 3 54 ± 3 120 ± 10
each additional cup 5 ± 2 6 ± 2 7 ± 2 14 ± 2 16 ± 2 18 ± 3 21 ± 3 62 ± 10
Life (million of cycles) ≥20
Temperature range – 55°C, + 125°C
Climatic category 55 / 125 / 04
Rotation speed (RPM) 150
MECHANICAL SPECIFICATIONS
PERFORMANCE
BF
Vishay Sfernice
Document Number: 54005
Revision 19-Dec-01 www.vishay.com
13
SERIES
ROT
MODEL
156
MOUNTING
TYPE
B
B: Bushing
LINEARITY
C
A: ± 1%
B: ± 0.5%
C: ± 0.25%
D: ± 0.1%
E: ± 0.05%
OHMIC VALUE
502
First 2 digits are
significant numbers
3rd digit indicates
number of zeros
MODIFICATION
W...
Special
feature
code number
CONDUCTOR
F
F: Plastic
NUMBER
OF CUPS
1
6 max.
TAP
T
on request
T: voltage
U: current
position to
be specified
DIMENSIONS
ø shaft
ø body
turret location
radius on turrets
radius on screw clamp
ø on clamp
locating pin (on request)
ø pin (on request)
angle between turrets
total angle
1 cup
2 cups
3 cups
4 cups
5 cups
6 cups
3.175
19.18
4.2
14
13.5
19.6
7.2
1.6
30°
100°
14.5
21.5
34.5
40.5
53
59
3.175
22.3
4.7
15.4
15.4
23.8
8
1.6
30°
100°
19
25
38
48
61
72
3.175
27.07
5.35
17.3
17.3
27.7
8.8
3.25
25°
100°
19
21.5
34.5
40.5
53
59
3.175
33.35
5.35
20.8
18.9
33.6
9
3.25
20°
100°
19
24
38
45.5
59
67
6.345
36.6
8
23.1
23.1
37.4
14.4
3.25
20°
80°
21
24.5
37.5
48
60.5
72
6.345
44.5
8
26.6
26.5
44.5
16.8
3.25
25°
80°
21
24.5
37.5
48
61
72
6.345
50.9
7.45
29.7
29.3
50.8
13.48
-
15°
80°
21
26
38
48
62
72
6.345
76.4
5.55
43.7
42.6
77.5
-
-
15°
80°
20.5
23.5
-
-
-
-
DESIGNATION POTENTIOMETER REFERENCE
SIZE 08
34 BF 09
78 BF 11
116 BF 13
156 BF 15
176 BF 18
134 BF 20
200 BF 30
300 BF
MODEL
ORDERING INFORMATION
Special characteristics and designs on request.
ELECTRICAL
CONNECTIONS
321
Clockwise
Viewed from shaft side
J
O
øK on clamp
ø P
I
M
L
L
ø 10.3 - 0.02
- 0
N
1.6
9.9 max.
20 max.
*
*on request
0.5 x 45°
ø C
0.4 x 45
øA
H
ø 9.52 x 0.79
3/8 - 32 NEF2A THD
Delivered with nut + washer
DIMENSIONS in millimeters, general tolerance ± 0.5mm
A– 0
– 0.013
C max.
H min.
I max.
J max.
K
O
P max.
L±2°
M max.
N max.
Precision Rotative Transducers,
Conductive Plastic, Bushing Mounting (ROT)
