Mechanical Encoders
SERIES 25
Multi-Deck
FEATURES
• Multiple Code and Indexing Choices
• Reliability Tested to Listed Specifications
• Less than 1.0" Square
• Termination Choices
• Panel and Shaft Seal Option
• Manufactured to ISO 9001 and Military Standards
• Custom Configurations Available
DIMENSIONS
in inches (and millimeters)
.250 ± .015
(6,35 ± 0,38)
DIM. A ± .025
(DIM A ± 0,64)
.865 ± .015
(21,97 ± 0,38)
Optical and Mechanical
Encoders
.320 ± .010
(8,13 ± 0,25)
.365 ± .020
(9,27 ± 0,51)
.219 ± .005
(5,56 ± 0,13)
PART NUMBER,
DATE CODE, AND
PINOUT ID LABEL
Ø
.250 + .001 - .002
(6,35 + 0,03 - 0,05)
.250 ± .020
(6,35 ± 0,51)
.060 ± .015
(1,53 ± 0,38)
.375 (9,53) 3/8-32
UNEF-2A THREAD
.190 ± .015
(4,83 ± 0,38)
.050 ± .005
(1,27 ± 0,13)
.020 ± .005
(0,51 ± 0,13)
.100 ± .010
(2,54 ± 0,25)
TYP.
.288 ± .015
(7,31 ± 0,38)
C
L
C
L
.200 ± .015
(5,08 ± 0,38)
Number of Decks
1
2
3
4
Dimension A
.450 (11,43)
.650 (16,51)
.850 (21,59)
1.050 (26,67)
.865 ± .015
(21,97 ± 0,38)
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Mechanical Encoders
SPECIFICATIONS
Electrical Ratings
Switching Loads: 150 mA at 120 Vac, resistive;
150 mA at 28 Vdc, resistive
Current Carrying Capacity:
250 mA at 28
Vdc, resistive
Contact Resistance:
75 mΩ max. after life
Insulation Resistance:
1000 mΩ minimum
between terminals and shaft
Voltage Breakdown:
1000 Vac minimum
between terminals and shaft
Life Expectancy:
50,000 cycles at rated loads
Contacts:
Shorting
Mechanical Ratings
Stop Strength:
10 in-lbs minimum
Rotational Torque:
4-20 in-oz, dependent on
the number of decks
Operating Temperature Range:
-65°C to
+85°C
Non-Turn Device:
Flatted mounting bushing,
.375" dia. x .320"
Package Size:
.865" square
Termination:
PC terminals, .100" on center.
Decks are .200" apart
Hardware:
Hex nut and lockwasher supplied
Materials and Finishes
Bushing:
Die cast zinc alloy, tin-zinc plated
Mounting Hardware:
plated brass
Decks, Deck Separators, End Plate:
Thermoplastic
Contacts and Terminals: Gold, silver, nickel-
plated beryllium copper
Shaft, Stop Blades:
Stainless Steel
Detent Balls:
Steel, nickel-plated
Rivets:
Brass, zinc-plated
ORDERING INFORMATION
Series 25:
Multi-deck
Shaft size:
B =
1
/
4
" diameter shaft
Sealed or non-sealed:
S = Shaft and panel seal; No letter = no seal
Terminal structure:
P = PC, perpendicular to shaft; R = PC, rear facing (one deck
only); F = PC, front facing (one deck only).
Angle of throw (determines the maximum number of positions):
10 = 10°, 36 positions; 11 = 11.25°, 32 positions; 12 = 12°, 30 positions;
15 = 15°, 24 positions; 18 = 18°, 20 positions; 22 = 22.5°, 16 positions;
30 = 30°, 12 positions; 36 = 36°, 10 positions; 45 = 45°, 8 positions; 60 = 60°, 6 positions;
90 = 90°, 4 positions.
25BSP22–Q–1–16 C
Stop arrangement:
For switches with maximum positions, add C for continuous rotation;
add F for stop between first and last. No notation required for less than maximum
positions.
Number of positions:
Maximum is dependent on the angle of throw. Minimum is two.
Number of decks:
One through four possible.
Code output:
B = Binary (contact Grayhill for availability)
Q = Quadrature
G = Gray (contact Grayhill for availability)
Specials include
1
/
8
" diameter shaft, custom angles of throw for binary, binary complement
and gray code outputs. Contact Grayhill Sales for availability.
Control knobs available.
For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.
Optical and Mechanical
Encoders
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
