Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical and Mechanical
Encoders
Mechanical Encoders
SERIES 25
Multi-Deck
FEATURES
• Multiple Code and Indexing Choices
•ReliabilityTestedtoListedSpecications
• Less than 1.0" Square
• Termination Choices
• Panel and Shaft Seal Option
• Manufactured to ISO 9001 and Military Standards
•CustomCongurationsAvailable
DIMENSIONS in inches (and millimeters)
.865 ± .015
(21,97 ± 0,38)
DIM. A ± .025
(DIM A ± 0,64)
.200 ± .015
(5,08 ± 0,38)
C
L C
L
.288 ± .015
(7,31 ± 0,38)
.250 ± .015
(6,35 ± 0,38)
.365 ± .020
(9,27 ± 0,51)
.250 ± .020
(6,35 ± 0,51)
.375 (9,53) 3/8-32
UNEF-2A THREAD
.320 ± .010
(8,13 ± 0,25)
.050 ± .005
(1,27 ± 0,13)
.100 ± .010
(2,54 ± 0,25)
TYP.
.060 ± .015
(1,53 ± 0,38)
Number of Decks
.450 (11,43)
.650 (16,51)
.850 (21,59)
1.050 (26,67)
Dimension A
1
2
3
4
PART NUMBER,
DATE CODE, AND
PINOUT ID LABEL
.219 ± .005
(5,56 ± 0,13)
.250 + .001 - .002
(6,35 + 0,03 - 0,05)
.190 ± .015
(4,83 ± 0,38) .020 ± .005
(0,51 ± 0,13)
.865 ± .015
(21,97 ± 0,38)
Ø
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
Mechanical Encoders
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 rst 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.
SPECIFICATIONS
Electrical Ratings
Switching Loads:150mAat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
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
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
ORDERINGINFORMATION
Forpricesanddiscounts,contactalocalSalesOfce,anauthorizedlocalDistributororGrayhill.
Controlknobsavailable.