Model: A2991

Tachometer Generator

Properties:

Overall Height
2.375 inches
Overall Length
4.375 inches
Overall Width
1.750 inches
Electrical Resistance
280.0 ohms
Shaft Diameter
0.1562 inches single end
Current Type
Dc input
Shaft Rotation Direction
Clockwise single end
Mounting Method
Fixed base
Mounting Facility Type And Quantity
4 threaded hole
Accuracy Range In Percent
-1.0/+1.0
Calibration Speed In Rpm
3600.0
Calibration Voltage Output Type In Volts
80.0 dc
Features Provided
Horizontal mounting position and vertical mounting position
Length Of Shaft From Housing
0.625 inches single end
Center To Center Distance Between Mounting Facilities Parallel To Length
1.000 inches
Rotor Speed Rating In Rpm
3600.0 single full load
Center To Center Distance Between Mounting Facilities Parallel To Width
1.250 inches
Current Rating In Amps
0.080 single input
Shaft End Characteristic
A1 single style single end
Terminal Type And Quantity
2 wire lead
NSN
6680-00-530-0659
Part Number
A2991
Description
Generator,tachometer
CAGE
73693

A generator consisting of a series of mounted coils surrounding a rotating permanent magnet or a permanent magnet and a rotating armature. The voltage output is directly proportional to the speed of rotation of the shaft. When used with an associated indicator, transmits such data as revolutions per minute, speed of travel, and the like. May also be used in servomechanism loops as a system stabilizer. Excludes rotary inverters, rotary converters, motor generators, dynamotors, generator sets, synchros, frequency or phase changers, and engine accessory generators.

Part A2991 NSN 6680-00-530-0659

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
20241
FIIG:
A271A0
Concept No.:
1
App. Key:
F
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.6000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
177220
UFC:
87150
LTL:
100.0
LCL:
--
WCC:
652
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Phone: +1 470-231-0824
Email: Contact Form »
Schedule B and Export
  • Schedule B: 9029205000
  • SITC: 87325
  • End Use: Other parts and accessories of vehicles
  • NAICS: 334514
  • USDA: 1

Freight Class: Speedometers and tachometers, not for use in civil aircraft

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