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Datasheet. 7221-391-0 specification
Section Quantity
The number of individual elements.
The number of individual elements.
1
Body Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the body.
The style designation indicating the configuration that most nearly corresponds to the appearance of the body.
cylindrical bushing mounted
Reliability Indicator
An indication that the level of probability that an item will operate without failure,at a specified rated capability,at a specified temperature,and for a specified period of time,has been established by testing random samples of production lot.
An indication that the level of probability that an item will operate without failure,at a specified rated capability,at a specified temperature,and for a specified period of time,has been established by testing random samples of production lot.
not established
Body Diameter
The length of a straight line which passes through the center of the body,and terminates at the circumference.
The length of a straight line which passes through the center of the body,and terminates at the circumference.
0.859 mils and 0.891 centimeters
Shaft Diameter
The length of a straight line which passes through the center of a shaft,and terminates at the circumference.
The length of a straight line which passes through the center of a shaft,and terminates at the circumference.
0.1245in. and 0.1248in.
Shaft Length
A measurement of the longest dimension of the shaft,in distinction from width.
A measurement of the longest dimension of the shaft,in distinction from width.
0.656in. and 0.708in.
Mounting Bushing Length
0.296in. and 0.328in.
Body Length
A measurement of the longest dimension of the body,in distinction from width.
A measurement of the longest dimension of the body,in distinction from width.
1.448in. and 1.466in.
Shaft Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the shaft.
The style designation indicating the configuration that most nearly corresponds to the appearance of the shaft.
round
Shaft Bearing Type
Indicates the type of shaft bearing/s/ furnished.
Indicates the type of shaft bearing/s/ furnished.
sleeve
Actuator Type
Indicates the type of facility or arrangement provided for moving the variable contact(s).
Indicates the type of facility or arrangement provided for moving the variable contact(s).
single shaft
Effective Electrical Rotation In Deg Angular Rotation
That part of the total rotational travel of the actuator that produces a change in output,expressed in degree angular rotation.
That part of the total rotational travel of the actuator that produces a change in output,expressed in degree angular rotation.
3600.0 and 3610.0
Maximum Starting Torque
The maximum amount of turning force required to initiate the actuator movement.
The maximum amount of turning force required to initiate the actuator movement.
6.00 INCH-Ounces
Maximum Running Torque
The maximum amount of force requred to maintain actuator movement.
The maximum amount of force requred to maintain actuator movement.
5.00 INCH-Ounces
Maximum Stop Torque
The maximum amount of turning force that can be applied through the operating shaft with0ut damage to the stops.
The maximum amount of turning force that can be applied through the operating shaft with0ut damage to the stops.
128.00 INCH-Ounces
Shaft End Play
The total axial excursion of the shaft measured at the end of the shaft with a specified axial load applied alternately in the opposite directions.
The total axial excursion of the shaft measured at the end of the shaft with a specified axial load applied alternately in the opposite directions.
0.005in.
Shaft Runout
The eccentricity of the shaft diameter with respect to the rotational axis of the shaft,measured at a specified distance from the end of the shaft,when the body of the item is held fixed and the shaft is rotated with a specified load applied radially to the shaft.
The eccentricity of the shaft diameter with respect to the rotational axis of the shaft,measured at a specified distance from the end of the shaft,when the body of the item is held fixed and the shaft is rotated with a specified load applied radially to the shaft.
0.001in.
Lateral Runout
The perpendicularity of the mounting surface,with respect to the rotational axis of the shaft,and measured on the mounting surface at a specified distance from the outside edge of the mounting surface,when the shaft is held fixed and the body of the item is rotated with specified loads applied radially and axially to the body of the item.
The perpendicularity of the mounting surface,with respect to the rotational axis of the shaft,and measured on the mounting surface at a specified distance from the outside edge of the mounting surface,when the shaft is held fixed and the body of the item is rotated with specified loads applied radially and axially to the body of the item.
0.003in.
Pilot Diameter Runout
The eccentricity of the pilot diameter with respect to the rotational axis of the shaft and measured on the pilot diameter when the shaft is held and the body of the item is rotated while a specified load is applied radially to the body.
The eccentricity of the pilot diameter with respect to the rotational axis of the shaft and measured on the pilot diameter when the shaft is held and the body of the item is rotated while a specified load is applied radially to the body.
0.001in.
Shaft Radial Play
The total radial excursion of the shaft measured at a specified distance from the front surface of the unit with a specified radial load applied alternately in opposite directions at a specified point.
The total radial excursion of the shaft measured at a specified distance from the front surface of the unit with a specified radial load applied alternately in opposite directions at a specified point.
0.003in.
Fragility Factor
The measure of sensitivity of the item to be packaged. a factor used by packaging engineers in devising proper cushioning in a package.
The measure of sensitivity of the item to be packaged. a factor used by packaging engineers in devising proper cushioning in a package.
moderately rugged
Screw Thread Diameter
The length of a straight line which passes through the center of a coaxial cylinder which would bound the crest of an external thread or the root of an internal thread.
The length of a straight line which passes through the center of a coaxial cylinder which would bound the crest of an external thread or the root of an internal thread.
0.250in.
Screw Thread Series Designator
A designation distinguishing one group of screw thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
A designation distinguishing one group of screw thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unef
Screw Thread Quantity Per Inch
The number of screw threads on the item per linear inch measured on a line parallel to the thread axis,including incomplete threads.
The number of screw threads on the item per linear inch measured on a line parallel to the thread axis,including incomplete threads.
32.0
Terminal Location
The position of the terminal/s/ for making connection to an item.
The position of the terminal/s/ for making connection to an item.
longitudinally positioned on the circumference
Mounting Method
The means of attaching the item.
The means of attaching the item.
standard bushing
Cubic Measure
A measurement of volume taken by multiplying the length by the width by the height of an item and rendered in cubic units.
A measurement of volume taken by multiplying the length by the width by the height of an item and rendered in cubic units.
0.914 cubicin.
Electrical Resistance Per Section
A measure of the opposition to the flow of direct or alternating current per section.
A measure of the opposition to the flow of direct or alternating current per section.
390.0 ohms c and better flooring
Rotary Actuator Travel In Angular Deg
The measurement of the rotary mechanical motion of the actuating shaft of an item,expressed in degrees.
The measurement of the rotary mechanical motion of the actuating shaft of an item,expressed in degrees.
3600.0 and 3610.0
Function Conformity Tolerance Per Section
The permissible range per section by which the actual value of resistance or voltage at any specified point may deviate from the theoretical value for the linear or nonlinear function,expressed as a minus and plus percent.
The permissible range per section by which the actual value of resistance or voltage at any specified point may deviate from the theoretical value for the linear or nonlinear function,expressed as a minus and plus percent.
-0.075/+0.075 single section
Ambient Temp In Deg Celsius Per Section At Zero Percent Rated Power
The ambient temperature at which the power dissipation of each section is derated to zero percent of the full rated power.
The ambient temperature at which the power dissipation of each section is derated to zero percent of the full rated power.
125.0 single section
Power Dissipation Rating Per Section In Watts
The maximum amount of electrical energy that can be expended per section,expressed in watts.
The maximum amount of electrical energy that can be expended per section,expressed in watts.
2.0 7th secondary quality
Function Conformity Per Section
The fidelity of the relationship between the actual function characteristics and the theoretical function per section.
The fidelity of the relationship between the actual function characteristics and the theoretical function per section.
single section independent linearity
Resistance Tolerance Per Section In Percent
The limits of permissible variation in the electrical resistance value per section of an item from its rated value,expressed in percent.
The limits of permissible variation in the electrical resistance value per section of an item from its rated value,expressed in percent.
-3.0/+3.0 single section
Actuator Travel Control Feature
The feature that controls the actuator travel.
The feature that controls the actuator travel.
stops
Function Characteristic Per Section
The specified mathematical relation per section between the terminal resistance,or output ratio,and the rotation of the actuator.
The specified mathematical relation per section between the terminal resistance,or output ratio,and the rotation of the actuator.
7 oclock all primaries
Ambient Temp In Deg Celsius Per Section At Full Rated Power
The ambient temperature,expressed in degrees celsius,of the medium surrounding each section at which it can be operated continuously at full rated power.
The ambient temperature,expressed in degrees celsius,of the medium surrounding each section at which it can be operated continuously at full rated power.
70.0 single section
Terminal Type And Quantity
Indicates the type and number of terminals for providing electrical connection.
Indicates the type and number of terminals for providing electrical connection.
3 turret
Answers.
What quantity is this sold in?
1EA
How is this classified for shipping?
Schedule B number: 8533390080
nmfc 062960
Wirewound variable resistors
What's the federal classification of 7221-391-0?
FSC 5905 ⁓ Resistors
Excluding resistance wire.
NSN 5905-01-302-8936 RESISTOR,VARIABLE,WIRE WOUND,PRE
- NIIN
- 013028936
- NIIN Date
- 06/21/89
- Schedule B
- 8533390080
- Name Code
- 37408
- FIIG
- A002A0
- Item Weight
- 0.000lbs
- Item Dimensions
- --
- QUP
- 1
- Historical Price
- $365.73 EA
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- No precious metals
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Major End Users Countries and entities
- - Department of The Navy
Availability for 7221-391-0 A member of our team will provide you with a price and availability quote
Request a Quote »Shipping Information
- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- 77.5
- LCL (less than a car load rating)
- Unknown
- Special Cargo
- No special type of cargo code applicable
- Air Freight (Minimum cargo door size required)
- Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- Customs Requirement Classification
- Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)
- Commodity (for shipments via water)
- Communications/electronics, other than sigint/ew or comsec repair parts and components
- NMFC (national motor freight code)
- 062960 REOSTATS/PARTS NOI
- UFC (universal freight code)
- 35140
Similar by Design Other resistors with similar characteristics
Nothing similar to this part number was found in our inventory
7221-391-0 / Resistor,variable,wire wound,preWhat is the formal definition of this item?
A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. the functional tolerance (linearity) of the output is equal to or less than plus or munus 1 percent on linear outputs. specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. for items having manually positioned taps designed to be set and fixed prior to use, see resistor, adjustable, for items with step by step variation, see rheostat and resistor, step by step. for tandem-mounted items designed to function together as an attenuator (and rated accordingly), see attenuator, variable. excludes resistor (1), variable, nonwire wound, nonprecision; resistor (1), variable, nonwire wound, precision; and resistor (1), variable, wire wound, nonprecision.
