| It is important to select the motor that will help assure optimum performance of the equipment to be driven. To do this, a motor must be selected that is capable of starting the equipment, bringing it up to operating speed, and driving it at the necessary loading speed as long as required without excessive heating. The following motor specifications should be considered. |
|
Review the chart below to determine what category of motor is needed.
CATEGORY
|
COMMON APPLICATIONS |
COMMON MOTOR TYPES |
| General Purpose |
• Belt Drive Fans
• Belt Drive Blowers
• Pumps
• Conveyors
• Machine Tools
• Compressors
• Material Handling |
• Split Phase
• Capacitor Start
• Three Phase |
Definite /
Special Purpose |
• Washdown
• Hazardous Location
• Farm Duty
• Close Coupled Pump
• Fire Pump
• Pool & Spa Pump
• Elevator Duty
• Gate & Door
• Commercial Jet Pump
|
• Permanent Split
Capacitor
(PSC)
• Split Phase
• Capacitor Start
• Three Phase |
| HVAC |
• Condenser Fan
• Direct Drive Blower & Fan
• Belt Drive Blower & Fan
• Unit Heater
• Room AC / Fan Coil
• Evaporative Cooler
• Hot Water Circulator
• Oil Burner
• Unit Bearing
• Cooling Tower
• Refrigeration·
• Air-Circulating |
• PSC
• Shaded Pole
• Split Phase
• Capacitor Start
• Three Phase |
Tip: Some motors can be used for multiple applications
 NEMA (National Electrical Manufacturers Association) along with electric motor member companies established a NEMA Premium® energy efficiency motors program
to provide highly energy efficient products that meet the needs and applications of users based on a consensus definition of "premium efficiency" and use of the NEMA
Premium® logo for premium products.
Choosing a motor with the NEMA Premium® logo will identify higher efficient motors that will save money in total energy operating cost and improve system reliability.
For more information about the NEMA Premium® efficiency motor program, go to www.nema.org or premiummotors.com. |
|
Click to enlarge this image
Measurement of how much work is done in a specific amount of time. This value
indicates the power output of the motor and usually is specified as a fraction or in
a whole number. Small motors can be rated in watts.
Tip: Select a motor with equal or greater horsepower to the existing motor.
Tip: If no HP or Watt rating is available, amp draw (typically available on the
nameplate) provides the next best characteristic to sizing the motor.
Revolutions per minute (RPM) indicate how fast the motor shaft will rotate under the specified load (HP). Multi-speed motors can be rated either with the RPM and the number of speeds (1075/3-speed) or with the RPM for each speed. Poles and RPM are used interchangeably. Reference the chart below.
Poles |
Synchronous
RPM |
|
| 2 |
3600 |
3000-3450 |
| 4 |
1800 |
1625-1750 |
| 6 |
1200 |
1050-1140 |
| 8 |
900 |
825-850 |
Tip: Match RPM within 5% of nameplate RPM.
Tip: Remember that the horsepower (HP) rating of the motor only applies to the high
speed of a multi-speed motor. As the speed is reduced, the horsepower is reduced. |
|
Voltage is the power rating at which the motor is designed to operate. A motor should operate at plus or minus 10% of nameplate voltage. A 230 volt motor should
operate over a range of 207 volts to 253 volts. A slash (/) between listed voltages indicates there is a different connection for these voltages. A hyphen (-) between
voltages listed usually indicates the same connection is used for these voltages. (No plus or minus 10%.)
Tip: Match to supplied voltage.
Tip: If the supplied voltage is 115, and the replacement motor is 115/230, the motor will work, if connected for 115 volts.
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The term hertz or frequency was formally called “cycles” and is nearly always 60 hertz in the USA and Canadian applications Some foreign countries, especially Europe, use 50 hertz power supplies.
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Select the motor type based on typical characteristics and uses.
Motor Type |
HP Range |
Typical
Nameplate RPM |
Typical Characteristics |
Typical Uses |
Shaded Pole,
Single Phase |
Up to
1/2 HP |
Multi-Speed, 1050,
1550, 3000 |
• Low efficiency
• Not for belt drive as a rule
• Air over design usually required
• Always single voltage
• Non-reversible
• Low starting torque |
Small Fans and Blowers, Unit Heaters, Space Heaters, Humidifiers, Freezer Blowers, Window Fans, Floor Fans, Portable Evaporative Coolers |
|
Permanent Split
Capacitor (PSC),
Single Phase |
Up to
1 HP |
Multi-Speed, 825,
1075, 1625, 3250 |
• Improved efficiency vs. shaded pole
• Not for belt drive, as a rule
• Air over design usually required
• Typically single voltage
• Low starting torque |
Small Mounted Fans, Air Circulators, Blowers, Room AC and Central AC, Condenser Fans, Evaporator Fans,
Furnace Blowers, Unit Heaters, Window Fans, Oil Burners, Pool Pump, Door Operators, Animal Confinement Fans for: Poultry, Hogs, Cattle |
|
Split Phase,
Single Phase |
Up to
1 HP |
850, 1140,
1725, 3450 |
• Moderate efficiency
• Typically used in belt drive applications
• No capacitor needed for start-up
• Available in single voltage and dual voltage
• Generally reversible rotation
• Medium starting torque |
Belted Fans, Blowers, AC Fans, Blowers, Office Machines, Small Centrifugal Pumps, Home Appliances, Door Operators, Oil Burners, Poultry Feeders, Attic Fans, Furnace Blowers, Small Tools, Lathes |
|
Capacitor Start,
Single Phase
|
1/6 to
10 HP |
850, 1140,
1725, 3450 |
• Improved efficiency vs. split phase
• Typically used in belt drive applications
• Capacitor Required
• Available in single voltage and dual voltage
• Generally reversible rotation
• High starting torque |
Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders |
|
| Three Phase |
1/4 HP
and Up |
850, 1140,
1725, 3450 |
• High to Premium efficiency
• Used in belt drive and direct drive
applications
• Three phase power required
• Typically dual voltage
• Generally reversible rotation
• High starting torque |
Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders, Drying Fans, Gear Motors |
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| Environment |
Type |
Typical Description |
Clean, Dry, Indoor,
Non-Hazardous |
OAO - Open Air Over |
Vent openings in shell and/or end shields must be located in air stream to provide motor cooling. |
| |
ODP - Open Drip Proof |
Vent openings that are placed so drops of liquid falling within an angle of 15 degrees from vertical will
not affect performance. |
| |
TEFC - Totally
Enclosed Fan Cooled |
No vent openings in shell or end shield. Includes an external fan that blows cooling air over the motor frame. |
| Dirty, Damp, Outdoor, Non-Hazardous |
TENV - Totally Enclosed Non Vented |
No vent openings in shell or end shield. Depends on convection air for cooling. |
| |
TEAO - Totally
Enclosed Air Over |
No vent openings in shell or end shield. Depends on airflow from driven device for motor cooling. Must be loaded in air stream. |
Hazardous
Explosion-Proof |
TEFC/TENV |
No vent openings in shell or end shields. Designed to withstand an internal explosion of specified gases or vapors and not allow the internal flame or explosion to escape. |
Tip: A totally enclosed motor can replace an open motor assuming other characteristics meet the application requirements.
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Mounting is the way a motor mounts to the application. This is usually determined by the application itself, how the motor is to be used, and where it will be mounted. Below are some of the typical mounting configurations:
|
|
|
RESILIENT or CRADLE BASE
Motor is isolated from base by
rubber rings on the end shield |
RIGID or FOOTED BASE
Motor base is welded or bolted
directly to motor shell |
YOKE MOUNT
Tabs are welded to bottom of
motor shell for bolting to a fan
column or bracket |
|
|
|
|
C-FACE WITHOUT BASE
End shield has holes for mounting, with base |
C-FACE WITH BASE
End shield has holes for mounting
|
RING
Rubber rings on each end shield. No base |
|
|
|
|
STUD
Extended thru-bolts (studs) for mounting |
|
|
Tip: Many times the frame designation helps identify the way the motor is mounted (56C = C-Face)
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A temperature-sensing device built into the motor that shuts off the motor if the temperature becomes excessive due to failure-to-start or overloading.
Automatic Reset Thermal Overload Protector (auto) - after motor cools, thermal protector automatically restores power.
Should not be used where unexpected restarting would be hazardous.
Manual Reset Thermal Overload Protector (man) - An external button must be pushed to restore power to motor.
Preferred where unexpected restarting would be hazardous, as on saws, conveyors, compressors, etc.
If the motor does not have thermal protection, then the nameplate will be blank or will show non protected “none”.
Tip: It is important to match the thermal protection to the motor that is being replaced.
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Bearings support the rotating parts of the motor. They are usually either ball or sleeve.
Tip: Sleeve: Used on fractional HP motors with low to moderate loads. Ball: Used where a higher load capacity is required.
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A measure of the reserve margin built into a motor. Motors rated over 1.0 SF have more than normal margin, and are used where unusual conditions such as
occasional high or low voltage, momentary overloads, etc., are likely to occur.
Tip: Always match the service factor with the same or higher.
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The insulation class refers to the class of insulation and related components used in the
motor. These are rated by standard NEMA classifications according to the motor’s
maximum operating temperatures.
Class |
Total Temperature Of System |
A |
105°C (221°F) |
B |
130°C (266°F) |
F |
155°C (311°F) |
H |
180°C (356°F) |
Maximum Allowable Operating Temperature)
Tip: Keep in mind, each 10° C rise above the ratings can reduce the life of the motor by half.
Tip: Under normal conditions a replacement motor should have a class equal to or higher than the
original If the replacement is a lower rating it could cause premature failure
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Frame size is defined by NEMA (National Electrical Manufacturers Association). See NEMA Chart below.
NEMA Frame Suffix Code Chart
C = Face Mount
H = Has 2F dimension larger than same frame without H suffix
J = Face mount to fit jet pump
JM, JP = Face mount to fit close-coupled pumps
K = Has hub for sump pump mounting
M = Flange mount for oil burner (5 1/2"rabbet diameter)
N = Flange mount for oil burner (6 3/8" rabbet diameter)
T, TS = Integral HP motor dimension NEMA standards set in 1964
U = Integral HP motor dimension NEMA standards set in 1953
Y = Non-standard mounting, see manufacturers drawing
Z = Non-standard shaft extension
Example: 56C - 56(NEMA Frame Designation),
C(NEMA Frame Suffix Code) |
Tips
- If unsure of the frame size, measuring the shaft height is your best indicator to determine the
frame size of the motor
- Letters in front of the frame size number typically are ignored (manufacturer specific code)
- Letters after the frame size number are important in selecting the correct replacement motor
- Motors with frame designation that include Y and Z after the frame size, in most cases can be
replaced with a standard motor (Measure shaft and note mounting method to compare with
replacement motor)
- A 56HZ motor can be replaced by a 143T or 145T frame motor
|
|
JM Shaft
| |
Keyseat |
| Frame |
AH |
U |
EM |
EL |
EN |
AK |
R |
S |
| 143 |
4 1/4 |
7/8 |
1 |
15/32 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 145 |
4 1/4 |
7/8 |
1 |
15/32 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 182 |
4 1/4 |
7/8 |
1 |
1 1/4 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 184 |
4 1/4 |
7/8 |
1 |
1 1/4 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 213 |
4 1/4 |
7/8 |
1 |
1 1/4 |
3/8-16 x.75 |
8 1/2 |
49/64 |
3/16 |
| 215 |
4 1/4 |
7/8 |
1 |
1 1/4 |
3/8-16 x.75 |
8 1/2 |
49/64 |
3/16 |
| 254 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
8 1/2 |
1 7/64 |
1/4 |
| 256 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
8 1/2 |
1 7/64 |
1/4 |
| 284 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 286 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 324 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 326 |
5 1/4 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
|
JP Shaft
| |
Keyseat |
| Frame |
AH |
U |
EM |
EL |
EN |
AK |
R |
S |
| 143 |
7 5/16 |
7/8 |
1 |
15/32 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 145 |
7 5/16 |
7/8 |
1 |
15/32 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 182 |
7 5/16 |
7/8 |
1 |
1 1/4 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 184 |
7 5/16 |
1 1/4 |
1 |
1 1/4 |
3/8-16 x.75 |
4 1/2 |
49/64 |
3/16 |
| 213 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
3/8-16 x.75 |
8 1/2 |
1 7/64 |
1/4 |
| 215 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
3/8-16 x.75 |
8 1/2 |
1 7/64 |
1/4 |
| 254 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
8 1/2 |
1 7/64 |
1/4 |
| 256 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
8 1/2 |
1 7/64 |
1/4 |
| 284 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 286 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 324 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 326 |
8 1/8 |
1 1/4 |
1 3/8 |
1 3/4 |
1/2-13 x 1.00 |
12 1/2 |
1 7/64 |
1/4 |
| 364 |
8 1/8 |
1 5/8 |
1 3/4 |
2 1/8 |
1/2-13 x 1.00 |
12 1/2 |
1 13/32 |
3/8 |
| 365 |
8 1/8 |
1 5/8 |
1 3/4 |
2 1/8 |
1/2-13 x 1.00 |
12 1/2 |
1 13/32 |
3/8 |
|
|
|
Type C-Face AC Motors, Footed or Footless
| |
BF Hole |
|
Keyseat |
| Frame Designation |
AJ |
AK |
BA |
BB Min. |
BC |
BD Max. |
Number |
Tap
Size |
Bolt Penetration
Allowance |
U |
AH |
R |
S |
| 42C |
3 3/4 |
3 |
2 1/16 |
1/8 |
-0.19 |
5 |
4 |
1/4-20 |
- |
3/8 |
1 5/16 |
2 1/64 |
flat |
| 48C |
3 3/4 |
3 |
2 1/2 |
1/8 |
-0.19 |
5 5/8 |
4 |
1/4-20 |
- |
1/2 |
1 11/16 |
2 9/64 |
flat |
| 56C |
5 7/8 |
4 1/2 |
2 3/4 |
1/8 |
-0.19 |
6 1/2 |
4 |
3/8-16 |
- |
5/8 |
2 1/16 |
3 3/64 |
3/16 |
| 143TC & 145TC |
5 7/8 |
4 1/2 |
2 3/4 |
1/8 |
+0.12 |
6 1/2 |
4 |
3/8-16 |
9/16 |
7/8 |
2 1/8 |
49/64 |
3/16 |
| 182TC & 184TC |
7 1/4 |
8 1/2 |
3 1/2 |
1/4 |
+0.12 |
9 |
4 |
1/2-13 |
3/4 |
1 1/8 |
2 5/8 |
63/64 |
1/4 |
| 182TCH & 184TCH |
5 7/8 |
8 1/2 |
3 1/2 |
1/8 |
+0.12 |
6 1/2 |
4 |
3/8-16 |
9/16 |
1 1/8 |
2 5/8 |
63/64 |
1/4 |
| 213TC & 215TC |
7 1/4 |
4 1/2 |
4 1/4 |
1/4 |
+0.12 |
9 |
4 |
1/2-13 |
3/4 |
1 3/8 |
3 1/8 |
1 13/64 |
5/16 |
| 254TC & 256TC |
7 1/4 |
8 1/2 |
4 3/4 |
1/4 |
+0.25 |
10 |
4 |
1/2-13 |
3/4 |
1 5/8 |
3 3/4 |
1 13/32 |
3/8 |
| 284TC & 286TC |
9 |
8 1/2 |
4 3/4 |
1/4 |
+0.25 |
11 1/4 |
4 |
1/2-13 |
3/4 |
1 7/8 |
4 3/8 |
1 19/32 |
1/2 |
| 284TSC & 286TSC |
9 |
10 1/2 |
4 3/4 |
1/4 |
+0.25 |
11 1/4 |
4 |
1/2-13 |
3/4 |
1 5/8 |
3 |
1 13/32 |
3/8 |
| 324TC & 326TC |
11 |
10 1/2 |
5 1/4 |
1/4 |
+0.25 |
14 |
4 |
5/8-11 |
15/16 |
2 1/8 |
5 |
1 27/32 |
1/2 |
| 324TSC & 326TSC |
11 |
12 1/2 |
5 1/4 |
1/4 |
+0.25 |
14 |
4 |
5/8-11 |
15/16 |
1 7/8 |
3 1/2 |
1 19/32 |
1/2 |
| 364TC & 365TC |
11 |
12 1/2 |
5 7/8 |
1/4 |
+0.25 |
14 |
4 |
5/8-11 |
15/16 |
2 3/8 |
5 5/8 |
2 1/64 |
5/8 |
| 364TSC & 365TSC |
11 |
12 1/2 |
5 7/8 |
1/4 |
+0.25 |
14 |
8 |
5/8-11 |
15/16 |
1 7/8 |
3 1/2 |
1 19/32 |
1/2 |
| 404TC & 405TC |
11 |
12 1/2 |
6 5/8 |
1/4 |
+0.25 |
15 1/2 |
8 |
5/8-11 |
15/16 |
2 7/8 |
7 |
2 29/64 |
3/4 |
| 404TSC & 405TSC |
11 |
121/2 |
6 5/8 |
1/4 |
+0.25 |
15 1/2 |
8 |
5/8-11 |
15/16 |
2 1/8 |
4 |
1 27/32 |
1/2 |
| 444TC & 445TC |
14 |
16 |
7 1/2 |
1/4 |
+0.25 |
18 |
8 |
5/8-11 |
15/16 |
3 3/8 |
8 1/4 |
2 7/8 |
7/8 |
| 444TSC & 445TSC |
14 |
16 |
7 1/2 |
1/4 |
+0.25 |
18 |
8 |
5/8-11 |
15/16 |
2 3/8 |
4 1/2 |
2 1/64 |
5/8 |
| 447TC & 449TC |
14 |
16 |
7 1/2 |
1/4 |
+0.25 |
18 |
8 |
5/8-11 |
15/16 |
3 3/8 |
8 1/4 |
2 7/8 |
7/8 |
| 447TSC & 449TSC |
14 |
16 |
7 1/2 |
1/4 |
+0.25 |
18 |
8 |
5/8-11 |
15/16 |
2 3/8 |
4 1/2 |
2 1/64 |
5/8 |
| 5000 Frame Series |
14 1/2 |
16 1/2 |
- |
1/4 |
+0.25 |
18 |
4 |
5/8-11 |
15/16 |
- |
- |
- |
- |
|
|
|
| AC Foot-Mounted Motors with Single Straight Shaft Extension |
Frame
Designation |
|
Keyseat |
|
A Max. |
D |
E |
2F |
BA |
H |
U |
N-W |
V Min. |
R |
S |
AA Min. |
| 42 |
- |
2 5/8 |
1 3/4 |
1 11/16 |
2 1/16 |
9/32 slot |
3/8 |
1 1/8 |
- |
2 1/64 |
flat |
- |
| 48 |
- |
3 |
2 1/8 |
2 3/4 |
2 1/2 |
11/32 slot |
1/2 |
1 1/2 |
- |
2 9/64 |
flat |
- |
| 48H |
- |
3 |
2 1/8 |
4 3/4 |
2 1/2 |
11/32 slot |
1/2 |
1 1/2 |
- |
29/64 |
flat |
- |
| 56 |
- |
3 1/2 |
2 7/16 |
3 |
2 3/4 |
11/32 slot |
5/8 |
1 7/8 |
- |
33/64 |
3/16 |
- |
| 56H |
- |
3 1/2 |
2 7/16 |
5 |
2 3/4 |
11/32 slot |
5/8 |
1 7/8 |
- |
33/64 |
3/16 |
- |
| 143T |
7 |
3 1/2 |
2 3/4 |
4 |
2 1/4 |
11/32 hole |
7/8 |
2 1/4 |
2 |
49/64 |
3/16 |
3/4 |
| 145T |
7 |
3 1/2 |
2 3/4 |
5 |
2 1/4 |
11/32 hole |
7/8 |
2 1/4 |
2 |
49/64 |
3/16 |
3/4 |
| 182 |
9 |
4 1/2 |
3 3/4 |
4 1/2 |
2 3/4 |
13/32 hole |
7/8 |
2 1/4 |
2 |
49/64 |
3/16 |
3/4 |
| 184 |
9 |
4 1/2 |
3 3/4 |
5 1/2 |
2 3/4 |
13/32 hole |
7/8 |
2 1/4 |
2 |
49/64 |
3/16 |
3/4 |
| 182T |
9 |
4 1/2 |
3 3/4 |
4 1/2 |
2 3/4 |
13/32 hole |
1 1/8 |
2 3/4 |
2 1/2 |
63/64 |
2 1/2 |
3/4 |
| 184T |
9 |
4 1/2 |
3 3/4 |
5 1/2 |
2 3/4 |
13/32 hole |
1 1/8 |
2 3/4 |
2 1/2 |
63/64 |
2 1/2 |
3/4 |
| 213 |
10 1/2 |
5 1/4 |
4 1/4 |
5 1/2 |
3 1/2 |
13/32 hole |
1 1/8 |
3 |
2 3/4 |
63/64 |
2 1/2 |
3/4 |
| 215 |
10 1/2 |
5 1/4 |
4 1/4 |
7 |
3 1/2 |
13/32 hole |
1 1/8 |
3 |
2 3/4 |
63/64 |
2 1/2 |
3/4 |
| 213T |
10 1/2 |
5 1/4 |
4 1/4 |
5 1/2 |
3 1/2 |
13/32 hole |
1 3/8 |
3 3/8 |
3 1/8 |
1 13/64 |
5/16 |
1 |
| 215T |
10 1/2 |
5 1/4 |
4 1/4 |
7 |
3 1/2 |
13/32 hole |
1 3/8 |
3 3/8 |
3 1/8 |
1 13/64 |
5/16 |
1 |
| 254U |
12 1/2 |
6 1/4 |
5 |
8 1/4 |
4 1/4 |
17/32 hole |
1 3/8 |
3 3/4 |
3 1/2 |
1 13/64 |
5/16 |
1 |
| 256U |
12 1/2 |
6 1/4 |
5 |
10 |
4 1/4 |
17/32 hole |
1 3/8 |
3 3/4 |
3 1/2 |
1 13/64 |
5/16 |
1 |
| 254T |
12 1/2 |
6 1/4 |
5 |
8 1/4 |
4 1/4 |
17/32 hole |
1 5/8 |
4 |
3 3/4 |
1 13/32 |
3/8 |
1 1/4 |
| 256T |
12 1/2 |
6 1/4 |
5 |
10 |
4 1/4 |
17/32 hole |
1 5/8 |
4 |
3 3/4 |
1 13/32 |
3/8 |
1 1/4 |
| 284U |
14 |
7 |
5 1/2 |
9 1/2 |
4 3/4 |
17/32 hole |
1 5/8 |
4 7/8 |
4 5/8 |
1 13/32 |
3/8 |
1 1/4 |
| 286U |
14 |
7 |
5 1/2 |
11 |
4 3/4 |
17/32 hole |
1 5/8 |
4 7/8 |
4 5/8 |
1 13/32 |
3/8 |
1 1/4 |
| 284T |
14 |
7 |
5 1/2 |
9 1/2 |
4 3/4 |
17/32 hole |
1 7/8 |
4 5/8 |
4 3/8 |
1 19/32 |
1/2 |
1 1/2 |
| 286T |
14 |
7 |
5 1/2 |
11 |
4 3/4 |
17/32 hole |
1 7/8 |
4 5/8 |
4 3/8 |
1 19/32 |
1/2 |
1 1/2 |
| 284TS |
14 |
7 |
5 1/2 |
9 1/2 |
4 3/4 |
17/32 hole |
1 5/8 |
3 1/4 |
3 |
1 13/32 |
3/8 |
1 1/2 |
| 286TS |
14 |
7 |
5 1/2 |
11 |
4 3/4 |
17/32 hole |
1 5/8 |
3 1/4 |
3 |
1 13/32 |
3/8 |
1 1/2 |
| 324U |
16 |
8 |
6 1/4 |
10 1/2 |
5 1/4 |
21/32 hole |
1 7/8 |
5 5/8 |
5 3/8 |
1 19/32 |
1/2 |
1 1/2 |
| 326U |
16 |
8 |
6 1/4 |
12 |
5 1/4 |
21/32 hole |
1 7/8 |
5 5/8 |
5 3/8 |
1 19/32 |
1/2 |
1 1/2 |
| 324US |
16 |
8 |
6 1/4 |
10 1/2 |
5 1/4 |
21/32 hole |
1 5/8 |
3 1/4 |
3 |
1 13/32 |
3/8 |
1 1/2 |
| 326US |
16 |
8 |
6 1/4 |
12 |
5 1/4 |
21/32 hole |
1 5/8 |
3 1/4 |
3 |
1 13/32 |
3/8 |
1 1/2 |
| 324T |
16 |
8 |
6 1/4 |
10 1/2 |
5 1/4 |
21/32 hole |
2 1/8 |
5 1/4 |
5 |
1 27/32 |
1/2 |
2 |
| 326T |
16 |
8 |
6 1/4 |
12 |
5 1/4 |
21/32 hole |
2 1/8 |
5 1/4 |
5 |
1 27/32 |
1/2 |
2 |
| 324TS |
16 |
8 |
6 1/4 |
10 1/2 |
5 1/4 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
2 |
| 326TS |
16 |
8 |
6 1/4 |
12 |
5 1/4 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
2 |
| 364U |
18 |
9 |
7 |
11 1/4 |
5 7/8 |
21/32 hole |
2 1/8 |
6 3/8 |
6 1/8 |
1 27/32 |
1/2 |
2 |
| 365U |
18 |
9 |
7 |
12 1/4 |
5 7/8 |
21/32 hole |
2 1/8 |
6 3/8 |
6 1/8 |
1 27/32 |
1/2 |
2 |
| 364US |
18 |
9 |
7 |
11 1/4 |
5 7/8 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
2 |
| 365US |
18 |
9 |
7 |
12 1/4 |
5 7/8 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
2 |
| 364T |
18 |
9 |
7 |
11 1/4 |
5 7/8 |
21/32 hole |
2 3/8 |
5 7/8 |
5 5/8 |
2 1/64 |
5/8 |
3 |
| 365T |
18 |
9 |
7 |
12 1/4 |
5 7/8 |
21/32 hole |
2 3/8 |
5 7/8 |
5 5/8 |
2 1/64 |
5/8 |
3 |
| 364TS |
18 |
9 |
7 |
11 1/4 |
5 7/8 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
3 |
| 365TS |
18 |
9 |
7 |
12 1/4 |
5 7/8 |
21/32 hole |
1 7/8 |
3 3/4 |
3 1/2 |
1 19/32 |
1/2 |
3 |
| 405U |
20 |
10 |
8 |
13 3/4 |
6 5/8 |
13/16 hole |
2 3/8 |
7 1/8 |
6 7/8 |
2 1/64 |
5/8 |
2 |
| 404US |
20 |
10 |
8 |
12 1/4 |
6 5/8 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 7/8 |
1/2 |
2 |
| 405US |
20 |
10 |
8 |
13 3/4 |
6 5/8 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 7/8 |
1/2 |
2 |
| 404T |
20 |
10 |
8 |
13 3/4 |
6 5/8 |
13/16 hole |
2 7/8 |
7 1/4 |
7 |
2 29/64 |
3/4 |
3 |
| 405T |
20 |
10 |
8 |
12 1/4 |
6 5/8 |
13/16 hole |
2 7/8 |
7 1/4 |
7 |
2 29/64 |
3/4 |
3 |
| 404TS |
20 |
10 |
8 |
13 3/4 |
6 5/8 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 27/32 |
1/2 |
3 |
| 405TS |
20 |
10 |
8 |
12 1/4 |
6 5/8 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 27/32 |
1/2 |
3 |
| 444U |
22 |
11 |
9 |
13 3/4 |
7 1/2 |
13/16 hole |
2 7/8 |
8 5/8 |
8 3/8 |
2 29/64 |
3/4 |
2 1/2 |
| 445U |
22 |
11 |
9 |
14 1/2 |
7 1/2 |
13/16 hole |
2 7/8 |
8 5/8 |
8 3/8 |
2 29/64 |
3/4 |
2 1/2 |
| 444US |
22 |
11 |
9 |
16 1/2 |
7 1/2 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 27/32 |
1/2 |
2 1/2 |
| 445US |
22 |
11 |
9 |
14 1/2 |
7 1/2 |
13/16 hole |
2 1/8 |
4 1/4 |
4 |
1 27/32 |
1/2 |
2 1/2 |
| 444T |
22 |
11 |
9 |
16 1/2 |
7 1/2 |
13/16 hole |
3 3/8 |
8 1/2 |
8 1/4 |
2 7/8 |
7/8 |
3 |
| 445T |
22 |
11 |
9 |
14 1/2 |
7 1/2 |
13/16 hole |
3 3/8 |
8 1/2 |
8 1/4 |
2 7/8 |
7/8 |
3 |
| 447T |
22 |
11 |
9 |
16 1/2 |
7 1/2 |
13/16 hole |
3 3/8 |
8 1/2 |
8 1/4 |
2 7/8 |
7/8 |
3 |
| 449T |
22 |
11 |
9 |
20 |
7 1/2 |
13/16 hole |
3 3/8 |
8 1/2 |
8 1/4 |
2 7/8 |
7/8 |
3 |
| 444TS |
22 |
11 |
9 |
25 |
7 1/2 |
13/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
3 |
| 445TS |
22 |
11 |
9 |
14 1/2 |
7 1/2 |
13/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
3 |
| 447TS |
22 |
11 |
9 |
16 1/2 |
7 1/2 |
13/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
3 |
| 449TS |
22 |
11 |
9 |
20 |
7 1/2 |
13/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
3 |
| 5004 |
25 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
3 7/8 |
11 5/8 |
11 1/4 |
3 5/16 |
1 |
- |
| 5004G |
25 |
12 1/2 |
10 |
16 |
8 1/2 |
15/16 hole |
3 1/2 |
10 1/2 |
10 1/4 |
3 |
7/8 |
- |
| 5004S |
25 |
12 1/2 |
10 |
16 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5004SS |
25 |
12 1/2 |
10 |
16 |
8 1/2 |
15/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
- |
| 5006L |
28 1/2 |
12 1/2 |
10 |
16 |
8 1/2 |
15/16 hole |
4 7/8 |
14 5/8 |
14 3/8 |
4 11/64 |
1 1/4 |
- |
| 5006S |
28 1/2 |
12 1/2 |
10 |
20 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5006MS |
28 1/2 |
12 1/2 |
10 |
20 |
8 1/2 |
15/16 hole |
3 3/8 |
6 3/4 |
6 1/2 |
2 7/8 |
7/8 |
- |
| 5008 |
25 |
12 1/2 |
10 |
20 |
8 1/2 |
15/16 hole |
3 7/8 |
11 5/8 |
11 1/4 |
3 5/16 |
1 |
- |
| 5008G |
25 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
3 1/2 |
10 1/2 |
10 1/4 |
3 |
7/8 |
- |
| 5008L |
28 1/2 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
4 7/8 |
14 5/8 |
14 3/8 |
4 11/64 |
1 1/4 |
- |
| 5008S |
25 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5008S |
28 1/2 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5008MS |
28 1/2 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
3 3/8 |
6 3/4 |
6 1/2 |
2 7/8 |
7/8 |
- |
| 5008SS |
25 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
- |
| 5008SS |
28 1/2 |
12 1/2 |
10 |
25 |
8 1/2 |
15/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
- |
| 5010L |
28 1/2 |
12 1/2 |
10 |
32 |
8 1/2 |
15/16 hole |
4 7/8 |
14 5/8 |
14 3/8 |
4 11/64 |
1 1/4 |
- |
| 5010S |
28 1/2 |
12 1/2 |
10 |
32 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5010MS |
28 1/2 |
12 1/2 |
10 |
32 |
8 1/2 |
15/16 hole |
3 3/8 |
6 3/4 |
6 1/2 |
2 7/8 |
7/8 |
- |
| 5010SS |
28 1/2 |
12 1/2 |
10 |
32 |
8 1/2 |
15/16 hole |
2 3/8 |
4 3/4 |
4 1/2 |
2 1/64 |
5/8 |
- |
| 5012L |
28 1/2 |
12 1/2 |
10 |
40 |
8 1/2 |
15/16 hole |
4 7/8 |
14 5/8 |
14 3/8 |
4 11/64 |
1 1/4 |
- |
| 5012S |
28 1/2 |
12 1/2 |
10 |
40 |
8 1/2 |
15/16 hole |
2 7/8 |
5 3/4 |
5 1/2 |
2 29/64 |
3/4 |
- |
| 5012MS |
28 1/2 |
12 1/2 |
10 |
40 |
8 1/2 |
15/16 hole |
3 3/8 |
6 3/4 |
6 1/2 |
2 7/8 |
7/8 |
- |
|
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3M Products
Motors - The Basics Of Motors
