Farm Duty Motors

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Farm duty motors work well in harsh & rugged operations and are ideal for agricultural settings. They feature enclosures that protect them from moisture. These motors are suitable for...Read more

DAYTON -

Farm Duty AC Motors, Rigid Base Mounting

Dayton farm duty motors are ideal for producing high starting torque in various applications including aeration fans, conveyors, silo unloaders, barn cleaners, compressors and manure pumps. These units have steel construction with green coated finish for strength & durability. These units come equipped with ball bearings for smooth & continuous operation and have totally enclosed fan cooled (TEFC) enclosures for withstanding dusty and rough environments, as well as keeping away moisture. They further include shaft slingers and gasketed conduit boxes, protecting motor components against harsh weather conditions and ingress of contaminants. Choose from an array of these agricultural motors, available in motor power outputs ranging from 1/3 to 10 hp.

StyleModelFrameFull Load AmpsHPInsulation ClassMotor DesignMotor Mounting PositionNameplate RPMService FactorPrice (ex. VAT)
A6K7195611.4/5.73/4BCapacitor-StartAll Angle17251.15€555.42
B6K710566.6/3.31/3BCapacitor-StartAll Angle17251.15€412.17
C6K714569.0/4.51/2FCapacitor-StartAll Angle17251.15€549.77
D6K74056H16.2/8.11.5BCapacitor-Start/RunAll Angle17251.15€567.93
E6K72756H14.0/7.01FCapacitor-StartAll Angle17251.15€579.41
F4K09056HZ20/102FCapacitor-Start/RunAll Angle17251.00€699.19
G6K886143T19.2/10.11.5FCapacitor-Start/RunHorizontal17251.15€683.64
H6K994143T15.0/7.51FCapacitor-StartAll Angle17251.15€664.11
I6K311145T16.2/8.11.5BCapacitor-Start/RunHorizontal17251.15€692.14
J6K313182T23.6/11.82FCapacitor-StartHorizontal17401.00€1,235.64
K6K887182TZ25.6/12.82FCapacitor-Start/RunHorizontal17501.15€1,449.64
L6K610184T14.53FCapacitor-StartHorizontal17401.00€1,469.07
M6K881184T17.03FCapacitor-Start/RunHorizontal17601.15€1,716.35
N6K882184T24.05FCapacitor-Start/RunHorizontal17401.15€1,650.68
O6K847184T22.05FCapacitor-Start/RunHorizontal17401.00€1,314.04
P6K130213T23.05FCapacitor-Start/RunHorizontal17301.00€2,028.64
Q6K885215T41.010FCapacitor-Start/RunHorizontal17351.15€2,988.80
R6K969215T30.07.5FCapacitor-Start/RunHorizontal17401.00€2,439.84
S6K970215T38.010FCapacitor-Start/RunHorizontal17301.00€2,974.25
T6K883215TZ29.05FCapacitor-Start/RunHorizontal17251.15-
RFQ
Q6K884215TZ30.87.5FCapacitor-Start/RunHorizontal17201.15€2,743.46
DAYTON -

Farm Duty AC Motors, 1 Hp, Single Phase Design

Dayton farm duty motors are used for generating high starting torque in various applications including aeration fans, conveyors, silo unloaders, barn cleaners, compressors and manure pumps. These units have steel construction with green coated finish for strength & durability. They come equipped with ball bearings for smooth & continuous operation and have totally enclosed air over (TEAO) enclosures for withstanding dusty and rough environments, as well as keeping away moisture. They further include shaft slinger and gasketed conduit boxes to protect motor components against weather conditions and ingress of contaminants. Choose from an array of these agricultural fan motors, available in lengths (less shaft) of 10 and 10.375 inches.

StyleModelFull Load AmpsLength Less ShaftPrice (ex. VAT)
A3K9937.6/4.010"€484.44
B4K1247.9/4.010.375"€526.21
DAYTON -

Capacitor-Start/Capacitor-Run Poultry Fan Motors

Dayton poultry fan motors are designed for adjusting and maintaining airflow in poultry and livestock barns. These motors feature capacitor start / run design for drawing less current and ball bearings to reduce friction and allow smooth movement of components within the system. They further include a gasket terminal access cover which acts as an enclosure to protect against rain or windblown dust and a shaft key that connects rotating machine components to the shaft and enables proper torque transmission. Choose from a wide range of these fan motors, available in green epoxy and baked enamel finish variants.

StyleModelFinishFull Load AmpsHPLength Less ShaftMountingOverall LengthService FactorPrice (ex. VAT)
A4WNZ6-7.2/3.8-3.63/49 11/16"Base-1.30€510.09
B4WNZ5Baked Enamel7.2/3.8-3.63/410.875"Cradle11 13/16"1.30€464.74
C5JKW9Green Epoxy6.0/3.2-3.01/28.5"Cradle10.375"1.4€598.65
CENTURY -

Capacitor-Start/Capacitor-Run Poultry Fan Motors

StyleModelMountingPrice (ex. VAT)
APD6104AV3Base€593.34
BPD6104AV2Cradle€692.58
DAYTON -

Capacitor Start Auger Drive Motors

Dayton capacitor start auger drive motors are used for powering grain augers found in poultry raising operations. These motors feature frames made of rolled steel for structural rigidity and resisting corrosion on exposed surfaces. They have totally enclosed fan-cooled enclosures to prevent overheating of the motor, and are equipped with ball bearings for low rotational friction while running at a maximum speed of 1725 rpm. These motors allow flange / base mounting for easy installation, and are available in 1/2, 3/4 & 1 hp variants.

StyleModelFinishFrameFull Load AmpsHPHzLength Less ShaftMotor Shaft DesignMountingPrice (ex. VAT)
A3K995-56YZ7.2/3.61/250/60-FlatFlange€392.37
B3K996-56YZ9.1/4.63/450/60-FlatFlange€483.11
C5K044-56YZ7.2/3.61/250/60-FlatFlange/Base€445.67
D4K997Dayton Farm Duty green56Y12.6/6.316010 13/16"KeyedFlange/Base€507.83
E5K046Green Baked On Enamel56YZ9.1/4.63/450/6010 27/32"FlatFlange/Base€518.80
DAYTON -

Split Phase Auger Drive Motors

Dayton split phase auger drive motors are used with augers, conveyors, manure pumps and poultry equipment. These motors feature rolled steel frames ensuring corrosion resistance, and totally enclosed non ventilated enclosures to prevent the ingress of dust & water. They come integrated with ball bearings for reduced rotational friction while delivering speeds up to 1725 rpm, and are capable of withstanding ambient temperatures up to 40 degrees C.

StyleModelMountingPrice (ex. VAT)
A3K994Flange€352.12
B5K043Flange/Base€372.23
DAYTON -

Aeration Fan Motors, Split Phase, 115 / 230V AC

Dayton aeration fan motors are ideal for use in high-torque applications under continuous duty cycle like barn cleaners, conveyors, manure pumps, silo unloaders and compressors. These motors have rolled steel frame for strength and durability. They feature high-torque design with a keyed motor shaft that rotates clockwise or counter-clockwise to allow the motor to start under heavy load conditions. They have totally enclosed air-over motor enclosure design for blowing air over the motor rather than allowing outside air to freely circulate through the interior of the motor, thereby cooling the motor and keeping them free of contamination. These motors have a rigid or cradle base for mounting them horizontally or vertically. They offer automatic thermal protection to start or stop the fan operation according to permissible ambient temperatures for protecting the fan motors. Choose from a wide range of these motors, available in power outputs of 1/3, 1/2, 3/4 and 1 hp.

StyleModelFinishFull Load AmpsHPLength Less ShaftMotor Mounting PositionMotor Sub ApplicationMountingMounting PositionPrice (ex. VAT)
A1YBV1Dayton Gray13.4/6.719.75"All AngleAeration FansBaseHorizontal or Vertical€490.02
B1YBV8Dayton Gray6.8/3.41/29.125"All AngleAeration FansBaseHorizontal or Vertical€364.33
C1YBV9Dayton Gray6.8/3.41/29.125"HorizontalAeration FansCradleHorizontal€506.89
D1YBW1Dayton Gray6.8/3.41/29.125"All AnglePoultry FansCradle/StudHorizontal€498.80
E1YBU8Gray5.0/2.51/39.125"All AngleAeration FansBaseHorizontal or Vertical€421.61
F1YBU9Gray9.8/4.93/49.5"All AngleAeration FansBaseHorizontal or Vertical€411.80
BALDOR MOTOR -

Extra High Torque Farm Duty Motors, C-Face Footless, Single Phase

StyleModelAmpsBreak-down TorqueFrameHPNo-load CurrentOutputPower FactorRevisionPrice (ex. VAT)
AVFDL3516TM8.6-8.314.5 LB-FT145TC21.4 Amps299F€1,689.09
AVFDL3610TM15.532 LB-FT184TC310.7 Amps376Q€2,288.20
BVFDL3612TM2343 LB-FT184TC510 Amps588B€2,794.06
DAYTON -

Aeration Fan Motors, Permanent Split Capacitors

Dayton aeration fan motors are used in high torque installations such as silo unloaders, conveyors, compressors, barn cleaners and manure pumps, enabling them to start under heavy load conditions. They feature rolled steel frame construction to resist corrosion and have totally enclosed air over enclosures to protect against dampness & airborne particles. These UL recognised motors have a permanent split capacitor design for high efficiency and a rigid base for balanced load distribution. They include capacitor covers, gasketed conduit boxes and rubber boots over the manual protector reset buttons to seal the motor against contaminants & weather. These CSA certified motors have shaft slingers to seal & protect shaft bearings by blocking dust & other particles, while retaining lubricants. The integrated ball bearings increase motor performance and operate on a continuous duty cycle to deliver constant power to machinery & tools, without experiencing downtime. They mount horizontally or at all angle positioning and offer cradle / stud / yoke mounting types. Choose from a broad range of these motors, available in torque speeds of 1/2, 1/3 and 1/4 hp.

StyleModelFull Load AmpsHPLength Less ShaftMotor Mounting PositionMountingMounting PositionNameplate RPMOverall LengthPrice (ex. VAT)
A1YAZ43.4/1.71/47"HorizontalCradle/StudHorizontal17009.5"€289.11
B1YAZ73.4/1.71/47"All AngleYokeAll Angle17009.5"€362.02
C1YAZ53.6/1.81/37"HorizontalCradle/StudHorizontal17259.5"€303.65
D1YAZ83.6/1.81/37"All AngleYokeAll Angle17259.5"€333.41
E1YAZ65.5/2.81/28.375"HorizontalCradle/StudHorizontal170010.875"€346.39
F1YAZ95.5/2.81/28.375"All AngleYokeAll Angle170010.875"€380.69
DAYTON -

Agricultural & Poultry Fan Motors, Permanent Split Capacitor

Dayton agricultural fan motors or poultry fan motors feature high starting torque to start under heavy loads. They provide reliable performance in rough & dirty environments, and are ideal for poultry equipment, crop drying, manure pumps, conveyors & augurs. These CSA certified motors feature rolled steel frame construction to resist corrosion and have totally enclosed, air-over enclosures to protect against dampness & airborne particles. They are equipped with ball bearings to increase motor performance, thereby preventing lubricant leaks. These UL listed motors have a rigid base and permanent split capacitor design for load distribution & high efficiency, respectively. They include extended thru bolts, shaft adapters, gasketed capticator covers & shaft slingers, and operate on continuous duty cycle to deliver constant power to the machinery & tools, without experiencing downtime. Choose from a wide range of these motors, available in stud, base and face mounting styles.

StyleModelFrameFull Load AmpsHPInsulation ClassLength Less ShaftMotor Shaft DesignMountingMounting PositionPrice (ex. VAT)
A1YAZ348Y6.0/3.01/2B8.187"KeyedStudHorizontal or Vertical€403.41
B1YBA448Y3.6/1.81/3B6.25"Double-FlatBaseHorizontal or Vertical€728.52
C1YBA548Y3.6/1.81/3B6.25"Double-FlatStudHorizontal or Vertical€324.98
D1YBA156CZ5.81F11.875"KeyedFaceAll Angle€623.01
E1YBA756CZ5.81F11.875"KeyedFaceAll Angle€787.38
F1YBA656Z6.6/3.31/2B9.5"KeyedBaseHorizontal or Vertical€670.37
DAYTON -

Capacitor Start General Purpose Farm Duty Motors

Dayton capacitor-start general purpose farm duty motors are used to power silo unloaders, barn cleaners, conveyors, compressors and manure pumps. They feature a totally enclosed fan-cooled enclosure to prevent motor heating and are integrated with ball bearings for less rotational friction while running at a maximum speed of 1740 rpm. These motors have green baked enamel finish for corrosion resistance, and are available in shaft diameters of 5/8 & 7/8 inches.

StyleModelFrameFull Load AmpsHPLength Less ShaftMotor DesignOverall LengthShaft Dia.Shaft LengthPrice (ex. VAT)
A1TMW556C8.8/4.41/29 15/16"Capacitor-Start11 13/16"5/8"2 1/16"€444.26
B1TMW356C6.6/3.31/39 15/16"Capacitor-Start11 13/16"5/8"2 1/16"€534.26
C1TMW756C11.0/5.53/410.437"Capacitor-Start12 5/16"5/8"2 1/16"€542.07
D1TMW956HC13.4/6.7110 15/16"Capacitor-Start12 13/16"5/8"2 1/16"€661.20
E1TMX256HC15.2/7.61.511 15/16"Capacitor-Start/Run13 13/16"5/8"2 1/16"€720.46
F1TMW2145TC18.8/9.4212.75"Capacitor-Start14.8757/8"2.125"€944.68
DAYTON -

General Purpose Farm Duty Motors, 3 Phase

Dayton general-purpose farm-duty motors are ideal for use in high-torque applications like air compressors, augers, pumps, conveyors and other farm equipment. These 3-phase motors have greater efficiency than single-phase motors of similar specifications and do not need running / starting capacitors or centrifugal starting switches that fail or wear out. They have rolled steel frame for strength and durability and keyed motor shafts to rotate clockwise or counter-clockwise for continuous duty cycles. These motors feature totally enclosed fan-cooled enclosure design for cooling the motor and protecting them from moisture. They have a rigid base for all angle / horizontal mounting. Choose from a wide range of these motors, available in power outputs ranging from 1/3 to 10 hp.

StyleModelFinishFrameFull Load AmpsHPHzInsulation ClassLength Less ShaftMotor Mounting PositionPrice (ex. VAT)
A35Z916Dayton Grey143T3.2-3.2/1.6150/60F10.5"Horizontal€1,021.51
B35Z917Dayton Grey145T4.6-4.8/2.41.550/60F11"Horizontal€898.54
C35Z918Dayton Grey145T6.0-5.8/2.9250/60F12"Horizontal€814.60
D35Z919Dayton Grey182T8.4-7.8/3.9360F11.125"Horizontal€1,372.14
E35Z920Dayton Grey184T13.8-12.6/6.3560F12.125"Horizontal€1,840.30
F35Z921Dayton Grey213T22.4-25.2/12.67.550/60F15.25"Horizontal€1,804.99
G35Z922Dayton Grey215T28.8-26.8/13.41050/60F16.25"Horizontal€2,265.12
H1EJR3Gray561.2-1.2/0.61/360B9.125"All Angle€428.41
H1EJR5Gray562.4-2.4/1.23/460B9.125"All Angle€515.58
I1EJR4Gray561.6-1.8/0.91/260B9.125"All Angle€451.33
StyleModelAmpsBreak-down TorqueFrameHPInsulationNo-load CurrentOutputPower FactorPrice (ex. VAT)
AANFL3501M6/32.95 LB-FT48YZ.33B2.6 Amps.3360€714.53
AANFL3504M7.4/3.71 LB-IN48YZ.5B2.79 Amps.566€801.47
AANFL3507M8.2/4.15.7 LB-FT48YZ.75B2.7 Amps.7580€934.26
AANFL3510M11.8/5.97.19 LB-FT56YZ1F3.48 Amps178€1,153.19
AANFL3514M18/914.5 LB-FT56YZ1.5B6 Amps1.573€1,711.22
StyleModelAmpsFrameHPOutputPower FactorRevisionTypeVoltagePrice (ex. VAT)
AAFM35282.6/1.356Z.75.7573AG3413M230/460€517.10
AAFM35293.6/1.856Z1171AC3416M230/460€562.21
AAFM35304.9-4.6/2.3143TZ1.51.574E3424M208-230/460€649.29
AAFM35328.1-7.6/3.8145T3389Z3528M208-230/460€860.80
BALDOR MOTOR -

Aeration Fan Farm Duty Motors, Single Phase, Foot Mounted

StyleModelAmpsBreak-down TorqueFrameHPNo-load CurrentOutputPower FactorRevisionPrice (ex. VAT)
AAFL3520A11/5.5-56Z.75-.7568W€519.30
AAFL3521A12/6-561-181AB€611.77
BAFL3524A1514.7 LB-FT145TZ39 Amps3--€1,078.90
AAFL3522A16.6/8.35.6 LB-FT143TZ1.53.8 Amps1.582Z€847.31
AAFL3525A16.6/8.35.6 LB-FT561.53.8 Amps1.582-€791.18
AAFL3523A23/11.59.5 LB-FT143TZ26.5 Amps282AB€1,034.64
StyleModelAmpsBreak-down TorqueFrameFull Load AmpsMotor TypeOutputOverall LengthPower FactorPrice (ex. VAT)
AEGDM3218T14.0 A @ 208 V 13.2 A @ 230 V 6.6 A @ 460 V-184TZ6.6 A3640M5.000 hp17.5"80€1,374.02
AEGDM3311T20.4 A @ 208 V 19.4 A @ 230 V 9.7 A @ 460 V77.6 LB-FT213TZ9.7 A3734M7.500 hp17.32"79€2,013.98
AEGDM3313T26.0 A @ 208 V 25.0 A @ 230 V 12.5 A @ 460 V87.58 LB-FT215TZ12.5 A3742M10.000 hp18.45"82€2,386.45
AEGDM2513T38.0 A @ 208 V 36.0 A @ 230 V 18.0 A @ 460 V141 LB-FT254TZ18.0 A3948M15.000 hp24.19"85€3,303.24
AEGDM2515T52.0 A @ 208 V 48.0 A @ 230 V 24.0 A @ 460 V187 LB-FT254TZ24.0 A3948M20.000 hp24.19"85€3,823.46
AEGDM2531T64.0 A @ 208 V 60.0 A @ 230 V 30.0 A @ 460 V216 LB-FT284TZ30.0 A4050M25.000 hp26.06"82€4,727.03
AEGDM2535T76.0 A @ 208 V 72.0 A @ 230 V 36.0 A @ 460 V280 LB-FT284TZ36.0 A4060M30.000 hp27.06"82€5,288.46
StyleModelAmpsBreak-down TorqueHPInsulationNo-load CurrentOutputPower FactorRevisionPrice (ex. VAT)
ADEL3733TM2858 LB-FT7.5F10.8 Amps7.598AP€4,039.73
ADEL3737TM39111 LB-FT10H10.5 Amps1096G€4,934.47
StyleModelAmpsFrameHPNumber of PolesOutputPower FactorRevisionRPMPrice (ex. VAT)
ACHC3413A4.8/2.448Z.2504.2562W1700€519.30
ACHC3525A5.2/2.656Z.506.592B1100€810.95
ACHC3416A5.6/2.848Z.3304.3369Z1700€565.14
ACHC3417A5.6/2.848Z.3306.3367-1100€706.62
U S MOTORS -

Farm Duty AC Motors

StyleModelItemPrice (ex. VAT)
AFD1CM2P14Farm Duty Motor€818.57
BFD32CM2P14Farm Duty Motor€682.33
BFD34CM2PFarm Duty Motor€391.13
CFD12BA2PMotor€415.13
CFD12BA2P9Motor€482.20
DFD12CM2PCMotor€548.72
EFD1CM2PZMotor€475.11
LEESON -

Farm Duty AC Motors

StyleModelPrice (ex. VAT)
A056T17F15902€236.56
B5K49NN4052T€161.91
LEESON -

Farm Duty AC Motors

StyleModelPrice (ex. VAT)
A117883€599.41
B117888€444.02
C117884€630.50
D117889€524.79
E119783€907.28

Farm Duty Motors

Farm duty motors produce high starting torque and facilitate moderate starting current for conveyors, barn cleaners, compressors and manure pumps. These pre-lubricated units feature an epoxy finish for resistance against high temperature & moisture, offering smooth movement of the motor components. Raptor Supplies offers a wide range of these farm duty motors from brands like Baldor, Century, Dayton, Marathon Motors and Leeson. Baldor farm motors feature double-sealed bearings to reduce the frictional losses and prevent overheating. These farm duty motors are also integrated with a condensate drain valve to remove the excess moisture condensed by cooling of the motor, which may lead to corrosion of motor parts and bursting of the pump when the water freezes. Dayton farm duty motors are capable of delivering continuous-duty operations in applications like aeration fans, auger drives, grain stirrers, irrigation tower drives and crop driers. These agricultural motors feature steel frame construction for structural rigidity and withstanding heavy impact loads. They further come equipped with a totally enclosed non-ventilated enclosure with gasketed capacitor covers, junction boxes and shaft slinger for preventing the ingress of external contaminants and motor damage. Totally enclosed farm duty motors from these brands prevent the entrance of insects, rodents and other foreign materials.

Uses

These farm duty motors are suitable for low to high starting torque applications in the aggregate & cement, air handling, food & beverage, chemical, oil and gas industries.

Features

Dayton Farm Duty Motors

Baldor Super-E & 1 ph Farm Duty Motors

Century Motors

General Purpose Leeson Farm Duty Motors

  • Leeson general purpose farm duty motors are ideal for rugged use in commercial and industrial settings and are widely used in pumps, compressors, blowers and fans.
  • The brand's single and three-phase AC motors are explosion proof and designed for continuous duty applications in agriculture, woodworking and metallurgy industries.
  • They feature double sealed ball bearings for prolonged service life and a gasket capacitor case having a conduit box cover to prevent the entry of foreign contaminants.
  • These units are available in single and 3 phase motor designs for powerful performance.

Marathon Farm Duty Motors

  • Marathon farm duty motors are suitable for power generating applications in the automotive, food & beverage, marine and oil & gas industries.
  • These high torque motors are single-phase units having one / two speed operation.
  • They have totally enclosed fan cooled, totally enclosed air over or totally enclosed non ventilated enclosures to suit multiple applications.
  • Further, these units are supplied with thru bolts for quick and secure fastening.
  • These motors have a direct drive option (incorporating auger drive in selected models), providing maximum speed and positional & dynamic accuracy.

Working Mechanism

Farm duty AC motors work on the principle of magnetism as they contain two fixed magnets and a coil of wire surrounding a shaft. When an electric charge is applied to the coil of wire, it becomes an electromagnet, hence generating a magnetic field. The equipped stator includes a loop of wire, solid metal axle, coil, squirrel cage made of metal bars and some other freely rotating metal parts that are capable of conducting electricity. In an AC motor, sending power to the outer coils make up the stator & the coils energise in sequence & pairs, generating a magnetic field that rotates around the motor.

Standards and Approvals

  • Dayton motors are manufactured in compliance with ISO industry standard to deliver high quality product services.
  • Baldor motors are UL listed, NEMA rated and also comply with CSA & CE certifications.
  • Century farm duty motors are UL listed and adheres to CSA standards.
  • Leeson duty AC motors are UL and CSA recognised.
  • Marathon motors have NEMA ratings to guarantee a degree of protection of the equipment inside the enclosure against ingress of foreign objects.

Frequently Asked Questions

What general safety instructions should be followed while operating Baldor motors?

  • Avoid overtightening of belts as this may cause shaft breakage or premature bearing failure.
  • Allow clearance for end to end shaft movement.
  • Direct coupled machines should be precisely aligned and the shaft should rotate smoothly without any binding.

What are the factors to consider while purchasing a motor?

  • A current powers the motor, but excessive current can damage the motor as well. For DC motors, stall and operating current are important. Stall current applies sufficient torque for the motor to run either at stall speed or 0 RPM. This is the maximum amount of current the motor can draw. Overcurrent may lead to a rise in heat, resulting in wire melting.
  • Voltage is important as it keeps net current flowing in a single direction and overcomes back current. The higher the voltage, the higher the torque. Make sure that the recommended voltage is applied. If you apply very low voltage, the motor will not work, while applying too much voltage can lead to a short-circuit and consequently result in power loss or complete failure.
  • Operating torque is the amount of torque produced by the motor, while stall torque generates when you apply power from stall speed. The user must look at the required operating torque, but some applications require knowing how far to push the motor. For example, with a wheeled robot, good torque means good acceleration, but you should make sure the stall torque is high enough to lift the weight of the robot. In this case, torque is more important than speed.
  • Velocity or speed can be complex in regards to motors. Generally, a motor runs smoothly & efficiently at the highest speed, but it is not always possible if gearing is needed. Adding gears will reduce the motor efficiency, so reduce both the speed and torque simultaneously.