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800-341-4334 Email UsCotta Transmission High-Speed Transmissions
Available with operating speeds to 80,000 RPM, Cotta high speed transmissions are used extensively in Research and Development testing as well as production testing of aircraft components such as generators, CSD's, and pumps.
Available as both speed increasers and speed decreasers, Cotta high speed transmissions are also used in a full range of non-aviation applications ranging from magnetic levitation trains to centrifugal driers.
Although each model is highly specialized, the wide range of existing high speed designs is likely to provide a suitable transmission for most applications, or a candidate which can be easily modified.
So, whether a standard, modified standard, or a completely new design, Cotta high speed transmissions will meet your requirements.
HS0305 Specifications
CAPACITY: 300 HP @ 17,500 to 30,000 RPM constant torque below 17,500 RPM.
MAXIMUM OUTPUT SPEED: 30,000 RPM
RATIO: 1.0 to 2.0
OUTPUT PAD: AND20007 with the exception that there are 48 holes in place of 12 studs.
INPUT PAD: AND10267 type XVII with the exception that there are 48 holes in place of 12 holes.
DIRECTION OF ROTATION: Bi-rotational
ACCEL/DECEL RATE: 7500 RPM/Sec. Max.
PITCH RANGE: The gearbox will operate 112.5 degrees above the horizontal. There are 4 scavage ports for multiple pitch operation.
LUBRICATION: Uses MIL-C-23699. A separate lube system is supplied. Tank is 14.5 X 16.5 X 18.5” in size.
WEIGHT: 750 lbs. Including the lube system.
HS0305 Overview
Model HS0305 is a high speed right angle gearbox that is designed to fit to an existing test stand for attitude testing. The output pad can be rotated in 7 degree 30 minute increments about the input centerline. It has an overspeed ratio and a high accel/decel rate. The gears are spiral bevel and are precision ground. The output bearings are tilting pad journal type. The case is stress relieved fabricated steel.
SN1572 Specifications
CAPACITY: 400 HP
MAXIMUM OUTPUT SPEED: 30,000 RPM
OVERSPEED RATIOS: 1.267, 2.000, up to 1:2
INPUT PAD: Will fit AND 20006 XVI (A through D)
OUTPUT PAD (Includes adapters): AND20006, AND20002, AND20007 (Except for O-ring counterbore in spline shaft on AND20007).
LUBE REQUIREMENT: AGMA #1 or AGMA #2 lube. (Requires oil scavange line for labyrinth seals 2 GPM minimum)
DIRECTION OF ROTATION: Either direction, output is opposite to input.
WEIGHT: 150 lbs.
SN1572 Overview
Model SN1572 is an add-on type high speed transmission that allows output speed of existing gearboxes to be multiplied.
SN1624 Specifications
CAPACITY: 300 HP
MAXIMUM OUTPUT SPEED: 50,000 RPM
RATIOS: 5.143, 5.40, 5.957, 7.00 (Contact Cotta for other available ratios)
INPUT SHAFT: 1.500” diameter X 3” long with keyway.
OUTPUT: AND20006 Type XVI pad.
DIRECTION OF ROTATION: Bi-rotational—output opposite to input.
LUBRICATION: AGMA Grade 1. Separate lube tank assembly is required for output speeds over 30,000 RPM. Oil sump is case.
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/pressure switch.
OPTIONS: Stub output shaft, 1.250” diameter with keyway 60 tooth gear for customers speed pickup.
APPROX. WEIGHT: 615 lbs.
SN1624 Overview
Model SN1624 is a foot mounted high speed gearbox designed for test stand use. This model has a stub input shaft and an output pad. The gears are helical, carburized and precision ground. The bearings are anti-friction. The case is stress relieved fabricated steel.
SN1645 Specifications
POWER: 300 HP max power
OUTPUT SPEED: 20,000 RPM
RATIOS: 2.0 overspeed. (Contact us for others)
MAX ACCEL / DECEL RATE: 1000 rpm/sec at output
INPUT CONFIGURATION: AND 10267 compatible except with 48 mounting holes versus 12
OUTPUT CONFIGURATION: AND 20007 compatible except with 36 holes versus 12 holes.
ROTATION: Input can be driven cw or ccw. Output rotates opposite to input.
LUBRICATION: Separate lube system required and is supplied by Cotta.
OPTIONS: Accelerometers, speed pickup, and other application specific items can be accommodated or supplied
APPROXIMATE WEIGHT: 750 lbs approximate including lube components
STANDARD FINISH: 2 part polyurethane enamel
SN1645 Overview
Model SN1645 is a right-angle add-on high speed gearbox designed to permit attitude testing of constant speed drives and generators. This model can be installed on existing test stands. The output shaft can be positioned in 7-1/2 degree increments from 112 degrees above, to 135 degrees below the horizontal. This angular range is from 11 o’clock through 7:30 o’clock when looking at the output of the test stand.
SN1649 Specifications
CAPACITY: 200 HP (Input) nominal
MAXIMUM OUTPUT SPEED: 50,000 RPM
RATIOS: 2.00, 2.58, 3.00, 4.00, 5.44
INPUT SHAFT: 1.250” diameter x 3” long with keyway.
OUTPUT: AND20006 Type XVI pad.
OUTPUT ADAPTERS: 1—16 teeth 20/30P .800 P.D. 1—24 teeth 20/30P 1.20 P.D. 1—26 teeth 16/32P 1.625 P.D.
DIRECTION OF ROTATION: Bi-rotational—output opposite to input.
ACCEL/DECEL RATE: Max. 2000 RPM/second at output shaft
LUBRICATION: AGMA Grade 1. Oil sump is in case.
COOLING: Water to oil heat exchanger with modulatACCESSORIES: Temperature/pressure switch.
OPTIONS: Stub output shaft, 1.250” diameter with k.w. 60 tooth gear for customers speed pick up. AND20002 output pad.
WEIGHT: 615 lbs.
SN1649 Overview
Model SN1649 is a foot mounted high speed gearbox designed for test stand use. This model has a stub input shaft and an output pad. The gears are helical, carburized and precision ground. The bearings are anti-friction. The case is stress relieved fabricated steel.
SN1657 Specifications
CAPACITY: 450HP at 5000 RPM output
OVERLOAD CAPABILITY: 200% over entire range for short duration.
MAXIMUM RPM HIGH SPEED SHAFT: 15,000 RPM
RATIO, OVERSPEED: 5.208, 5.655, 5.909, 6.084, 6.416, 7.768, 7.82
INPUT SHAFT: 3.250” diameter with 3/4 x 3/8 keyway.
DIRECTION OF ROTATION: Either direction. Output rotation is the same as input rotation.
LUBRICATION: Pressure lubricated. Oil sump is in transmission case.
COOLING: Water to oil heat exchanger.
ACCESSORIES: Temperature/pressure switch. Switch activates when oil temperature exceeds safe limit or when pressure drops below minimum.
WEIGHT: Approx. 1100 lbs.
SN1657 Overview
Model SN1657 is a high speed coaxial transmission designed for test stand use for aircraft constant speed drives and generators. Output pads for the constant speed drives and generators are located on opposite sides of the transmission. Generators and CSD’s for the 747, L1011 and the DC10 can be tested. All generators can be tested without the CSD by use of lock up adapters.
SN1659 Specifications
CAPACITY: 800 HP
MAXIMUM OUTPUT SPEED: 30,000
OVERSPEED RATIOS: UP TO 1:3.14
INPUT PAD: Will fit AND20006 XVI (A thru D) .
OUTPUT PAD: (Includes adapters): AND20006, AND20002, AND20007 (Except for O ring counterbore in spline shaft on AND20007).
LUBE REQUIREMENT: AGMA #1 or AGMA #2 lube. Requires scavenge for labyrinth seals.
MOUNTING: 2 positions—output at either 6 or 9 o’clock positions in relation to input.
DIRECTION OF ROTATION: Either direction, output is opposite to input.
WEIGHT: 325 lbs.
SN1659 Overview
Model SN1659 is an add-on type high speed transmission that allows output speed of an existing gearbox to be multiplied.
SN1678 Specifications
MAXIMUM HORSEPOWER: 600HP
MAXIMUM OUTPUT SPEED: 35,000 RPM
RATIO: 1.0 TO 6.667
INPUT SHAFT: 2.875 diameter with a .75 wide X .375 deep keyway.
OUTPUT PAD: 1.375 diameter with a .312 wide X .156 deep keyway.
DIRECTION OF ROTATION: Bi-rotational.
LUBRICATION REQUIREMENT: AGMA #1
ACCESSORIES: 60 tooth speed pick up.
OPTIONS: Output pad, dual ratios.
SN1678 Overview
Model SN1678 is a foot mounted high speed gearbox that is designed for test stand use. This model has a stub input shaft and two output pads. Both output pads have the same direction of rotation and the same ratio. There is a single train of gears that are helical, carburized and precision ground per AGMA Q-12. The bearings are anti-friction. The case is stress relieved fabricated steel. A special design provides for different ratios on each pad.
SN1708 Specifications
CAPACITY: 250 HP, nominal
MAXIMUM OUTPUT SPEED: 60,000 RPM
RATIOS: 8.43, 8.94, 9.18, 15.225 (max.) (Contact Cotta for other available ratios)
OUTPUT: AND20006
INPUT SHAFT: 1.250” diameter with .250W X 3.125 deep keyway.
DIRECTION OF ROTATION: Output rotation is the same as input rotation.
MAXIMUM ACCEL/DECEL RATE: 2000 RPM/second at output shaft.
LUBRICATION REQUIREMENT: AGMA Grade 1, ISO viscosity grade 68. Separate lube system is required for output speeds over 40,000 RPM.
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/Pressure switch.
OPTIONS: Stub output shaft, AND20002 output pad, AND10262 output pad
WEIGHT: 1650 lbs.
SN1708 Overview
Model SN1708 is a foot mounted high speed transmission designed for test stand use. It has double increasing stages of gears that are helical, carburized and precision ground per AGMA class Q-12. The bearings are anti-friction. The case is stress relieved fabricated steel.
SN1903 Specifications
CAPACITY: 600HP
MAXIMUM OUTPUT SPEED: 30,000 RPM
RATIO: Up to 16.55
INPUT SHAFT: 3.250 diameter with 3/4 X 3/8 keyway.
OUTPUT: AND20006 output pad.
DIRECTION OF ROTATION: Bi-rotational
ACCEL/DECEL RATE: 2000 RPM/second maximum (Related to output speed).
LUBRICATION REQUIREMENT: AGMA #1 Oil level sight gauge. Reservoir is in the case.
COOLING: Water to oil heat exchanger with modulating water control valve.
OPTIONS: Output shaft, various AND pads, temp/pressure switch
WEIGHT: Approximately 1600 lbs.
SN1903 Overview
Model SN1939 is a foot mounted high speed dual increasing stage transmission designed for test stand use. The gearbox has a vertical offset. The gears are helical, carburized and precision ground. The bearings are anti-friction. The case is stress relieved, fabricated steel.
SN1995 Specifications
CAPACITY: 300HP at 650 to 2400 RPM input. 330 HP at same input for 10 minutes per hour. 450 HP at same input for 30 seconds per 1/2 hour
MAXIMUM OUTPUT SPEEDS: 15,600 RPM low speed pad. 35,300 RPM high speed pad.
RATIOS: HIGH SPEED: 14.685, 11.329, 12.790, 12.316, 15.965 LOW SPEED: 6.500, 5.664, 6.395, 6.156, 6.340
INPUT SHAFT: 3.250” diameter with 3/4 X 3/8 keyway.
DIRECTION OF ROTATION: Bi-rotational
CENTER DISTANCE: 20.67”
MAXIMUM ACCEL/DECEL RATE: 2000 RPM/second
LUBRICATION REQUIREMENT: Sump is in case. Pressure lubricated with spray on gears and bearings. Use AGMA #1 oil.
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/pressure switch. 60 tooth gear for each output for speed pick up.
FINISH: Two coats gray polyurethane enamel.
WEIGHT: 2550 lbs.
SN1995 Overview
Model SN1995 is a foot mounted high speed coaxial transmission designed for testing aircraft components. An output pad for a constant speed drive and for a generator are located on opposite sides of the transmission (co-axial). There are two output pads on the same side, a high speed and a low speed pad. A lock up adapter is furnished for testing generators without CSD’s.
SN2032 Specifications
CAPACITY: 100HP at 64,000 to 80,000 RPM output speeds. Output torque not to exceed 140 inch lbs.
MAXIMUM RPM HIGHSPEED
SHAFT: 87,000 RPM
RATIO: 1 TO 9.21 over-speed.
INPUT SHAFT: 1.250 diameter by 3” long with a .250 wide by .125 deep keyway.
DIRECTION OF ROTATION: Bi-rotational with output rotation in the same direction as input rotation.
MAXIMUM ACCEL/DECEL
RATE: 4500 RPM per second (output shaft).
LUBRICATION REQUIREMENT: AGMA #1 lube. Separate motor driven lube pump, filter and oil level gauge.
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/pressure switch.
OUTPUT PADS: 12 holes 3/8—16 on 10” B.C. concentric with output shaft.
OUTPUT SHAFT: .625 diameter with 3 flats.
WEIGHT: 1020 lbs.
SN2032 Overview
Model SN2032 is a high speed transmission designed for test stand use. It has a single input and output shaft with both on the same horizontal centerline. The gears are helical, carburized, and precision ground. The low speed and intermediate shafts have ball bearings. The high speed shaft has tilting pad journal bearings. The case is heavy fabricated steel that is stress relieved. The sump has two clean out covers.
SN2034 Specifications
CAPACITY: 300HP at 0 to 1900 RPM input High speed pad continuous rating 120 HP at 27,000 RPM output. Low speed pad continuous rating 300 HP at 13,000 RPM output. High speed input torque: 270 lbs/ft. maximum. Low speed input torque: 340 lbs/ft. maximum
MAXIMUM OUTPUT SPEED: 27,000 RPM at high speed shaft.
RATIOS: Pad #1 1.0 to 9.96 Pad #2 1/0 to 14.40
INPUT SHAFT: 3.250” diameter with .750 wide and .38 deep keyway.
DIRECTION OF ROTATION: Bi-rotational Pad #2 has the same direction as the input. Pad #1 has rotation opposite to input rotation.
MAXIMUM ACCEL/DECEL RATE: 2000 RPM per second at high speed shaft
LUBRICATION REQUIREMENT: AGMA #1 Separate motor driven lube pump is furnished.
COOLING: Heat exchanger with modulating water control valve.
ACCESSORIES: Oil level sight gauge, filter temperature/pressure switch.
OUTPUT PADS: AND20006
OPTIONS: Output shafts, various AS & AND pads.
SN2034 Overview
Model SN2034 is a foot mounted high speed transmission designed for test stand use. It has a single input shaft and two output pads with different ratios. The gears are helical, carburized and precision ground. The bearings are anti-friction.
SN2055 Specifications
CAPACITY: 600HP, nominal
MAXIMUM OUTPUT SPEED: 30,000 RPM
RATIOS: 1.29, 2.94, 3.18, 4.26, 6.10 (Contact Cotta for other available ratios)
INPUT SHAFT: 2.25“ diameter X 10” long with keyway.
OUTPUT: AND20006 Type XVI pad.
OUTPUT ADAPTERS: 1—16 teeth 20/30P .800P.D. 1—24 teeth 20/30P 1.20 P.D. 1—26 teeth 16/32P 1.625P.D.
DIRECTION OF ROTATION: Bi-rotational—output opposite to input.
ACCEL/DECEL RATE: 2000 RPM/second at output shaft.
LUBRICATION REQUIREMENT: AGMA Grade 1, ISO viscosity grade 46 Oil sump is in case
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/pressure switch.
OPTIONS: Stub output shaft, 60 tooth gear for customers speed pick-up AND20007 output pad.
WEIGHT: 825 lbs.
SN2055 Overview
Model SN2055 is a foot mounted single increase high speed gearbox designed for test stand use. This model has a stub input and an AND20006 output pad. The gears are helical, carburized and precision ground per AGMA Q– 12. The bearings are anti-friction. The case is stress relieved fabricated steel.
SN2057 Specifications
CAPACITY: 350HP, nominal
MAXIMUM OUTPUT SPEED: 50,000 RPM
MAXIMUM INPUT SPEED 6,000 RPM
RATIOS: 8.50, 11.96 (Contact Cotta for other available ratios)
INPUT SHAFT: 1.875 diameter with 1/2 X 1/4 keyway.
OUTPUT: 18 spline DIN STD 5480, 20.0 MM
CENTER DISTANCE: 14.131”
DIRECTION OF ROTATION: Bi-rotational—output rotation is the same as input rotation.
ACCEL/DECEL RATE: 2000 RPM/second referred to the output shaft.
LUBRICATION REQUIREMENT: Separate motor driven lube pump furnishing oil spray at gear meshes and bearings Filter and oil level gauge Use Velocite #10 oil Oil sump is in case.
COOLING: Water to oil heat exchanger with modulating water control valve.
ACCESSORIES: Temperature/pressure switch.
OPTIONS: AND type output pads stub shafts. Changeable output ratios.
WEIGHT: 1650 lbs.
SN2057 Overview
Model SN2057 is a foot mounted high speed transmission designed for test stand use. This model has a stub input shaft and output shaft. It has double increasing stages of helical, carburized and precision ground gears. The bearings are antifriction. The case is stress relieved fabricated steel.
SN2068 Specifications
CAPACITY: 600 HP
MAXIMUM OUTPUT SPEED: 35,000 RPM
RATIO: 1.0 to 6.667
INPUT SHAFT: 2.875 diameter stub shaft with a .75 wide X .375 deep keyway.
OUTPUT: 1.375 diameter with a .312 wide X .156 deep keyway.
LUBRICATION REQUIREMENT: Mil-L-23699, 50 GPM.
DIRECTION OF ROTATION: Bi-rotational
ACCESSORIES: 60 tooth speed pick up.
SN2068 Overview
Model SN2068 is a high speed 90 degree right angle drive designed for test stand use. It is vertical wall mounted with high speed output shaft vertical down. The input double train gear set is helical, carburized and precision ground. The output gears are ground spiral bevel. The low speed bearings are anti-friction. The high speed bearings are tilting pad journal type. The case is stress relieved, fabricated steel.
SN2071 Specifications
CAPACITY: 300HP
MAXIMUM OUTPUT SPEED: 25,000 RPM
RATIO: 1.0 to 13.135
INPUT SHAFT: 3.250 diameter with 3/4 X 3/8 keyway.
OUTPUT: AND20006 output pad.
DIRECTION OF ROTATION: Bi-rotational
ACCEL/DECEL RATE: 2000 RPM/second maximum (Related to output speed).
LUBRICATION REQUIREMENT: AGMA #1 oil level sight gauge. Sump is in the case.
COOLING: Water to oil heat exchanger with modulating water control valve.
OPTIONS: Output shaft, temp/pressure switch.
SN2071 Overview
Model SN2071 is a foot mounted high speed dual increasing stage transmission designed for test stand use. The gearbox has a horizontal offset. The gears are helical, carburized and precision ground. The bearings are anti-friction. The case is stress relieved, fabricated steel.
SN2102 Specifications
POWER:
OUTPUT SPEED:
RATIOS
MAX ACCEL / DECEL RATE:
INPUT CONFIGURATION:
OUTPUT CONFIGURATION:
ROTATION:
LUBRICATION:
OPTIONS:
APPROXIMATE WEIGHT:
STANDARD FINISH:
SN2102 Overview
Model SN2102 is a two stage increasing, single output, foot mounted high speed gearbox designed for test stand use.
SN2105 Specifications
Capacity: 200 HP nominal
Standard input speed: 4500 rpm. Higher by special design
Standard output speed: 12,000 rpm. Up to 20,000 rpm by special design
Center distance: 6.0 inches
Rotation: Output is anti input. Input rotation can be cw or ccw
Lubrication: Dry sump. Requires separate lube supply. AGMA#1 and several MIL-L options
Ratio: Up to 1:5.5
Gears: Precision ground helical
Input options: Keyed or splined shaft. Other custom configurations
Output options: Various shafts, AND and AS pads, customer specified.
Mounting: Integral mounting feet.
Size and weight: 19H x 18W x 15L. Approximately 150 lbs.
SN2105 Overview
SN2105 is a high speed transmission designed for test stand use. It is a single input, single output, parallel shaft design with a single increasing stage of gearing. The case is cast iron with integral mounting feet. The transmission is dry sump and requires an external oil source.
T-40 Specifications
Capacity: 40 GPM tank.
Motor: 3 HP, totally enclosed fan, 220/440/360V
Heat exchanger: Oil/water
Temperature control: Modulated control valve to control water flow
Temperature/pressure switch: Temperature and pressure sensing switch to interface with customer controls.
Level indicator: Glass sight gage
Filter: 10 Micron bypass type
T-40 Overview
The T-40 lube system is a separate pressure lubrication system supplying filtered oil to a transmission. It is supplied with safeguards to protect the transmission from low oil pressure or high temperature
T17-7 Specifications
TANK: 14 gallon capacity foot mounted—12” X 14” X 22” with baffles and removable end for cleaning purposes.
MOTOR: 60 cycle, 230/460 volt. 1 HP with 1725 RPM 50 cycle, 190/380 volt 3/4 HP with 1425 RPM
CIRCULATION PUMP: 10 GPM
SCAVANGE PUMP: 5 GPM
HEAT EXCHANGER: Oil to water tube type, 2 pass.
OIL FILTER: 10 micron with by-pass and filter condition gauge.
TEMPERATURE PRESSURE SWITCH: High temperature and low pressure switches.
TEMPERATURE ACTUATED MODULATING WATER CONTROL VALVE: Lube temperature probe in sump tank with lead to water control valve to control flow of water through heat exchanger.
OIL LEVEL GAUGE: Glass tube type
INLET PORTS: (8) 1-1/4” pipe tap holes provided for ease of plumbing.
DRAIN PLUGS: Magnetic
OIL FILLER: Screened—strainer type.
PRESSURE GAUGE: 0 to 60 PSI.
PRESSURE RELIEF VALVE: 20 to 25 PSI
WEIGHT: 385 lbs.
T17-7 Overview
The T17-7 High Speed system is a remote pressure lubrication system for supplying filtered oil to a transmission. It is furnished with an oil scavange section for labyrinth type seals. This is a completely assembled system, having safeguards to protect the transmission from pressure failure or temperature fluctuations.
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