Tag Archive for: High-Speed Gearbox

Cotta recently repaired this High-Speed Gearbox Model SN1939-1 which has been in use for almost 14 years by a leading aerospace manufacturer of jet engines and related components. Our SN1939-1 gearbox is used to test production parts, such as engine-related components, at their manufacturing facility. During routine preventative maintenance, our customer noticed the gearbox had about a “tablespoon of metal debris” that collected on a magnet at the bottom of the gearbox. From our inspection here at Cotta, we found one bearing wasn’t spinning freely on the high-speed shaft – which we discovered also had a small chip in the shaft. Our Genuine Cotta Repair Service begins with a thorough inspection, cleaning and complete evaluation and then, after our diagnosis, only Genuine Cotta Parts are used as replacements during our reassembly process.

Model Series SN1939 High-Speed Gearbox Specifications:

  • Nominal Power of 600 hp
  • Max Output Speed of 30,000 rpm
  • Ratio Range up to 14.40 overspeed
  • Max Accel / Decel Rate of 2,000 rpm/sec at output
  • Approximate Weight of 1,600 lbs.

Model SN1939 is a foot-mounted, two-stage increasing, two output, high-speed gearbox that is designed for test stand use. This model has a stub input shaft and two aerospace output pads typically AND20006. Both output pads have the same direction of rotation and the same ratio. There is a special design option to have a different ratio on each output. Contact Cotta engineering for information on per head power capability. For more information about Cotta SN1939 and other high-speed gearboxes in our line, visit our High-Speed Gearboxes Page.

       

Cotta’s high-speed gearboxes are built to provide many years of service, which is a reason why some of the largest OEM companies in the world have come to Cotta for custom built gearbox solutions.  In addition to designing high-speed gearboxes for speed management in non-aviation and industrial applications, where highly-specialized, powerful and reliable solutions are needed, Cotta has also designed numerous gearboxes for R&D and production test stand applications for automotive, aerospace, and industrial components.

Cotta’s engineering team designed this high-speed gearbox that will be used in a test stand for an aerospace application.  After the assembly process is completed, additional quality checks will be made on the gearbox as it goes through testing in Cotta’s high-speed programmable test cell.  See gearbox specifications below:

Ratios:  

  • 1 to 8.436 overspeed low speed pad (20,000 RPM Max)
  • 1 to 12.79 Overspeed high speed pad (30,000 RPM Max)

Max Accel/Decel Low Speed Pad:   2933 RPM/SEC

Max Accel/Decel High Speed Pad:  4400 RPM/SEC

Total Inertia:  132.876 LB-IN-SEC ^2 Referred to Input Shaft

Approximate Weight:  2100 LB

 

 

Cotta specializes in high-speed gearboxes for testing rotating components, with aerospace being one of the key markets. Built to provide many years of service, Cotta high-speed gearboxes are offered in a variety of standard and customized designs. Cotta has the ability to start with a “clean-sheet design”, which allows us to show you our versatility and experience to engineer a customized gearbox solution that fits your personal requirements and needs.

Cotta SN3396 High-Speed Gearbox

Cotta Model: SN2285

Output Speeds: Up to 90,000 RPM

Power Capacity:  300 HP

Weight; 270 lbs.

Market: Aerospace

Click the link below to view some of Cotta’s high-speed gearbox models:

High-Speed Gearbox Models

 

 

Cotta has an extensive background in working with research facilities at universities worldwide, supplying high speed gearboxes for test stand applications.  Some of those facilities are involved with research and product development for OEM’s in the aerospace propulsion and power industries.

For over 50 years, Cotta has designed and manufactured a diverse line of high speed gearboxes that are used by some of the largest OEM companies in the world.  The gearboxes are developed for numerous R&D and production test stand applications for automotive, aerospace and industrial components. Cotta’s high speed gearboxes are also applicable for speed management in non-aviation, industrial applications – from turbine reduction gears to centrifugal driers, to numerous other instances where a highly specialized, powerful and reliable solution is needed.

On a recent project for a university, Cotta’s engineering team designed and manufactured a high-speed gearbox for a test stand.  See specifications below:

RATIO:  1 TO 13.02

MAX TORQUE:  700 FT-LB HIGH SPEED SHAFT

MAX SPEED:  23,000 RPM HIGH SPEED SHAFT

APPROX WEIGHT:  3000 LBS

Cotta has designed and manufactured a diverse line of high-speed gearboxes that are used by some of the largest OEM companies in the world for numerous R&D and production test stand applications for automotive, aerospace, and industrial applications.  This gearbox is high-speed and was designed for a customer’s R&D test stand application.  The gearbox will be going through extensive testing prior to being sent out to the customer. In addition to systematically and comprehensively monitoring the quality of all internal processes, first-piece inspection is conducted on every machining sequence, and every transmission is tested prior to shipment.

Gearbox Specifications Below:

  • Ratio: 1 to 13.02
  • Max Torque:  700 Ft-Lb High-Speed Shaft
  • Max Speed:  23,000 RPM High-Speed Shaft
  • Approximate Weight:  3000 Lb

Learn More:  Cotta High-Speed Gearboxes

Learn More:  State-of-the-Art Testing Facility

 

Cotta Transmission has a niche in the high-speed gearbox market, offering custom solutions when off-the-shelf products just aren’t a fit.  Companies continue to turn to Cotta’s engineering department for unique prototype solutions, many of which are being used in test stands to help validate the customer’s developing technology.

Cotta manufactured this speed reducer that is being used in an aerospace test stand application.  See specifications below:

  • Ratio:  1.719 : 1
  • Maximum Shaft Speed:  29,000 RPM
  • Maximum High Speed Shaft Power:  445 HP
  • Maximum Accel/Decel Rate:  2000 RPM/s on High Speed Shaft
  • Approximate Weight:  270 LBS
  • Total Inertia:  .06868 LB-IN – S^2
  • Referred to High Speed Shaft

Cotta provides you with the optimum gearbox design for your application.  Provide us with as much information as you have available by clicking here.

The speed of development of electric vehicle drivetrains and components has brought new testing challenges to the test equipment market.  One of those challenges includes finding new, high-speed test equipment for component and drivetrain testing.  Cotta has supplied some of the world’s leading electric vehicle & drivetrain manufacturers with high performance gearboxes.  Cotta gearboxes are designed for years of high-cycle testing up to 90,000+ RPM.  With many more hybrid and electric vehicles coming to the automobile market, a significant portion of energy consumption will be electricity use. A number of Cotta customers have a long history of testing these types of vehicles to understand the energy flows and the impact that certain aspects, such as regenerative braking and HVAC, have on the electrical energy consumed both from the vehicle battery and the electricity grid. Testing helps improve the energy efficiency of vehicles to reduce the vehicle’s operating costs, and meet regulatory requirements of a low-carbon economy.

Several Cotta customers offer test system solutions for measuring electric vehicle energy efficiency. Below are some typical electrification applications where our broad line of high-speed gearboxes are used:

  • High-Speed Electric Motor Test Systems
  • Electric Axle Driveline Test Systems
  • Electric Accessory Testing

Since the 1960’s, Cotta has been designing and manufacturing a diverse line of high-speed customized gearboxes to meet the specified needs of customers.  Cotta’s high-speed gearboxes are used by major automotive and component manufacturers for both R&D, and production test stands.  Cotta gearboxes are designed and built to last, with some of the early units still operating in the field today.   One example, is a customer that uses a Cotta gearbox in one of their in-house stands. The gearbox has  operated for over 25 years without a major breakdown.  The customer has specific requirements for stringent applications, and over the years Cotta has always been quick to respond to meet the customer’s needs.

LEARN MORE: Cotta’s High-Speed Gearboxes

For over 50 years, Cotta has designed and manufactured a diverse line of high-speed gearboxes that are used by some of the largest OEM companies in the world for numerous R&D and production test stand applications for automotive, aerospace and industrial components. Our high-speed gearboxes are also applicable for speed management in non-aviation, industrial applications – from turbine reduction gears to centrifugal driers, to numerous other instances where a highly specialized, powerful and reliable solution is needed.

Cotta has the ability to start with a “clean-sheet design”, which allows us to show you our versatility and experience to engineer a customized gearbox solution that fits your personal requirements and needs.  Whether it’s a standard build or a custom configuration, Cotta will find the right recommendation for you.

Learn more:  High-Speed Gearbox Catalog

Cotta Transmission completed the assembly on this high-speed gearbox for a systems integrator specializing in dynamometers and test stands. The customer reached out to Cotta and needed a gearbox to reduce turbine speeds into their dynamometer speed range. This is the second unit at this installation and the requirement was to create a duplicate envelope gearbox with the new specifications. Cotta’s engineering team was able to fit the new ratio in the existing center distances while still providing all design requirements.

The high-speed gearbox will be used in a in R&D test stand application, with the dynamometer providing the load on the unit. The end user of the gearbox is one of the top science and technology research universities in the world.

SPECIFICATIONS:

Ratio:  1 to 15.68

Max Output Speed:  62,000 RPM

Max Power:  315 kW (420 HP)

Max Output Torque:  75 Nm (55 Ft-Lb) @ 40,000 RPM

Approximate Weight: 430 kg (950 LB)

Estimated Efficiency:  1270 BTU/Min

 

LEARN MORE: HIGH SPEED GEARBOXES

 

Cotta’s Model SN1649 is a foot mounted single increasing stage, high-speed gearbox designed for test stand use.  The gearbox is compact, making it suitable for enclosure into utilized test stands. The model has a stub input shaft and typically has an aerospace accessory drive pad output.  The gearbox can be modified for operation up to 50,000 rpm output speed.

SPECIFICATIONS:

Power:  300 HP

Output Speed:

  • 30,000 RPM Typical
  • 50,000 RPM with modifications

Ratios:  2.00, 2.58, 3.00, 4.00, 5.44. Contact Cotta for other available ratios

Max Accell/Decel Rate:  200 rpm/sec at output. For high rates contact Cotta

Input Configuration:  Keyed stub shaft is standard. Contact Cotta for optional inputs

Output Configuration:  AND20002 pad is typical. Shafts and various other pads available

Rotation:  Input can be driven ccw or cw.  Output rotates opposite to input

Lubrication:  Positive delivery.  Pump, heat exchanger, and necessary temp and pressure controls are furnished

Options:  Accelerometers, speed pickup, and other application specific items can be accommodated or supplied

Approximate Weight:  200 lbs

Standard Finish:  2-part polyurethane enamel

Over 50 years, Cotta has designed and manufactured a diverse line of high-speed gearboxes that are used by some of the largest OEM companies in the world for numerous R&D and production test stand applications for automotive, aerospace and industrial components.  Contact Cotta for for your high-speed gearbox needs.

 

LEARN MORE: HIGH SPEED GEARBOX CATALOG