Speed Increasers

Boost Your Equipment’s Power with Cotta PTO Speed Increasers

Cotta PTO Speed Increaser Gearboxes are made in the USA and are the heaviest-duty you can buy. With over 100 years of gearbox manufacturing experience, Cotta is the go-to company for high-performance gearbox solutions. Our PTO Speed Increasers boost your equipment’s RPM for maximum efficiency and performance. Common applications include aviation component testing, drilling rigs, testing equipment for EV-related components, mining drills, and other high-performance industrial equipment. Built to be tough and reliable, our gearboxes will withstand even the toughest conditions. Whether diesel engines, electric motors or PTO’s Cotta’s speed increasers will make your equipment perform at its best.

Custom Solutions for Your Application

Our engineering team can create custom speed increasers for applications where off-the-shelf solutions won’t work. We work with you to understand your specific requirements, input running speeds, output speed, gear ratio, helical gears, and what type of equipment is being driven. Whether you need to increase RPM for hydraulic augers or EV component testing, Cotta’s precision-engineered gearbox components will deliver.

Cotta Speed Increaser Features

  • High Speed Applications – Cotta speed increasers are designed for high RPM performance making them perfect for drilling industries and aviation component testing.
  • Versatile – Compatible with hydraulic pumps and PTO’s, our speed increasers serve many industrial sectors, including mining and masthead drilling. They can also perform EV component testing.
  • Heavy Duty – Tapered roller bearings, our gearboxes are built to handle heavy loads and high RPM applications and will withstand the toughest environments.
  • Compatibility – Our gearboxes are designed to work seamlessly with hydraulic pump systems, facilitating hydraulic power generation for various equipment by linking the tractor’s PTO to the hydraulic pump.
  • Efficiency – The inclusion of speed reducers in our gearboxes decreases the rotational speed of a PTO shaft from 1000 rpm to 540 rpm, optimizing equipment usage and improving efficiency and performance in machinery.

Installation and Service

Cotta speed increasers require rear support and are driven clockwise when facing the input shaft. To ensure smooth operation, fill the level plug with gear oil before first use. Regular maintenance and proper lubrication are key to extending the life of your gearbox and its performance.

Precision Testing and Quality Control

All Cotta products are tested at our state-of-the-art facility in Beloit, WI. Our testing capabilities include high-speed RPM testing to ensure every gearbox meets our high standards before it leaves the plant. Our zero defect policy means every product is inspected and tested to give you consistent, high-quality results.

Why Cotta?

With 100 years of gearbox manufacturing experience and a history of innovation, Cotta is the go-to company for high-performance transmission solutions. Our products are built to last with a lifetime warranty and are the choice for industries that require precision, reliability, and custom solutions.

POPULAR SPEED INCREASERS VIEW SPEED INCREASERS CATALOG VIEW SPEED INCREASERS SPEC SHEETS INDUSTRIAL GEARBOX QUOTE REQUEST FORM

Popular Speed Increasers:

Some of our most popular speed increasers are shown below, and listed on this Tabulation Chart, but please contact Cotta for your specific needs.

AO2053A

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 650 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4500 RPM
  • RATIO RANGE: 1.4 to 2.0
  • OUTPUT SHAFT SIZE: 2.250” diameter, 5” long 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE HOUSINGS: #1, #2, #3, #4
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 14”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 400 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices.

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AO2053E

  • OUTPUT ROTATION: Same as input.
  • MAX INPUT TORQUE: 450 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4500 RPM
  • RATIO RANGE: 1.16 to 2.48
  • OUTPUT SHAFT SIZE: 2.250” diameter, 5” long 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #1, #2, #3, #4
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 14”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 425 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

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GO1700A

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 5500 lb-ft.
  • MAX INPUT SPEED: 2500 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 5500
  • RATIO RANGE: 1.5 to 3.0
  • OUTPUT SHAFT SIZE: 2.750” diameter X 6.0” long with 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock to input std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #00, #0, #1
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 24”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied.
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 1900 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

GO1700E

  • OUTPUT ROTATION: Same as input.
  • MAX INPUT TORQUE: 5500 lb-ft.
  • MAX INPUT SPEED: 2500 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 5400
  • RATIO RANGE: 1.21 to 2.95
  • OUTPUT SHAFT SIZE: 2.750” diameter X 6.0” long with 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock to input std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #00, #0, #1
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 24”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied.
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 2000 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

GO1900A

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 7900 lb-ft.
  • MAX INPUT SPEED: 2500 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4800 RPM
  • RATIO RANGE: 2.09 to 3.0
  • OUTPUT SHAFT SIZE: 3.25” diameter X 6.0” long with .75” X .375” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #00, #0
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 24”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 2100 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

GO1900E

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 7900 lb-ft.
  • MAX INPUT SPEED: 2500 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4800 RPM
  • RATIO RANGE: 1.76 to 3.54
  • OUTPUT SHAFT SIZE: 3.25” diameter X 6.0” long with .75” X .375” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #00, #0
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 24”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 2100 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

GO2329

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 10,000 lb-ft.
  • MAX INPUT SPEED: 1200 RPM or as otherwise approved by Cotta Engineering.
  • MAX OUTPUT SPEED: 4350 RPM
  • RATIO RANGE: 2.0 to 3.61. Others by special design.
  • OUTPUT SHAFT SIZE: 4.750” no-key typical.
  • OUTPUT SHAFT LOCATION: 12 O’clock std. 3, 6, and 9 o’clock optional.
  • SAE HOUSINGS: None. Independent mount.
  • SHAFT COUPLINGS: Commercial shaft couplings sized as required.
  • MOUNTING: Independent foot mounted unit.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished as required by application
  • *SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • **APPROXIMATE WEIGHT: 2100 lbs

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

SI2A

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 1450 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4500 RPM
  • RATIO RANGE: 1.2 to 2.67
  • OUTPUT SHAFT SIZE: 2.500” diameter with 5/8” X 5/16” keyway
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #0, #1, #2
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 18”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 750 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

SI2E

  • OUTPUT ROTATION: Same as input.
  • MAX INPUT TORQUE: 1300 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 4500 RPM
  • RATIO RANGE: 1.21 to 3.0
  • OUTPUT SHAFT SIZE: 2.500” diameter with 5/8” X 5/16” keyway
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #0, #1, #2
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 18”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 800 lbs

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

SI3A

  • OUTPUT ROTATION: Opposite to input.
  • MAX INPUT TORQUE: 2000 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 5500 RPM
  • RATIO RANGE: 1.27 to 2.44
  • OUTPUT SHAFT SIZE: 2.750” diameter with 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #0, #1
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 18”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 1000 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF

SI3E

  • OUTPUT ROTATION: Same as input.
  • MAX INPUT TORQUE: 1900 lb-ft.
  • MAX INPUT SPEED: 3000 RPM or as otherwise limited by input clutch or coupling.
  • MAX OUTPUT SPEED: 5500 RPM
  • RATIO RANGE: 1.2 to 2.52
  • OUTPUT SHAFT SIZE: 2.750” diameter with 5/8” X 5/16” keyway.
  • OUTPUT SHAFT LOCATION: 12 o’clock std. 3, 6, and 9 o’clock optional.
  • SAE FLANGE OPTIONS: #0, #1
  • *FLYWHEEL COUPLINGS: Various clutches, couplings, and drive plates through SAE 18”.
  • REAR SUPPORT: Required. Customer supplied item. Mounting holes provided per drawing.
  • LUBRICATION: Integral Lube pump supplied
  • COOLING: Oil/water shell-and-tube cooler furnished if required. Various options.
  • **SIDE LOAD CAPABLE: No. Contact Cotta for recommendations.
  • ***APPROXIMATE WEIGHT: 1150 lbs.

* Flywheel coupling selection requires Cotta technical review and approval.
** Cotta Speed Increaser output shafts are not designed for belt or chain side pull drives. If your application requires side loads provide complete application details to Cotta for recommendations and approval.
*** Weight listed is an average. Actual weight can vary significantly with options such as SAE housing size and flywheel coupling choices

DOWNLOAD PDF
Industrial Gearbox Quote Request Form

Cotta. Your gearbox of choice.

Precision-Engineered Speed Increasers to Meet Your Unique Requirements. Contact us today to learn more.

Maximize the efficiency of your industrial equipment with Cotta’s precision-engineered speed increasers. With a wide range of sizes and styles to choose from, our team of experts can help you find the perfect fit for your specific needs. Contact us today at 608.368.5600, sales@cotta.com, or click here to get started.

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Cotta Engineered Gearboxes are the most reliable and powerful products available in our industry. We take great pride in designing each unique gearbox with the latest technology. We deliver the best possible high-speed gearbox, speed increaser or reducer, pump drive, transfer case, or product type your situation requires.

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