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 offers the most dependable and versatile transfer cases available that convert your truck engine power for a wide range of onsite work capabilities. Cotta’s heavy-duty transfer cases are optimized for vocational truck, custom chassis, well drilling, oil field service, and specialty truck applications.  They provide up to 800 HP and 22,000 Lb-Ft of input torque, and offer modular concepts that help minimize your inventory and maximize application flexibility.

Cotta’s engineers have designed heavy-duty transfer cases for many decades, and can offer hundreds of proprietary designs to best match your power equipment requirements. An example of an application in which Cotta has been a go-to solution provider for transfer cases is in hi-rail trucks.  In these types of applications, the vehicles need to be able to go as fast forwards on a rail as they do backwards.  Since that is not possible with a regular truck transmission, Cotta’s forward reverse transfer case has been a great solution for companies in the hi-rail truck market.

See specifications below:

Ratio:  1:1 Forward & Reverse

Max Input Power:  450 HP

Max Input Torque:  1100 Ft-Lb

Forward Mode Yield Torque:  17000 Ft-Lb

Max Input Forward Speed:  3400 RPM

Max Input Reverse Speed:  2100 RPM

Approximate Weight:  720 Lb

Transfer Cases




Cotta Transmission’s complete product line supports a wide variety of industries and applications, where demanding performance is required under the most extreme working conditions and challenging environments.   Cotta designed and manufactured these right angle drives for a customer that uses the gearboxes in pavement grinders.  In this system, a drum hangs underneath the gearbox, and the two output shafts on the gearbox drives the grinding wheel.

See specifications below:

  • Ratio:  1.50 to 1
  • Max Input Speed:  2200 RPM
  • Design Power:  250 HP @ 2100 RPM
  • Approximate Weight:  687 Lbs

High-performance products. Collaborative team of experts. Solving problems and exceeding expectations. Contact Cotta at 608-368-5600 or email .

The Senior Buyer is a key member of the purchasing team and is responsible to, validate, communicate, and implement sourcing strategies for Cotta Transmission Company LLC. The Senior Buyer will be responsible for learning company purchasing policies and procedures, while maintaining inventory levels required for effective company operation, conducting regular price comparisons to ensure that the company is always getting the best TCO (Total Cost of Ownership) for each product purchased.

Essential Duties and Responsibilities:

  • Maintain strong working relationships with suppliers
  • Prepares and executes negotiations seeking TCO contracts and beneficial commercial agreements with suppliers
  • Issues bid requirements, selects suppliers, and places PO’s in accordance with company policies
  • Develops ideas and strategies to improve operational efficiency, add value, aid business performance, and work towards a strategy of continuous improvement
  • Monitor market trends, negotiate contracts, improve costs (and deliver agreed savings targets)
  • Review opportunities to achieve target savings utilizing negotiations and procurement best practice tools and methods
  • Develop new supplier sources
  • Reduce purchased material lead-time through active management of supply base.
  • Perform BOM pricing exercises for the sales department

Skills Required:

  • Bachelor’s Degree in Business or a related field required and a minimum of 5 years professional purchasing experience. Additional experience will be considered in lieu of degree.
  • Ability to apply common sense understanding to carry out instructions furnished in written, oral, or diagram form. Ability to solve problems involving several variables in standardized situations. Excellent communication and negotiation skills
  • Ability to calculate discounts and percentages
  • Must be able to calculate accurate cost savings for goods and services
  • Must have the ability to work in or lead cross-functional teams
  • Knowledge of MRP Systems, Internet software; Order processing systems; Microsoft Office software (Excel, PowerPoint, Access, Word)
  • Impeccable attention to detail
  • Able to thrive in a fast-paced environment
  • Travel – approximately 5% domestic and international as required

No VISA sponsorship nor Relocation Assistance available for this position.

In addition to being part of an amazing Cotta team, benefits include medical, dental and vision insurance, 401K, paid time off, health savings account, flexible spending account

Please send resumes, and any other employment inquiries, to

Some of the most challenging aspects of a business these days is not only finding good workers, but retaining them. Long-term employees reflect a stable work environment, and can improve morale within a company. A company that has employees who have been employed for many years have good knowledge of the company’s products, services, and culture.  Many have performed various job duties, which gives them a strong knowledge base, resulting in higher productivity with fewer mistakes.

Cotta Transmission has been in business over 100 years, and has been fortunate to have had multiple generations of families work for the company. One family that falls under this category is the Powers family.  This week Cal Powers celebrated his 45th year of employment at Cotta.   Cal’s father-in-law worked at Cotta for 38 years, and had encouraged Cal to join the team back in 1977.  Cal was first hired to run drills, and later learned other operations on the floor, including mills, grinders, and is currently lead stocker.  What makes this milestone even more special is that Cal works along side his son Chris Powers, who is now in his 24th year at Cotta.  Chris started at Cotta on a split shift when he was 18 years old.  Throughout the years Chris also learned other operations, including saws, assembly, supervising position, purchasing, and most recently shipping clerk.  The three family members have worked at Cotta for a combined total of 107 years.  Chris and Cal both reflected on their time working together, and both commented that the biggest benefit has been that they get to see each other every day.  Not only has time together benefited this father son duo, but the experience that they have gained over the years has also played a key role in Cotta’s success.

Learn more about opportunities to join an amazing team at Cotta: Employment




Cotta has some more transfer cases that are in the process of being painted and will soon be ready to ship. The transfer cases are used as creep drives in guardrail trucks, and gives the ability to creep at a very low consistent speed without being affected by the speed of the engine.  This allows the auxiliary systems to utilize the required power to effectively perform the work that is needed.  The vehicle is able to drive at normal speed once the system is disengaged.

Creep Drive Specifications:

Ratio:  3:1

Max Torque: 1250 ft lbs input PTO mode, 12500 ft lbs thru mode

Approximate Weight: 390 lbs

Oil Capacity: 12 quarts

Learn More: Cotta Transfer Cases


Gearboxes Ready to be Painted

Members of the Cotta team participated in First Aid, CPR, and AED (Automatic External Defibrillator) training yesterday.  Beloit Heath Systems provides a training program which is designated for first aid providers in the workplace.  The training includes a classroom, video-based, instructor-led course that teaches students critical skills needed to respond to and manage a first aid, choking or sudden cardiac arrest emergency in the first few minutes until emergency medical services arrives. The course also teaches adult CPR and AED, focusing on chest compressions and AED use, and follows the latest American Heart Association guidelines; AED training has been integrated into the CPR portion.

Minimizing risk to workers and decreasing workplace incidents is extremely important.  Providing a safe work environment for employees, and offering first aid training, can help increase awareness which could play a factor in helping to reduce the number of accidents and injuries. The training provided in the workplace is also an excellent team-building exercise for those involved.  The benefits are not only to the employees around those who received the training, but it can also prove to be beneficial outside the workplace to help save the life of a family member or friend.


Cotta manufactures a transfer case and top mast drive for a customer that uses the gearboxes in water well drill rigs.  The top mast is a small gearbox that goes into the mast of the drill rig, and is responsible for turning the pipe that drills the hole in the ground.  The transfer case is used to drive the truck and all its accessories.

Below is a picture top mast gearboxes in assembly:

Top Mast Gearbox in Assembly

Top Mast Gearbox Specifications:

Ratio:  2.50 to 1 Reduction

Max Input Speed:  600 RPM

Max Output Torque:  12000 Ft-Lb

Max Pull Out on Output Shaft:  30,000 Lbs

Approximate Weight:  600 lbs

Below is a picture of the transfer case prior to paint:

Transfer Case Before Paint

Transfer Case Specifications:


  • 1:1 Input to Output
  • 1:1.2 Input to Pump Pad

Max Speed:  3000 RPM

Max Cont Torque Thru Gears:  1900 FT-Lb

Max Cont Torque Top Shaft:  12,500 FT-LB

Yield Torque Top Shaft:  17000 Ft-LB

Max Power:  700 HP

Approximate Weight:  1160 LB



Gearbox efficiency is a measure of the power transmitted by a gearbox, or put another way, the power lost in a gearbox.  The difference between input and output power (loss) is due primarily to gear, bearing, and seal friction.  However, other factors contribute to losses, such as gear windage and the power to operate a lube pump if the gearbox is so equipped.

The magnitude of loss in a given gearbox depends on many factors, some of which are listed below:

  • Number of gears
  • Gear type (helical, worm, spur, etc.)
  • Gear quality level
  • Seal fits
  • Bearing type
  • Lubricant type and level
  • Speeds
  • Loads

Calculation of the exact losses is difficult and often turns out to be inaccurate. In fact, two apparently identical gearboxes may have slightly different efficiencies due to tolerances, fits, assembly practices, etc. For this reason, most gearbox manufacturers normally have a “rule of thumb” for estimating losses. The “rule” a given manufacturer establishes is usually based upon a combination of their engineering calculations, testing, and field experience.

Cotta’s rule of thumb for losses is 2% of the rated input HP  per loaded gear mesh – “worst case”. For example, an input/idler/output gear set would be estimated at 96% efficient. The reason for this is that there are two loaded meshes, the input-to-idler mesh, and the idler-to-output mesh.

Sample calculation is as follows:

Prime mover HP = 400

Loaded meshes = 2

Loss = 4% (2% * 2 meshes)

Loss = .04 x 400 – 16 HP

16 HP x 2542 = 40.672 Btu/hr

TRAP: Multiple speed gearboxes may have only one loaded mesh; however, there may be several unloaded meshes spinning – sometimes at high speed.  This will cause some heat even though no power is being transmitted. Multiple speed transmissions are a special case, and should be discussed with Cotta Engineering.

The losses in a gearbox must be accounted for both in prime mover size and heat rejection. That is, the prime mover must be “oversized” enough to make up the frictional losses. In our example, a maximum of 384 HP can be expected at the load. If 400  HP is required at the load, then the prime mover must deliver 416 HP to the gearbox (400 HP + 16 HP = 416 HP).

Losses in a gearbox manifest as heat and cause the lubricant temperature to rise. Depending upon the design, the gearbox case may dissipate this heat and keep temperatures at a reasonable level. However, as transmitted HP increases, external cooling becomes necessary. The HP losses calculated in our example represents the heat that must be rejected. Heat exchanges should be sized for those values. Cotta application engineers will recommend a heat exchanger if the application indicates over temperature is possible.

If you have questions regarding efficiency, contact Cotta at 608-368-5600, or email .

Cotta had a retirement celebration for Sales Manager, Paul Bachleda, this past week.   Paul had been employed by Cotta for a combined 17 years, with his most recent position having started back in 2017.  Paul first joined Cotta as an Application Engineer, and worked for 12 years prior to taking a position as an Account Manager in Oilfield Production for ZF.  Throughout Paul’s career he also worked for White Farm Equipment, JI Case, Koyo Bearings, and Fabco.  In addition to holding positions as Application Engineer and Account Manager at those companies, Paul also was involved with prototype assembly and engine dynamometers.  Paul’s extensive knowledge working with gearbox and other drivetrain components for industrial, farm, construction, oilfield, and off highway equipment has proven to be of great value to Cotta and their customers over the years.

We wish Paul the best in his retirement, and know he will be doing what he loves….farming and fixing cars.