+1 518 578 1775 info@eurogearinc.com


Refurbish any Gearbox

into a precision performance gearbox

Gear Boxes and Reducers

Refurbish any gearbox into a Precision Performance Gearbox.

We can take any gearbox and refurbish it into a precision machine that it was meant to be. Reverse engineering your old gearbox we can determine what your current needs are and design a better, smoother, longer lasting out performing any OEM’s gearbox. We will not supply you with off the shelf generic solutions. Each job is custom and your gearbox will humm like a fine precision machine. Unlike anything you have ever heard before. Experience:


  • Greater safety
  • Improved reliability
  • Higher performance
  • Greater efficiency
  • Easier maintenance
  • Reduced life-cycle costs
  • Reduced impact on environment
Custom Built Gearbox Housing

Housing inspections, crack and broken housing repairs are typical in our shop, when repairing a casting we advise that these are temporary solutions. Gearbox casings that are casted are usually apart of a production run and are mass produced. It is the cost effective method for off the shelf solutions.

However when our clients demand reliability for their gearboxes and commission us to build custom gearbox housings, they are getting a housing for life. Even in the harshest conditions a steel fabricated gearbox housing can be easily repaired. We can also create custom bases as well as integrate anti-vibration solutions into our mounting assemblies.

Gear Types and Benefits


  • Requiring a decrease in speed with high output torque
  • Cost effective
  • High gear ratios
  • High load-carrying capacity for enhanced performance
  • Noisy
  • Prone to wear
  • poorly cut teeth may result in excessive vibration and noise during operation.

Spur Gears

Spur gears have teeth aligned with the shaft axis. They are very common, very easy to make. These basic gears often provide superior efficiency, are the least expensive to manufacture and the most commonly used by OEM’s. Spur gears have straight teeth cut parallel to the rotational axis. The tooth form is based on the involute curve. This design accommodates mostly rolling, rather than sliding, contact of the tooth surfaces.


  • Smooth & Quiet Operation
  • High Horsepower
  • Efficient
  • Greater tooth strength due to the helical wrap around
  • Increased contact ratio due to axial tooth overlap
  • Higher load carrying capacity than comparable sized spur gears

Helical Gears

Helical gears differ from spur gears by having teeth angled with respect to the shaft axis. Since meshing teeth do not make full face contact all at once, these gears are smoother, less noisy, and can run faster. They also tend to have higher load capacities than comparable spur gears. Several teeth are in contact at any one time, producing a more gradual loading of the teeth that reduces wear substantially.


  • Smooth & Quiet Operation
  • High Horsepower
  • Efficient
  • Greater tooth strength due to the helical wrap around
  • Increased contact ratio due to axial tooth overlap
  • Higher load carrying capacity than comparable sized spur gears
  • Have a left and right hand element to cancel thrust or side loading on their bearings.
  • Efficient transfer of torque and smooth motion at high rotational velocities

Herringbone Gears

A herringbone gear, a specific type of double helical gear, is a special type of gear which is a side to side (not face to face) combination of two helical gears of opposite hands. From the top the helical grooves of this gear looks like letter V. Unlike helical gears they do not produce an additional axial load.

Gear Finishing, Coating and Treatments

Euro Gear goes the extra mile when it comes to gears…We grind all our gear teeth up to AGMA 12 standards which makes the meshing of gears as smooth as possible. After the grinding we heat treat the gear to harden the teeth and make them stronger which gives you dependability. In some cases the design demands coatings which can increase the life of the component 4 to 8 times that of an uncoated component.


Euro Gear Box Finishing Euro Gear Box Coating Euro Gear Box Treatments

Gearbox Manufacturing and Testing Procedures

Euro Gear Box Shafts

Gear shafts

Proprietary steels are used in our forgings to create a Euro Gear shaft. We use only forgings as the strength is stronger than a casting.


Euro Gear only uses the highest quality bearings

Bearings are critical in the running of your machinery. Euro Gear sets the bar high for the components that we manufacture, bearings are the only component that we do not manufacture. When it comes to bearings we demand only the best quality. All the bearings we purchase are put through a series of our own tests to ensure maximum performance. We use trusted sources for our bearings, don’t get stuck with fake bearings which is a growing problem worldwide. Please take a minute to read the text below of fake bearings…

Be Aware of fake bearings

What’s the problem with fake bearings? You’re not getting what you paid for. When you decide to buy name brand, premium products, you have high expectations for quality, durability and dependability. So, when you pay for premium and get average, or even downright faulty products, you get cheated. Make sure you’re getting your money’s worth. Trusted sources should be ones that you are confident can supply genuine products.

In addition, a faulty, counterfeit bearing may have legal consequences for you as a buyer and/or distributor. They may pose danger to operations, to finances and to human lives. Faulty and worn-out bearings can degrade and fail quickly. At best, this will only lead to equipment downtime and repair. In addition, when a counterfeit bearing fails, there may be financial and legal consequences for you, the buyer.

It’s often hard to tell the difference between a genuine bearing and a counterfeit one

Let’s face it: fake bearings won’t have “fake bearings” written on them. They won’t be scratched, rusty or dirty. They won’t necessarily even be cheaper. They look like, and are marketed like, genuine, premium brand products. Counterfeits can be new, low-quality bearings, which are labeled with false brand markings to justify a higher price. Even the packaging is skillfully imitated.

They may also be old, or even used, premium brand products, that are reconditioned and polished to look new. They are part of illegal and unethical practices. Counterfeiting is a crime in many countries, plain and simple. It puts lives and property at risk, due to the questionable quality of counterfeit products. We destroy all bearings that have been damaged on site to ensure that they are not put back on the market.

Testing and Meshing of Gears

We run all gearboxes in our testing center for a minimum of 8 hours, where it is closely monitored for performance. After the running phase we open up the gearbox and do an inspection on the equipment. At this stage of testing there is little to modify. This testing is to ensure that the gearbox is qualified to run on installation.

Euro Gear Box Finishing Euro Gear Box Coating Euro Gear Box Treatments


The following video demonstrates meshing of a gear box overhauled for a ball mill in a gold mine production plant:


Common Causes of Gear Failure
  • Wear from abrasion
  • Pitting from fatigue
  • Fracture from bending
  • Metal transfer from adhesion
  • Cracks from fatigue
  • Detrimental polishing from wear
  • Material movement from scuffing
Gearing Terminology
  • Addendum – the height of the gear tooth above the pitch circle diameter.
  • Backlash – the angle the output shaft of the gearbox can move without the input shaft moving.
  • Base Circle – an imaginary circle used in involute gearing to generate the involutes that form the tooth profiles.
  • Bevel Gears – used for right-angle applications. There are two types of bevel gears which are straight and spiral.
  • Bore – the diameter of the hole in a sprocket, gear, bushing, etc.
  • Center distance – distance between the axes of two meshed gears.
  • Circular Thickness – the thickness of the tooth on the pitch circle.
  • Dedendum – the depth of the tooth below the diameter of the pitch circle.
  • Diametrical Pitch – the teeth per inch of the diameter of the pitch circle.
  • Differential Gear – a bevel gear which allows two shafts to rotate at a different speed.
  • Gear – a wheel with teeth that meshes with another wheel with teeth to translate motion.
  • Gear Center – the center of the pitch circle.
  • Gear Ratio – the ratio between the numbers of teeth of meshing gears.
  • Gear Train – two or more gears meshed by their teeth. A gear train generates power speed through the meshed gears rotating.
  • Helical Gear – a gear with the gear teeth cut at angles.
  • Line of Contact – the line or curve along which two tooth surfaces are tangent to each other.
  • Involute – the curve which describes a line which is unwound from the circumference of the gear.
  • Pinion – a small cogwheel which fits into a larger gear or track.
  • Pitch Circle – the curve of intersection of a pitch surface of revolution and a plane of rotation.
  • Pitch Diameter – the diameter of the pitch circle.
  • Pitch Radius – the radius of the pitch circle.
  • Planetary Gears – a system that consists of three main components: the sun gear, ring gear, and two or more planet gears. The sun gear is the located in the center, the ring gear is the outermost gear, and the planet gears are the gears surrounding the sun gear inside the ring gear.
  • Pressure Angle – the angle between the line of action and the normal to the surface of the tooth.
  • Spiral Bevel Gears – shafts which are perpendicular to each other and are used in right-angle applications.
  • Spur Gear – connect parallel shafts which have involute teeth that are parallel to the shaft.
  • Sun gear – a gearwheel that rotates around its own axis and has other gears (planet gears) that rotate around it.
  • Torsional Stiffness – the measure of the amount of torque that a radial shaft can sustain during its rotation in a mechanical system.
  • Working Depth – the max depth a tooth of one gear extends into the tooth gear of mating gear.
  • Worm Gear – a gear with one or more teeth with screwed threads.