High Performance Gearbox
Engineered with precision and powered by innovation, Porite Group’s high performance gearboxes are manufactured with the highest quality powder metallurgy and metal injection molding components. By delivering exceptional strength, consistency, and performance, Porite delivers a gearbox that is ready to shift your design into high gear.
Compact
Porite’s compact gearboxes achieve the same torque as competitors’ larger gearboxes.
Unlimited Applications
Porite’s gearboxes are used in a variety of applications ranging from power tools to wheelchairs and everything in between.
In-House Technology
By utilizing our in-house technology including a noise reduction gear, oil-impregnated bearings and a newly developed grease, Porite has achieved a technologically superior gearbox.
Gearbox Initiative
For over 70 years Porite has developed a deep level of institutional knowledge related to our core pillars: machine parts, bearings and metal injection molding components. Now, we are using that long history of developing experience and know-how in our core technologies to improve fully assembled product units. By utilizing our in-house manufacturing capabilities, Porite is able design, engineer and build a top of the line gearbox that takes advantage of the best features of powder metallurgy and metal injection molding.
When setting out to design a top of the line gearbox, Porite had three goals in mind:
- Create a compact gearbox without sacrificing torque.
- Consume less energy than competing gearboxes that generate similar torque.
- Keep noise levels to a minimum.
1. Compact
A compact gearbox has a few inherent advantages. First, space. The compact gearbox takes up less space, meaning more room for something else or, simply, a smaller finished product. Second, weight. A compact gearbox reduces the total weight of the finished product resulting in more efficiency and lower power requirements.
Here is an example of Porite’s miniaturization capabilities. When a maximum allowable torque of 1.5 Nm is needed, a gearbox with an outside diameter of 32 mm was required. With Porite’s new design, a gearbox with an outside diameter of 16 mm can achieve the same maximum allowable torque.
One of the challenges of creating a more compact gearbox is ensuring durability. To prevent shaft wear and seizure, Porite utilizes the advantages provided by its original thin-walled, oil-impregnated bearing. These bearings are press-fit into the planetary gears to improve sliding performance with the carrier shaft.
2. Low Energy Consumption
One of the biggest barriers to power efficiency in a gearbox is friction between the planetary gear and the carrier shaft. Porite’s solution to this is the same durability solution discussed above – oil-impregnated bearings are press-fit into the planetary gears. Our newly developed grease, a collaborative effort between Porite and our grease supplier, is used in these bearings. This method is proven to reduce friction, thereby reducing power consumption. The results of Porite’s in-house testing is depicted in the graph below.
3. Low Noise
To achieve low noise in the gearbox, Porite focused on the first-stage planetary gear. This gear generates noise due to its high-speed (resulting in high-frequency) rotations. To counteract the natural noise generated at this stage, Porite introduced a Noise Reduction Gear (NRG) for this first-stage gear.
The effectiveness of the Noise Reduction Gear is due to its unique powder metal material. Utilizing a blend of iron, copper and tin, Porite manufactures a NRG that functions with minimal noise. The iron and copper materials offer high mold transfer-ability, enabling high-precision. The addition of tin strengthens the bonding force of the powder. Copper makes up the outer layer of the powder which improves sliding performance due to its high porosity and high surface pressure.
Reduction in noise levels was confirmed by in-house testing, the results of which are reflected in the graph below.
Contact us today to bring your gearbox to life.
