K-Series Helical Bevel Gearbox is a specialized mechanical device used to reduce the rotational speed of an electric motor and increase torque. When this gearbox is combined with an electric motor, it forms a gear motor, specifically heavy-duty gear motors capable of powerful and efficient transmission. With a right-angle shaft structure, the device helps flexibly change the transmission direction, suitable for applications in heavy industrial environments and systems requiring optimal installation space.
Other names:
Right-angle gearbox
Right-angle bevel gearbox
Right-angle gear reducer
Distinction from inline helical gearbox: The main difference is the ability to change the direction of force transmission, making the right-angle gearbox suitable for narrow spaces or applications requiring motor redirection.
Popularity: Right-angle gearboxes are widely used in many industries, especially in conveyor systems, agitators, hoisting machines, and other automation equipment.
What is K-Series Helical Bevel Gearbox?
Structure of the Right-Angle Gearbox
The structure of the right-angle gearbox includes the following main components:
Housing: Usually made of solid cast iron or aluminum alloy, ensuring rigidity and protection for internal components.
Input and output shafts: Positioned perpendicular to each other and connected via a bevel gear or worm gear mechanism, depending on transmission ratio and efficiency requirements.
Gears: Usually hardened and heat-treated to increase durability and load capacity.
Bearing and oil seal system: Ensures lubrication and protects internal moving parts within the gearbox.
Motor mounting hole: Can be flanged or keyed input shaft, depending on the type of motor used.
Operating Principle of the Right-Angle Gearbox
The operating principle of the right-angle gear reducer is quite simple:
Motor shaft transmits power into the gearbox → Power is transmitted through bevel gears (or worm gears) → Output shaft rotates in a perpendicular direction → Speed is reduced, torque is increased.
A standout feature of this gearbox is its ability to transmit power stably and efficiently change the direction of force transmission. When combined with 3-phase electric motor products, the K-Series Helical Bevel Gear Reducer forms a heavy-duty gear motor, meeting the demands of various industrial applications.
Operating principle of the K-Series Helical Bevel Gearbox
Classification of the K-Series Helical Bevel Gearbox
1-Stage K-Series Helical Bevel Gearbox
The 1-stage K-Series Helical Bevel Gearbox is a type of gearbox featuring a pair of spiral bevel gears and helical gears. This type is typically used in applications where the transmission ratio does not need to be excessively large. The advantages of the 1-stage gearbox are its compact size, high efficiency, and reasonable cost. It is commonly applied in machinery with moderate loads and output speed requirements that are not too slow.
2-Stage K-Series Helical Bevel Gearbox
The 2-stage K-Series Helical Bevel Gearbox features two pairs of gears, enabling a larger transmission ratio compared to the 1-stage type. This type is generally used in applications requiring very slow output speeds and high tractive force. The advantages of the 2-stage gearbox are high speed reduction capabilities and large torque. It is applied in heavy machinery, heavy-duty lifting systems, and applications requiring high precision.
Classification of K-Series Helical Bevel Gearboxes
K-Series Helical Bevel Gearbox Prices at Thanh Thai Motor
Below is the price list for gearboxes, specifically the pricing for popular K-Series Helical Bevel Gearbox models at Thanh Thai Motor. Customers can refer to this to choose the product that suits their needs.
Things to Note When Buying a K-Series Helical Bevel Gearbox
Calculate torque force instead of just looking at power: For heavy-duty K-series applications, motor power is only a necessary condition.
Determine the output shaft type: The K series is extremely flexible regarding output shaft styles; you need to choose precisely according to the machine structure:
Hollow shaft: Inserting the machine shaft directly into the gearbox saves space and reduces misalignment.
Hollow shaft with shrink disc: A premium keyless hollow shaft type fixed by a shrink disc clamping tightly onto the machine shaft, specialized for extremely heavy-duty applications to avoid keyway stripping and shaft breakage.
Choose the correct shaft orientation and mounting style: The K series has variant codes such as K (foot-mounted), KA (hollow shaft), KF (solid shaft flange-mounted), KAF (hollow shaft flange-mounted). Due to the right-angle output shaft, you must clearly determine whether the output shaft is on the left or right of your viewing direction, and whether the installation orientation is horizontal (M1) or vertical (M4). Choosing the wrong installation orientation will misalign the breather plug and lubricating oil level, leading to oil shortage and burning out top bearings.
Choose anti-rotation accessories: If you choose the K-series hollow shaft (KA/KAF) mounted directly suspended on the machine shaft, you are required to purchase an additional torque arm accessory.
Request inspection of machine noise and backlash: K-series heavy-duty gearboxes have very low mechanical backlash. During trial runs, the machine must operate smoothly, with only the gentle hum of lubricant and high-speed meshing helical gears. There must absolutely be no grinding or clacking sounds from the bevel gear stage.
To get a broader overview of the R-Series Inline Helical Gearbox, customers can visit the comprehensive video page, the gearbox video category to learn more information, installation notes, and monthly price quotes.
Things to note when buying a K-Series Helical Bevel Gearbox
Frequently Asked Questions
Why is adjusting the meshing clearance of the spiral bevel gear pair in the K-series gearbox much more complicated than in the R-series inline helical gears?
In the R-series inline gearboxes, the gear shafts are parallel to each other, so the center distance is fixed, and meshing occurs naturally. Specifically for the K series, the spiral bevel gear pair changing the transmission direction by 90º requires the apexes of both gears to coincide at a geometric center point. During assembly or overhaul, technicians must use ultra-thin shims to simultaneously adjust both the axial backlash and the tooth meshing position. If aligned by just a few tenths of a millimeter, the bevel gear will jam at the tips, causing extreme howling and chipping the teeth immediately upon load application.
How does parasitic axial force generated from the spiral bevel gear pair destroy the bearings of the K-series gearbox if chosen incorrectly?
During right-angle transmission, the spiral bevel tooth surfaces generate a very large axial thrust force, attempting to push the two gears apart in a perpendicular direction. To eliminate this force, the K-series gearbox must use a pair of symmetrically mounted tapered roller bearings to block the axial thrust force, instead of regular deep groove ball bearings. If the manufacturing unit is poorly machined or uses cheap ball bearings, this parasitic axial force will shatter the bearing cages, cause shaft play, and ruin the entire internal bevel gear stage.
Why is the K-series hollow shaft with a shrink disc the optimal solution for heavy loads and strong vibrations compared to standard keyed hollow shafts?
For extremely heavy-duty applications with continuous shocks, if using a standard keyed hollow shaft, the twisting and shock forces concentrate entirely on a small point on the key. Over time, the keyway will wear out, causing backlash and even deformation that jams the gearbox so it cannot be removed from the machine shaft. The shrink disc K series uses an external friction clamping mechanism around the hollow ring: When tightening the shrink disc bolts, the gearbox bore clamps evenly 360º around the machine shaft. This mechanism completely eliminates backlash, handles shock loads perfectly, and makes installation and removal extremely easy during maintenance.
