Zero Bevel Gear In Wheel Loaders

This zero bevel gear is a pair of spiral bevel gears used for wheel loaders.

Core Application Scenarios

Automotive Industry: Mainly used in the final drive/differential of vehicle drive axles, transmitting power from the driveshaft to the left and right wheels at a 90-degree angle.
Construction Machinery: Used as core transmission components in heavy equipment such as loaders, excavators, and bulldozers, designed to withstand high torque and heavy-load power transmission.
Industry and Aviation: Widely applied in gearboxes, reducers of various mechanical equipment, as well as helicopter transmission systems.

Key Product Features

Smooth and Quiet Transmission: The teeth have a spirally curved arc shape. Meshing is progressive contact rather than the instantaneous impact of straight teeth, significantly reducing operating noise and vibration.
High Load Capacity: The spiral tooth surface provides a larger effective contact area and higher contact ratio, allowing for even load distribution, suitable for heavy loads and impact conditions.
Efficient Power Transfer: Compared to straight bevel gears, friction loss is smaller, power transmission efficiency is higher, and heat generation is lower.
Compact Space Layout: Designed specifically for intersecting shafts (typically 90 degrees), it effectively saves internal space in mechanical equipment while changing the direction of power transmission.

Specification

Module

Application

Wheel Loaders

Material

20CrMnTi

Heat Treatment

Carburizing HRC 58-62

Accuracy

ISO 17485

Application of Zero Bevel Gear in Wheel Loaders

1. Differential Internal Planetary / Side Gears (Indirectly Related)

Strictly speaking, the internal planetary gears and side gears in a differential are straight bevel gears or Zerol-type bevel gears. Some older or light-duty loaders opt to replace straight bevel gears with Zerol Bevel Gears in the differential. The advantage is maintaining zero axial thrust while reducing differential operating noise.

2. Work Pump PTO Right-Angle Gearbox

Loaders often draw power from the transmission or engine to drive the work hydraulic pump, fan cooler, or air compressor. In such small right-angle PTO gearboxes (90° transmission), when the following requirements apply:

Bidirectional reversible rotation (can transmit power in both forward and reverse)
Minimized axial thrust → simplified bearing housing design
Quieter and smoother operation than straight bevel gears

A Zero Bevel Gear (Zerol) pair is adopted as an economical alternative to Spiral Bevel Gears.

3. Steering System Auxiliary Angle Drive / Centralized Lubrication System Drive

In some older loaders, the steering assist pump drive or centralized lubrication system’s angle drive mechanism uses Zerol Bevel Gears under moderate speed and moderate load conditions. This allows direct replacement of existing straight bevel gear housings without modifying the bearings.

4. Small/Mini Loader Drive Axle Final Drive (Rare)

In very few mini skid-steer loaders or low-horsepower models (<30 HP), the drive axle final drive may use Zerol Bevel Gears as an upgrade over straight bevel gears. However, large-tonnage loaders

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Production process

6-Step Production Process

Forging

Turning

Gear Milling

Heat Treatment

ID & OD Grinding

Tooth Grinding

Forging

When gears need high performance that needs to withstand high loads, high stress, impact loads or fatigue loads, forgings are suggested to use. Forging allows metal fibers to be continuously distributed along the gear profile, significantly improving root strength and fatigue life.

Turning

This is the process of cutting and shaping solid materials into precise parts. It uses tools like lathes, mills, and drills to remove excess material. Machining transforms a simple block of metal into a finished, functional component.

Gear Milling

Gear Milling is a gear cutting process that used a rotating from cutter shaped to match the exact space between two gear teeth is plunged into the gear blank. After cutting one tooth space, the blank is indexed to the next position .

Heat Treatment

Gears need to be running with two gears or above two gears, that makes them easy to be worn-out. That’s why most types of gears need to be harden through heat treatment.

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ID & OD Grinding

ID grinding, OD grinding, Surface grinding are all belonging to CNC grinding which are the foundational precision abrasive machining processes used to achieve exceptional dimensional accuracy and surface finishes, especially on hardened materials.

Tooth Grinding

Tooth Grinding are the final processes are applied after heat treatment to correct distortion, improve geometry, and achieve the final surface finish necessary for quiet, efficient power transmission.

Inspection

Strict Quality Inspection

Dimension Inspection

Material Testing

Hardness Inspection

Heat Treatment Testing

Roughness Testing

Accuracy Inspection

Meshing Testing

Dimension Inspection

Material Testing

Hardness Inspection

Heat Treatment Testing

Roughness Testing

Accuracy Inspection

Meshing Testing

Download

Download To Learn More

Heat Treatment Report

Packages

Professional Packaging Safe Arrival

Customized cost-effective packages for products protection. We select multi-model solutions, combining air, sea, or land freight for the optimal balance of cost, speed, and reliability.

Inner Package

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Out Package

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Carton

Wooden Package

Your Precision
Transmission Partner

Do you have drawings to be implemented, or problems to be solved? Please feel free to contact us. From initial inquiry and technical specification confirmation to production and delivery, our dedicated team will provide you with one-on-one service, ensuring that every step meets your stringent requirements for precision.

Zero Bevel Gear In Wheel Loaders

Application of Zero Bevel Gear in Wheel Loaders