Zero Bevel Gear

This is a standard product schematic diagram of a Zero Degree (Zerol) Bevel Gear. Unlike cylindrical gears, this type of gear is specifically designed for transmitting motion between intersecting shafts.

Zero degree bevel gears are core components in mechanical transmission systems used to change the direction of power transmission. Their main applications include:

Spatial Directional Transmission

Used to connect two intersecting shafts (typically at 90°, but other angles are also possible), transmitting rotational power from a motor to a working machine at a right angle or a specific angle.

High-Precision and Low-Noise Applications

Because their tooth profile lies between straight bevel gears and spiral bevel gears, the tooth surface contact during meshing is smooth, resulting in extremely low noise and vibration. Therefore, they are widely used in equipment with strict noise requirements, such as automotive differentials, precision machine tools, aerospace equipment, and high-end medical devices.

High Load Capacity Transmission

Compared to ordinary straight bevel gears, zero degree bevel gears have a higher contact ratio and can withstand greater impact loads and torque.

Specification

Module

0.8

Application

Medical Devices

Material

18CrNiMo7-6

Heat Treatment

Carburizing HRC 58-62

Accuracy

ISO 5–6

The Role of Zero Degree (Zerol) Bevel Gears in Medical Devices

Overview of Core Functions

In high-end medical devices, zero degree (Zerol) bevel gears are primarily used to change the direction of power transmission (typically 90°), achieve high-precision, low-noise drive, and compensate for minor installation errors, ensuring smooth, reliable, and quiet operation in clinical environments.

Specific Functions and Roles

Spatial Directional Transmission

Transfers the rotational motion from a motor or reducer to a driven shaft that intersects (usually perpendicular to) the main shaft. Examples include CT gantry rotation drives, surgical robot arm joints, and intraoral scanner turntables.

Low-Noise, Low-Vibration Drive

The tooth surfaces of Zero bevel gears engage progressively, resulting in smoother operation and significantly lower noise compared to straight bevel gears (a reduction of 5–10 dB). This makes them ideal for environments with strict noise requirements, such as operating rooms and imaging suites.

High-Precision Motion Control

After precision grinding and lapping, Zero bevel gears exhibit high rotational accuracy. When paired with servo motors and precision reducers, they enable fine angular adjustments and repeatable positioning, commonly used in surgical robots and precision positioning platforms.

Compact Design with High Load Capacity

Compared to straight bevel gears, Zero bevel gears have a higher contact ratio, allowing them to transmit greater torque within a compact space. They are suitable for driving CT gantries, exoskeleton joints, or pump head mechanisms.

Reduced Bearing Load

With a nearly zero spiral angle, the axial thrust generated is minimal, placing lower demands on bearings and housings. This helps extend the service life of precision support components in medical devices.

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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

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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

Gear-product-package-gear-supplier-Belon

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

The Role of Zero Degree (Zerol) Bevel Gears in Medical Devices