What Information Is Required to Manufacture a Custom Spiral Bevel Gear?

What Information Is Required to Manufacture a Custom Spiral Bevel Gear?

One of the most common problems in custom gear sourcing is incomplete technical information.

A buyer may send only an outside diameter and number of teeth and ask for a quotation. For precision bevel gears, that is often not enough.

Providing complete information at the beginning helps shorten technical evaluation and reduces the risk of manufacturing errors.

1. Gear Drawing

A complete manufacturing drawing is the preferred starting point.

Important dimensions may include:

• Number of teeth
• Module
• Pitch diameter
• Outside diameter
• Face width
• Bore diameter
• Keyway
• Mounting holes
• Shaft angle
• Rotation direction

Dimensional tolerances should also be shown where necessary.

2. Matched Gear Information

Spiral bevel gears normally work as a gear pair.

If only one member of an existing pair is being replaced, the manufacturer needs enough information about the mating gear to ensure proper tooth contact.

For replacement projects, providing both components or detailed measurements can reduce compatibility risks.

3. Material

The material influences strength, toughness, heat-treatment response and cost.

Typical custom gear materials include carbon steel and alloy steel.

If the material is not specified, tell the manufacturer about the application, transmitted power and working conditions so that an appropriate option can be discussed.

4. Heat Treatment and Hardness

Hardness requirements should be clearly stated.

Depending on the design, custom gears may use:

• Carburizing and quenching
• Nitriding
• Induction hardening
• Quenching and tempering

Available hardness specifications can include HB220–280 or HRC45–62 depending on the gear design and heat-treatment process.

5. Accuracy Requirement

Not every application requires the same accuracy.

A slowly rotating crusher gear and a precision gearbox may have very different requirements.

Specifying the required accuracy grade allows the manufacturer to choose the appropriate machining and inspection process.

6. Operating Conditions

Useful information includes:

• Input power
• Torque
• Rotational speed
• Gear ratio
• Daily operating hours
• Lubrication method
• Working temperature
• Shock loading
• Required service life

This information helps engineering teams assess whether the proposed gear design is appropriate.

7. Quantity

Prototype production and batch manufacturing require different production planning.

Ruida supports custom manufacturing, including single-set projects, which is particularly useful for replacement gears and non-standard industrial equipment.

What If No Drawing Is Available?

For older machinery, drawings may have been lost.

In such cases, gear surveying and reverse engineering can be considered. Ruida lists gear surveying and mapping, gear design, strength calculation and process planning among its technical services.

CTA:
Send your drawing, sample photos and operating information to our engineering team. We can review your custom bevel gear requirements before production.