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Spiral Bevel Gears for Marine Outboard Gearbox

Marine outboard spiral bevel gear set for stable, quiet meshing. Custom ratio and matched pairs with inspection reports. Get a quote！

Category: Spiral Bevel Gears Brand: Wenlio

Customization Options
Precision Grade	ISO 1328 grade 5-8 / AGMA 8-12
Gear teeth	Standard full depth
Pressure Angle(α)	20° / 22.5° / 25°
Module	0.5-12
Material	16MnCr5 / 20CrMnTi / SAE 8620 / 40Cr / Other
Heat Treatment	Carburized & Quenched / Q&T / Nitrided
Roughness Ra	Ra0.8 / 1.6 / 3.2 μm
Hardness	Tooth Surface HRC 52–62 / Core HRC 28–38
Process	Hot forging / Cold heading (Cold forging) / Gear shaping / Grinding

Description

Punctual Support

98% On-Time Delivery & 24/7 Tech Support

Quality Assurance

1-Year Warranty & Free Test Report

Manufacturing

IATF 16949:2016-Compliant Production

High Volume

Capacity: Up to 1,250,000 pcs per month

Specifications

Item	Specification	Tipical	Notes
Gear Type	Spiral Bevel Gear	—	—
Module (m)	1 – 5	2–4	As drawing
Pressure Angle	15 – 25°	20°	As drawing
Precision Grade	ISO 1328 6–8 / AGMA 8–10	ISO 8	As drawing
Materials	20CrMnTi / 20CrNiMo / 40Cr / 42CrMo / 45# / Others	20CrMnTi	As drawing
Heat Treatment	Carburized & Quenched / High-frequency Quenched / Nitrided	Carburized	As drawing
Hardness	Carburized & Quenched:Tooth HRC 58–62 High-frequency Quenched:HRC 45–55 Nitrided:Tooth HV 650–1300	Carburized & Quenched:Tooth HRC 58–62 High-frequency Quenched:HRC 48–52 Nitrided:Tooth HV 700–1100	As drawing
Surface Finish	Black Oxide Coating / Electroplating / Phosphate Coating / Passivation	Black Oxide Coating / Electroplating	As drawing
Process	Milling / Forging / Powder Metallurgy	Milling / Forging	As drawing

Download

Download the PDF of product details

Spiral Bevel Gear Machining Service

milling

Milling delivers flexible, CNC-controlled cutting for prototypes and small batches.Ideal for thin-plate parts and non-standard bevel gears where tooling needs to stay agile.

forging

Forging forms dense blanks with improved grain flow for high-load bevel gear applications.
Best for robust gear blanks that require strength before precision machining.

Powder metallurgy

Powder Metallurgy makes near-net-shape gears with consistent repeatability at scale.
Great for small-module or complex geometries, cutting material waste and machining time.

Quality Control

Prior to every shipment, we conduct the following tests and provide complete quality reports for these gears.:
1. Bubble drawing
2. Dimension measurement report
3. Material certification report
4. Heat treatment testing report
5. Accuracy measurement report

Bubble Drawing

Material Certification Report

Dimension Measurement Report

Accuracy Measurement Report

Heat Treatment Testing Report

Packaging

Step 1 – Anti-rust: We wrap each gear with VCI anti-corrosion paper / bag to protect it from rust during shipping.
Step 2 – Inner protection: The wrapped parts are placed properly to avoid scratches and impact.
Step 3 – Carton packing: Then we pack them into strong export cartons (logo printing is available).
Step 4 – Crate & pallet: Cartons are loaded into a reinforced plywood crate with partitions, and fixed on a pallet.
Step 5 – Secure & label: The crate is sealed, strapped, and labeled, ready for sea/air shipment.

We can also provide custom printed color boxes and logo customization (carton, color box, crate marking, labels).
Note: Please ensure the logo/design is authorized by you; if it involves any third-party brand, we will need written authorization to avoid IP risks.

FAQ

How do you support OEM and aftermarket bevel gear programs?

We support OEM and aftermarket programs with drawing review, prototyping, quality traceability, and repeatable production for ongoing supply.

What information do you need to quote custom bevel gears quickly?

For an accurate quotation, please share drawings (preferred), gear type, key interface dimensions (bore/spline/keyway), material requirements, target quantity, and your application basics (load/speed/duty). If you don’t have full data,you can also directly send the samples to us.

Do you support prototypes and low-volume orders before mass production?

Yes. We support prototyping and small-batch runs to validate fit, meshing, and assembly performance before scaling up. MOQ depends on gear design and tooling needs, and we will suggest a cost-effective trial quantity.

How do you ensure consistent quality and traceability for custom gears?

We use controlled production processes with incoming, in-process, and final inspection. Material and process batches can be traced by lot, and records are kept for repeatability on ongoing orders and replacement programs.

What inspection reports and certificates can you provide?

Upon request, we can provide a Certificate of Conformance, material mill certificates, dimensional inspection reports, and other verification documents based on your acceptance requirements and order type.

What is the lead time for custom bevel gears?

Typical lead time depends on design complexity, tooling, and heat-treatment schedule. As a reference, prototypes are often 25–40 days, and production orders are commonly 20–40 days. We will confirm a schedule after drawing review.

How do you handle packaging, shipping, and export documents?

We use export-ready packaging with rust protection and secure cartons or wooden cases as needed. We can ship by air, courier, or sea, and provide standard export documents such as packing list, commercial invoice, and other paperwork required by your import process.