Custom Internal Gears for Planetary Gearboxes - PairGears

Model: custom

Item specifics

Gear Type: Internal Gear

Application: Planetary Gearbox / Gear Reducer / Industrial Transmission

Module(m): Customized

Pressure Angle: 20° / Customized

Precision Grade: ISO 5–8 / AGMA 8–12 / Customized

Material: Alloy Steel / Carbon Steel / Stainless Steel / Customized

Heat Treatment: Carburizing / Nitriding / Q&T / Customized

Hardness: Customized

Manufacturing Process: Gear Shaping / Power Skiving / Grinding / Heat Treatment / Inspection/ Customized

Review

Description

PRODUCT DESCRIPTION

Custom Internal Gears for Planetary Gearboxes

PairGears manufactures custom internal gears for planetary gearboxes, reducers, and industrial transmission systems based on customer drawings, samples, and technical requirements.

Internal gears are important components in planetary transmission systems, where internal teeth engage with planetary gears to achieve compact structure and efficient torque transmission. Gear parameters including module, tooth count, internal diameter, material, heat treatment, and accuracy grade can be customized according to gearbox design requirements.

For planetary gearbox applications, accurate tooth geometry, concentricity, surface quality, and proper gear engagement are essential for stable operation. PairGears provides complete manufacturing solutions from internal gear machining and heat treatment to precision inspection.

For custom gear projects, please contact us with your drawings or specifications for technical evaluation and quotation.

COMPANY DETAILS

Focus on Precision Gears for 20+ Years

PairGears is a technology-driven precision gear manufacturer focused on the R&D, manufacturing, and sales of transmission gears and shafts for trucks, passenger vehicles, agricultural machinery and construction equipment. We pair application engineering with robust production to deliver reliable gearbox components built for high torque, long duty cycles, and demanding field conditions.

Over the years, we have built a vertically integrated operation with 300+ sets of equipment, including CNC lathes, gear hobbing and shaving machines, gear grinders, and in-house heat-treatment lines. Our production and metrology systems—sourced from Germany, the United States, and Japan—underpin consistent quality and strong development capability in gear design, process optimization, and measurement.

Gear Machining Service

BROACHING

High-throughput broaching of internal/external splines and keyways; consistent profiles for precise shaft–hub fits.

GRINDING

Finish grinding to ISO Grade 4–6; improves finish, cuts noise, boosts load/contact uniformity—ideal for high-speed, high-load.

HOBBING

Flexible hobbing for spur/helical gears; stable indexing with consistent pitch and tooth form for volume runs.

HEAT TREATMENT

Carburizing, induction hardening, and nitriding with controlled case depth for hardness and core toughness.

LASER CUTTING

Rapid laser blanking and feature cutting; clean edges, minimal HAZ—ideal for prototypes and small batches.

SHAPING

Shaping for internal teeth, splines, blind hubs; keeps form/concentricity under constraints—for small batches, complex parts.

SHAVING

Pre-finish shaving refines flank topology, lowering noise and improving accuracy before heat-treat/grinding.

MILLING

CNC milling of blanks and datum faces; precise allowance and concentricity for downstream gear machining.

Precision Gear Customization Process

Step 1 — Requirement Collection

Customers share design requirements for custom precision gears and shafts—drawings, specs, load cases, or samples.

Step 2 — Drawing Design

PairGears runs DFM, optimizes geometry from 2D/3D or samples, then sends transmission gear drawings for confirmation.

Step 3 — Product Quotation

After drawings are confirmed, we provide an accurate quote covering material, heat treatment, tolerances, and delivery for precision gears.

Step 4 — Tooling & Mold Making

Upon price confirmation, we produce tooling/fixtures/molds. Tooling costs are paid upfront and refunded after bulk orders.

Step 5 — First Sample Approval

First-article sample in ~30 days for inspection and functional tests; customer checks fitment and gives feedback until approval.

Step 6 — Mass Production

With the approved sample, PairGears schedules batch manufacturing of precision gears and shafts to meet your demand plan.

Step 7 — Finished-Product Inspection

Inspect hardness, key dimensions, runout, tooth profile/lead, surface roughness to ensure 100% compliance; full reports provided.

Step 8 — Shipping Arrangement

After QC pass and customer confirmation, we book and ship globally for ag machinery, truck, and construction gearbox parts.

Brands We Serve

John Deere

Case IH

Valtra

Massey Ferguson

Caterpillar

Eaton

BYD

EXHIBITION

PairGears At The Exhibition

PairGears is a technology-driven precision gear supplier. At shows in the Americas, Europe, and Asia, we meet OEMs and distributors, listen to needs, and introduce our custom gears and shafts for agriculture, trucks, construction equipment, and EVs.

What You'll See At Our Booth

Real parts you can hold and compare—spur/helical gears, bevel sets, planetary parts, and gearbox shafts. Our team will provide a detailed introduction to the processing methods, commonly used materials and approximate delivery dates, and will also answer any questions you have.

How We Help On Site

Bring a drawing, gear photo, or rough specs. We’ll discuss feasibility, suggest practical options, and outline next steps for quotation or sampling.

Stay Updated

Our exhibition schedule, daily highlights, and recap articles will be posted in the website News section and on our social channels (LinkedIn, Facebook, YouTube). Follow PairGears for timely updates!

FAQ

Can You Manufacture Custom Internal Gears for Planetary Gearboxes?

Yes. PairGears manufactures custom internal gears based on drawings, samples, and planetary gearbox requirements.

What Information Is Needed for a Quote?

Please provide the drawing, module, tooth count, internal diameter, material, heat treatment, accuracy grade, and application details.

Can Internal Gear Dimensions Be Customized?

Yes. Internal diameter, tooth geometry, module, and other specifications can be customized according to drawings.

What Manufacturing Processes Are Available?

Internal gears can be produced through shaping, skiving, grinding, heat treatment, and inspection according to project requirements.

Can You Support Prototype and Repeat Production?

Yes. PairGears supports prototype development and repeat production according to confirmed drawings and technical requirements.

AFTER-SALES SUPPORT

Scope

Covers typical issues with installation, fitment, noise, and wear for precision gears, agricultural gears, and transmission shafts.

How To Reach Us

Contact our team via form / email / phone. We respond promptly on business days with practical next steps.

What To Include

PO/Part No. (or OEM No.), machine/gearbox model, issue description (when/conditions), and photos or a short video.

Response & Resolution

Initial assessment → actionable advice (install checks, lubrication, replacement options) → if needed, re-inspection or remake/replacement.

Warranty Summary

Follows your contract/PI. Manufacturing-related defects are handled by repair or replacement as agreed. Overload, poor lubrication, or mis-installation are excluded.

On Receipt & Shipping

Please inspect on arrival. For shipping damage or discrepancies, contact support immediately for assistance.

Our Promise

Clear, plain-language guidance and realistic, workable timelines to reduce downtime and communication costs.

PACKAGING

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Item specifics

Review

Description

PRODUCT DESCRIPTION

COMPANY DETAILS

Brands We Serve

EXHIBITION

PairGears At The Exhibition

What You'll See At Our Booth

How We Help On Site

Stay Updated

FAQ

Can You Manufacture Custom Internal Gears for Planetary Gearboxes?

What Information Is Needed for a Quote?

Can Internal Gear Dimensions Be Customized?

What Manufacturing Processes Are Available?

Can You Support Prototype and Repeat Production?

AFTER-SALES SUPPORT

Scope

How To Reach Us

What To Include

What To Include

Response & Resolution

Response & Resolution

Warranty Summary

On Receipt & Shipping

Our Promise

PACKAGING

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Custom Internal Ring Gears for Planetary Gearboxes - PairGears

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