Bevel Gears
Geyontech straight and spiral bevel gears. Precision milling and grinding for high-speed heavy-load applications.
Precision gear manufacturing since 2020
Gears engineered for applications where accuracy is not negotiable
Geyontech designs and manufactures high-precision gears and transmission components in Dongguan, China — for gearbox builders, robotics and automation integrators, and equipment OEMs who measure quality in microns, not in price per piece.
Drawing or STEP file in, manufacturability feedback and a quotation out — reviewed by an engineer, not a sales desk.
- DIN 3 Grinding accuracy
- M0.3–M20 Module range
- Grade 4–5 Batch accuracy
- 13 yrs Gear experience
Gears and transmission components for industrial gearboxes, robotics, precision motion platforms, machine tool OEMs and clean-environment equipment
- Industrial gearbox builders
- Robotics & automation
- Precision motion platforms
- Machine tool & equipment OEMs
- Vacuum & clean-environment equipment
- Transmission parts distributors
Products
Precision gears and transmission components
Nine product families, all made to drawing. If your requirement sits between two of them, that is the part we are built for.
CNC Machined Parts
Geyontech CNC machined parts. Bushings, flanges, housings and custom parts. ±0.005mm precision.
Custom Gears
Geyontech custom gear manufacturing from drawings. Non-standard modules and special profiles, reviewed by an engineer before quoting.
Magnetic Drives & Assemblies
Geyontech magnetic drives and assemblies. Non-contact torque transmission, zero leakage magnetic couplings.
Precision Gear Racks
Precision gear racks — helical/straight, ground DIN 6h25 and milled DIN 8e27/10e27, S45C steel, hardened HRC48-52, module M1–M12, 500/1000mm, joinable to any length.
Shafts & Splines
Geyontech precision shafts and splines. Drive shafts, spline shafts, gear shafts. Tolerance h6~h7.
Sprockets & Roller Chains
Drive / conveyor / duplex / custom sprockets, pitch 6.35–50.8mm, 9–80 teeth, hardened teeth HRC45–55, GB class 6–8, with A/B series roller chains.
Spur & Helical Gears
Geyontech high precision ground spur and helical gears. DIN 3 grinding, module M0.5~M20, up to Φ800mm.
Worm Gears & Worms
Geyontech precision worm gears and worms. Z1~Z6 profiles, bronze worm gears, steel worms.
How we work
An engineering partner, not just a gear supplier
The difficult jobs are the ones we want: tight tolerances, awkward materials, complex geometry, low backlash, and the same quality in batch ten as in batch one.
- We engage before the drawing is frozen Manufacturability, tolerance stack, material and heat treatment get reviewed early, so problems are found on paper rather than in the first article.
- Accuracy is specified, then proven Tooth geometry, case depth and grinding stock are written into the process, then verified on a gear measuring centre and CMM.
- Documentation ships with the parts Every lot leaves with an inspection report. No chasing, no re-measuring on your side.
Case studies
Projects we were brought in to solve
Where a standard catalogue part was not going to work, and what we did about it.
DIN 3962 class 5, 0.7~0.9 mm carburizing, 4000 pcs/year: Grinding process for upgrading medium-module gears from class 7 to class 5
In September 2026, a complete machine manufacturer in Poland that builds screw hoists (LTT260 series) sent 7 drawings to Geyon Transmission. Four of them were m3.5 spur gears (z31, z45), material 16Mn
M0.3 Small Module Gears, ISO 5-6 Grade, 5 Models 20,000 Pieces: How to Control Quality in a Bulk Order for a Transmission Parts Trader?
In August 2026, a transmission parts trading company from East China came to Geyon Transmission with drawings from an end customer: five models of small module gears, modules 0.25 and 0.3, precision I
m0.6 Small-Module Planetary Gear Set with 0.008 mm Span Tolerance: Manufacturing Review for Swiss Actuator Project
In August 2026, a Swiss manufacturer of actuators (Actuator 6016, 3D printed housing) sent drawings for a planetary gear set to Geyon Transmission: 4 parts, module 0.6, accuracy Grade 7, material 16Mn
- DIN 3 Finest grinding accuracy available, module dependent
- M0.3 – M20 Module range for cut and profile-ground gears
- Grade 4–5 Typical batch gear accuracy to ISO 1328
- 13 yrs Team experience in gear transmission manufacturing
What we deliver
Five things every shipment has to clear
Precision
Grinding accuracy up to DIN 3, with tolerances controlled on every batch.
Consistency
Batch-to-batch dimensional and gear accuracy held inside a written process window.
Engineering
Drawing review, process planning, prototype, validation, then series production.
Inspection
Gear measuring centre, CMM, hardness and surface checks in house.
Traceability
Material certificates, process records and an inspection report with every shipment.
From drawing to delivery
How an order actually runs
Four stages, each one ending in something you can check.
Drawing & DFM review
You send a 2D drawing or 3D model. We review manufacturability, tolerance stack, material and heat treatment, then confirm what is achievable before anything is quoted.
1–3 daysProcess planning & material
Tooth geometry, tooling and process route are fixed, and material is sourced with traceability. Hardness, case depth and grinding stock are specified in writing.
3–7 daysCutting, heat treatment & grinding
CNC hobbing, shaping and bevel cutting, controlled carburising or nitriding, then profile and generating grinding on the accuracy the drawing calls for.
2–5 weeksInspection & documentation
Gear measuring centre, CMM, hardness and surface checks per lot. You receive the inspection report with the shipment, not on request.
per batch
Technical library
Engineering answers, with the numbers in them
Module selection, ISO 1328 grades, case depth, profile shift, inspection reports — the reasoning behind the tolerances we quote.
How to Read a Gear Inspection Report: Three Deviation Types, Tolerance Sources and Three Overlooked Judging Details
How to Read a Gear Inspection Report: Three Deviation Types, Tolerance Sources and Three Overlooked Judging Details Core answer: A gear inspection report comes down to three groups of numbers — pitch deviation (fpt single pitch, Fp total cumulative pitch), profile deviation (Fα / ffα / fHα), and helix (lead) deviation (Fβ / ffβ / fHβ)
Soft or Hard Tooth Flank? The 350 HBW Dividing Line That Decides Gear Material, Heat Treatment and Machining Sequence
Soft or Hard Tooth Flank? The 350 HBW Dividing Line That Decides Gear Material, Heat Treatment and Machining Sequence Core answer: when selecting gear materials, first determine the tooth surface hardness, then look at the steel grade. In engineering practice, 350 HBW is taken as the dividing line between soft and hard tooth surfaces —
Custom Gear Process for High-End Equipment OEMs: Drawing to Qualified Parts
Gears in high end equipment are rarely standard shelf items. Semiconductor tools, medical instruments, precision machine tools and automation cells call for gears that are fine module, odd tooth, or e
Questions
Before you send a drawing
What do you need in order to quote a gear?
A 2D drawing or 3D model with module, tooth count, material, accuracy grade and quantity. An engineer reviews manufacturability, tolerance stack and heat treatment before we quote — so the price and accuracy we quote are ones we can hold in production.
Can you take on prototypes and small validation batches?
Yes. Prototype and validation runs are a normal first stage for us, not a favour. The same process control, material traceability and inspection reporting apply whether the batch is ten pieces or ten thousand.
How long will an order take?
It is set by tooth geometry, material, heat treatment and grinding requirements. We give a firm production schedule with the quotation and plan the process around it — the timeline follows the process, not a sales promise.
Can you provide free samples?
Samples are available for standard products (shipping cost borne by customer). For custom products, sample cost is assessed by complexity and refunded with batch orders.
What payment methods do you accept?
We accept T/T bank transfer, L/C, Alipay/WeChat Pay and more. Monthly settlement negotiable for long-term partners.
Do you offer discounts for bulk orders?
Yes, bulk orders receive quantity-based discounts. Annual framework customers enjoy additional benefits. Contact our sales team for details.
Send us a drawing — get engineering feedback first
Upload a 2D/3D drawing (STEP, DXF, PDF) — we reply with a quote and lead time.