NYY Precision Gears & Transmissions

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Since 1993, NYY has specialized in precision gears and transmission components for demanding industrial applications.

New Yinye specializes in build-to-print manufacturing of large, high-precision and non-standard industrial gears and transmission components for wind power, mining, metallurgy, machine tools, railway and heavy industry. Backed by advanced manufacturing, strict quality control and engineering expertise, we provide OEM and custom solutions for customers worldwide. Serving industries including wind energy, mining, locomotive, marine and heavy equipment.

02/10/2026

Happy National Day — and the Quality Records Behind Every Gear

It’s National Day in China.

At New Yinye Transmission in Wuxi, the holiday changes the rhythm of the factory, but production continues on a rotating schedule to support ongoing customer commitments.

For high-precision custom gears, a drawing is only the starting point.

The real question is whether the required accuracy can be manufactured, measured, verified and documented consistently.

That is why we always encourage customers to look beyond a simple accuracy claim.

For applicable projects, New Yinye Transmission can achieve AGMA 12 / DIN 5, with selected projects reaching DIN 4 after technical review. Actual capability depends on the gear type, size, material, geometry, heat treatment and manufacturing route.

Our maximum gear grinding diameter is approximately 2,500 mm, with module up to approximately 45.

And behind every finished gear is the quality evidence that supports it — material certificates, heat-treatment records, gear accuracy reports, hardness records, NDT documentation and final inspection results, according to project requirements.

We are certified to ISO 9001, ISO 14001 and ISO 45001, but certification is only one part of the picture.

For customers, what matters most is whether the part delivered matches the drawing, the agreed technical requirements, and the inspection records that come with it.

That standard does not change because of a holiday.

From all of us at New Yinye Transmission, Happy National Day.

One question for gear buyers: when you evaluate a new supplier, which document do you ask for first — the gear accuracy report, the material certificate, or the NDT records?

25/09/2026

Happy Mid-Autumn Festival from New Yinye! 🌕✨

The full moon is a symbol of togetherness, connection, and good wishes.

On this special day, we would like to thank all our customers, partners, friends, and colleagues for being part of our journey.

May the bright moon bring you joy, peace, happiness, and success, wherever you are in the world.

Wishing you and your family a wonderful Mid-Autumn Festival! 🥮🌕

18/09/2026

More Than a Factory Visit

Yesterday, we were glad to welcome Liebherr’s mechanical engineering team to New Yinye Transmission.

After touring our production and inspection areas, both teams sat down for an in-depth discussion around project drawings, manufacturability and technical requirements.

Some of the most valuable engineering conversations happen when both sides are willing to put the difficult questions on the table — what is challenging to manufacture, why a certain requirement is necessary, and whether there is a better way to achieve the same functional result.

It was an open and productive exchange, and we were pleased to reach alignment on several important technical points and the next steps.

Our cooperation with Liebherr has continued for more than eight years. We sincerely appreciate the trust, communication and support built over those years.

Looking forward to the next eight years together.

10/09/2026

Repeat Orders Are the Real Test of a Gear Supplier

Eighteen months ago, a matched spiral bevel gear set went into a customer's gearbox.

Last week, the same customer came back with the same drawing number and placed a second batch order.

Same material. Same hardness range. Same accuracy requirement.

And the new batch still has to perform consistently with the first one already in service.

That is where a gear supplier really gets tested.

The first order shows whether you can make the part. Repeat orders show whether you can control the process consistently.

Two manufacturers can work from the same drawing and still produce very different results. The difference is often found in everything around the drawing: process control, heat-treatment verification, inspection, traceability and documentation.

For high-precision gears, consistency means checking more than final dimensions.

Depending on the project, inspection may include tooth profile, lead, pitch, radial runout, surface roughness, hardness, material verification, NDT and grinding-burn inspection.

For spiral bevel gear sets, rolling tests and contact-pattern checks can also be used to verify meshing before shipment.

Material certificates and heat-treatment records are reviewed against project requirements, while final inspection records provide a clear quality trail for the customer.

At **New Yinye Transmission**, we manufacture custom high-precision gears and transmission components to customer drawings for demanding industrial applications.

Our capabilities cover cylindrical gears, gear shafts, spline shafts, internal and ring gears, spiral bevel gears and other custom transmission components.

For applicable projects, gear accuracy can reach **AGMA 12 / DIN 5**, with selected projects reaching **DIN 4** after technical review. Maximum gear grinding diameter is approximately **2,500 mm**, with module up to approximately **45**.

For customers managing repeat production, long-term supply or second-source programs, the objective is straightforward: reduce variation from one batch to the next and keep both the product and the quality documentation consistent.

Because a repeat order should not feel like starting over with a new supplier.

For those working with high-precision gears: when a repeat batch is not quite right, what usually reveals it first — inspection data, contact pattern, assembly, or the test stand?

28/08/2026

Evaluating High-Precision Gears? Look Beyond the Drawing.

If you’re sourcing custom high-precision gears, the drawing is only part of the story.

The real question is whether a supplier can hold the required tolerances at the size and volume you need — and provide evidence that the finished parts consistently meet those requirements.

At New Yinye, we often receive drawings for large helical gears, precision gear shafts, ring gears, or other custom gears manufactured to customer drawings. A specification may call for DIN 5 or AGMA Quality 12, but machining the tooth form is only one part of achieving that result.

Material condition, heat treatment, distortion control, tooth profile, lead, pitch, surface finish and final inspection all influence whether the requirement can be maintained through production.

So how should buyers evaluate a potential supplier before committing to a project?

In our experience, three checkpoints matter.

1. Manufacturing capability that matches the part

For large or complex high-precision gears, the machining envelope matters.

New Yinye operates a manufacturing facility of approximately 25,000 m² in Wuxi, China, with capabilities including CNC gear cutting, precision gear grinding, five-axis machining, turn-mill machining and precision finishing.

On applicable gear-grinding equipment, the maximum grinding diameter is approximately 2,500 mm, with module capability up to approximately 45 mm.

At the same time, smaller parts can also be evaluated when the project involves higher precision, complex geometry or demanding technical requirements.

2. Quality systems backed by inspection evidence

Precision claims should be measurable.

New Yinye is certified to ISO 9001:2015, and our inspection capabilities cover gear geometry, dimensional accuracy, material verification, hardness, mechanical properties, non-destructive testing and other project-specific checks.

Our stable precision capability includes:

GB Grade 4 / ISO Grade 4 / DIN Grade 5 / AGMA Quality 12
Selected products can reach DIN Grade 4, subject to gear type, size, material, heat treatment, geometry and technical review.

3. Long-term batch performance

Producing one good sample is important.

Maintaining the same quality across hundreds or thousands of parts is harder.

New Yinye has supplied more than 10,000 gears for wind turbine main gearbox applications over more than five years of continuous cooperation, with stable batch performance during that period.

For another European customer, approximately 2,000 custom gears for furnace-top gearboxes in steelmaking equipment have been supplied over more than ten years, together with customer recognition for quality and supplier performance.

These references matter because they show more than dimensional capability. They show whether process control can be sustained over time.

When evaluating a high-precision gear supplier, compare the evidence behind the claims:

- Manufacturing capability
- Inspection records
- Quality systems
- Process control
- Long-term batch performance

A drawing defines the requirement.

The supplier’s process and verification system determine whether that requirement can be repeated in production.

If you are currently evaluating a gear supplier, send us your drawing and technical requirements. We can review manufacturability, process route and inspection requirements with you.

Email: [email protected]

When qualifying a new gear supplier, which evidence matters most to your team: inspection data, process capability, or long-term batch performance?

25/08/2026

Here’s a closer look inside our shop as we finish-turn a wind power shaft.

Large workpiece, steady cutting and plenty of attention to detail. It’s a straightforward process, but watching the surface take shape never gets old.

More real machining moments from the New Yinye shop floor.

18/08/2026

When a Custom Gear Drawing Needs Proof, Not Promises

A drawing tells a gear manufacturer what needs to be made.

What gives buyers confidence is everything behind it — machining capability, process control, inspection, documentation, and the ability to repeat the same result across multiple batches.

For custom high-precision gears, procurement and engineering teams usually want answers to a few practical questions:

Can the supplier handle the required diameter and tooth form?Can the specified accuracy be verified?And will the second batch match the first?

At Jiangsu New Yinye Transmission Electromechanical Co., Ltd. (New Yinye) in Wuxi, China, we manufacture large, high-precision and non-standard gears primarily to customer drawings and mutually confirmed technical requirements.

Our manufacturing capabilities include CNC gear cutting, gear shaping, precision gear grinding, 5-axis machining and turn-mill machining.

For applicable projects:

Gear grinding diameter: up to approximately 2,500 mm

Maximum module: approximately 45 mm

Accuracy requirements such as DIN 5 / AGMA Quality 12 or higher can be evaluated according to gear type, size, material, heat treatment and process conditions

Products include spur gears, helical gears, double helical gears, ring gears, internal gears, bevel gears, gear shafts, spline shafts and pinion shafts.

But manufacturing capability is only part of the picture.

Depending on project requirements, inspection can cover tooth profile, lead, pitch, radial runout, surface roughness, material composition, hardness, ultrasonic testing, phased-array ultrasonic testing, grinding-burn inspection and final dimensional verification.

Material certificates, gear accuracy reports, hardness records, NDT records and final inspection reports can also be provided as agreed.

Long-term supply history gives another kind of proof.

For a European steel-industry customer, New Yinye has supplied approximately 2,000 custom gears for furnace-top gearboxes over more than 10 years.

In wind power, more than 10,000 gears for wind turbine main gearbox applications have been supplied over a cooperation period of more than five years, with stable batch quality and no major quality complaints.

For critical industrial gears, a drawing is the starting point.

The real evidence comes from what can be manufactured, measured, documented and repeated.

10/08/2026

Turning in progress at NYY. ⚙️

Not every manufacturing step needs to look complicated to matter.

This is a closer look at a turning process for an industrial transmission component — from setup and machining to the surface gradually taking shape.

It may be one of the more fundamental processes on the shop floor, but consistent ex*****on at every stage is what supports the quality of the finished part.

06/08/2026

Understanding DIN 5 and AGMA 12: Precision You Can Verify

Precision requirements such as DIN 5 and AGMA Quality 12 are frequently mentioned in gear manufacturing. But what do they actually mean when you need custom precision gears manufactured to customer drawings?

New Yinye Transmission—Jiangsu New Yinye Transmission Electromechanical Co., Ltd.—is a custom gear manufacturer in Wuxi, China, specializing in large, high-precision, complex and non-standard industrial gears and transmission components.

Projects are primarily manufactured to customer drawings and mutually confirmed technical requirements. Where technically feasible, selected sample-based projects may also be considered after measurement and manufacturability review, together with appropriate process optimization recommendations.

Gear accuracy refers to measurable geometrical deviations such as tooth profile, lead, pitch and radial runout. Surface roughness and other dimensional requirements are specified and verified separately.

For applicable products, New Yinye can achieve DIN Grade 4 or AGMA Quality 12, subject to the applicable standard and technical review. DIN and AGMA quality grades should not be treated as direct equivalents. The achievable accuracy depends on the gear type, size, material, structure, heat treatment and manufacturing process.

For bevel and hypoid gears, accuracy is evaluated according to the applicable bevel-gear standard rather than the cylindrical-gear classification system.

Custom production covers cylindrical gears—including spur, helical, double-helical and herringbone gears—as well as ring gears, internal gears, spiral bevel gears, straight bevel gears, pinion shafts, gear shafts, spline shafts, machine main shafts and custom precision gearboxes.

Materials can include alloy steels such as 42CrMo, 20MnCr5 and 18CrNiMo7-6, as well as other customer-specified materials. Heat-treatment requirements may include carburizing, nitriding, induction hardening or through hardening, depending on the drawing and mutually confirmed technical specification.

The company’s approximately 25,000 m² facility includes large CNC gear cutting, gear shaping, precision gear grinding, five-axis machining, turn-mill machining and precision finishing equipment.

Maximum gear-grinding diameter is approximately 2,500 mm, with a maximum module of approximately 45. This equipment supports the manufacture of large ring gears, gear shafts, spiral bevel gears and other complex transmission components.

Quality management is supported by ISO 9001:2015 and ISO 14001:2015 certification. Inspection capabilities cover tooth profile, lead, pitch, radial runout, material composition, hardness, ultrasonic testing, phased-array ultrasonic testing, grinding-burn inspection and dimensional inspection of large components.

Material certificates, heat-treatment records, gear accuracy reports, hardness records and final inspection reports can be provided according to project requirements.

If you are evaluating custom gears for industrial gearboxes, wind power, marine gearboxes, mining, metallurgy, machine tools or similar demanding applications, the next step is to share your drawing or available technical information for a feasibility review.

Which standard and accuracy grade do you normally specify for large custom gears—DIN 6, DIN 5, DIN 4 or AGMA Quality 12?

Contact Jane at New Yinye Transmission:
📧 [email protected]
🌐 www.wxnyy.com

03/08/2026

New Product | High-Speed Pinion Shaft for Integrally Geared Centrifugal Compressors

Precision has to be verified before a component enters service.

This high-speed pinion shaft is designed to operate with the corresponding bull gear assembly in an integrally geared centrifugal compressor. Manufactured from 40CrNiMoA and treated by nitriding, it achieves ISO Grade 5 gear accuracy, with both total runout and concentricity controlled within 0.005 mm.

Inspection includes:

• Gear profile, lead and runout
• CMM inspection of concentricity and thrust-face angle
• Surface roughness measurement
• Hardness and nitrided case-depth testing
• Magnetic particle inspection
• Residual magnetism below 2 GS

Custom manufacturing is available based on customer drawings and confirmed technical requirements.

📧 [email protected]
🌐 www.wxnyy.com

Address

Wuxi

Telephone

0510-85251139

Website

https://www.wxnyy.com/, https://www.wxnyy.com/About-Us/#saq, https://www.wxnyy.com/About-Us/#saq

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