Sustainability and Quality Assurance

Building Manufacturing That Connects the Future

We aim to create manufacturing that works in harmony with the global environment.
By combining innovative technology with sustainable materials, we help optimize resources, reduce waste, and support a more sustainable society.
Our mission is to build a better future for the next generation through the products we deliver.

Less Waste, More Value

We work to minimize waste generated during production.
Through precise design and efficient use of resources, we are building an environmentally responsible production system.
We will continue reducing environmental impact while delivering products that create real value.

MTL’s Initiatives

To reduce waste, MTL may ship products with minor cosmetic marks only when they do not affect performance.

Reducing Scrap Rate

We are reviewing the acceptance criteria for certain parts, such as housings, that were previously discarded due to small cosmetic marks that do not affect product performance.
Because a certain amount of scrap occurs throughout the year, this effort is expected to reduce total waste.
From a sustainability perspective, by appropriately revising standards for areas that do not affect function, we can achieve both more effective use of resources and lower environmental impact.

100% Inspection During Production

To deliver high-quality products, MTL performs 100% inspection on all products during production.
We verify that every unit meets specifications, and we ship only products that pass our quality standards.

This allows us to provide reliable products consistently and earn the trust of our customers.

Warranty

Our products are managed under a strict quality assurance system and undergo multiple tests. If a defect occurs, we will support you with a free replacement.

Warranty period: 1 year after the start of use, within 1.5 years after delivery, or 2,000 operating hours, whichever comes first. Warranty coverage: If a failure occurs due to our responsibility within the above period, we will repair or replace the product free of charge.

This warranty applies only to the delivered product itself. Costs related to replacement work and any consequential damages are not covered by MTL.

Cosmetic Mark Acceptance Criteria

1) Case Marks

Light scratches on the exterior case do not prevent the product from performing its intended function.

However, dents or deep impact marks may come into contact with internal parts or cables and could cause a short circuit, so such parts are not used.

2) Base Marks

Light scratches on the exterior do not prevent the product from performing its intended function.

We also define acceptance criteria for small cavities, or porosity, that can occur during the base-part manufacturing process. Items larger than our acceptance standard are not used.

3) Cable Marks

Surface scuffing on cables is acceptable.
However, cuts or sharp bends are not acceptable because they may cause wire breakage or short circuits.

For other components built into the product, we do not use any parts that may negatively affect product function.

FAQ, Cosmetic Marks on μDD Motors