Where diamond meets precision in wire drawing technology

Welcome to the online showcase of Weilly Diamond Industrial Co., Ltd. on Expometals. With decades of expertise in diamond-based tooling, Weilly Diamond brings a full portfolio of high-precision dies and extrusion tools designed for wire drawing and cable manufacturing. Let’s go over the company’s history, its current offering, and its role within the wire and cable tooling market.

From a local workshop to a global die manufacturer

Founded in 1990 in Taoyuan, Taiwan, Weilly Diamond has evolved from a small local workshop into a globally recognized manufacturer of diamond wire drawing dies and extrusion tools. In 1995, the company became the first in Taiwan to produce shaped diamond dies — a milestone made possible by its strong focus on in-house R&D and precision engineering.

Over more than 35 years, Weilly Diamond has expanded its presence beyond Asia, supplying wire drawing dies across Europe, the Americas, and the Middle East. Today, the company serves a global network of wire and cable producers, all relying on Weilly Diamond’s expertise, consistency, and innovation in diamond die technology.

Precision diamond dies for wire and cable production

Weilly Diamond’s core business centers on the design, manufacture, and distribution of high-precision diamond wire drawing dies.

The company offers a broad and diversified product range, including:

• Natural Diamond (ND) wire drawing dies,
• Polycrystalline Diamond (PCD) dies,
• Monocrystalline / MD (SSCD) dies,
• PCD shaped dies (for non-round wire profiles),
• Nano-diamond coated dies,
• Extrusion tools for insulated wire and communication cables,
• Stranding, shaving, compaction and wire guiding dies.

This product portfolio positions Weilly Diamond as a one-stop partner for wire and cable manufacturers seeking high tool performance, precision, and extended die life.

Value-added services and technical expertise

Beyond standard dies, Weilly Diamond offers die reconditioning and dedicated R&D services — helping customers optimize tooling life cycles and adapt to evolving production needs.

A distinctive attribute is its proprietary diamond reinforcement technique, which increases pre-stress stability, improves durability and extends tool life by up to ~20%.

Quality assurance is integral: Weilly Diamond holds an ISO 9001 certification, and its commitment to quality has been acknowledged with industry awards such as the Taiwan Excellence Award (1996) among others.

Discover more at Weilly Diamond’s online stand on Expometals — and follow the company to stay informed about its latest tooling solutions.