US Synthetic Bearings Site

PCD Insert (Nib) Sizes

Polycrystalline dies use an abrasion-resistant PCD insert (nib) at the core of each die. Typically the selection of the insert is based on the hole sizes for the die (new & recut sizes). More


There are four primary parts to the geometry of a wire drawing die. Each one serves an essential role in successfully drawing wire.

Typical Geometries

Hard Wire

Typical R/A & BL for PCD - Hard Wire

Soft Wire

Typical R/A & BL for PCD - Soft Wire

Bunching/Stranding with PCD

Bunching/Stranding with PCD

Area of Reduction

The area of reduction is determined by:

Download Area of Reduction Calculator