Bearings - 4mm x (13) x 3/64"

4mm pivot diameter · 13 ceramic balls · 3/64" ball size

Swapping to Skiff Workshop bearings is one of the most noticeable upgrades you can make to a folding knife — more blade support, less pivot tightening required, and a smoother feel from the first open. Designed and made in the USA.

Skiff Workshop cage bearings are CNC machined from solid phosphor bronze, an alloy valued for its strength, corrosion resistance, and naturally self-lubricating properties. Each cage is designed to hold more balls around the pivot than standard bearings, distributing load evenly and keeping the blade stable under use.

The balls are Grade 5 silicon nitride ceramic, made to within 5 millionths of an inch of perfect roundness. Harder and lighter than steel, ceramic balls generate less friction and maintain consistent performance over time. The balls are captured in the cage and remain free-floating inside for smooth, consistent rotation.

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Details

• Grade 5 silicon nitride ceramic balls
• CNC machined solid phosphor bronze cage
• Made in the USA
• One set equals two individual cage bearings

Dimensions