A single-crystal diamond burnishing tool completes dimensional trimming and mirror polishing in an instant. By rolling a highly polished single-crystal diamond under pressure over the workpiece surface, the tool produces a bright, smooth, and tough finish with extremely high dimensional accuracy — and the burnish-hardened surface carries load better than a ground one, at a fraction of the cost and time.
Burnishing is a low-cost, high-efficiency process that strengthens and mirror-finishes workpiece surfaces. A high-precision, highly polished single-crystal diamond is pressed against the workpiece and rolled across it. As the applied pressure exceeds the yield point of the part material, the shallow surface layer undergoes cold extrusion and deforms plastically — flattening the machining marks and producing a bright, smooth, and tough surface.
● One-pass result: Dimensional trimming and mirror surface polishing are completed in a single, instantaneous operation.
● Extremely high dimensional accuracy: The rolling action corrects size while it polishes.
● Stronger surface: The burnish-hardened surface offers higher load-bearing capacity than a surface produced by grinding.
● Rapid, low-cost, high-quality: No abrasive, no secondary polishing step — machining is fast and economical while quality is high.
| Advantage | Details |
| Flexible design | The smallest internal-hole diamond burnishing tool can access bores as small as 10 mm |
| Long service life | Eight usable contact points on the rotating diamond spherical surface |
| Wide applicability | One single tool burnishes workpieces of various sizes and profiles |
| Hard materials | Capable of burnishing materials up to HRC 60 hardness |
| Diamond radius options | R 1.0 / 1.2 / 1.5 / 2.0 mm |
| Custom connection | Shank / arbor connection customized to customer requirements |
The rotating diamond head is the key to tool life: as one contact point wears, the sphere is simply indexed to the next of its eight usable points — keeping production running without replacing the tool.
For workpieces that demand both dimensional precision and a mirror-smooth, load-bearing surface, single-crystal diamond burnishing replaces slow grinding and polishing steps with one fast rolling pass. Our burnishing tools reach bores from 10 mm upward, handle materials up to HRC 60, and are built with customizable shank connections to drop directly into your existing setup.
Tell us your workpiece material, hardness, and target surface finish, and we will recommend the diamond radius and tool configuration that fit your application.
A low-cost, high-efficiency process in which a polished single-crystal diamond rolls under pressure across the workpiece surface. When the pressure exceeds the material's yield point, the shallow layer deforms plastically by cold extrusion, producing a bright, smooth, and tough surface.
The burnish-hardened surface has a higher load-bearing capacity than a surface produced by grinding, and it is obtained in a single rapid pass with lower cost.
Our single-crystal diamond burnishing tools can burnish materials up to HRC 60 hardness.
Yes. One single tool can burnish workpieces of various sizes and profiles, and the smallest internal-hole tools can access bores as small as 10 mm.
