Ballpoint Pen Balls
We supply millions of ballpoint pen balls per month to top European and U.S. manufacturers to the most stringent specifications at highly competitive prices. We offer various materials and finishes to suit any ink and design. We manufacture sizes from 0.4mm to 2.0mm and can surprise you with our fast lead times. We take care of all importation procedures and deliver to your door.
Please enquire even if your specifications aren't listed below.
Materials
| Material | Composition | Hardness (Ra) | Density |
|---|---|---|---|
| U-2 | 94.0% WC, 6.0% Co | 90.5-91.5 | 15.00g/cc |
| U-3 | 85.5% WC, 12.0% Co, 2.5% Cr | 91.0-91.5 | 14.15g/cc |
| U-4 | 90.0% WC, 7.5% Co, 2.0% Cr, 0.5% Ni | 91.5-92.5 | 14.30g/cc |
Surface Finish
| Grade | Units | Spec |
|---|---|---|
| FSS | Ra, microns, mm | <0.0125 |
| FS | Ra, microns, mm | 00125 - 0.025 |
| HR | Ra, microns, mm | 0.05 |
| RR | Ra, microns, mm | 0.10 |
Tolerances
Example for 1.4 mm finished ball:Sphericity: 0.0002 mm
Diameter var. per unit container: +/- 0.00025mm
Diameter var. per unit shipment: +/- 0.0020mm
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