0.68 Caliber Aluminum Ball 17.27mm Reusable, Factory Direct
| Key Specifications at a Glance | |
| Parameter | Specification |
| Nominal diameter | 17.27 mm (.68 caliber / 0.680 in) |
| Diameter tolerance | ±0.025 mm (std) / ±0.013 mm / ±0.005 mm (selectable) |
| Alternative oversize | 17.27 mm (.684 in) for worn or oversized bores |
| Material | 1000-series aluminum alloy (6061 / 6063 / 1070 options) |
| Density | 2.70 g/cm³ |
| Nominal weight | ≈ 7.3 g (≈ 7.2–7.4 g across tolerance and alloy) |
| Sphericity | ≤ 0.02 mm |
| Surface roughness | Ra ≤ 0.4 µm (polished) |
| Hardness | ≈ 30 HB (annealed 6061-O) up to ≈ 95 HB (6061-T6) |
| Finish | Polished natural, clear anodized, or colour anodized |
| Magnetic response | Non-magnetic |
| Corrosion | Rust-free; oxide film self-repairs in air |
| Reusability | Reusable after inspection and cleaning |
| Packaging | 50 / 100 / 250 / 500 pc resealable jars and bulk cartons |
| MOQ | 500 pcs (stock sizes) · OEM 5,000 pcs |
Our Solid Aluminum Ball Photos
| Applications & Compatibility | |
| Platform / Use | Typical Configuration |
| .68 caliber paintball markers | Accuracy drills, chronograph tuning, zeroing, scenario props |
| CO₂ less-lethal launchers (T4E HDR 68 / HDS, Byrna, and similar .68 platforms) | Training and function testing without payload rounds |
| Air-gun and pneumatic .68 launchers | Bench testing, energy measurement, barrel break-in |
| Slingshots and slingbows | Target knock-down, backyard plinking |
| R&D and OEM development | Dummy rounds for magazine, hopper and feed-system testing |
| Industrial and decorative use | Non-sparking media where a metal sphere of 17.3 mm is required |
Manufacturing & Quality Control
Every ball passes the same production chain, and each stage exists to protect one property: roundness, diameter and surface finish.
1.Wire drawing & cold heading
aluminium wire is drawn to the required gauge, then cut and cold-headed into a near-sphere blank. Cold
heading consolidates the grain flow and gives a repeatable starting mass.
2.Flashing removal
the heading seam is removed so no raised band survives into the finishing stage.
3.Grinding & lapping
blanks are ground between plates to bring diameter inside the target window, then lapped to reduce sphericity error and surface roughness.
4.Polishing
the surface is brought to a low-friction finish, which reduces drag in the barrel and improves shot-to-shot consistency.
5.Heat treatment / temper (optional)
annealed, T6 or intermediate tempers are available depending on whether you want maximum ductility for reusability or maximum hardness for surface durability.
6.Washing & drying
residues from lapping media are removed; parts are dried and inspected for staining.
7.Dimensional sorting
100% automatic gauging and optical sorting, with manual sampling against certified masters. Out-of-tolerance pieces are rejected, not re-worked into another grade.
8.Final inspection & lot release
diameter, sphericity, weight distribution, surface condition and appearance are recorded per lot, with a certificate available on request.
What you can specify on an OEM order
Alloy: 1070 / 1050 (softest, most ductile) · 6061 / 6063 (balanced) · 7075 (hardest, heaviest)
Diameter: 17.27 mm standard, 17.37 mm oversize, or a custom value inside the .68 caliber window
Tolerance: from ±0.005 mm
Finish: polished natural, clear anodized, or anodized in a colour of your choice
Marking: laser marking or engraved identification on request
Packaging: private-label jars, colour sleeves, bulk cartons, or bulk bags
Documentation: material certificate, dimensional report, batch traceability
Ordering, Packaging & Shipping
Stock sizes ship from inventory with no tooling cost; custom diameters and tempers require a tooling and first-article approval step.
MOQ: 500 pcs for stock sizes, 5,000 pcs for custom work; sample orders available for evaluation.
Lead time: typically 7–15 days for stock, 20–30 days for custom production, confirmed at order.
Packaging options: resealable jars (50 / 100 / 250 / 500 pcs), cartons, or bulk.
Documents for export: commercial invoice, packing list, material certificate and, where needed, a non-hazardous declaration.
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