Nubatama Bamboo #320 (Platinum)
$103.04
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Nubatama Bamboo #320 (Platinum)
$103.04
5 in stock
A Platinum-grade coarse stone. Ken Schwartz used Platinum for the pure white stone at a given grit — very high abrasive density, slow to dish, and priced accordingly.
| Feature | Specification |
|---|---|
| Brand | Nubatama |
| Type | Synthetic |
| Grit | #320 (Coarse) |
| Series | Bamboo (Platinum) |
| Binder Hardness | Standard |
| Profile | 205 × 75 × 30mm Flat |
Buy This Stone If You're
- Setting bevels on tough, high-alloy steels where a standard coarse stone bogs down.
- Building a fast, slow-dishing progression rather than replacing stones often.
- Following coarse repair work with a step that refines while still cutting hard.
Water
Nubatama range stones should not be permasoaked. Let dry fully before storage.
Progression Ideas
- Preceding Step (Lower Grit): Nubatama Bamboo #150, #180 or #220 Black.
- Following Step (Higher Grit): A 600-grit Platinum, or a 1000-grit stone.
Ken Schwartz Video
Notes
- Ken set a bevel on D2 with this stone and described the sequence as running like soft stainless.
- The anchor of his 150 Bamboo → 320 → 600 → 1500 → 3000 Platinum progression.
- Harder than the Ume 320 Green, which is the softer stone at this grit.
Read More
- Nubatama Platinum Series — 320, 600 & 1500 – A detailed owner review across three Platinum grits after sampling ten stones in the range.
- Nubatama 6k Platinum Announcement – A summary of the whole Platinum group and the steels it was built to handle.
- Serious Nubatama Plus Natural Plus Setup – A full high-end progression built from these stones into naturals and diamond.
- Quick Overview Of Nubatama Stones – A tour of the whole line and which coarse grits earn their place in a kit.
- Learn From My Mistakes… Stones Cracking – Permasoaking and drying guidance for the full Nubatama range, and why it matters.
Condition
- Stone: New and unused.
- Packaging: While our inventory is new, the original packaging may show minor shelf wear, scuffing, or external softening due to warehouse storage and handling over the last five years. Internal protective wrapping (plastic or paper) may show signs of handling, minor tears, or may occasionally be absent—this never affects the condition of the stone itself.
Shipping
Orders are typically processed and shipped same day from Santa Maria, CA.
Every stone ships in a new, high-quality box, individually wrapped in bubble wrap and packing paper for maximum protection in transit.
Please reach out with any questions before or after purchase — happy to help.
Return policy
At Pacific Waterstone, we stand behind the authenticity and quality of every stone we sell.
Incorrect or Mislabeled Items
If you receive an item that is mislabeled, damaged, or significantly mischaracterized in its listing, we will make it right. You may return the item for a full refund or exchange with no restocking fees, and we will cover all return shipping costs.
Standard Returns
If you change your mind or wish to return an item for any other reason:
- Returns are accepted within 14 days of delivery.
- Items must be returned in their original, unused condition with all original packaging.
- A 10% restocking fee applies to cover processing costs.
- Return shipping costs are the responsibility of the customer.
To initiate a return, please contact us with your order number and the reason for your request.
Provenance
Everything we carry comes from the personal collection of Ken Schwartz — the sharpener behind Precise Sharpening, who built the Nubatama line and gathered the naturals that sat beside it on his bench. The synthetics are new and unused. The naturals were his.