Naniwa Dup 09 Ccd E 18 Hot _best_ May 2026

Product Profile: Naniwa Diamond Stone (DUP Series)

Model: D09 / E18 Reference Grit: #180 (Coarse)

Safety & Cleanup

  • Non-toxic in typical use but avoid ingestion and prolonged skin contact; wash hands after use.
  • Use in a ventilated area if using solvents to clean blades.
  • Remove excess from strops and pads periodically to avoid buildup; leather conditioners can be applied after cleaning.

The Drawbacks (And There Are Several)

  • Inconvenience: You cannot just splash water on this stone. You need a method to heat it consistently (a stone warmer or a temperature-controlled water bath).
  • Thermal Shock Risk: Rapidly heating or cooling a resinoid-bonded stone can cause cracking. Naniwa designed it to be stable, but user error has destroyed many units.
  • Poor Water Absorption: Because it’s designed for warm use, the stone does not absorb water well at room temperature. Using it cold results in a glazed, slippery surface that cuts poorly.
  • Availability: This model is discontinued or region-specific (common in Japanese domestic markets). Finding a new one is difficult, and used ones often have heat stress cracks.

2. 09 (The Grit Threshold)

The number "09" is the most critical variable. In Naniwa’s industrial coding system, "09" refers to a grit size of approximately #800 to #1000 (JIS standard). However, users report that the "09" formulation feels significantly finer—closer to a #1500 finish—due to the unique "CCD" breakage pattern. This makes it an ideal "mid-range" stone: aggressive enough to remove #400 scratches, yet fine enough to jump to a #6000 finishing stone. naniwa dup 09 ccd e 18 hot

4. Processing Challenges: Managing the "HOT" Factor

Molding with Naniwa DUP 09 CCD E 18 HOT is not for beginners. The high thermal stability means the material has a wide processing window, but it also presents risks: Product Profile: Naniwa Diamond Stone (DUP Series) Model:

  • Mold Temperature: Requires 90°C – 120°C to achieve proper crystallinity. Too low, and part warpage or poor surface finish occurs.
  • Drying is Non-Negotiable: Moisture causes hydrolytic degradation at hot runner temperatures. An undried batch will look like a foamy, brittle mess.
  • Screw Design: Use a general-purpose screw with a 3:1 compression ratio. Avoid excessive backpressure (max 10 bar) to prevent glass fiber breakage, which would reduce the "E 18" reinforcement benefit.
  • Hot Runner Systems: The "HOT" designation suggests compatibility with hot runner molds. However, ensure gate diameters are >2.5mm to avoid shear heating beyond 320°C, which would char the additive package.

6. The Cost and Lead Time Factor

Because "HOT" grades require specialty stabilizers (often copper iodide or proprietary organic salts), and "CCD" demands precise carbon nanotube or carbon black dispersion, this material sits in the mid-to-premium pricing tier. Non-toxic in typical use but avoid ingestion and

  • Estimated Price (as of 2025): $4.50 – $7.50 per kg, depending on volume. Standard PA66-GF30 without stabilization is ~$3.00/kg.
  • Lead Time: Non-stock item. Expect 6-10 weeks from a compounder. Keep a 500kg safety stock if this is a production-critical grade.

How to Flatten and Maintain the DUP 09 CCD E 18

Because this is an "E 18" (Extra Hard) stone, flattening it requires diamond plates. Do not use a SiC flattening stone (like a Norton Flattening Stone) as the hardness mismatch will cause the DUP 09 to tear chunks out of the SiC stone, glazing both.

  • Recommended Flattener: Atoma #140 or #400 diamond plate.
  • Frequency: Every 10-15 sharpening sessions (due to the hard binder, it wears slowly).
  • Storage: Store dry in a wooden box. Do not freeze. The "Hot" calcined binder is brittle; dropping it from waist height will shatter it like glass.

Typical datasheet expectations for this grade:

  • HDT (Heat Deflection Temperature): >240°C at 1.82 MPa. This allows the material to replace metals in hot environments.
  • Continuous Use Temperature (CUT): 140°C – 160°C, potentially peaking to 200°C for short durations.
  • Tensile Strength: 120–150 MPa (depending on glass fiber percentage).
  • Surface Resistivity: If "CCD" truly implies conductive dispersion, expect values < 10^6 Ohms/sq, making it suitable for ESD-safe applications.
  • Melt Temperature for Processing: 280°C – 310°C. Drying is mandatory (4 hours at 80°C) due to Nylon’s hygroscopic nature.