PDT (Poltava) Premium Silver Diamond vitrified-metal bonded

The PDT Premium Silver Diamond Stone is a high-performance sharpening solution engineered for maximum metal removal and consistent performance on a wide range of steels, including high-alloy and hard compositions. Using the same advanced vitrified-metal bond as the Silver CBN series, this diamond version delivers even faster cutting action while maintaining excellent durability and stability.

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Key Features

• High-Concentration Diamond Abrasive — Provides extremely fast cutting speed, making metal removal 10–15% faster compared to CBN stones.

• Vitrified-Metal Bond — Ensures aggressive performance, flatness retention, and a long operational lifespan.

• Ideal for High-Productivity Sharpening — The best option for users who value speed, efficiency, and high throughput.

• Dry or Wet Use — Performs effectively with or without lubrication.

• Optimized for a Wide Range of Steels — Suitable for hard steels (60+ HRC), stainless alloys, and high-carbide tool steels.

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Diamond vs. CBN

If maximum productivity is your priority, Diamond stones are the superior option, offering noticeably faster metal removal.

• Diamond → Faster (10–15%), more aggressive

• CBN → Cleaner scratch pattern, smoother finish

Additionally, the price of the Silver Diamond series has become more accessible, making it an excellent performance-to-value choice.

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Specifications

• Length: 6” (150 mm)

• Width: 1” (25 mm)

• Abrasive Layer: 1/8” (3 mm)

• Aluminum Blank Thickness: 4 mm

• Total Thickness: 7 mm

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Hapstone is the official distributor of PDT sharpening stones.

Care:

The stone is designed for manual sharpening of knives, hazard razor blades, chisels, etc. The stone is restored by salting with pumice or silicon carbide powder on a flat surface.