Gesswein Finishing Stones
The attached chart contains helpful information to guide you in selecting the appropriate polishing stone based on your application and surface type.
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EDM Blue
Hardness: Very Hard
Breakdown Ratio: Slow
Wet or Dry: Wet
Abrasive Grain: White Aluminum OxideRecommended Metals: Medium and Hard tool steels as high as
Rockwell C 62 -
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Oil-Treated
Hardness: Medium Hard
Breakdown Ratio: Moderate
Wet or Dry: Wet & Limited Dry
Abrasive Grain: White Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2, S7, and H13.
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Moldmaker
Hardness: Medium Soft
Breakdown Ratio: Fast
Wet or Dry: Wet
Abrasive Grain: Black Silicon CarbideRecommended Metals: Hard and soft tool steels as low as Rockwell C 25. Soft non-ferrous metals such as Aluminum, Beryllium and Kirksite.
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Diemaker
Hardness: Medium
Breakdown Ratio: Moderate
Wet or Dry: Wet & Limited Dry
Abrasive Grain: Brown Aluminum OxideRecommended Metals: All mold and tool steels of all hardness such as A2, D2, S7, H13, P20, 420SS, and soft non-ferrous metals such as Aluminum, Beryllium and Kirksite
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Ultra Soft
Hardness: Very Soft
Breakdown Ratio: Very Fast
Wet or Dry: Wet & Dry
Abrasive Grain: White Aluminum OxideRecommended Metals: Mold and tool steels including P20, 420SS, and soft non-ferrous metals such as Aluminum, Beryllium and Kirksite.
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EDM
Hardness: Hard
Breakdown Ratio: Slow
Wet or Dry: Wet
Abrasive Grain: White Aluminum OxideRecommended Metals: Medium and Hard tool steels as high as
Rockwell C 62
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Super Fine
Hardness: Medium
Breakdown Ratio: Moderate-Fast
Wet or Dry: Wet & Dry
Abrasive Grain: Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2, S7, and H13.
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RA
Hardness: Very Hard
Breakdown Ratio: Slow
Wet or Dry: Wet
Abrasive Grain: Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2, S7, and H13.
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G2
Hardness: Medium
Breakdown Ratio: Slow
Wet or Dry: Wet
Abrasive Grain: Brown Aluminum OxideRecommended Metals: Ideal for Steels such as P20, H13, and 420SS
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Moldmaker Plus
Hardness: Medium Hard
Breakdown Ratio: Moderate-Fast
Wet or Dry: Wet
Abrasive Grain: Green Silicon CarbideRecommended Metals: All mold and tool steels of all hardness such as A2, D2, S7, H13, P20, 420SS, and soft non-ferrous metals such as Aluminum, Beryllium and Kirksite.
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Premium White
Hardness: Medium Hard
Breakdown Ratio: Slow
Wet or Dry: Wet
Abrasive Grain: White Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2, S7, and H13.
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General Purpose
Hardness: Medium
Breakdown Ratio: Moderate
Wet or Dry: Wet
Abrasive Grain: White Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2 S7, and H13.
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Ruby Rough-Out
Hardness: Medium
Breakdown Ratio: Moderate
Wet or Dry: Wet & Dry
Abrasive Grain: Ruby Aluminum OxideRecommended Metals: All tool steels of all hardness such as A2, D2, M2, S7, and H13. Soft non-ferrous metals such as Aluminum, Beryllium and Kirksite.
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Rough-Out
Hardness: Very Soft
Breakdown Ratio: Fast
Wet or Dry: Wet & Dry
Abrasive Grain: Aluminum OxideRecommended Metals: Hard and soft tool steels as low as Rockwell C 25. Soft non-ferrous metals such as Aluminum, Beryllium and Kirksite.
