Made in Japan
Manufacturer: Niigata Seiki Co., Ltd
Model DD TYPE: ,DD-F50,DD-F75,DD-F100,DD-F125,DD-F150,DD-F200,DD-F250,DD-F300,DD-F400,DD-F500,DD-F600,DD-F750,DD-F1000,DD-F1500,DD-S50,DD-S75,DD-S100,DD-S125,DD-S150,DD-S200,DD-S250,DD-S300,DD-S400,DD-S500,DD-S600,DD-S750,DD-S750,DD-S1000,DD-S1500

FIRST GRADE(Hardened)

Use

• Measurement of squareness

Material

• Carbon steel for machine structural use（hardened measuring face）
• Hardness: over HV450

Features OF DD TYPE

• Dimension and accuracy equivalent to JIS B 7526（※exceeds JIS）
• Hardened measuring face for abrasion resistance
• All hardened, first grade squares are provided with inspection report

Squareness±（10＋ L/20 ）μm（L: Nominal Size）

SECOND GRADE (Non-Hardened)
FIRST GRADE(Hardened)

Features OF DD TYPE

• Dimension and accuracy equivalent to JIS B 7526 （※exceeds JIS）
• Non-hardened・Ground finish

Squareness±（20＋ L/10 ）μm（L: Nominal Size）

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