Made in Japan
Manufacturer: Niigata Seiki Co., Ltd
Model AA TYPE: AA-F50,AA-F75,AA-F100,AA-F125,AA-F150,AA-F200,AA-F250,AA-F300,AA-F400,AA-F500,AA-F600,AA-F750,AA-F1000,AA-F1500,AA-F2000,AA-S50,AA-S75,AA-S100,AA-S125,AA-S150,AA-S200,AA-S250,AA-S300,AA-S400,AA-S500,AA-S600,AA-S750,AA-S1000,AA-S1500,AA-S2000

FIRST GRADE(Hardened)

Use

Measurement of squareness

Material

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

Features OF AA 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)

Features OF AA 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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