Specifications

• Model No: 5280601 (528‑101)

• Type: Precision Knife‑edge Straight Edge

• Length: 75 mm

• Edge Style: Single knife‑edge (straight)

• Material: High‑carbon high‑chromium steel (hardened & tempered)

• Hardness: HRC 60–64

• Straightness Accuracy: ≤ 1 μm (full length)

• Surface Roughness: Ra ≤ 0.05 μm

• Application: Straightness checking, edge alignment, tool setup

• Protection: Rust‑resistant coating, oil‑proof finish

• Mass: Approx. 120 g

• Compliance: JIS B 7514, CE, RoHS

• Origin: Made in Japan

Features

1. Ultra‑precision straightness: Guaranteed ≤1 μm accuracy for reliable flatness/straightness verification.

2. Hardened steel body: Excellent wear resistance and long‑term stability.

3. Sharp knife‑edge: Enables precise contact measurement on narrow edges and fine surfaces.

4. Rigid & lightweight: Easy to handle and place on workpieces.

5. Corrosion resistance: Special coating prevents rust in workshop environments.

6. Traceable calibration: Meets national metrology standards for quality assurance。