21mm Diameter, Thickness/ Hole Gauge, Contact Reticle

Product Description

A series of parallel lines 0.001" to 0.008" apart measure thickness.
10mm metric scale is divided into units of 0.2mm.
0.5" decimals-inch scale divided into units of 0.005".
Hole Diameter scales read in fractions of 1/64" to 1/16" and decimal scale from 0.005" to 0.05".

產品系列說明

• Greater Stability than Film Reticles
• Low Reflection Chrome Pattern
• English or Metric Styles

低反射鉻膜型號提供高對比度。相較於容易彎曲變形的膠片式分劃板，本玻璃分劃板更耐用。尺規位於分劃板的外部，直接接觸被測物體，可提供最佳調焦和精確測量。確定放大鏡的視場，然後再選擇分劃板。例如，對於12倍放大鏡的5⁄8”(16mm)視場來說，¾”(20mm)的尺規是不夠的。可使用紙巾及鏡片清潔劑來清洗分劃板。