Gage Block

ceramic gage block	tungsten carbide의 3배 이상의 수명을 갖는다. 인성이 커서 파손의 염려가 적다. 열팽창계수(9.5*10-6/oC)가 낮아 손의 온도에 의한 영향이 곧바로 나타나지 않는다. 내부식성이 크다. tungsten carbide에 비하여 가볍다.
tungsten carbide gage block	강제품 보다 수명이 길다. 열팽창계수(4.23*10-6/oC)가 낮아 손의 온도에 의한 영향이 곧바로 나타나지 않는다. 열전도도가 크다. 내부식성이 크다. A set of metric gauge blocks. Sizes are listed under each block. eg:- a pair of 2mm thick wear blocks at the lower left corner.
Gauge blocks (also known as gauge blocks, Johansson gauges, slip gauges, Jo blocks, block gauges) are precision ground and lapped measuring standards. Rectangular, square, wear, scribing and angle gage blocks are available in hardened steel, carbide and ceramic materials. They are used as references for the setting of measuring equipment such as micrometers, sine bars, dial indicators (when used in an inspection role). They are available in various grades depending on their intended use. reference (AAA) - high tolerance (± 0.00005 mm or 0.000002 in) used to establish standards calibration (AA) - (tolerance +0.00010 mm to -0.00005 mm) used to calibrate inspection blocks and very high precision gauging inspection (A) - (tolerance +0.00015 mm to -0.00005 mm) used as toolroom standards for setting other gauging tools workshop (B) - low tolerance (tolerance +0.00025 mm to -0.00015 mm) used as shop standards for precision measurement