PURCHASING GAUGE BLOCKS CALLS FOR CONFIDENCE
Which Material Do I Need?
Steel
Steel gauge blocks have proven their reliability for more than a hundred years. This raw material remains the most commonly accepted for length standards. Steel gauge blocks provide high resistance to wear associated with a good property to adhere to other gauge blocks. However, steel must be protected against corrosion. Provided gauge blocks made from this material are properly handled, they will remain reliable for many years. TESA steel gauge blocks have the following key features:
–– Highly alloyed steel
–– Hardness guaranteed to 800 HV
–– Artificially aged for optimum form and dimensional stability
–– Coefficient of thermal expansion: (11,5 ± 1,0) x 10-6 K-1
Tungsten Carbide
Gauge blocks in tungsten carbide are 10 times as resistant to wear as steel gauges. They are intended for frequent use, also where superior wringing quality is required. TESA tungsten carbide gauge blocks
provide:
–– Hardness guaranteed to 1400 HV
–– Coefficient of thermal expansion: (4,23 ± 0,1) x 10-6 K-1
Ceramic
Ceramic gauge blocks are extremely resistant to wear and scratches. Due to the properties of this material, any minor damage is unlikely to affect the wringability of their measuring faces. Being corrosion
resistant, these gauge blocks are insensitive to "rusty hands", amongst other issues. Manufactured from stabilised zirconia, TESA ceramic gauge blocks have the following key features:
–– Non-magnetizable
–– Hardness guaranteed to 1400 HV
–– Coefficient of thermal expansion: (9,7 ± 0,8) x 10-6 K-1
Which Grade Do I Need?
Grade 2
These gauge blocks are commonly used as Working Standards in inspection rooms within a manufacturing area to set and calibrate measuring instruments and other equipment as well as to inspect
tools, fixtures and machines.
Grade 1
Gauge blocks of this class are mainly used as Working Standards to set and calibrate plug gauges andmeasuring instruments in measuring rooms or inspection areas within a manufacturing area.
Grade 0
These gauge blocks are designated for use as Company Standards in calibration laboratories or environmentally controlled inspection rooms to set and calibrate plug gauges as well as measuring
equipment.
Calibration grade K
Gauge blocks of this tolerance class are intended for use as Reference Standards in metrology oriented laboratories of National Institutes, precision measuring rooms and other laboratories of National
Calibration Services, whether officially accredited or not. They should be used as masters to calibrate gauge blocks, length standards of same accuracy and also measuring instruments
