Surface roughness comparison block

The measurement of surface roughness is not as straight forward as most other engineering measurements such as length or angle or hardness' and in order to get good accuracy, expensive instrument are required. These are often unsuitable for workshop use, where roughness of machined surface can usually be assessed conveniently and with sufficient reliability using visual and tactile comparison with a standard set of surface machined in the same way.

There problem are solved by this range of Surface Roughness Comparison Specimens, they are inexpensive and simple to use, widely used in many different applications.

 APPLICATIONS:

Checking roughness of turned, milled, ground, polished or lapped parts during maching;

Checking the roughness of spark-eroded surface as described in the VDI 3400 Guideline;

Checking the roughness of steel surface which have been prepared for painting by blast-cleaning, as outlined in ISO8503

If you encounter any problems during the test, we promise to give you an answer within 48 hours, and provide solutions within 3 working days.

Cangzhou Zhongjian Precision Instrument Co.,Ltd, was founded in 2001 in Hebei province, China, mainly produce and engage in concrete test instruments, cement instruments, asphalt instrument, soil instrument, aggregate instrument and compression test machine and other construction test instruments. We have the capability to produce customized instrument according to the requirement of our customer, and we can supply the whole set of test instruments at competitive price, our product have ASTM and ISO standard certificate, until now we already developed and produced more than 300 kinds of construction test instruments by ourselves and with our own knowhow. We have ample stock and deliver in time and quickly to destination around the world. Good quality after-sale service and sufficient accessory parts are our basic advantages in this field. Expect to cooperate with you faithfully.