Roughness Comparison Specimens
Article No. 13132
Roughness Comparison, Type 130
- Comparison Standards Type 130
- Consists of 30 comparison specimens, covering six commonly-used machining methods (6 turned, 6 end-milled, 6 horizontally milled, 6 surface-ground, 3 lapped, 3 reamed/drilled. A label gives the Ra and Rz values of each specimen in both metric and imperial units.
- Great for checking the roughness of spark-eroded surfaces as described in the VDI 3400 Guideline, the roughness of steel surfaces which have been prepared for painting by blast-cleaning, as outlined in ISO 8503 and estimating the surface roughness prior to accurate measurement by a stylus instrument, as recommended in BS EN ISO 4288, eg.
- Can by used to check the seriousness of damage to parts caused by nicks, dents and scratches and reconditioned ship propeller blades
- Made from 100% Nickel
Features
The Roughness Comparison Specimens are simple to use, inexpensive, and therefore widely used in many different applications. They are great for checking roughness of turned, milled, ground, reamed, polished or lapped parts during machining.
The measurement of surface roughness is not as straight forward as most other engineering measurements, such as length, angle or hardness; and in order to get good accuracy, expensive instruments are needed. These are often unsuitable for workshop use, where roughness of machined surfaces can usually be assessed conveniently and with sufficient reliability using visual and tactile (fingernail) comparison with a standard set of surfaces machined in the same way.
Standards
BS EN ISO 4288
ISO 8503
Procedure
Compare roughness of substrate to Surface Roughness Specimen Set by visual and tactile (fingernail) comparison.
Delivery Content
Surface Roughness Standards Composite Set - Includes Surface Roughness Standards and Certificate of Conformance
Other Variations