Good Standard Granite Straight Edge
Fot inspecting the straightness and flatness.black granite straight edge
Granite straightedges purpose:Measurement the workpiece of straightness and flatness and equipment installation,workface of the machine tools ,guide and the straightness and flatness of work precision.The material is the Jinan Black Granite,the granite straightedges is black shine,compact structure,uniform texture,good stability,high strengh and hardness,the granite straightedges of precision standard tools is made by natural stone,it's good standard to the instrument,precision tools,inspection of machine parts,especially use in measurement of high precision.
the granite straightedges character and advantage:
1.The rock through natural time,uniform texture,swell factor is so small,Internal stress disappear completely,no change shape,so it's high precision
2.Good rigidity,high hardness,strong wear resistance.
3.no Afraid of acid and alkaline liquid material erosion, and will not rust, do not need oiling, no easy to stick dust, maintenance, easy maintenance, long service life.
4.No scratches, no be prevented by constant temperature,it can keep precision measurement in constant temperature.
5.no magnetization ,can move when measuring,no dull sense,no wet influence,good flatness.
Welcome your inquiry for special specifications.
Precision:according to the national standards measurement examination regulations execution:
| straightness&flatness of working surface | parallelism between Working surfaces |
TYPE |
(mm) |
| precision grade(um) |
| 00 | 0 | 00 | 0 |
500x100x40 | 1.6 | 2.6 | 2.4 | 3.9 |
750x100x40 | 2.1 | 3.5 | 3.2 | 5.3 |
1000x120x60 | 3.0 | 5.0 | 4.5 | 7.5 |
1500x150x60 | 4.4 | 7.4 | 6.6 | 11.1 |
2000x200x80 | 5.4 | 10 | 8.1 | 13.5 |
3000x200x80 | 8 | 16 | 12 | 24 |