Characteristics and characteristics of Granite Straight edge:
1. High hardness, good rigidity, strong wear resistance and high precision.
2. not affected by temperature, flatness retention is very good, do not worry about the change in temperature and affect the appearance of deformation and accuracy changes.
3. acid, alkali erosion resistance is extremely strong, will not rust, maintenance and maintenance is also very simple, long service life.
4. marble through long-term natural aging, precise structure, texture uniformity, expansion factor is very small, internal stress will not exist completely, will not deformation.
5. physical characteristics: specific gravity :2970~3070kg/㎡ compressive strength: 245-254n /m㎡ strong wear :1.27~ 1.47n /m㎡ linear expansion coefficient :4.6×10~6℃ water absorption :0.13% shore strength :HS70 above.
6.Granite Straight edge will not appear scratch, magnetic hair should not occur, the test can move smoothly back and forth, will not occur stagnation and movement is not flexible.
7. Granite Straight edge are provided with weight reduction holes for easy access in the process of use.
Application:
For in specting the straightness and flatness.
Pecification (mm) | Beeline tolerance of working surface (um) | Squareness between working surface | Tolerance of h.w.between a matched pair | |||
Precision grade (um) | ||||||
00 | 0 | 00 | 0 | 00 | 0 | |
160x25x16 | 1.5 | 3 | 20 | 40 | 1.5 | 3 |
250x40x25 | 2 | 4 | 30 | 60 | 2 | 4 |
400x63x40 | 4 | 8 | 40 | 80 | 4 | 8 |
630x100x63 | 6 | 12 | 50 | 100 | 6 | 12 |
POSITION: 
