Aluminium straight edges are widely used in industries where along with accuracy weight is also important factor. Light Weight Aluminum Straight Edge feature of these aluminium straight edge make them easy to use especially when using longer straight edge this is undoubtedly of great significance. These straight edge are made of aluminium section with steel strip reinforced on working surfaces for better working and durability. Each Luthra aluminium straight edges is provided with computerized calibration certificate traceable to NPL (Govt. Of India)
 |
Standard sizes and accuracy of light weight aluminium straight edge As per Grade 1:
| Size mm | Straightness um | Parallelism um |
| 1000 | 21 | 42 |
| 1500 | 29 | 58 |
| 2000 | 37 | 74 |
| 2500 | 46 | 92 |
| 3000 | 54 | 108 |
| 4000 | 71 | 142 |
| 5000 | 87 | 174 |