| ■      Tungsten Rod(Bar) ◇     Application Tungsten rod(bar) is for the application if emission  cathode,high-temperature forming rod,support wire,lead-in wire,printer  pin,various delectrodes and heating devices of quartz furnace,etc. ◇     Specification :mm 
                                            
                                              
                                                | Surface Sizes | Swaged | As-Drawn | Cleaned& Straightened | Ground | Length Tolerance |  
                                                | Diameter Tolerance | Ovality | Diameter Tolerance | Ovality | Diameter Tolerance | Ovality | Diameter Tolerance | Ovality |  
                                                | 0.2≤d<0.5 | - | - | ±0.01 | 0.01 | ±0.01 | 0.01 | - | - | L<100±1.0 100≤L<300±1.5 300≤L<500±2.0 500≤L<1000±2.5 1000≤L<2000±5.0 |  
                                                | 0.5≤d<0.8 | - | - | ±0.02 | 0.02 | ±0.02 | 0.02 | ±0.01 | 0.01 |  
                                                | 0.8≤d<1.0 | - | - | ±0.02 | 0.02 | ±0.02 | 0.02 | ±0.02 | 0.02 |  
                                                | 1.0≤d<1.8 | - | - | ±0.03 | 0.03 | ±0.03 | 0.03 | ±0.02 | 0.02 |  
                                                | 1.8≤d<3.5 | - | - | ±0.05 | 0.05 | ±0.05 | 0.05 | ±0.03 | 0.03 |  
                                                | 3.5≤d<5.0 | ±0.1 | - | - | - | - | - | ±0.05 | 0.05 |  
                                                | 5.0≤d<9.0 | ±0.2 | - | - | - | - | - | ±0.08 | 0.08 |  
                                                | 9.0≤d<13.0 | ±0.3 | - | - | - | - | - | ±0.10 | 0.10 |  
                                                | 13.0≤d<17.0 | ±0.4 | - | - | - | - | - | - | - |  Note:Tungsten rod(bar),at or thicker than 17mm,or thinner than 0.2mm may be as agreed between supplier and purchaser. |