The hardened face tubular inside micrometer is an extension rod type that offers interchangeable extensions with cylindrical gage rods that are spring-mounted in protective sleeves so the measuring range can be extended. It has a measuring range of 2 to 40".
The hardened face tubular inside micrometer is an extension rod type that offers interchangeable extensions with cylindrical gage rods that are spring-mounted in protective sleeves so the measuring range can be extended. It has a measuring range of 2 to 40".
| Range | 2 to 40" | 
| Mass | 845 g | 
| Accuracy | ±: [0,00015+0,00005n+0,00005(L/2)]", n = Number of rod, L = Maximum measuring length (inch) | 
| Measuring Surfaces | Hardened steel | 
| Measuring Spindle | Spindle pitch 0,635 mm | 
| Measuring Span | 13 mm or 0.5" | 
| Extension | θ12,5 mm | 
| Graduation | 0.01 mm | 
| Digital/Analog | Analog | 
| Inch-Metric | Inch |