Wide range of ID measurements by combining extension rods with the micrometer head. The rod is accurately finished and incorporated in a pipe for shop-floor use.
Digimatic type (Series 337) is available.
Instrumental error :
+(13 + No. of rod + L/50) micron for Series 137
+(2 + No. of rod + L/50) micron for Series 337
L=maximum measuring length (fraction rounded
METRIC
| Range (mm) | Order No (w/o carbide) | Graduation (mm) | Head Stroke (mm) | Extension rods (Micrometer Unit) |
| 50-63 | 137-101 | 0.01 | 13 | --- |
| 50-150 | 137-201 | 3 rods (13,25,50 mm) | ||
| 50-300 | 137-202 | 5 rods (13,25,50,50,100 mm) | ||
| 50-500 | 137-203 | 6 rods (13,25,50,50,100,200 mm) | ||
| 50-1000 | 137-204 | 8 rods (13,25,50,50,100,200,200,300 mm) | ||
| 50-1500 | 137-205 | 10 rods (13,25,50,100,100,150,200, 200,300,300 mm) |