The internal dial caliper gauges are especially used for measuring the deep inside diameter,such as ring groove bottom diameter and inside step diameter or special holes of the workpiece that hard to reach.
| Range | Grad. | A | B | L |
|---|---|---|---|---|
| 15-35mm | 0.01mm | 3mm | Ø3mm | 160mm/200mm |
| 35-55mm | 0.01mm | 13mm | Ø3mm | 160mm/250mm |
| 55-75mm | 0.01mm | 13mm | Ø3mm | 160mm/250mm |
