| 摘要 |
PROBLEM TO BE SOLVED: To provide a tap holder for reliably executing vertical tapping, by facilitating rotation while horizontally keeping a handle, when an inexperienced operator taps a screw in the present invention, since an inclined screw is finally frequently threaded when the inexperienced operator executes this, since there is the necessity of learning skill by rearing sensibility by training when accurately executing this, since there is the necessity of horizontally rotating the handle while holding the screw verticality by inserting a tap into the tap holder when tapping the screw by manual work.SOLUTION: A small-sized round type bubble leveler is installed in a head part of a conventional T-shaped tap holder. The bubble leveler is formed in a removable structure. The T-shaped tap holder is provided by an above-mentioned constitution.SELECTED DRAWING: Figure 1 |
