To produce sheet metal templates such as was shown in [Fig. 279], the following method may be employed, it being assumed that we have a threading tool correctly formed.
Fig. 288.
Fig. 289.
Fig. 290.
To produce sheet metal templates such as was shown in [Fig. 279], the following method may be employed, it being assumed that we have a threading tool correctly formed.
Fig. 288.
Fig. 289.
Fig. 290.