Narex Vhu 2 1/8", Instruction Manual

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Also taper threads can be cut with the Vhu 21/8”, 31/8”, Vhu 47/8” and Vhu 6 ¼ ” boring heads.
The axial feed for the lead of the thread is effected by the machine spindle and the transverse
motion of the tool slide effects the thread cutting. Both feeds must be permanently engaged
during thread cutting. The transverse feed of the tool slide will be calculated by means of the
following formula:
Transverse feed of the tool slide in in/rev. = (lead of the thread in in) / (cotg α/2)
The tool clamping and setting to the required diameter is the same as in the case of taper
boring.
Lubrication
:
The internal mechanism of the boring heads is lubricated by means of a grease gun and two
nipples (13). The design of the Vhu universal boring heads is protected by the Czech Patent
No. 105957.
V. Tools
Vhu 6 ¼ “
Vhu 6 ¼ “
Vhu 6 ¼ “
Vhu 6 ¼ “