Narex Vhu 2 1/8", Instruction Manual

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2
OPERATING INSTRUCTIONS
Vhu 21/8”, 31/8”, Vhu 47/8” and Vhu 6 ¼ ” Universal Boring Heads.
Utilisation
:
The Vhu 21/8”, 31/8”,Vhu 47/8” and Vhu 61/4” universal boring heads can be utilised for boring,
surfacing of front and rear facings, turning of external diameters, machining of external and internal
recesses and cutting threads. The Vhu 6 ¼ ” is same as Vhu 4 7/8” but slide here are with 5 holes
(not with 3 holes as for Vhu 4 7/8”).
By a combination of the automatic transverse feed motion of the tool slide with the motion of the
machine spindle it is possible to bore tapered holes, turn external tapers and cut tapered threads.
The taper angle depends in this case on the feed motion of the machine.
The universal boring heads widen considerably the machining possibilities of horizontal boring
machines, radial drilling machines and coordinate boring machines etc.
Examples of application
:
No. of Operation Example
operation
1. Hole boring Fig. No. 1
2. Surfacing on small diameter front facing Fig. No. 2
3. Surfacing on large diameter from facing Fig. No. 3
4. Recessing in bore Fig. No. 4
5. Recessing on surface Fig. No. 5
6. External turning Fig. No. 6
7. Recessing of long shoulder Fig. No. 7
8. Taper boring Fig. No. 8
9. Surfacing on rear facing Fig. No. 9
10. Thread cutting Fig. No. 10