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Of conventional design the Hendey taper-turning attachment was beautifully constructed and arranged so as to be ready for instant use. The following instructions are exactly as published by Hendey in the late 1920s, but apply equally well to both earlier and later lathes.
The frequent omission of (the) definite article throughout (the) passage makes it appear more impenetrable than it really is but, in comparison with modern hand-holding linguistic techniques, it does perhaps leave a little to be desired:) p
The essential parts of this attachment are indicated by the following numbers: -
1. Brackets of main casting.
2. Taper attachment slide.
3. Swivel bar
4. Knurled grip nut for rack and pinion adjustment of swivel bar.
5. Binding bolts for swivel bar.
6. Cover plates for bolt slots.
7. Connecting link between slide block and cross slide.
8. Binding handle for stud, connecting slide block with cross slide link and cross-feed screw extension block.
9. Slide block on swivel bar connecting with cross slide.
10. Thread-stop rod, used when cutting taper threads.
11. Attachment Slide connecting screw.
12. Knurled check nuts for connecting screw.
13. Connecting screw bed clamp.
14. Binding screw for cross-feed screw extension block.
15. Binding bolt for carriage
The main bracket is securely attached to back of lathe carriage, after both are finished to a bearing surface to prevent any wind in attachment when bolted to position. It is also accurately levelled with top of lathe ways to insure free movement the full length of slide.
As the attachment travels with carriage, it is always in position ready for use. All operations necessary to use the attachment are made from front of carriage. They consist first, in setting swivel bar at any desired degree by means of rack and pinion adjustment at No. 4, binding the connecting screw bed clamp to back V of lathe, loosening binding screw No. 11 at end of wing of carriage, which releases the cross-feed screw connecting block and then clamping the connecting link to slide block by means of binding handle No. 7. The connecting link, and binding handle stud which is fitted to reamed hole in head of extension block, furnish a double connection and one that is absolutely rigid between the cross slide of carriage and slide block of attachment preventing any back lash when slide block is properly gibbed up.
The attachment is graduated at both ends, one in degrees, the other in inches per foot, giving an included angle of 15 degrees, or approximately 3 inches in diameter per foot.
Maximum travel:
12" Lathe = 13" 14" Lathe = 14" 16" Lathe = 18" 18" Lathe = 18" 20" Lathe = 20" 24" Lathe = 24" ..
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