Vintage Lathe Live Center with Flip-Over Center/Pilot Drill Attachment – Patent 47774/68

Unusual vintage machinist lathe tooling identified through the stamped “PR PAT No 47774/68” marking. Patent research corresponds to British Patent GB1285707A, “Improvements in and relating to tools for lathes,” assigned to G. N. Drinkwater & Son Ltd. The patent describes a centering drill attachment mounted around a lathe live center with pivoting/spring-loaded arms.

The large center cone rotates freely and smoothly by hand. The small center/pilot drill is secured by an Allen/grub screw. The outside attachment incorporates the spring-loaded/pivoting mechanism shown in the photos.

Tapered shank measures approximately 31 mm at the large end and 26 mm near the small end over approximately 97.5 mm, consistent with an MT3/Morse Taper #3 profile. Please verify compatibility from the measurements and photos before purchase; taper size is not marked on the tool.

Additional approximate measurements: overall length 7"; center body maximum diameter 73.5 mm; main body diameter 59 mm; center cone approximately 47 mm long; cone diameter approximately 23.5 mm at location shown in measurement photo.

Vintage used condition with age-related finish wear, discoloration, oxidation/patina and marks from normal shop use. Tool has been lightly cleaned and oiled but not aggressively polished or restored. No manufacturer name was found on the tool itself. G.N. Drinkwater attribution is based on the patent number and corresponding patent documentation.

Please review all photos and measurements carefully for condition, configuration and compatibility. Sold as shown.

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