1950s Sheffield Twist Drill & Steel Co Ltd Dormer Handbook Sheffield Handbook

Description: An original circa 1950s technical handbook published by The Sheffield Twist Drill & Steel Company Limited, located on Summerfield Street, Sheffield 11, England. This 80-page "Dormer Information Handbook" (Edition 457) serves as a comprehensive guide for engineers and machinists, featuring detailed twist drill and reamer nomenclature in accordance with British Standards B.S. 328: 1950 and B.S. 122: 1952. The manual provides technical data on specialized tools, including quick helix drills for aluminum and slow helix drills for brass, alongside practical advice on drilling speeds, feeds, and the use of cutting oils. This particular copy bears the ownership stamp of "The Tool Specialist" Bryce and Engineering Supplies Ltd. of Great Victoria Street, Belfast, and a handwritten name, W. K. Penny.

Background Information: The Sheffield Twist Drill & Steel Company was the manufacturer behind the world-renowned "Dormer" brand, operating from a modern multi-storeyed factory in Sheffield, the heart of the British steel industry. During the mid-20th century, Dormer became an industry leader by combining extensive scientific research with high-precision engineering to produce drills, reamers, and milling cutters. These handbooks were essential shop-floor references during Britain's post-war industrial era, ensuring that machinists could maximize the life and performance of their high-speed steel tools across various materials, from Bakelite and plastics to high-tensile alloys.

Condition Report: The handbook is in good vintage condition with a striking red, yellow, and blue cover. The "shiny" surface layer is showing signs of age-related delamination, particularly along the top and bottom edges where the clear film is beginning to lift from the card. Internally, the 80 pages are clean and well-preserved, featuring sharp technical diagrams and clear typography. The binding remains secure, and there is a distributor's stamp on the inside front cover. See Photos for Condition

Shipping Information: Carefully packaged in a protective sleeve to ensure safe delivery. Shipped securely in a rigid mailer to prevent bending or damage during transit.

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