The Ministry of Supply has issued a new Control Order which became operative on the 16th August, 1943, known as: “The Control of Machine Tools (Twist Drills) (No. 1) Order, 1943,” which concerns all persons using High Speed Steel Twist Drills.
High-Speed Twist-Drill Control
Allocation Centre Established in Sheffield
Aircraft Engineering and Aerospace Technology ; 15 , 9 ; 274
1943-09-01
1 pages
Article (Journal)
Electronic Resource
English
Automatic hoisting control system and device for drill rod of twist drill coal mining machine
European Patent Office | 2022
|Proposed American standard for twist-drill sizes from .0156 in. to .5000 in.
Engineering Index Backfile | 1933
Chisel Edge Effect on Delamination when Drilling Thick Composite Materials with a Twist Drill
SAE Technical Papers | 2008
|