America West Drilling Supply supplies drilling equipment to the well drilling, exploration drilling, construction drilling, and oil field drilling industries providing items such as: DTH hammers and bits, reverse circulation RC hammers and bits, whip socks, rotary bits, well pipe clamps, pipe wrenches, and overburden drilling systems.
A drilling rig is a machine that creates holes in the earth's subsurface. Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells, or they can be small enough to be moved manually by one person and such are called augers.
discount). For this you get 10 helicoil inserts so I guess at £7.35 per repaired hole it is not too bad. With the kit (incidentally now marketed as Armstrong Precision Components - Armacoil Thread Repair Kit, Helicoil to you and me) came a table of drill sizes which I list below.