The AVT 412 tapping machine features CNC-machined aircraft-grade aluminum alloy components that provide strength with reduced weight, as well as corrosion-resistant side shafts that are graduated for easy reference. The hard chrome plated 2-in.-diameter (50.8-mm) drive shaft improves durability and resists corrosion. A manual-feed hand wheel is independent of rotation, giving the operator fingertip control. All seals, bearings and O-rings are standard size for ease of replacement. The tapping machine has a drilling capacity of 4-in. to 20-in. (101.6-mm to 508-mm). Models are available in 25-in. and 36-in. (635-mm and 914.4-mm) lengths. The AVT 412 tapping machine is rated to 500 psi (34.4 bar).