ISO 50 tapers are machine tools that function with the cutting spindle of a machine. The ISO 50 is the largest of three tapers, with the ISO 30 as the smallest followed by the ISO 40. According to the National Machine Tool Builders' Association, an ISO 50 taper may be classified as a Quick Change, NMTB, National Standard, MM or an American Standard Machine Taper. In addition, ISO 50 tapers are interchangeable with American National Standards Institute (ANSI) units.
The maximum diameter (D) of the outside of a Taper ISO-50 is 69.85 mm. The opposite end or inside diameter (D1) measures 39.6 mm and the collar diameter is 101.6 mm.
ISO DIN 2080
The ISO DIN 2080 without coolant, consists of an ISO 50 taper and an M-24 draw bolt thread of 26 mm. The ISO DIN 2080 has a length of 126.8 mm. It is used on side lock adapters for straight shank tools, mill adaptors, tenon drivers, drill adaptors and shank drill chucks.
ISO 50 tapers are required on machines such as the Universal Milling Machine LM1450A, a Knee Type Milling Machine HX5036A, a Vertical Milling Machine X5032A, a Universal Knee Type Milling Machine XW6032B and a Radial Universal Machine XL6336.
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