42.2 mm (1.66") ID
89 mm (3.50") OD
The machining capacity of the GR90 is 42.2 mm (1.661“) ID to max. 89 mm (3.500“) OD. The PROTEM GR90 is specifically designed for boiler panels and waterwall cutout windows.
12.5 mm (0.49") ID
120 mm (4.72") OD
12.5 mm (0.49") ID
120 mm (4.72") OD
10 mm (0.39") ID
60.3 mm (2.37") OD
60.3 mm (2.37") ID
219.1 mm (8.63") OD
14 mm (0.55") ID
42 mm (1.65") OD