Mitsui Seiki thread grinding machines offered by 2D CNC Machinery

The machine range covers a universal GSE-A series, the GSE-B, which uses cubic boron nitride (CBN) wheel technology, through to the ultra-precision GSC-H. In addition to the thread grinding range are grinding machines specifically for high precision rotor screws, the i–series for internal threads, ballscrew nuts and drum screws. There is also a laser screw lead measuring machine that utilises laser interferometry over measuring lengths up to 3,000 mm. The GSE-A universal series of thread grinding machines is available in two swing-over-table diameters of 270 mm and 480 mm, with between centre distances up to 5,400 mm. The GSE 30A accommodates small screw sizes with a maximum thread length of 300 mm and is suited to grinding miniature ballscrews, thread gauges and small worms. The mid-size GSE-A machines are suitable for grinding a wide range of parts, such as ballscrews, triangular threads, trapezoidal screw threads, worms, form rolling dies and large thread gauges. Meanwhile, the largest machines in the range the GSE 320A and GSE 500A, are for long screws up to 5,000 mm by 260 mm diameter, with the ability to maintain the same accuracy as mid-range machines. The hydrodynamic wheel bearing GSE-B series machines can carry CBN grinding wheels at running speeds up to 4,800 m/min - ideal for volume production of ballscrews – and have NC prismatic diamond rotary dressing. The swing is 480 mm and up to 3,650 mm between centres. Heavy duty, high speed grinding taking up to 2 mm depth-of-cut is possible on non-hardened or tempered stee,l and up to 1 mm depth-of-cut on hardened steel at a feed rate of 2,400 mm/min is possible with the 45 kW powered grinding wheel GSE 100 and 200-H series. The machines are used for grinding components, such as injection screws and large diameter heavy duty ballscrews. Meanwhile, the GSC 100-H has been developed for compressor screw rotor grinding up to 360 mm diameter up to 1,000 mm long. Special purpose applications involving internal threads, such as ballnuts up to 100 mm bore size by 180 mm long and 0.25 to 50 mm lead, can be ground on the GSNI80iS machine, with wheel speeds up to 70,000 rpm. The GSE 600i version can grind nuts having thread lengths up to 600 mm with internal diameters between 63 mm and 150 mm. The LMS 1500N and LMS 3000N laser screw lead measuring machines enable single lead, accumulative lead and segemented lead to be measured directly from the screw. As a result, any influence caused by screw run-out or sagging is avoided, and it is also able to measure the lead on a screw and nut assembly. Between centre distance is up to 3,500 mm, while the maximum screw size is up to 100 mm, with a lead between 2 and 32 mm.