Perfect X-Series surface grinders add control to contour grinding

The two-machine X-Series of two- and three-axis surface grinders from Taiwan-based Perfect has long been a part of RK International Machine Tools’ portfolio of precision grinding machines. Now, with the addition of full CNC, in the form of the Siemens 828D control these machines have gained even greater versatility, with the three-axis versions now able to perform full contour grinding as standard.

The X25 with its 250mm x 500 mm table and the larger X36 with a 300 mm x 600 table, with 550 mm and 600 mm clearance between table and spindle centreline respectively. The X-Series provides high accuracy surface grinding at competitive pricing, with both variants featuring a construction developed through finite element analysis for added stiffness and support. Spindles are also high-performance P4 units with high-precision angular contact bearings delivering runout of < 2 μm. The spindle itself features an inverter giving users a choice of spindle speed to suit specific materials.

Craig Digweed, RK International Machine Tools’ Product Manager – Grinding Products, comments: “With the addition of full CNC control from Siemens, the X-Series provides, as standard grinding cycles to cover surface, criss-cross, plunge, and pitch [same pitch and same depth]. However, customers can now specify optional cycles such as stair, side, profile, and contour grinding giving them much greater control over their grinding operations.”

Standard features of the X-Series machines are the use of servo motors on the cross, vertical and X-axes (three axis variant only), along with linear guideways on the cross and vertical axes and box ways on the X-axis (two axis variant) and linear guideways for the three axis machines.  Table speed ranges from 1 to 25 m/min, dependant on machine specification with a cross feed of 1100 mm/min on all machines. A table mounted, 3 piece dressing diamond is standard, and to accommodate the variety of additional grinding cycles, rotary and roller dressing devices are also available for wheel forming options.