A new universal cylindrical grinding machine from Swiss specialist Kellenberger majors on providing high value at the entry level, while offering reliability, precision and high productivity via its state-of-the-art intuitive programming function.

Available in the UK from Jones & Shipman Hardinge, the Kellenberger 10 (K10) combines proven technology using many Kellenberger components and sub-assemblies from the established K100 machine, coupled with the latest programming technology. For instance, Kellenberger Blue teach/programming software enables semi-skilled operators to use the machine, thereby optimising use of the work team. Kellenberger Blue solution software is accessed through a FANUC 0i-TFP CNC control with a 19” touch screen.
In standard format, the machine can accommodate workpieces up to 1000 x 400 mm in size with a top table weight capacity of 100 kg. The table profile is also a proven Kellenberger design with the full length wheel dressing interface located on its rear to reduce re-tooling work and extend wheel dressing possibilities.
K10 models feature generous X and Z-axis strokes (365 mm in X, 1150 mm in Z), collision-free operation and dressing ratios. The low-maintenance, high-precision linear guide on the X axis and the flat sliding V guides on the Z axis are equipped with optical absolute linear position measuring systems. Furthermore, the B axis is designed as an automatic indexing axis (1° Hirth gearing) with high positioning accuracy and a +30°/-210° swivel range.
The K10 also offers the ability for users to expand or customise its capability by adding a range of optional equipment such as a second external grinding wheel, larger grinding wheels, a tailstock, gap control and balance sensors, and measurement control via probing.
For further information www.hardinge.com

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, thanks to 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 250 x 500 mm table – and the larger X36 with 300 x 600 table – feature 550 mm and 600 mm clearance between table and spindle centreline respectively. Both variants are based on a construction that was developed through FEA for added stiffness and support. Spindles are also high-performance P4 units with 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’s product manager - grinding products, says: “With the addition of full CNC control from Siemens, the X series provides, as standard, cycles to cover surface, crisscross, plunge and pitch [same pitch and same depth] grinding. However, customers can now specify optional cycles such as stair, side, profile and contour grinding, giving them much greater control over their operations.” 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, three-piece dressing diamond is standard and, to accommodate the variety of additional grinding cycles, rotary and roller dressing devices can be offered for wheel forming options. For further information www.rk-int.com