According to MAPAL, the company’s new EA-Performance-System sets a new benchmark in fine boring, bringing one-screw setting to the demanding 10 to 19 mm diameter range for the first time. The system reduces setting effort while maintaining high precision, surface quality and process reliability. 

Conventional fine-boring tools use two adjustment elements to set diameter and cutting-edge taper, making the process sensitive and dependent on operator expertise. MAPAL’s EasyAdjust-System, previously available from 20 mm diameter, simplifies this process with a single adjustment screw for diameter and a back taper permanently integrated into the cartridge system. 

MAPAL has now transferred this principle to the 10 to 19 mm range, using a new design configuration suitable for a broad spectrum of materials. The stable insert fixation required at these small diameters places high demands on system design, manufacturing precision and stability. MAPAL has addressed this by adapting the connection between the indexable insert and clamping system. 

At the heart of the EA-Performance-System is a newly developed indexable insert with defined contact geometry. Combined with a matching clamping jaw, this provides positive-locking, reproducible insert positioning. The clamping mechanism transfers the setting movement precisely while maintaining secure fixation under process load. 

The system enables micrometre-precise setting with simplified handling, helping to minimise correction effort and reject rates while supporting stable machining processes. This capability makes it suitable for applications including high-precision fit and bearing bores in transmission housings, cylinders, crankshafts and camshafts. 

MAPAL’s EA-Performance-System is already in use at selected customers, with ongoing production confirming stable setting behaviour and reproducible machining results. 

More information www.mapal.com

Sandvik Coromant says its new indexable milling concept combines stability, predictable performance and high metal removal rates across demanding materials and applications. CoroMill MR20 is a single-sided round-insert milling concept developed for secure, high-performance profiling and face milling. Optimised for ISO M, ISO S and ISO P materials, it is suited to pocketing and complex profiling in titanium and other HRSA materials. 

CoroMill MR20 also provides reliable roughing and semi-finishing in ISO P die and mould applications, while its high metal removal capability makes it suitable for pump and valve components in ISO M materials. 

“Our goal while developing CoroMill MR20 was to create a polyvalent cutter that offers the highest level of process security,” reveals Alvaro Ruiz, global product application specialist at Sandvik Coromant. “Customers machining high-value components need predictable, repeatable performance, and CoroMill MR20 delivers exactly that.” 

The cutter features an optimised insert seat with a large contact area between the insert and cutter body, minimising micro-movement for greater stability. An advanced cutter body design provides resistance to fatigue and deformation, while an integrated under-coolant system supports performance in long-chipping and difficult-to-machine materials. 

The six-edged insert has a thick, robust body for high bulk strength and edge-line security. Tight manufacturing tolerances promote gradual, predictable wear, supporting unmanned production, reduced scrap and high uptime. 

CoroMill MR20 can also contribute to more sustainable machining. Higher feed-per-tooth capability can reduce machining energy requirements, while long tool life means fewer inserts are consumed, reducing waste and associated carbon emissions. 

“Increasing feed capability while extending tool life means fewer resources used and less waste generated,” adds Ruiz. “It’s a win for productivity and for sustainability.” 

More information www.sandvik.coromant.com