The new CoroBore 825 SL heads from tooling specialist Sandvik Coromant
(www.sandvik.coromant.com) are rotating axial face-grooving tools that offer a productive alternative to milling grooves for those operating — or serving — sectors such as pumps and valves, hydraulics and the pulp-and-paper industry.
The solution uses a standard SL32 blade and CoroCut 1-2 inserts, but it features a through-coolant capability for enhanced chip control. This, in combination with high levels of rigidity, allows increased cutting parameters. Chip evacuation is a concern in any metal-cutting operation, but it is critical when grooving because chips are more prone to being trapped inside a groove and being re-cut, so through-tool coolant delivered right to the cutting edge is particularly beneficial.
CoroBore 825 SL face-grooving heads offer radial fine adjustment for pre-setting purposes and are available for diameters from 47 to 1,275mm. For smaller diameters (47-150 mm), C6 and C8 adaptors are available; for larger diameters (>150 mm), a dedicated face grooving head with CoroBore XL can be used.
The first-choice insert geometries are CM for small nose radii (<0.2mm) and TF for larger nose radii (>0.2 mm); the recommended feed-rate starting value is 0.15mm/rev. However, if grooves with smaller width tolerances are required, GF geometry is the preferred choice. Here, a feed rate of around 0.10mm/rev is the recommended starting value.