Dormer Pramet Positive geometries, grades for demanding turning applications
UK – Dormer Pramet has introduced two positive geometries and grades for applications in difficult to machine materials, such as high temperature alloys and stainless steel, which it says are suitable for various turning applications.
The SF geometry has a sharp, positive rake of 14.5° and is for finishing applications in continuous cut with very low forces. The wear-resistant, universal SM geometry has a positive rake of 13° is for medium machining (finishing up to roughing), suitable for continuous and interrupted cut. Both are available in various grades and are said to promote low cutting forces and prevent work-hardening. This helps to reduce the risk of vibration when turning thin-walled components.
The company has also launched two new turning grades. According to Pramet, its PVD coated T6310 grade features a special sintering process that enhances cutting edge reliability and strength. Its new substrate with an intermediate cobalt content, is designed to provide additional hardness and increased abrasion resistance and thus offer greater reliability and extended tool life. The company says the T6310’s triple coating provides durability at the higher cutting speeds used when machining stainless steel, heat-treated and hardened materials. It is suitable for use with the NF, RM, SM and SF geometries. A total of 89 inserts are now available.
Pramet’s new H07 uncoated grade, which is available in the new SF geometry, is noted to offer good heat conductivity and high wear resistance required for turning titanium and alloys. Its fine grain substrate with low cobalt content offers resistance to pitting and plastic deformation.