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The Dormer Pramet parting-off and grooving assortment as grown with the additions of a new insert, two new geometries, a grade, blades and tool holder. The new 0.98" GL double-edged insert is available in a variety of widths from 0.08" to 0.236". Targeting long-grooving applications, GL supports 60% capacity over the existing LCMF16 insert.
A PVD grade, G8330, has been introduced for the GL insert to provide a versatile and stable option when machining steel, stainless steel and cast iron.
The insert is also supported by two new geometries. PR is the first choice for medium to high feeds in a variety of machining conditions. Its cutting-edge strength resists cracking when grooving interrupted cuts and is ideal for the parting-off of bars.
The PM geometry is an option for low to medium feeds on soft materials, such as austenitic stainless steel, as it offers greater resistance to built-up edge and reduces the bur left when parting-off tubes.
A new range of external tool holders are available with shank dimensions from 0.63" to 0.98". Their advanced design supports stable cutting and resists vibration, promoting high-quality surface finish. The holders provide an overhang up to 1.26".
Designed for small part machining, the tools feature a 30-degree angled screw position for easier indexing and a brace to increase toughness.
In addition, a line of universal tool blades, offering heights between 1.02" to 1.26", are now available. It features a double-sided clamping key and a new design which enables inserts to be replaced with one hand.
Related Glossary Terms
- built-up edge ( BUE)
built-up edge ( BUE)
1. Permanently damaging a metal by heating to cause either incipient melting or intergranular oxidation. 2. In grinding, getting the workpiece hot enough to cause discoloration or to change the microstructure by tempering or hardening.
- bur
bur
Tool-condition problem characterized by the adhesion of small particles of workpiece material to the cutting edge during chip removal.
- grooving
grooving
Machining grooves and shallow channels. Example: grooving ball-bearing raceways. Typically performed by tools that are capable of light cuts at high feed rates. Imparts high-quality finish.
- physical vapor deposition ( PVD)
physical vapor deposition ( PVD)
Tool-coating process performed at low temperature (500° C), compared to chemical vapor deposition (1,000° C). Employs electric field to generate necessary heat for depositing coating on a tool’s surface. See CVD, chemical vapor deposition.
- shank
shank
Main body of a tool; the portion of a drill or similar end-held tool that fits into a collet, chuck or similar mounting device.
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