Formulas
| COVENTRY TOOLS BITS | CARBIDE BRAZED TURNING TOOLS | |||||||
| Co 10% | SPEZIAL | ASP-60 | P-20 | P-40 | K-10 | M-10 | ||
| MATERIAL MANUFACTURING | High speed steel 10% Cobalt alloy. First choice quality. | High-speed steel cobalt alloy, Tungsten and Carbon | High alloy ASP-60 powder metallurgical grade with a more even distribution of cobalt, tungsten and Carbide particles.. | Premium carbide imported from Germany and under ISO. | ||||
| APPLICATIONS | Turning, grooving and parting off. General purpose cutting tools. | High feed turning. Means cutting depths. | High wear resistance cutting edge. Turning and parting off. | Turning, grooving, threading. Generalmachining. | Turning, grooving, high feed ordificult conditions. | Turning, grooving, threading. Generalmachining. | Turning, grooving, threading. Generalmachining. | |
| MACHINING | Tough materials Wood Extrusion Shearing tools |
Tough materials Wood Extrusion Shearing tools |
Carbon steel, stainless steel,aluminium alloys, heat resistant alloys. | First choice grade for general turning steel. | Steel machining under difficult conditions. | Aleaciones de cobre a alta temperatura. Universal grade for cast iron,aluminium, abrasive materials and copper alloys. |
Turning stainless steels and wear resistants manganese steels. | |
| RESISTANCE | Allowed in difficult cutting conditions. |
High wear resistance and machining withhigh concentration of heat. | Alta resistencia al desgaste. Alta resistencia de la arista de corte. High wear resistance. High strength cutting edge. |
High wear resistance. | Allowed in difficult cutting conditions. |
High wear resistance. | High wear resistance. | |
| REGRINDING | Regrinding easily with ceramic or CBN wheels. | Regrinding easily with ceramic or CBN wheels. | Regrinding easily with ceramic or CBN wheels. | Silicon carbide Wheel, finish withdiamond wheel. | ||||
| SPECIAL FEATURES | Good results in wide materials range. |
Better wear resistance at cutting edge. |
Increased productivity by higher cutting conditions and increased wear resistance. |
Optimal performance in machining processes | ||||
| MATHEMATICAL DETERMINATION OF THE CUTTING SPECIFICATIONS FOR THREAD MILLING | ||
| Description | Formula | Definition |
| ONLY FOR MILLING | n = Spindle rotation speed vc = Cutting speed d = Milling cutter diameter D = Internal thread diameter vf = Feed rate at contour vfm = Feed rate at centre Ueint= Programmed immersion feed rate fz= Feed rate per tooth z = Milling cutter cutting rate |
|
| Milling external contour | Vfm = Vf = · (D + d) Vf = D · Vfm | |
| D (D+d) | ||
| Milling internal contour | Vfm = Vf = · (D - d) Vf = D · Vfm | |
| D (D-d) | ||
| Straight immersion | Ueint = 0,25 · Vfm | |
| Immerse in the circular arc | Ueint = Vfm | |
| Rth Calculation - Fórmula Rth | |||
| Symbol | Description | Metric | Formula |
| Rth | Roughness depth | mm | Rth = D/2 √ D2 - ae2/4 |