CBN/PCD inserts for fine and rough boring tools
Application advice
Polycrystalline cubic boron nitride CBN CBN cutting materials are substantially harder than sintered carbide and exceptionally heat-resistant. Depending on the design (with or without land on the cutting edge) they are specially suitable for boring hardened steel types (52-65 HRC), hard cast steel, cast iron and hard nickel alloys. Polycrystalline diamond PCD PCD cutting edges are extremely hard and abrasion-resistant. They permit the high-speed finish-machining of non-ferrous and nonmetallic materials.
Workpiece / Cutting speed
Workpiece material / Cutting speed Vc (m/min)
CBN-10
GG 10 - GG 35 1)
CBN-15
CBN-10
GGG 40 - GGG 70 2)
CBN-15
CBN-25
Steel ≥ 52 HRC 3)
CBN-30
CBN-10
NiCo Alloys / Ti 2)
CBN-15
PKD / PCD
Al 2) / Non ferrous metals 3)
PKD / PCD
Carbon Fiber 3)
0
200
400
600
800
1000
1200
1400
1600
1800
Vc for continuous cut
Vc for interrupted cut
Coolant 1) Dry- or wet boring possible 2) Wet boring recommended 3) Dry boring recommended
Cutting aluminium with PCD In most cases the max cutting speed is not determined by the relation of cutting material / workpiece material but by restrictions of the rotating speed, the tool length or the chip control.
Feed / Stock allowance
Feed [mm/rev] and stock allowance in relation to the insert nose radius and the diameter - length ratio of the tool. Limiting values depend on the machine tool and have to be determined by tests.
Insert nose radius [mm] 0.8
0.4
0.3
0.2
0.1
0.06 0.04 0.02 0.10 0.08 0.12 0.14
0.1
0.15
0.2
0.25
Steel Carbidge
≤ 1:2 ≤ 1:3
≤ 1:3 ≤ 1:3.5
≤ 1:3 ≤ 1:4
≤ 1:35 ≤ 1:5
≤ 1:3.5 ≤ 1:7
Diameter - lenght ratio of tool holder / boring bar
142
Powered by FlippingBook