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CoroBore® 825

Fine boring tools for high-precision boring

Application test: Fine boring with C5-R825C-FAE-277 (825D-70TC11-C5M)

Machine:MORI SEIKI NT4200 DCG
Spindle interface: Coromant Capto® C6
Max spindle effect 10 min (continuous): 18.5 (11) kW (25 (15) hp)
Max spindle torque 10% ED (continuous): 120 (44) Nm (80 (32) ft·lb)
Tool assembly:825D-70TC11-C5M, diameter range 55–70 mm (2.165–2.756 inch)
Basic holder:C6-391.02-50 080
LF/LU:380 mm (14.96 inch) / 350 mm (13.78 inch)
Cartridge:R825C-AF23STUC1103A, KAPR 92°
Insert:TCGX 110304L-WK 1515
Work piece material:EN 34CrNIMo6 (AISI 4340); MC: P2.1.Z.AN, HB: 290

Result: excellent surface finish

Insert:TCGX 110304L-WK 1515
Boring tool preset diameter, DCmm (inch)64.4 (2.535)
Measured bore diameter, DCmm (inch)64.3 (2.531)
Predrilled bore diameter, Dpmm (inch)63.6 (2.504)
Chip thickness, hexmm (inch)0.15 (0.006)
Cutting speed, vcm/min (ft/min)100 (328)200 (656)300 (984)400 (1312)500 (1640)600 (1968)
Feed per rev, fnmm (inch)0.15 (0.006)
Spindle speed, nrpm4949891 4831 9772 4712 966
Penetration rate, vfmm/min (in/min)74 (2.913)148 (5.827)223 (8.780)297 (11.693)371 (14.606)445 (17.520)
Intended radial depth of cut, apmm (inch)0.400 (0.016)
Actual radial depth of cut, apmm (inch)0.350 (0.014)
Surface roughness, Rzµm (µin)4.43 (174)4.75 (187)4.55 (179)4.41 (174)4.44 (175)3.99 (157)
Surface roughness, Rqµm (µin)1.01 (40)1.11 (44)1.12 (44)1.02 (40)0.97 (38)1.01 (40)
Surface roughness, Raµm (µin)0.85 (33)0.94 (37)0.94 (37)0.86 (34)0.80 (32)0.89 (35)
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