Boring Examples

Example 1

Component	Engine block
Material	Aluminium
Tool	Tuned boring bar with a Varilock holder
Total tool overhang	9 x D
Cutting tool	Insert cartridges with inserts with AI geometry, grade H10
Cutting speed (v_c)	100 m/min
Feed (f_n)	0.08 mm/rev
Cutting depth (a_e)	0.5 mm

Example 2

Product code	C3-391.39A-1-024 209A
Sleider	391.38A-1-T09A
Insert	TCMT 09 02 04-UF
Total overhang from gaugeline
Material	Steel ST52

hole diameter D [mm]	depth-of-cut a_p [mm]	Rotation speed n [rev/min]	cutting speed v_c [m/min]	Feed speed v_f [mm/min]	feed f_z [mm/rev]	function *)
25,60	0,30	2000	161	112	0,06	OK
26,00	0,05	3500	285	220	0,06	OK
26,10	0,05	2800	230	160	0,06	OK(Ra 1.3)
26,30	0,30	3500	165	220	0,06	OK
27,60	0.05	200	303	160	0,045	OK(Ra 1.2)

*) function denotes when vibrations occurred during the test

Example 3

Product code	C5-391.39A-2-046 336A
Sleider	391.38A-2-T11A
Insert	TCMT 11 02 04-UF
Total overhang from gaugeline
Material	Steel ST52

hole diameter D [mm]	depth-of-cut a_p [mm]	Rotation speed n [rev/min]	cutting speed v_c [m/min]	Feed speed v_f [mm/min]	feed f_z [mm/rev]	function *)
49,00	0,30	1000	153	56	0,056	OK
50,20	0,30	1800	283	140	0,077	OK(Ra 0.91)
50,60	0,05	1800	286	100	0,055	OK(Ra 0.85)
51,00	0,05	2240	355	210	0,05	OK

Silent Tools® is a definition of tool holder made to reduce vibrations due to a damper inside the tool body and is a trade mark of Teeness ASA. Damped boring bars are designed for high productivity, close tolerances and overhang beyond 4 x the bar diameter.