Centerdrill - Process data

Process data

Basically, any column drilling machine or NC/CNC machining center with sufficient power and speed are suitable for the flow drilling process with centerdrill.

Centerdrill Technig

Required process data for the flow forming and thread forming process
Reference values for material S235JR (St37/2) with 2mm wall thickness

Metric ISO thread per DIN 13
		Centerdrill Flow Forming			Centertap Thread Forming
Thread	core hole Ø mm	RPM	Torque Nm	machine output kW	RPM	Torque Nm

M3 x 0,5	2,7	3000	2,5	0,7	1500	1,3
M4 x 0,7	3,7	2600	3	0,8	1100	3
M5 x 0,8	4,5	2500	4	0,9	900	4,9
M6 x 1	5,4	2400	5	1,1	800	9,3
M8 x 1,25	7,3	2100	7	1,5	600	19
M10 x 1,5	9,2	1800	10	1,7	380	39
M12 x 1,75	10,9	1500	14	1,9	300	50
M14 x 2	13	1500	16		300	55
M16 x 2	14,8	1400	19	2,4	200	57
M20 x 2,5	18,7	1200	29	3,0	160	105

Whitworth pipe thread
Thread	core hole Ø mm	RPM	Torque Nm	machine output kW	RPM	Torque Nm

G1/8''	9,2	1800	10	1,7	380	13
G1/4''	12,4	1600	16	2,1	280	34
G3/8''	15,9	1400	24	2,6	200	46
G1/2''	19,9	1200	32	3,2	140	94
G3/4''	25,4	1000	55	3,8	100	128

Please note:

Centerdrill flowdrilling in stainless steel:

Centerdrill core hole diameter + 0,1 mm from M8 to M12
10 - 20% lower speed (RPM)
higher machine performance => approx. 30%

Centerdrill flowdrilling in non-ferrous metals:

Up to 50% higher speed (RPM)

Feed rate for Centerdrill flowdrilling:

50 - 150mm/min
By using the centerdrill with flat cutters the feed rate should be substantially increased at the end of the process => 900mm/min

Depending on the application the machine conditions and the process data may also clearly vary from the above information. Our technicans are pleased to consult you.

Centerdrill Explorer – makes flow drilling easier!

All in one – Tool finder and process database for your application!

Our Centerdrill Explorer will show you the right RPM, feed rate and the required power for your machine, for a lot of materials und material thicknesses. All data available for the flow drilling process as well as for the thread forming process.

For example these data include specifications for following materials: stainless steel, steel, aluminum, copper and brass and for the material thicknesses between 0,8-12mm.