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Fdrill Parameters（2mm）

Fdrill Parameters:
Below you will find the parameters for all standard thread sizes, these parameters apply to mild steel 2mm.
Spindle speed is our recommend level however a variation of 20% plus or minus can be used, this may result in a shorter tool lifetime.
Stainless Steel reduce the RPM by 15%
Non-ferrous materials (copper, brass and aluminium) increace the RPM by 50%

1.Metric Thread Size

Thread Size	Fdrill				Form tap
Thread Size	FdrillØ [mm]	Spindle Speed [rpm]	Required Power [k/W]	Cycle Time [sec.]	Spindle Speed [rpm]
M2	1.8	3200	0.5	2	1600
M3	2.7	3000	0.6	2	1350
M4	3.7	2600	0.7	2	1000
M5	4.5	2500	0.8	2	800
M6	5.4	2400	1.0	2	650
M8	7.3	2200	1.3	2	500
M10	9.2	2000	1.5	3	400
M12	10.9	1800	1.7	3	330
M16	14.8	1400	2.2	4	250
M18	16.7	1300	2.5	5	220
M20	18.7	1200	2.7	5	200

2.American Standard Coarse (UNC)

Thread Size	Fdrill				Form tap
Thread Size	FdrillØ [mm]	Spindle Speed [rpm]	Required Power [HP]	Cycle Time [sec.]	Spindle Speed [rpm]
#4-40	2.5	3100	1.0	4	1350
#5-40	2.9	2900	1.0	4	1350
#6-32	3.1	2800	1.0	4	1000
#8-32	3.8	2600	1.0	4-5	1000
#10-24	4.3	2500	1.0	4-5	800
#12-24	4.9	2500	1.0	4-5	650
1/4-20	5.7	2400	1.5	4-5	650
5/16-18	7.2	2200	2.0	4-5	500
3/8-16	8.7	2000	2.0	5-6	400
7/16-14	10.2	1900	2.5	5-6	330
1/2-13	11.7	1700	2.5	5-6	330
9/16-12	13.2	1600	3.0	5-7	250
5/8-11	14.7	1400	3.5	5-7	250
3/4-10	17.8	1300	4.0	6-8	200

3.American Standard Fine (UNF)

Thread Size	Fdrill				Form tap
Thread Size	FdrillØ [mm]	Spindle Speed [rpm]	Required Power [HP]	Cycle Time [sec.]	Spindle Speed [rpm]
#4-48	2.6	3100	1.0	4	1350
#5-44	2.9	2900	1.0	4	1350
#6-40	3.2	2800	1.0	4-5	1000
#8-36	4.4	2600	1.0	4-5	800
#10-32	5.0	2500	1.0	4-5	650
#12-28	5.9	2500	1.0	4-5	650
1/4-28	7.4	2400	1.5	4-5	500
5/16-24	9.0	2200	2.0	4-5	400
3/8-24	12.1	2000	2.0	5-6	330
1/2-20	13.6	1700	2.5	5-6	250
9-16-18	15.2	1600	3.0	5-7	230
5/8-18	18.3	1400	3.5	5-6	200
3/4-16	18.7	1200	4.0	6-8	200

4.Taper Pipe Taps (NPT)

Thread Size	Fdrill				Ftap
Thread Size	FdrillØ [mm]	Spindle Speed [rpm]	Required Power [HP]	Cycle Time [sec.]	Spindle Speed [rpm]
1/16-27	7.0	2200	1.5	4	400
1/8-27	9.	2000	2.0	5	400
1/4-18	12.4	1700	3.0	5	360
3/8-18	15.8	1400	3.5	5	300
1/2-14	19.6	1200	4.5	6	270
3/4-14	24.9	900	5.5	7	200

5.British Standard Pipe (BSP/G)

Thread Size	Fdrill				Form tap
Thread Size	FdrillØ [mm]	Spindle Speed [rpm]	Required Power [k/W]	Cycle Time [sec.]	Spindle Speed [rpm]
BSP 1/8"	9.2	2000	1.5	3	400
BSP 1/4"	12.4	1600	2.0	3	360
BSP 3/8"	15.9	1400	2.3	4	300
BSP 1/2"	19.9	1200	3.0	5	270
BSP 3/4"	25.4	1000	3.5	6	200
BSP 1"	31.9	800	5.0	9	180

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Fdrill Parameters（2mm）

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