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EXTERNAL THREAD

EXTERNAL THREAD
Right Hand Thread		Left Hand Thread
Rihgt-Hand Holder		Left-Hand Holder
Holder	SET Holder MT Holder ET Holder SMG Holder	MT Holder SMG Holder

STANDARD OF DEPTH OF CUT
The chart on the right shows the cutting depths when machining external ISO metric screw threads. When you use Cermet grades or cut stainless steel, please increase the number of passes by 2－3 times.

Metric Screw Thread

P(Pitch)		0.75	1.00	1.25	1.50	1.75	2.00	2.50	3.00	3.50	4.00	4.50	5.00
h1		0.46	0.61	0.77	0.92	1.07	1.23	1.53	1.84	2.15	2.45	2.76	3.07
h2		0.35	0.47	0.59	0.70	0.82	0.94	1.17	1.41	1.65	1.87	2.11	2.35
r (Nose Radius)		0.11	0.14	0.18	0.22	0.25	0.29	0.36	0.43	0.50	0.58	0.65	0.72
Number of Passes	1	0.18	0.20	0.20	0.25	0.25	0.25	0.30	0.30	0.35	0.35	0.40	0.45
	2	0.13	0.15	0.18	0.20	0.20	0.25	0.25	0.25	0.30	0.30	0.35	0.40
	3	0.10	0.10	0.12	0.15	0.20	0.20	0.20	0.25	0.25	0.25	0.30	0.35
	4	0.05	0.10	0.12	0.15	0.15	0.15	0.20	0.20	0.20	0.25	0.25	0.30
	5		0.06	0.10	0.10	0.12	0.15	0.15	0.20	0.20	0.25	0.25	0.25
	6			0.05	0.07	0.10	0.10	0.10	0.15	0.20	0.20	0.20	0.25
	7					0.05	0.08	0.10	0.15	0.15	0.20	0.20	0.20
	8						0.05	0.10	0.10	0.15	0.15	0.15	0.20
	9							0.08	0.10	0.10	0.15	0.15	0.20
	10							0.05	0.09	0.10	0.10	0.15	0.15
	11								0.05	0.10	0.10	0.10	0.10
	12									0.05	0.10	0.10	0.10
	13										0.05	0.10	0.07
	14											0.06	0.05

(Note) The first pass causes a high load on the cutting edge.
In order to avoid damage, keep the depth of cut to 0.4－0.5mm maximum.

CUTTING FORM

Radial Infeed		Flank Infeed
	General threading. Thread pitch ≤4mm.		Low workpiece rigidity or occurrence of chattering. Difficult-to-cut materials such as stainless steel. Thread pitch ≥4mm.