Общий каталог Yamawa 2022 - 2023

Краткое руководство Yamawa по каталогам

Общий каталог Yamawa 2021

Каталоги Yamawa твердосплавные метчики для закаленной стали

Обший каталог Yamawa 2016 - 2017

16. Bored hole size before tapping ( for thread forming )

for Unified Threads

Unit：mm

Size	Class	Bored Hole Size	Expected minor Diameter of Internal Thread Size
No.0-80UNF	G5	1.43	1.26
No.1-72UNF	G5	1.75	1.56
	G4	2.01
No2-56UNC	G5	2.03	181
.	G6	2.04	.
	G7	2.05
No.2-64UNF	G4	2.03	1.85
No3-48UNC	G4	2.31	207
.	G5	2.33	.
No.3-56UNF	G4	2.34	2.13
	G5	2.61
No.4-40UNC	G6	2.62	2.30
	G7	2.64
No4-48UNF	G5	2.65	239
.	G6	2.66	.
No.5-40UNC	G5	2.94	2.62
N544UNF	G5	2.96	267
o.-	G6	2.97	.
	G5	3.19
No.6-32UNC	G6	3.20	2.80
	G7	3.21
No.6-40UNF	G5	3.25	2.95

Size	Class	Bored Hole Size	Expected minor Diameter of Internal Thread Size
	G6	3.85
No.8-32UNC	G7	3.86	3.44
	G8	3.88
No8-36UNF	G5	3.88	353
.	G6	3.89	.
N10-24UNC	G6	4.39	386
o.	G7	4.40	.
No10-32UNF	G6	4.50	409
.	G7	4.51	.
No.12-24UNC	G6	5.04	4.50
No.12-28UNF	G6	5.10	4.64
	G6	5.80
1/4-20UNC	G7	5.82	5.15
	G8	5.83
1/428UNF	G6	5.96	550
-	G7	5.97	.
5/16-18UNC	G7	7.33	6.61
3/8-24UNF	G7	9.07	8.54
7/16-14UNC	G8	10.32	9.40
7/16-20UNF	G8	10.57	9.92
1/2-13UNC	G8	11.84	10.86
1/2-20UNF	G8	12.15	11.50

for Helical Coil Wire Screw Thread Inserts
SURZ SURZ adopts special design on the thread root of tap, and is applicable to

Unit：mm the control of minor diameter of internal threads and seams of thread crests. Unit：mm

Size	Class	Recommended bored hole sizes	Size	Class	Recommended bored hole sizes
M1×0.25	G4	0.90	M2.3×0.4	G4	2.12
M1.2×0.25	G4	1.10	M2.5×0.45	G4	2.30
M1.4×0.3	G4	1.28	M2.6×0.45	G5	2.40
M1.6×0.35	G4	1.46	M3×0.5	G5	2.77
M1.6×0.2	G3	1.52	No. 2 - 56UNC	G4	1.98
M1.7×0.35	G4	1.56	No. 4 - 40UNC	G5	2.55
M2×0.4	G4	1.82	No. 6 - 32UNC	G5	3.14

Size	Class	Bored Hole Size	Expected minor Diameter of Internal Thread Size
STI M3×0.5	G3	3.41	3.18
STI M4×0.7	G4	4.57	4.24
STI M5×0.8	G4	5.65	5.27
STI M6×1	G4	6.80	6.33
STI M8×1.25	G4	9.01	8.40
STI M10×1.5	G5	11.21	10.47
STI M10×1.25	G5	11.02	10.40
STI M12×1.75	G6	13.42	12.54
STI M12×1.5	G6	13.21	12.47
STI M12×1.25	G6	13.01	12.40

* Material deformation can slightly change depending on material, hardness and shape of workpiece and cutting condition, and hole sizes should be changed accordingly.

for Miniature Screw Threads Please choose the suitable bored hole size.

Unit：mm

Size	Class	Bored Hole Size
S0.6×0.15	GS2	0.55
S0.7×0.175	GS3	0.63
S0.8×0.2	GS3	0.72
S0.9×0.225	GS4	0.81

Concerning bored hole sizes for metric extra fine screw series, please contact Yamawa or The Japan Research Institute for Technical Inf Screw Thread and Fastener.

Общий каталог Yamawa 2022 - 2023 - страница 1200

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16. Bored hole size before tapping ( for thread forming )

Общий каталог Yamawa 2022 - 2023 - страница 1200

Навигация

16. Bored hole size before tapping ( for thread forming )

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