Общий каталог Yamawa 2022 - 2023

Unit：mm

							Minor D	iameter			Bored Hole Size (reference)	reference Tap
Siz	e	L1	L3	L1+L3	Pipe End (B Maximum Value	asic Diamete Minimum Value	r Position) Tolerance	Position away Maximum Value	from Pipe En Minimum Value	d by (L1+L3) Tolerance	Maximum Size of Straight Bored Hole	Basic Diameter Position ℓg
①		②	③	④	⑤	⑥	⑦	⑧	⑨	⑩	⑪	⑫
1/16- 27	NPT	4.064	2.822	6.886	6.510	6.388	0.122	6.080	5.958	0.122	6.05	12.00
1/8- 27	NPT	4.102	2.822	6.924	8.857	8.736	0.122	8.425	8.303	0.122	8.39	12.05
1/4- 18	NPT	5.786	4.234	10.020	11.514	11.357	0.157	10.888	10.730	0.157	10.85	17.45
3/8- 18	NPT	6.096	4.234	10.330	14.953	14.796	0.157	14.308	14.150	0.157	14.27	17.65
1/2- 14	NPT	8.128	5.443	13.571	18.485	18.323	0.163	17.637	17.475	0.163	17.60	22.85
3/4- 14	NPT	8.611	5.443	14.054	23.831	23.668	0.163	22.952	22.790	0.163	22.91	22.95
1 - 111	/2NPT	10.160	6.627	16.787	29.868	29.696	0.173	28.819	28.647	0.173	28.78	27.40
11/4- 111	/2NPT	10.668	6.627	17.295	38.625	38.452	0.173	37.544	37.372	0.173	37.50	28.10
11/2- 111	/2NPT	10.668	6.627	17.295	44.695	44.522	0.173	43.614	43.441	0.173	43.57	28.40
2 - 111	/2NPT	11.074	6.627	17.701	56.732	56.560	0.173	55.626	55.454	0.173	55.58	28.00
21/2- 8	NPT	17.323	6.350	23.673	67.806	67.618	0.188	66.326	66.138	0.188	66.28	40.80
3 - 8	NPT	19.456	6.350	25.806	83.715	83.527	0.188	82.102	81.914	0.188	82.05	42.95

NPT INTERNAL THREAD L3 L1

NPT EXTERNAL THREAD

Remarks 1.	Pipe End is Basic Diameter Position
	(E1).
Remarks 2.	Effective Thread Length is the length
	away from Pipe End by (L1+L3).
Remarks 3.	Concerning bored hole s h a p e ,
	considering load on taps, taper bored
	hole is recommended.
Remarks 4.	When applying taper bored hole, by

referring to values in shown columns ⑤ , ⑥ and ⑧ , ⑨ , prepare the taper hole by using pipe reamer (1/16 taper). By referring to values shown

in column ⑪ , select the drill diameter before reaming by taking reamer's margin into account.

Remarks 5. When preparing straight bored hole,

by referring to values shown in column ⑪ , select drill diameter.

Technical Inf

Общий каталог Yamawa 2022 - 2023 - страница 1195