O-Ring G Series

Brand :

MISUMI

Caution

Product Description

This is an economy item, The price is cheaper than the MISUMI standard product.

Product Overview

O-rings are sealing components that utilize the elastic interference of rubber materials. The economical O-ring G Series is manufactured according to the JIS B 2401 G Series standard.
The usage method is fixed type, and after installation, the O-ring remains in a fixed position.

Dimensional Drawing

Specifications Overview

The economical G Series O-rings are available in two materials: Nitrile Rubber and Fluororubber.

Type	Material	Hardness (JIS Hs)		Color	Usable Temperature Range	Intended Use
E-PACK-NGA	Nitrile Rubber	HS65	+10 0	Black	-20 to 100°C	For mineral oil resistance
E-PACK-NGF	Fluororubber	HS65	+10 0	Black	-10 to 200°C	For High Temperature

Specification Table

Part Number		JIS Nominal Number	W	Internal Diameter			Related Materials
Type	No.	JIS Nominal Number	W	do	NGA Tolerance	NGF Tolerance	d	Tolerance	D	Tolerance
JIS B 2401 G Series E-PACK-NGA (Nitrile Rubber·Black) E-PACK-NGF (Fluororubber·Black)	25	G25	3.1±0.1	24.4	±0.25	±0.30	25	0 -0.10	30	+0.10 0
	30	G30		29.4	±0.29	±0.35	30		35
	35	G35		34.4	±0.33	±0.40	35		40
	40	G40		39.4	±0.37	±0.45	40		45
	45	G45		44.4	±0.41	±0.50	45		50
	50	G50		49.4	±0.45	±0.54	50		55
	55	G55		54.4	±0.49	±0.59	55		60
	60	G60		59.4	±0.53	±0.64	60		65
	65	G65		64.4	±0.57	±0.69	65		70
	70	G70		69.4	±0.61	±0.74	70		75
	75	G75		74.4	±0.65	±0.78	75		80
	80	G80		79.4	±0.69	±0.83	80		85
	105	G105		104.4	±0.87	±0.87	105		110
	120	G120		119.4	±0.98	±0.98	120		125
	145	G145		144.4	±1.16	±1.16	145		150
	170	G170	5.7±0.1	169.3	±1.33	±1.33	170		180

Usage Method

Type	No.	G Dimension(Tolerance+0.25/0)			H Dimension H±0.05	R Dimension Max. Value
Type	No.	No Back-Up Ring	Back-Up Ring on One Side	Back-Up Rings on Both Sides	H Dimension H±0.05	R Dimension Max. Value
E-PACK-NGA E-PACK-NGF	25~145	4.1	5.6	7.3	2.4	0.7
E-PACK-NGA E-PACK-NGF	170	7.5	9	11.5	4.6	0.9

Product Feature

1. Simple structure and easy installation.
2. Wide variety of materials and sizes.

Precautions

After synthetic rubber comes into contact with different liquids, the following phenomena may occur depending on the type of liquid.
● Expands (swells) after absorbing liquid
● Bonding breaks down (decomposes) after chemical reaction
● Product becomes finer after additives precipitate (extraction)
The above adverse reactions for rubber often cause poor sealing performance in sealing products. It is recommended to confirm whether the material will react with the sealing medium before selecting sealing product materials.
In addition, temperature and the type of additives can also affect the reaction results; even reactions with the same medium can differ at different temperatures. When liquids are mixed, their combined effect multiplies, significantly increasing the impact on rubber.