STRAIGHT EJECTOR PINS

Category			Type
Material	Head Thickness (T)	Shaft Diameter (P) Tolerance	Part Number	Part Number	Part Number	Part Number
	4mm (T4)	0 -0.002	-	EPV-L	EPV-G	EPVB
		0 -0.005	EPH	EPH-L	EPH-G	EPHB
		-0.01 -0.02	EPHE-B	EPHE-L	EPHE-G	EPHBE
	4mm (T4)Small Diameter	0 -0.005	-	EPY-L	EPY-G	EPYB
	6·8mm (JIS)	0 -0.005	EPHJ	EPHJ-L	EPHJ-G	EPHJB
		-0.01 -0.02	EPHJE	EPHJE-L	EPHJE-G	EPHJBE
	4mm (T4)	0 -0.005	-	-	-	C-EPHB
		-0.01 -0.02	-	-	-	C-EPHBE
	4mm (T4)Small Diameter	0 -0.005	-	-	-	C-EPYB
	6·8mm (JIS)	0 -0.005	-	-	-	C-EPHJB
		-0.01 -0.02	-	-	-	C-EPHJBE
	4mm (T4)	0 -0.005	EPDS	EPDS-L	EPDGS	EPDBS
		-0.01 -0.02	EPD	EPD-L	EPDG	EPDB
	4mm (T4)	*Representative tolerance -0.01 -0.02	EPN	EPN-L	EPNG	EPNB
	6·8mm (JIS)		EPJ	EPJ-L	EPJG	EPJB
	4·6·8mm (JIS)	*Representative tolerance -0.01 -0.02	EPAJ	EPAJ-L	EPAJG	EPAJB
	4mm (T4)	0 -0.005	EPW	EPW-L	EPWG	EPWB
	6mm (JIS)	0 -0.005	EPWJ	EPWJ-L	EPWJG	EPWJB

*The tolerance values for shaft diameter are representative ones. The tolerance range varies depending on the shaft size and/or length. For details, refer to the Catalog page of each product.

Category				Type
Type	Material	Head Thickness(T)	Shaft Diameter (P)Tolerance	Part Number	Part Number
Cutting facets	SKH51 equivalent	4mm (T4)	0 -0.005	GW□-EPH-L	GW□-EPHB
			-0.01 -0.02	GW□-EPHE-L	GW□-EPHBE
		6·8mm (JIS)	0 -0.005	GW□-EPHJ-L	GW□-EPHJB
			-0.01 -0.02	GW□-EPHJE-L	GW□-EPHJBE
Gas Release Grove (Tip diameter designation)		4mm (T4)	0 -0.005	GVB-EPH-L	GVB-EPHB
			-0.01 -0.02	GVB-EPHE-L	GVB-EPHBE
		6·8mm (JIS)	0 -0.005	GVB-EPHJ-L	GVB-EPHJB
			-0.01 -0.02	GVB-EPHJE-L	GVB-EPHJBE
Gas Release Groove		4mm (T4)	0 -0.005	GV-EPH-L	GV-EPHB-L
			-0.01 -0.02	GV-EPHE-L	GV-EPHBE-L
		6·8mm (JIS)	0 -0.005	GV-EPHJ-L	GV-EPHJB-L
			-0.01 -0.02	GV-EPHJE-L	GV-EPHJBE-L

■Material characteristics of Straight Ejector Pins:Click here for reference.

Category
Material	Head Thickness(T)	Shaft Diameter (P)Tolerance	Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.002	-	-
		0 -0.005	EPH□A	EPHB□A
		-0.01 -0.02	EPHE□A	EPHBE□A
	4mm (T4) Small Diameter	0 -0.005	-	-
	6·8mm (JIS)	0 -0.005	EPHJ□A	EPHJB□A
		-0.01 -0.02	EPHJE□A	EPHJBE□A
SKD61 equivalent	4mm (T4)	0 -0.005	EPDS□A	EPDBS□A
		-0.01 -0.02	EPD□A	EPDB□A
SKD61 equivalent + Nitrided	4mm (T4)	*Representative tolerance -0.01 -0.02	EPN□A	EPNB□A
	6·8mm (JIS)		EPJ□A	EPJB□A

Category
Material	Head Thickness(T)	Shaft Diameter (P)Tolerance	Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.002	EPV□M·EPV□MR (Sequential number)	EPVB□M·EPVB□MR (Sequential number)
		0 -0.005	EPH□M·EPH□MR (Sequential number) ·EPH□T	EPHB□M·EPHB□MR (Sequential number) ·EPHB□T
		-0.01 -0.02	EPHE□M·EPHE□MR (Sequential number) ·EPHE□T	EPHBE□M·EPHBE□MR (Sequential number) ·EPHBE□T
	4mm (T4) Small Diameter	0 -0.005	-	-
	6·8mm (JIS)	0 -0.005	EPHJ□M	EPHJB□M
		-0.01 -0.02	EPHJE□M	EPHJBE□M
SKD61 equivalent + Nitrided	4mm (T4)	*Representative tolerance -0.01 -0.02	EPN□M·EPN□MR (Sequential number)	-
	6·8mm (JIS)		EPJ□M·EPJ□MR (Sequential number)	-

Category			Type
Material	Head Thickness(T)	Shaft Diameter (P)Tolerance	Part Number
SKH51 equivalent	4mm(T4)	0 -0.005	Z-EPH-L
		-0.01 -0.02	Z-EPHE-L

Category			Type
Material	Head Thickness(T)	Shaft Diameter (P)Tolerance	Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	50PACK-EPH	100PACK-EPH
		-0.01 -0.02	50PACK-EPHE	100PACK-EPHE
SKD61 equivalent + Nitrided	4mm (T4)	-0.01 -0.02	50PACK-EPN	100PACK-EPN
	6·8mm (JIS)		50PACK-EPJ	100PACK-EPJ
SKH61 equivalent	4mm (T4)	-0.01 -0.02	50PACK-EPD	100PACK-EPD

Material		High Speed Steel SKH51	Dies Steel SKD61	Dies Steel SKD61 + Nitrided	Prehardened Dies Steel SKD61	Stainless Steel SUS440C
Hardness　　　HRC		58~60	50~55	Surface: 900HV~Base material(Core): 40~45	40~45	56~60
Machining characteristics	Wear resistance	5	4	4	3	4
	Ability to be mirror-finished	4	4	3	3	4
	Toughness	3	5	4	4	3
	Corrosion resistance	3	3	3	3	5
Physical characteristics	Density [g/cm3]	8.2	7.75	7.75	7.75	7.78
	Modulus of longitudinal elasticity [kgf/mm2]	22300	21000	21000	21000	20400
	Coefficient of thermal expansion [×10-6/°C]	10.1	10.8	10.8	10.8	10.2
	Thermal conductivity [cal/cm·sec·°C]	0.051	0.061	0.061	0.061	0.058
Mechanical characteristics	Tensile strength [kgf/mm2]	235	135	135	135	200
	Charpy impact values [kgf·m/cm2]	2	6	4	4	1.5

Machining characteristics

Conversion expression
1kgf/mm²=9.81N/mm²
1cal/cm·sec·°C=418.6W/M.K
1kgf·m/cm²=9.81J/cm²

Data may vary depending on heat processing and working conditions; use the data as reference.