RECTANGULAR EJECTOR PINS

RECTANGULAR EJECTOR PINS

Category				Type
Material		Head Thickness (T)	P·W Tolerance	Part Number	Part Number		Part Number	Part Number
SKH51 equivalent	Edge	4mm (T4)	0 -0.003	-	-		P-ERZF	-
			0 -0.005	-	P-ERVL		P-ERVF	-
		4mm (T4)small diameter	0 -0.005	-	-		P-ERVYF	-
	Normal	4mm (T4)	0 -0.003	-	-		ERZF	-
			0 -0.005	ERVB	ERVL		ERVF	ERVSF
			0 -0.01	ERPH	ERL		ERF	ERSF
		4mm (T4)small diameter	0 -0.005	-	-		ERVYF	-
		4·6·8mm (JIS)	0 -0.005	ERVJB	ERVJL		ERVJ	ERVSJF
			0 -0.01	ERJ	ERJL		ERJF	ERSJF
		8mm (JIS)	0 -0.02	ERJXB	ERJXL		ERJX	-
SKD61 equivalent + Nitrided				ERNXB	ERNXL		ERNX	-
Flat bar:SKH51 equivalent Shaft:SK4		6·8mm (JIS)		ERHK-B	ERHK-L		ERHK-F*	-

·For details, refer to the catalog page of each product.
*W dimension for ERHK-F can be selected.

R-CHAMFERED RECTANGULAR EJECTOR PINS

Category			Type
Material	Head Thickness(T)	P·W Tolerance	Part Number	Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	ERVLWR ERVLFR	ERVWR ERVFR	ERV□□R
		0 -0.01	ERLWR ERLFR	ERWR ERFR	ER□□R
	4·6·8mm (JIS)	0 -0.005	-	ERVJWR ERVJFR	ERVJ□□R
		0 -0.01	-	ERJWR ERJFR	ERJ□□R
	8mm (JIS)	0 -0.02	-	ERJXWR ERJXFR	-
SKD61 equivalent + Nitrided	8mm (JIS)	0 -0.02	-	ERNXWR ERNXFR	-

C-CHAMFERED RECTANGULER EJECTOR PINS

Category			Type
Material	Head Thickness(T)	P·W Tolerance	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	ERVF□□C
		0 -0.01	ERF□□C
	4·6·8mm (JIS)	0 -0.005	-
		0 -0.01	ERJF□□C

Characteristics of materials for straight ejector pins

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

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.

Rectangular Ejector Pins With Gas Vent

Category			Type
Material	Head Thickness(T)	P·W Tolerance	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	GV-ERVF
		0 -0.01	GV-ERF
	4·6·8mm (JIS)	0 -0.005	GV-ERVJ
		0 -0.01	GV-ERJF

RECTANGULAR EJECTOR PINS WITH TIP PROCESS

Category			Type
Material	Head Thickness(T)	P·W Tolerance	Rectangular Ejector Pins with Tip Process(Free designation)	Tip R processing (free designation)
			Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	ERV□□	ERVWR□□ ERVFR□□
		0 -0.01	ER□□	ERWR□□ ERFR□□
	4·6·8mm (JIS)	0 -0.005	ERVJ□□	ERVJWR□□ ERVJFR□□
		0 -0.01	ERJ□□	ERJWR□□ ERJFR□□

·For tip shapes, refer to click here.

RECTANGULAR EJECTOR PINS WITH ENGRAVING

Category			Type
Material	Head Thickness(T)	P·W Tolerance	Engraving type(Free designation type)	Tip R processing (free designation)
			Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	ERVF□M ERVF□MR	ERVWR□M ERVWR□MR	ERVFR□M ERVFR□MR
		0 -0.01	ERF□M ERF□MR	ERWR□M ERWR□MR	ERFR□M ERFR□MR

PRECISION RECTANGULAR EJECTOR PINS-RECTANGULAR SHANK TYPE

Category			Type
Material	Head Thickness (T)	P·W Tolerance	One Step
			Part Number
SKH51 equivalent	4mm (T4)	0 -0.005	ERSRP

D-SHAPED EJECTOR PINS

Category			Type
Material	Head Thickness(T)	D·P·W Tolerance	Part Number	Part Number
SKH51 equivalent	4mm (T4)	0 -0.01	ERDP	ERDF
	4·6·8mm (JIS)		ERDPJ	ERDFJ