STRAIGHT CENTER PINS

									Center pin shaft dia- meter tole- rance	Appli- cable ejector sleeve hole(V) tole- rance
Material	Head Thick- ness (T)	Shaft diameter tolerance	Shaft diameter(D) selection type			Shaft diameter(P) 0.01mm increments
	4mm (T4)	0 -0.005	CPH-5L□			CPHG-5L□			0 -0.005	+0.005 0
		-0.01 -0.02	CPHE-5L□			CPHGE-5L□			-0.01 -0.02	+0.01 0 or H7
	6·8mm (JIS)	0 -0.005	CPHJ-5L□			CPHJG-5L□			0 -0.005	+0.005 0
		-0.01 -0.02	CPHJE-5L□			CPHJGE-5L□			-0.01 -0.02	+0.01 0 or H7
	4mm (T4)	*Reference tolerance -0.01 -0.02	CPN-5L□			CPNG-5L□ (Shaft diameter 0.1mm increments)			-0.01 -0.02	+0.01 0 or H7
	6·8mm (JIS)		CPJ-5L□			CPJG-5L□ (Shaft diameter 0.1mm increments)
	4mm (T4)	*Reference tolerance -0.01 -0.02	RDCPN-5L□			-			-0.01 -0.02	+0.01 0 or H7
	6·8mm (JIS)		RDCPJ-5L□			-

*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.

Material		High Speed Steel SKH51	Dies Steel SKD61+Nitrided
Hardness　　　HRC		58~60	Surface base:900HV~ material: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 value [kgf·m/cm2]	2	4

Machining characteristics

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

Use these data for reference only as they are dependent on specific heat treatment and usage conditions.