STEPS-TYPE ROUND CORE PINS

Minimum()=0.3 is available for the short tip() type,
depending on the shape you select. For details, refer to each page.

Type	Group	Head thickness (T)	Tolerance			Material
			Shaft diameter (D or P)	Shaped part (A,V)	Length (L,F)	SKH51 equivalent	SKD61 equivalent	NAK80	DH2F
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	CPM-1□□	-	-	-
						Tip short S-CPM-1□□	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	CPV-1□□	CPZ-1□□	-	-
						Tip short S-CPV-1□□	Tip short S-CPZ-1□□	-	-
	Standard		0 -0.005	±0.01	+0.02 0	CPH-1□□	CPP-1□□	CPK-1□□	CPG-1□□
						Tip short S-CPH-1□□	Tip short S-CPP-1□□	-	-
			-0.01 -0.02	±0.015		CPX-1□□	CPD-1□□	CPN-1□□	CPF-1□□
						Tip short S-CPX-1□□	Tip short S-CPD-1□□	-	-
		6·8mm (JIS)	-0.01 -0.02	±0.015		-	CPDJ-1□□	-	-
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	CPMB-1□□	-	-	-
						Tip short S-CPMB-1□□	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	CPVB-1□□	CPZB-1□□	-	-
						Tip short S-CPVB-1□□	Tip short S-CPZB-1□□	-	-
	Standard		0 -0.005	±0.01	+0.02 0	CPHB-1□□	CPPB-1□□	CPKB-1□□	CPGB-1□□
						Tip short S-CPHB-1□□	Tip short S-CPPB-1□□	-	-
			-0.01 -0.02	±0.015		CPXB-1□□	CPDB-1□□	CPNB-1□□	CPFB-1□□
						Tip short S-CPXB-1□□	Tip short S-CPDB-1□□	-	-
		6·8mm (JIS)	-0.01 -0.02	±0.015		-	CPDJB-1□□	-	-
	Standard	4mm(T4)	0 -0.005	±0.01	+0.02 0	L-CPH-1□□	-	-	-
			-0.01 -0.02	±0.015		-	L-CPD-1□□	-	-
	Standard	4mm (T4)	0 -0.005	±0.01	+0.02 0	L-CPHB-1□□	-	-	-
			-0.01 -0.02	±0.015		-	L-CPDB-1□□	-	-
	Precision	4mm (T4)	0 -0.005	±0.005	+0.01 0	GW□-CPV-1□□	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	GW□-CPH-1□□	-	-	-
			-0.01 -0.02	±0.015		GW□-CPX-1□□	-	-	-
	Precision	4mm (T4)	0 -0.005	±0.005	+0.01 0	GW□-CPVB-1□□	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	GW□-CPHB-1□□	-	-	-
			-0.01 -0.02	±0.015		GW□-CPXB-1□□	-	-	-
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	GV-CPM-1□□	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	GV-CPV-1□□	GV-CPZ-1□□	-	-
	Standard		0 -0.005	±0.01	+0.02 0	GV-CPH-1□□	GV-CPP-1□□	GV-CPK-1□□	GV-CPG-1□□
			-0.01 -0.02	±0.015		GV-CPX-1□□	GV-CPD-1□□	GV-CPN-1□□	GV-CPF-1□□
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	GV-CPMB-1□□	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	GV-CPVB-1□□	GV-CPZB-1□□	-	-
	Standard		0 -0.005	±0.01	+0.02 0	GV-CPHB-1□□	GV-CPPB-1□□	GV-CPKB-1□□	GV-CPGB-1□□
			-0.01 -0.02	±0.015		GV-CPXB-1□□	GV-CPDB-1□□	GV-CPNB-1□□	GV-CPFB-1□□

Type	Group	Head thickness (T)	Tolerance			Material
			Shaft diameter (D or P)	Shaped part (A,V)	Length (L,F)	STAVAXESRR Hardening steel	PROVA400 Hardening steel	SUS440C	MAS1C
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	-	-	-	-
						-	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	-	-	-	-
						-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	CPEH-1□□	CPRH-1□□	CPW-1□□	CPY-1□□
						-	-	-	-
			-0.01 -0.02	±0.015		CPTH-1□□	CPQH-1□□	-	CPA-1□□
						-	-	-	-
		6·8mm (JIS)	-0.01 -0.02	±0.015		-	-	-	-
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	-	-	-	-
						-	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	-	-	-	-
						-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	CPEHB-1□□	CPRHB-1□□	CPWB-1□□	CPYB-1□□
						-	-	-	-
			-0.01 -0.02	±0.015		CPTHB-1□□	CPQHB-1□□	-	CPAB-1□□
						-	-	-	-
						-	-	-	-
						-	-	-	-
		6·8mm (JIS)	-0.01 -0.02	±0.015		-	-	-	-
	Standard	4mm(T4)	0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-
	Standard	4mm (T4)	0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-
	Precision	4mm (T4)	0 -0.005	±0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-
	Precision	4mm (T4)	0 -0.005	±0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	-	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-
	Extra precision	4mm (T4)	0 -0.003	±0.005	+0.01 0	-	-	-	-
	Precision		0 -0.005	±0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	±0.01	+0.02 0	-	-	-	-
			-0.01 -0.02	±0.015		-	-	-	-

Tip tolerance values of tip(A,V)and length(L,F)are for reference only. The tolerance range varies depending on the shape selected. For details, refer to the Catalog page for each product.
"PROVA400 Hardening steel " and "MAS1C" will be discontinued when stocked materials are finished.

Type	Tolerance			Material
	Shaft diameter (D or P)	Shaped part (A,V)	Length (L,F)	SKH51 equivalent	SKD61 equivalent	SKD61 equivalent (TiCN coating)
	0 -0.005	±0.01	+0.02 0	F-CPHB1□□	-	-
	-0.01 -0.02	*±0.015	+0.02 0	-	F-CPDB1□□	HF-CPDB1□□

Tip tolerance values of tip(A,V)and length(L,F)are for reference only. The tolerance range varies depending on the shape selected. For details, refer to the Catalog page for each product.
TiCN coating is A±0.02,V±0.02.

Minimum()=0.6 is available for the short tip() type,
depending on the shape you select. For details, refer to each page.

Type	Group	Tolerance			Material
		Shaft diameter (D or P)	Shaped part (A,V,J,E)	Length (L,Y,F)	SKH51 equivalent	SKD61 equivalent	NAK80	DH2F	SUS440C	MAS1C
	Precision	0 -0.005	±0.005	+0.01 0	C□V□	C□Z□	-	-	-	-
	Standard	0 -0.005	±0.01	+0.02 0	C□H□	C□P□	C□K□	C□G□	C□W□	C□Y□
		-0.01 -0.02	±0.015		C□X□	C□D□	C□N□	C□F□	-	C□A□
	Precision	0 -0.005	±0.005	+0.01 0	C□VB□	C□ZB□	-	-	-	-
	Standard	0 -0.005	±0.01	+0.02 0	C□HB□	C□PB□	C□KB□	C□GB□	C□WB□	C□YB□
		-0.01 -0.02	±0.015		C□XB□	C□DB□	C□NB□	C□FB□	-	C□AB□

Tip tolerance values of tip(A,V,J,E)and length(L,Y,F)are for reference only. The tolerance range varies depending on the shape selected. For details, refer to the Catalog page for each product.

Use these data for reference only as they are dependent on specific heat treatment and usage conditions.
PROVA400 is equivalent to SUS420J2 upgrading steel from Fujikoshi.

Material		SKH51 High speed tool steel	SKD61 Thermal die steel	NAK80 Precipitation type prehardened steel	DH2F SKD61-type prehardened steel
Hardness　　　　HRC		58~60	48~52	37~43	38~42
Machining characteristics	Wear resistance	5	3.5	2	3
	Ability to be mirror-finished	4	4	5	3
	Toughness	3	5	1	4
	Corrosion resistance	3	3	3	3
Physical characteristics	Density [g/cm3]	8.2	7.75	7.8	7.75
	Modulus of longitudinal elasticity [kgf/mm2]	22300	21000	20500	21000
	Coefficient of thermal expansion [×10-6/°C]	10.1	10.8	12.5	10.8
	Thermal conductivity [cal/cm·sec·°C]	0.0509	0.061	0.1	0.061
Mechanical characteristics	Tensile strength [kgf/mm2]	235	135	128	135
	Charpy impact value [kgf·m/cm2]	2	6	2.2	4

Material		STAVAXESRR Hardening steel	PROVA400 Hardening steel	SUS440C Martensite type stainless steel	MAS1C Maraging Steel
Hardness　　　　HRC		50~54	50~54	56~60	50~54
Machining characteristics	Wear resistance	4	4	4	3.5
	Ability to be mirror-finished	5	5	4	5
	Toughness	5	5	3	5
	Corrosion resistance	5	5	5	3
Physical characteristics	Density [g/cm3]	7.8	7.8	7.78	8.02
	Modulus of longitudinal elasticity [kgf/mm2]	20400	21900	20400	18600
	Coefficient of thermal expansion [×10-6/°C]	11.0	10.9	10.2	10.1
	Thermal conductivity [cal/cm·sec·°C]	0.055	0.058	0.058	-
Mechanical characteristics	Tensile strength [kgf/mm2]	196	200	200	215
	Charpy impact value [kgf·m/cm2]	-	-	1.5	5

Process characteristics

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