STRAIGHT CORE PINS

Type	Group	Head thickness (T)	Tolerance		Material
			Shaft diameter (D or P)	Length (L)	SKH51 equivalent	SKD61 equivalent	NAK80
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	CPM-L	-	-
	Precision		0 -0.005	+0.01 0	CPV-L	CPZ-L	-
	Standard		0 -0.005	+0.02 0	CPH-L	CPP-L	CPK-L
			-0.01 -0.02		CPX-L	CPD-L	CPN-L
		6·8mm (JIS)	-0.01 -0.02		-	CPDJ-L	-
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	CPMB-L	-	-
	Precision		0 -0.005	+0.01 0	CPVB-L	CPZB-L	-
	Standard		0 -0.005	+0.02 0	CPHB-L	CPPB-L	CPKB-L
			-0.01 -0.02		CPXB-L	CPDB-L	CPNB-L
		6·8mm (JIS)	-0.01 -0.02		-	CPDJB-L	-
	-	4mm (T4)	0 -0.005	+5 +0.1	CPH-G	CPP-G	-
			-0.01 -0.02		CPX-G	CPD-G	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	CPML□	-	-
	Precision		0 -0.005	0 * -0.01	CPVL□	CPZL□	-
	Standard		0 -0.005	0 * -0.02	CPHL□	CPPL□	CPKL□
			-0.01 -0.02		CPXL□	CPDL□	CPNL□
		6·8mm (JIS)	-0.01 -0.02		-	CPDJL□	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	CPMBL□	-	-
	Precision		0 -0.005	0 * -0.01	CPVBL□	CPZBL□	-
	Standard		0 -0.005	0 * -0.02	CPHBL□	CPPBL□	CPKBL□
			-0.01 -0.02		CPXBL□	CPDBL□	CPNBL□
		6·8mm (JIS)	-0.01 -0.02		-	CPDJBL□	-
	Standard	-	0 -0.005	0 * -0.02	F-CPH□	F-CPD□	F-CPN□
			-0.01 -0.02		F-CPHE□	F-CPDE□	F-CPNE□
	Standard	4mm (T4)	0 -0.005	* +0.05 0	CPH□□ CPHB□□	CPP□□ CPPB□□	-
			-0.01 -0.02		CPX□□ CPXB□□	CPD□□ CPDB□□	-
	-	4mm (T4)	0 -0.005	+5 +0.1	CPH	-	-
			-0.01 -0.02		-	CPD	-

Type	Group	Head thickness (T)	Tolerance		Material
			Shaft diameter (D or P)	Length (L)	DH2F	STAVAXESRR (Prehardened steel)	STAVAXESRR (Herdening steel)	PROVA400 (Prehardened steel)
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	-	-	-	-
	Precision		0 -0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	+0.02 0	CPG-L	CPE-L	CPEH-L	CPR-L
			-0.01 -0.02		CPF-L	CPT-L	CPTH-L	CPQ-L
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	-	-	-	-
	Precision		0 -0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	+0.02 0	CPGB-L	CPEB-L	CPEHB-L	CPRB-L
			-0.01 -0.02		CPFB-L	CPTB-L	CPTHB-L	CPQB-L
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	-	4mm (T4)	0 -0.005	+5 +0.1	-	-	-	-
			-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	-	-	-	-
	Precision		0 -0.005	0 * -0.01	-	-	-	-
	Standard		0 -0.005	0 * -0.02	CPGL□	-	-	-
			-0.01 -0.02		CPFL□	-	-	-
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	-	-	-	-
	Precision		0 -0.005	0 * -0.01	-	-	-	-
	Standard		0 -0.005	0 * -0.02	CPGBL□	-	-	-
			-0.01 -0.02		CPFBL□	-	-	-
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Standard	-	0 -0.005	0 * -0.02	F-CPF□	-	-	-
			-0.01 -0.02		F-CPFE□	-	-	-
	Standard	4mm (T4)	0 -0.005	* +0.05 0	-	-	-	-
			-0.01 -0.02		-	-	-	-
	-	4mm (T4)	0 -0.005	+5 +0.1	-	-	-	-
			-0.01 -0.02		-	-	-	-

Type	Group	Head thickness (T)	Tolerance		Material
			Shaft diameter (D or P)	Length (L)	PROVA400 (Herdening steel)	SUS440C	C1720 (Beryllium copper)	MAS1C
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	-	-	-	-
	Precision		0 -0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	+0.02 0	CPRH-L	CPW-L	CPC-L	CPY-L
			-0.01 -0.02		CPQH-L	-	-	CPA-L
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	+0.01 0	-	-	-	-
	Precision		0 -0.005	+0.01 0	-	-	-	-
	Standard		0 -0.005	+0.02 0	CPRHB-L	CPWB-L	CPCB-L	CPYB-L
			-0.01 -0.02		CPQHB-L	-	-	CPAB-L
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	-	4mm (T4)	0 -0.005	+5 +0.1	-	-	-	-
			-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	-	-	-	-
	Precision		0 -0.005	0 * -0.01	-	-	-	-
	Standard		0 -0.005	0 * -0.02	-	CPWL□	CPCL□	CPYL□
			-0.01 -0.02		-	-	-	CPAL□
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Extra Precision	4mm (T4)	0 -0.003	0 * -0.01	-	-	-	-
	Precision		0 -0.005	0 * -0.01	-	-	-	-
	Standard		0 -0.005	0 * -0.02	-	CPWBL□	CPCBL□	CPYBL□
			-0.01 -0.02		-	-	-	CPABL□
		6·8mm (JIS)	-0.01 -0.02		-	-	-	-
	Standard	-	0 -0.005	0 * -0.02	-	-	F-CPC□	-
			-0.01 -0.02		-	-	F-CPCE□	-
	Standard	4mm (T4)	0 -0.005	* +0.05 0	-	-	-	-
			-0.01 -0.02		-	-	-	-
	-	4mm (T4)	0 -0.005	+5 +0.1	-	-	-	-
			-0.01 -0.02		-	-	-	-

*Tolerance of L dimension varies depending on the shape.
Following material will be discontinued when stocked materials are finished. PROVA400(Prehardened steel), PROVA400(Hardening steel), C1720(Beryllium copper) and MAS1C

Use these data for reference only as they are dependent on specific heat treatment and usage conditions.
Stainless Steel STAVAXESR^Ris rgistered trademarks of UDDEHOLM TOOL CO.
PROVA400 is equivalent to SUS420J2 upgrading steel from Fujikoshi. CO.

Material		SKH51 High speed tool steel	SKD61 Thermal die steel	NAK80 Precipitation type prehardened steel	DH2F SKD61-type prehardened steel	STAVAXESRR Prehardened steel	STAVAXESRR Hardening steel
Hardness　　　HRC		58~60	48~52	37~43	38~42	29~35	50~54
Machining characteristics	Wear resistance	5	3.5	2	3	3	4
	Ability to be mirror-finished	4	4	5	3	5	5
	Toughness	3	5	1	4	5	5
	Corrosion resistance	3	3	3	3	5	5
Physical characteristics	Density [g/cm3]	8.2	7.75	7.8	7.75	7.8	7.8
	Modulus of longitudinal elasticity [kgf/mm2]	22300	21000	20500	21000	21900	20400
	Coefficient of thermal expansion [×10-6/°C]	10.1	10.8	12.5	10.8	11.0	11.0
	Thermal conductivity [cal/cm·sec·°C]	0.051	0.061	0.1	0.061	0.055	0.055
Mechanical characteristics	Tensile strength [kgf/mm2]	235	135	128	135	115	196
	Charpy impact value [kgf·m/cm2]	2	6	2.2	4	-	-

Material		PROVA400 Prehardened steel	PROVA400 Hardening steel	SUS440C Martensite type stainless steel	C1720 Beryllium Copper	MAS1C Maraging Steel
Hardness　　　　HRC		29~35	50~54	56~60	38~45	50~54
Machining characteristics	Wear resistance	3	4	4	3	3.5
	Ability to be mirror-finished	5	5	4	3	5
	Toughness	5	5	3	4	5
	Corrosion resistance	5	5	5	4.5	3
Physical characteristics	Density [g/cm3]	7.8	7.8	7.78	8.3	8.02
	Modulus of longitudinal elasticity [kgf/mm2]	21900	21900	20400	13000	18600
	Coefficient of thermal expansion [×10-6/°C]	10.9	10.9	10.2	17.1	10.1
	Thermal conductivity [cal/cm·sec·°C]	0.058	0.058	0.058	0.275	-
Mechanical characteristics	Tensile strength [kgf/mm2]	115	200	200	133	215
	Charpy impact value [kgf·m/cm2]	-	-	1.5	-	5

Machining characteristics

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

Type	Group	Tolerance		Material
		Shaft diameter (D or P)	Length (L)	SKH51 equivalent	SKD61 equivalent	NAK80	DH2F
	Precision	0 -0.005	+0.01 0	GW□-CPV-L	-	-	-
	Standard	0 -0.005	+0.02 0	GW□-CPH-L	-	-	-
		-0.01 -0.02		GW□-CPX-L	-	-	-
	Precision	0 -0.005	+0.01 0	GW□-CPVB-L	-	-	-
	Standard	0 -0.005	+0.02 0	GW□-CPHB-L	-	-	-
		-0.01 -0.02		GW□-CPXB-L	-	-	-
	Extra Precision	0 -0.003	+0.01 0	GV-CPM-L	-	-	-
	Precision	0 -0.005	+0.01 0	GV-CPV-L	GV-CPZ-L	-	-
	Standard	0 -0.005	+0.02 0	GV-CPH-L	GV-CPP-L	GV-CPK-L	GV-CPG-L
		-0.01 -0.02		GV-CPX-L	GV-CPD-L	GV-CPN-L	GV-CPF-L
	Extra Precision	0 -0.003	+0.01 0	GV-CPMB-L	-	-	-
	Precision	0 -0.005	+0.01 0	GV-CPVB-L	GV-CPZB-L	-	-
	Standard	0 -0.005	+0.02 0	GV-CPHB-L	GV-CPPB-L	GV-CPKB-L	GV-CPGB-L
		-0.01 -0.02		GV-CPXB-L	GV-CPDB-L	GV-CPNB-L	GV-CPFB-L

Type	Tolerance		Material SKH51 equivalent
	Shaft diameter (D or P)	Length (L)	Concave character	Concave character (Sequential number)	Convex character
	0 -0.005	+0.02 0	CPH□M	CPH1MR	CPH□T
	-0.01 -0.02		CPX□M	CPX1MR	CPX□T
	0 -0.005		CPHB□M	CPHB1MR	CPHB□T
	-0.01 -0.02		CPXB□M	CPXB1MR	CPXB□T