STRAIGHT CORE PINS

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 STAVAXESR®
(Prehardened
steel)
STAVAXESR®
(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

Material Characteristics of Straight Core Pins

Use these data for reference only as they are dependent on specific heat treatment and usage conditions.
Stainless Steel STAVAXESR®is 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
STAVAXESR®
Prehardened
steel
STAVAXESR®
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

GAS RELEASE STRAIGHT CORE PINS

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

STRAIGHT CORE PINS WITH ENGRAVING

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

Selection Method for Straight Core Pins with Tip Process

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