TAPERLESS CORE PINS

TAPERLESS CORE PINS

Type Tolerance Material
Group Shaft
diameter
(DorP)
Tip
part
(V,A)
Length
(L,Y,F)
SKH51
equivalent
SKD61
equivalent
NAK80 SUS440C
Standard 0
-0.005
0
-0.01
+0.02
0
CPHS-□□ CPPS-□□ CPKS-□□ CPWS-□□
Precision 0
-0.005
0
-0.005
+0.01
0
CPVS-□□ CPZS-□□ - -
Extra Precision 0
-0.003
0
-0.003
+0.01
0
CPMS-□□ - - -
Standard 0
-0.005
0
-0.01
+0.02
0
CPHBS-□□ CPPBS-□□ CPKBS-□□ CPWBS-□□
Precision 0
-0.005
0
-0.005
+0.01
0
CPVBS-□□ CPZBS-□□ - -
Extra Precision 0
-0.003
0
-0.003
+0.01
0
CPMBS-□□ - - -
Standard 0
-0.005
±0.01 +0.02
0
L-CPHS-□□ L-CPPS-□□ - -
0
-0.005
±0.01 +0.02
0
L-CPHBS-□□ L-CPPBS-□□ - -
Standard 0
-0.005
0
-0.01
+0.02
0
GV-CPHS-□□ GV-CPPS-□□ - -
Precision 0
-0.005
0
-0.005
+0.01
0
GV-CPVS-□□ GV-CPZS-□□ - -
Standard 0
-0.005
0
-0.01
+0.02
0
GV-CPHBS-□□ GV-CPPBS-□□ - -
Precision 0
-0.005
0
-0.005
+0.01
0
GV-CPVBS-□□ GV-CPZBS-□□ - -
Precision 0
-0.005
0
-0.005
+0.01
0
C□SV□□ C□SZ□□ - -
0
-0.005
0
-0.005
+0.01
0
C□SVB□□ C□SZB□□ - -
Length (L/Y/F)tolerance varies depending on the selected shape.

Material Characteristics of Taperless Core Pins

Use these data for reference only as they are dependent on specific heat treatment and usage conditions.
Material SKH51
Thermal
die steel
SKD61
High
speed
tool
steel
NAK80
Precipitation
hardened steel
group Pre
hardened steel
SUS440C
Martensite type
stainless steel
Hardness    HRC 58~60 48~52 37~43 56~60
Machining
characteristics
Wear resistance 5 3.5 2 4
Ability to be mirror-finished 4 4 5 4
Toughness 3 5 1 3
Corrosion resistance 3 3 3 5
Physical
characteristics
Density [g/cm3] 8.2 7.75 7.8 7.78
Modulus of longitudinal elasticity [kgf/mm2] 22300 21000 20500 20400
Coefficient of thermal expansion [×10-6/°C] 10.1 10.8 12.5 10.2
Thermal conductivity [cal/cm·sec·°C] 0.0509 0.061 0.1 0.058
Mechanical
characteristics
Tensile strength [kgf/mm2] 235 135 128 200
Charpy impact value [kgf·m/cm2] 2 6 2.2 1.5
Machining characteristics

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

Selection Method for Taperless One-step Core Pins

Selection Method for Taperless Two-step Core Pins

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