STRAIGHT CENTER PINS

STRAIGHT CENTER PINS WITH TIP PROCESS



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.

SELECTION METHOD FOR STRAIGHT CENTER PINS WITH TIP PROCESSED

Material characteristics of center pins

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.

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