TAPERLESS CENTER PINS

TAPERLESS ONE-STEP CENTER PINS



Center
pin
shaft
dia-
meter
tole-
rance
Appli-
cable
ejector
sleeve
hoel(V)
tole-
rance
***Tip(A) tolerance Tip(A) tolerance
Material Head
Thick-
ness
(T)
Shaft diameter
tolerance
Shaft
diameter
(D)
selection type
Shaft
diameter
(P)
0.01mm
increments
Shaft
diameter
(D)
selection
type
Shaft
diameter
(P)
0.01mm
increments
4mm
(T4)
0
-0.005
CPHS-5□ CPHSG-5□ CPVS-5□ CPVSG-5□ 0
-0.005
+0.005
0
-0.01
-0.02
CPHSE-5□ CPHSGE-5□ CPVSE-5□ CPVSGE-5□ -0.01
-0.02
+0.01
0
or
H7
6·8mm
(JIS)
0
-0.005
CPHSJ-5□ CPHSJG-5□ CPVSJ-5□ CPVSJG-5□ 0
-0.005
+0.005
0
-0.01
-0.02
CPHSJE-5□ CPHSJGE-5□ CPVSJE-5□ CPVSJGE-5□ -0.01
-0.02
+0.01
0
or
H7
4mm
(T4)
*Reference
tolerance
-0.01
-0.02
CPNS-5□ **
CPNSG-5□
- - -0.01
-0.02
+0.01
0
or
H7
6·8mm
(JIS)
CPJS-5□ **
CPJSG-5□
- -
4mm
(T4)
*Reference
tolerance
-0.01
-0.02
RDCPNS-5□ - - - -0.01
-0.02
+0.01
0
or
H7
6·8mm
(JIS)
RDCPJS-5□ - - -
*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.
**For,the shaft diameter is designated by 0.1 mm increments.***For,tip(A) tolerance is .

TAPERLESS ONE-STEP CENTER PINS WITH COOLING HOLE



Material   SKD61 equivalent
+Nitrided
  Head   4mm(T4) 6·8mm(JIS)
Part No.   RDCPNS-5□ RDCPJS-5□   Tip  
Shape Material Part Number Page
STEPPED ONE-STEP CENTER PINS
SKH51 equivalent CPHB-5□
CPHBJ-5□
CPVB-5□
CPVBJ-5□
Listed in
stepped center
pin index
-
SKD61 equivalent
+
Nitrided
CPNB-5□
CPJB-5□
-
SKD61 equivalent CPDB-5□ Published on Internet
TWO-STEP CENTER PINS·STEPPED TWO-STEP CENTER PINS
SKH51 equivalent C□H5□
C□HE5□
-
C□HB5□ -

Selection Method for Taperless One-step Center Pins

Material characteristics of taperless 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 Values [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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