STEPPED CORE PINS
■ One–Step Core Pins
Normal
Gas release
Free designation
Tapered
Taperless
Tapered
Taperless
Tapered
Taperless
Tapered
Tapered
Taperless
Tapered
Tapered
Tip part
F
F
L
L
Shaft diameter selection
Shaft diameter designation
Shaft diameter selection
Shaft diameter designation
Type
Free designation
Cutting facets
Headband
Cutting facets
Headband
Catalog Page P.367/371/375/391
P.369/373/377 P.379/383/387/391/393P.381/385/389
＊＊ Web–only products
P.395
Tolerance
Head thickness
Type
Type ( ＊＊ ) are Web–only products
M Material
Group
Shaft diameter (D or P)
Length (L, Y, F)
Tip part (A, V)
GW □ –CPH–1 □□
GV–CPHS– □□
GV–CPH–1 □□
GW □ –CPHB–1 □□
GV–CPHBS– □□
GV–CPHB–1 □□
F–CPHB1 □□
CPH–1 □□
CPHB–1 □□ Tip short ( ＊＊ ) S–CPHB–1 □□
+ 0.02 0
0 –0.005
±
CPHS– □□
CPHBS– □□
0.01
Tip short ( ＊＊ ) S–CPH–1 □□
GW □ –CPX–1 □□
GV–CPX–1 □□
GW □ –CPXB–1 □□
GV–CPXB–1 □□
–
–
–
Standard
4mm (T4)
CPX–1 □□
CPXB–1 □□
GW □ –CPV–1 □□
GV–CPVS– □□
GV–CPV–1 □□
GW □ –CPVB–1 □□
GV–CPVBS– □□
GV–CPVB–1 □□
+ 0.02 0
–
–0.01 –0.02
±
Tip short ( ＊＊ ) S–CPX–1 □□
Tip short ( ＊＊ ) S–CPHB–1 □□ CPVB–1 □□ Tip short ( ＊＊ ) S–CPVB–1 □□ CPMB–1 □□ Tip short ( ＊＊ ) S–CPMB–1 □□ CPPB–1 □□ Tip short ( ＊＊ ) S–CPPB–1 □□ CPDB–1 □□ Tip short ( ＊＊ ) S–CPDB–1 □□ TiCN coating H–CPDB1 □□ CPDJB–1 □□
–
–
0.015
GV–CPM–1 □□
GV–CPMB–1 □□
–
–
–
–
–
SKH51
CPV–1 □□
+ 0.01 0
0 –0.005
±
CPVS– □□
CPVBS– □□
Precision
4mm (T4)
0.005
Tip short ( ＊＊ ) S–CPV–1 □□ CPM–1 □□ Tip short ( ＊＊ ) S–CPM–1 □□
GV–CPPS– □□※
–
GV–CPP–1 □□
GV–CPPBS– □□※
GV–CPPB–1 □□
–
–
–
–
+ 0.01 0
0 –0.003
±
CPMS– □□
CPMBS– □□
Extra Precision 4mm (T4)
0.005
F–CPDB1 □□
CPP–1 □□
GV–CPD–1 □□
GV–CPDB–1 □□
–
–
–
–
+ 0.02 0
0 –0.005
±
CPPS– □□
CPPBS– □□
TiCN coating HF–CPDB1 □□
0.01
Tip short ( ＊＊ ) S–CPP–1 □□
CPD–1 □□
4mm (T4)
–
–
–
–
–
–
–
Tip short ( ＊＊ ) S–CPD–1 □□
Standard
+ 0.02 0
–0.01 –0.02
±
–
–
0.015
GV–CPZS– □□※
GV–CPZ–1 □□
GV–CPZBS– □□※
GV–CPZB–1 □□
–
–
–
SKD61
–
GV–CPK–1 □□
GV–CPKB–1 □□
–
–
–
–
–
+ 0.02 0
–0.01 –0.02
± 0.015
CPDJ–1 □□
6/8mm (JIS)
–
–
GV–CPN–1 □□
GV–CPNB–1 □□
–
–
–
–
–
CPZ–1 □□
CPZB–1 □□
+ 0.01 0
0 –0.005
±
CPZS– □□
CPZBS– □□
Precision
4mm (T4)
0.005
GV–CPG–1 □□
GV–CPGB–1 □□
–
–
–
–
–
Tip short ( ＊＊ ) S–CPZ–1 □□ CPK–1 □□ CPN–1 □□ CPG–1 □□ CPF–1 □□ CPEH–1 □□ CPTH–1 □□ CPRH–1 □□ CPQH–1 □□
Tip short ( ＊＊ ) S–CPZB–1 □□ CPKB–1 □□ CPNB–1 □□ CPGB–1 □□
GV–CPF–1 □□
GV–CPFB–1 □□
0 –0.005
–
–
–
–
–
± 0.01
CPKS– □□
CPKBS– □□
NAK80
–0.01 –0.02
± 0.015
–
–
–
–
–
–
–
–
–
0 –0.005
± 0.01
–
–
DH2F
–0.01 –0.02
± 0.015
CPFB–1 □□
–
–
■ Core Pins with Cooling Hole ■ One–Step Core Pins –Tip Lapped type–
0 –0.005
± 0.01
CPEHB–1 □□ CPTHB–1 □□ CPRHB–1 □□ CPQHB–1 □□
–
–
+0.02 0
–0.01 –0.02
(Hardening Steel)
± 0.015
–
–
Standard
4mm (T4)
Tip part/Type
Type
0 –0.005
± 0.01
–
–
PROVA 400 (Hardening Steel)
＊＊ Web–only products
Catalog Page
–0.01 –0.02
± 0.015
–
–
RS–CPDB1 □□ HRS–CPDB1 □□
RS–CPHB1 □□ HRD–CPDB1 □□ L–CPHB–1 □□ L–CPHBS– □□
RD–CPDB1 □□
RD–CPHB1 □□
RD–CPHB1C □
No coating
0 –0.005 0 –0.005
Core pins with cooling hole
± 0.01
CPW–1 □□
CPWS– □□
CPWB–1 □□
CPWBS– □□
SUS440C
TiCN coating
–
–
–
± 0.01
CPY–1 □□
CPYB–1 □□
–
–
L–CPH–1 □□ L–CPHS– □□
L–CPD–1 □□ L–CPPS– □□
L–CPDB–1 □□ L–CPPBS– □□
Tapered
– –
One–Step Core Pins –Tip Lapped Type–
MAS1C
–0.01 –0.02
Taperless
CPA–1 □□
CPAB–1 □□
± 0.015
–
–
E Tip tolerance values of tip (A,V) and length (L,Y,F) are for reference only. The tolerance range varies depending on the shape selected. For details, refer to the Catalog Page for each product.
■ Core Pins for Die Casting
Normal
■ Two–Step Core Pins
Tapered
Taperless
Tapered
Taperless
Tip part
F
F
Y
Y
L
L
Shaft diameter selection
Shaft diameter designation
Type
No Nitriding
Nitrided
No Nitriding
Nitrided
Type
Shaft diameter selection
Shaft diameter designation
Catalog Page
Catalog Page
P.413
P.413
P.415
P.415
P.397/399/401
P.403
P.405/407/409
P.411
Material
Head thickness
Tip part Straight Stepped
Type
Tolerance
Head thickness
DSPDL
DPDL DPD □
DSPB DSB □
DPB
Type ( ＊＊ ) are Web–only products
10 mm 10 mm
M Material
Group
Shaft diameter (D or P)
Tip part (A, V) Length (L, F)
SKD61(DAC)
DS □
DSDB □
C □ H5 □
C □ HB □
–
–
0 –0.005
± 0.01
Tip short ( ＊＊ ) S–C □ H □
Tip short ( ＊＊ ) S–C □ HB □
+ 0.02 0
Standard
–
–
■ Material Characteristics of Steps–Type Core Pins
SKH51
E Use the data for reference as the data will change depending on the heat treatment and usage conditions. E
–0.01 –0.02
C □ X □ C □ V □ C □ P □
C □ XB □ C □ VB □ C □ PB □
± 0.015 ± 0.005
–
–
is a registered trademark of UDDEHOLM TOOL CO. E PROVA400 is equivalent to SUS420J2 upgrading steel from Fujikoshi.
+ 0.01 0
0 –0.005
C □ SV □□
C □ SVB □□
Precision
NAK80 Deposition hardening Pre–hardened Steel
SUS440C Martensite Stainless steel
DH2F SKD61 Pre–hardened Steel
SKH51 High speed tool steel
SKD61 Thermal die steel
PROVA400 Hardening Steel
MAS1C Maraging steel
M Material
–
–
Hardening Steel
0 –0.005
± 0.01
Tip short ( ＊＊ ) S–C □ P □
Tip short ( ＊＊ ) S–C □ PB □
+ 0.02 0
H Hardness HRC Abrasion resistance
58–60
48–52
37–43
56–60
38–42
50–54
50–54
50–54
Standard
–
–
SKD61
5 4 3 3
3.5
2 5 1 3
4 4 3 5
3 3 4 3
4 5 5 5
4 5 5 5
3.5
–0.01 –0.02
C □ D □ C □ Z □ C □ K □ C □ N □ C □ G □ C □ F □ C □ W □ C □ Y □ C □ A □
C □ DB □ C □ ZB □ C □ KB □ C □ NB □ C □ GB □ C □ FB □ C □ WB □ C □ YB □ C □ AB □
± 0.015 ± 0.005 ± 0.01 ± 0.015 ± 0.01 ± 0.015 ± 0.01 ± 0.01 ± 0.015
–
–
Ability to be mirror–finished
4 5 3
5 5 3
Machining characteristics
4mm (T4)
+ 0.01 0
0 –0.005 0 –0.005
C □ SZ □□
C □ SZB □□
Precision
Toughness
Corrosion resistance
–
–
NAK80
Watt density
[g/cm 3 ]
8.2
7.75
7.8
7.78
7.75
7.8
7.8
8.02
–0.01 –0.02
–
–
Modulus of longitudinal elasticity [kgf/mm 2 ]
22300
21000
20500
20400
21000
20400
21900
18600
0 –0.005
–
–
Physical Characteristics
DH2F
+ 0.02 0
Coefficient of thermal expansion Thermal conductivity coefficient Tensile strength
–0.01 –0.02
[ × 10
–
–
Standard
10.1
10.8
12.5
10.2
10.8
11.0
10.9
10.1
–6 /K (°C)]
0 –0.005 0 –0.005
SUS440C
–
–
[cal/cm ・ sec ・ °C]
0.0509
0.061
0.1
0.058
0.061
0.055
0.058
–
–
–
[kgf/mm 2 ]
235
135
128
205
135
196
200
215
Mechanical Characteristics
MAS1C
–0.01 –0.02
Charpy impact values [kgf ・ m/cm 2 ]
–
–
361
362
2
6
2.2
1.5
4
–
–
5
Machining characteristics Poor 1 ⇐⇒ 5 Excellent
Conversion formula 1kgf/mm 2 ＝ 9.81N/mm 2 1cal/cm ・ sec ・ °C ＝ 418.6W/m ・ K 1kgf ・ m/cm 2 ＝ 9.81J/cm 2
E Tip tolerance values of tip (A,V) and length (L,Y,F) are for reference only. The tolerance range varies depending on the shape selected. For details, refer to the Catalog Page for each product.
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