High Speed Steel SKH51 + Hard chromate plating
Shaft diameter/Total length designation type
STRAIGHT EJECTOR PINS –P/L DIMENSION DESIGNATION TYPE–
L
Part Number – L – P – (KC/WKC … etc.) C-EPHJB 5 – 350.00 – P4.72 – KC2.5
High Speed Steel SKH51 + Hard chromate Die Steel SKD61 + Nitriding High Speed Steel SKH51
Alterations
Alteration details D P.9
Alterations Code
Spec.
Alterations Code
Spec.
Head diameter change HC = 0.1mm increments E P + 1 ≦ HC < H, P ≧ 1.5
Precision single flat cutting P/2 ≦ VKC < H/2
VKC
HC
VKC － 0.02 0
C － EPYB C － EPHB C － EPHJB
C － EPHBE C － EPHJBE
Head diameter change (precision) HCC = 0.1mm increments E P + 1 ≦ HCC < H–0.3, P ≧ 1.5 Head thickness change TC = 0.1mm increments E T/2 ≦ TC < T, P ≧ 1.5 (Dimension L remains unchanged) E T−TC ≦ Lmax.–L Dowel hole boring E Applicable when H ≧ 4 X Combination with other than
Precision two flats cutting P/2 ≦ VWC < H/2
VWC
HCC
b1 (Range of guaranteed shaft diameter precision)
Die Steel SKD61
x 1
VWC － 0.02 0
Pre–Hardened Die Steel SKD61
Unit of designation of key flat cutting
Single flat cutting P/2 ≦ KC < H/2
0
KC
TC
KC － 0.1 0
TC
－ 0.02
T 0.02 R ≦ 0.5 （ P ≦ 2 R ≦ 0.3 ） 0 －
T
Stainless Steel SUS440C
P － 0.02 － 0.01
＋ 0.1 0
0 －
P
d
0.005
＋ 0.05 0
L ＋ 0.02 0
）
T d ℓ 1 4 2 5 6 3 8 T d ℓ 4 2 3 6 3 5 8
（ L ＞ 200
WKC Two flats cutting P/2 ≦ WKC < H/2
L
NC
0 － 0.1
WKC
(1) To align the key flat with the shaft diameter Unit of designation 0.005mm increments possible C-EPYB only 0.0025mm increments possible
4mm
T
NHC/NHN/TMC/GVC not available
Varied dimension flat cutting P/2 ≦ KAC < H/2 KBC = 0.1mm increments only KAC < KBC < H/2
Dowel hole + Spring pin driving E Applicable when H ≧ 4 X Combination with other than
JIS (6/8mm)
d
KAC KBC
NCW
－ 0.1 0
－ 0.1 KBC 0
Head thickness T P Tolerance
Part Number
KAC
NHC/NHN/TMC/GVC not available
T
C-EPYB (Small diameter)
10mm
4mm (T4)
Numbering on the head Range of designation and Designation method: D P.10 E Available when H ≧ 2 X Combination with SKC/MC not available Automatic sequential numbering on the head Range of designation and Designation method: D P.10 E Available when H ≧ 2 X Combination with SKC/MC not available Lapping on the tip face E Available when P ≧ 0.6 E Hard chromate plating is applied after alternations. X C-EPYB Not available Gas vent machining S, B = 1mm increments E 2 ≦ S ≦ 10, S + 5 ≦ B ≦ 30 E Available when P ≧ 3 E Hard chromate plating is applied after alternations.
M Material SKH51 + Hard chromate plating H Hardness Surface: Base material: 58–60HRC Range of guaranteed shaft diameter precision/base material hardness (Details D P.7 ) C-EPYB is an overall quenched product. (No annealing on head) 900HV– (Reference value)
0 –0.005
C-EPHB C-EPHJB C-EPHBE C-EPHJBE
217
Two flats (right angled) cutting P/2 ≦ RKC < H/2
P –0.01 –0.02 P 0 - 0.005
RKC
NHC
RKC － 0.1 0
6/8mm (JIS)
4mm (T4)
–0.01 –0.02
E Tolerances of tip diameter/total length are figures after plating. E Plating may extend to the head.
6/8mm (JIS)
DKC Three flats cutting P/2 ≦ DKC < H/2
1 2 3
NHN
P 0
0 － 0.1
–0.002
DKC
DKC
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
Part Number
L 0.01mm increments
P 0.005mm increments
H
T
Standard Size Total Length Designation
Type
No. 0.4 0.5 0.6 0.7 0.8 0.9
Four flats cutting P/2 ≦ SKC < H/2
SKC
TMC
0.300–0.395 0.400–0.495 0.500–0.595 0.600–0.695 0.700–0.795 0.800–0.895 0.900–0.995
－ 0.1 SKC 0
L
C-EPYB ( P 0 –0.005 )
AG °
Shaft Diameter Designation Shaft Diameter/ Total Length Designation
Two flats (angled) cutting P/2 ≦ KGC < H/2 AG = Designation 1° increments 0 < AG < 360
± 0.5
20.00–60.00
2
4
0 °
KGC
GVC
S
KGC
B
1
120 ° 120 °
Head tapping E Applicable to P ≧ 8.00 of C–EPHJB/ C–EPHJBE X Combination with other than TMC/GVC not available
MC
Three flats cutting at 120° P/2 ≦ KTC < H/2
P M P 8.00– 9.99 M4 P10.00–11.99 M5
Tip Process
－ 0.1 120 ° 0
KTC
MC
Part Number
0.01mm increments
Head thickness 4mm Head thickness JIS
KTC
Type
M × 1
Engraving
H T
H T
No.
L
P
Head thickness 4mm Head thickness JIS
0.5 0.6 0.7 0.8 0.9
0.40– 0.49 0.50– 0.59 0.60– 0.69 0.70– 0.79 0.80– 0.89 0.90– 0.99 1.00– 1.49 1.50– 1.99 2.00– 2.49 2.50– 2.99 3.00– 3.49 3.50– 3.99 4.00– 4.49 4.50– 4.99 5.00– 5.49 5.50– 5.99 6.00– 6.49 6.50– 6.99 7.00– 7.99 8.00– 9.99 10.00–11.99
Gas Vent
■ Hard chromate plating on ejector pins
Hard chromate plating for hardness 900HV or higher is applied to base materials of SKH51 for improvement of wear resistance. The thickness of a plating layer of one side ( α ) is 0.001–0.002mm (reference value). By processing a shaft diameter of a base material to be thin in consider- ation of such thickness, the shaft diameter precision is guaranteed after plating. The range of guaranteed plating layer covers the b dimension section; however, plating may extend to the head as it is applied after dimension L,P machining. E The tip surface is also plated. Since the plating layer is too thin for surface hardness testing after plating, the surface hardness is a reference value.
C － EPYB C － EPHB C － EPHJB
40.00–100.00
C － EPHBE C － EPHJBE
x 1
b1 (Range of guaranteed shaft diameter precision)
3
40.00–150.00
1
-
-
–
40.00–200.00
1.5
C-EPHB ( P 0 –0.005 )
2
40.00–250.00
4 5 6
2.5
－ 0.01 － 0.02 P
－ 0.005 0
3
P
40.00–300.00
L
3.5
4
7
4
8
4.5
40.00–300.00 (350.00)
C-EPHBE ( P –0.01 –0.02 )
8
C-EPHJB ( P 0 –0.005 )
5
9
5.5
6
9
6
10
6.5
40.00–350.00
10
11
C-EPHJBE ( P –0.01 –0.02 )
7 8
11 15 17
13 15 17
10 12
8
E The L dimension enclosed in brackets ( ) is applicable only for C–EPHB/C–EPHBE.
Part Number – L – P C-EPHJB 5 – 350.00 – P4.72
Delivery Quotation
Order
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