P/L/N dimension designation type
High Speed Steel SKH51 + Hard chromate plating
STEPPED EJECTOR PINS –P/L/N DIMENSION DESIGNATION TYPE–
N
L
Part Number – L – P – N – (KC/WKC … etc.) C–EHSJFE 7 – 180.00 – P6.60 – N50 – SKC4.0
High Speed Steel SKH51
Alterations
Alteration details D P.99
Die Steel SKD61 + Nitrided Die Steel SKD61 Prehardened Die Steel SKD61 Stainless Steel SUS440C High Speed Steel SKH51 + Hard chromate
Alterations Code
Spec.
Alterations Code
Spec.
Head diameter change HC = 0.1mm increments E D + 1 ≦ HC ＜ H, D ≧ 1.5
Precision single flat cutting D/2 ≦ VKC ＜ H/2
VKC
HC
VKC － 0.02 0
C － EHSJF C － EHSF C － EHYF
C － EHSJFE C － EHSFE
Head diameter change (precision) HCC = 0.1mm increments E D + 1 ≦ HCC ＜ H–0.3, D ≧ 1.5
R ≦ 0.5
Precision two parallel flats cutting D/2 ≦ VWC ＜ H/2
VWC
HCC
Step R
（ D ≦ 2 R ≦ 0.3 ）
VWC － 0.02 0
Head thickness change TC = 0.1mm increments E T/2 ≦ TC ＜ T, D ≧ 1.5 (Dimensions L and N remains unchanged) E T–TC ≦ Lmax.–L
About Designation Unit for Key Flat Cutting
Single flat cutting D/2 ≦ KC ＜ H/2
TC － 0.02 0
KC
TC
KC － 0.1 0
－ 0.02 0
T
T
－ 0.01 － 0.02 P
（ L － N ）
－ 5 0
P － 0.005 0
N
＋ 0.1 0
Dowel hole boring E Available when H ≧ 4 X Combination with other than
0 ＋ 0.02
＋ 0.05 0
T d ℓ 4 2 3 6 3 5 8
d
（ L ＞ 200
）
L
L
Two flats cutting D/2 ≦ WKC ＜ H/2
(1) To align the key flat with the retention diameter Unit of designation 0.05mm increments possible
WKC
NC
4mm JIS (6/8mm) 10mm
WKC － 0.1 0
Part Number Head thickness T P Tolerance C–EHYF (Small diameter) 4mm (T4) 0 –0.005 C–EHSF C–EHSJF 6/8mm (JIS) C–EHSFE 4mm (T4)
NHC/NHN/TMC/GVC not available
T
M Material SKH51 + Hard chromate plating H Hardness Surface: Base material: 58–60HRC Range of guaranteed retention diameter (D) precision/base material hardness/Step R (Details D P.97 ) C–EHYF is applied with overall quenching. (No annealing on head) 900HV– (reference value)
Varied width parallel flats cutting D/2 ≦ KAC ＜ H/2 KBC = 0.1mm increments only KAC ＜ KBC ＜ H/2
Dowel hole + Spring pin driving E Available when H ≧ 4 X Combination with other than
ℓ 1
d
T d 4 2
KAC KBC
NCW
－ 0.1 0
－ 0.1 0
6 8
5
KAC
KBC
3
NHC/NHN/TMC/GVC not available
T
P –0.01 –0.02 –0.01 –0.02
–0.01 –0.02
E Tolerances of tip dimension and length are figures after plating. E Plating may extend to the head.
Numbering at the back part of the head Range of designation and Designation method: D P.100 X Combination with SKC/MC not available Automatic sequential numbering on the head Range of designation and Designation method: D P.100 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 Not available for C–EHYF 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.
C–EHSJFE
217
6/8mm (JIS)
Two flats (right angled) cutting D/2 ≦ RKC ＜ H/2
RKC
NHC
P 0
RKC － 0.1 0
–0.005
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
P 0.005mm increments
N 1mm increments
Part Number
L 0.01mm increments
H
T
P 0
Type
D
–0.002
0.5 0.6 0.7 0.8 0.9
0.300–0.400 0.300–0.500 0.300–0.600 0.300–0.700 0.300–0.800 0.300–0.900 0.300–1.000 0.300–1.100
DKC Three flats cutting D/2 ≦ DKC ＜ H/2
1 2 3
NHN
DKC － 0.1 0
Tip Diameter Designation Total Length Designation
DKC
N ≧ 15 and (L–N) ≧ 15
C–EHYF (Small diameter)
30.00–60.00
2
4
SKC Four flats cutting D/2 ≦ SKC ＜ H/2
TMC
－ 0.1 0
L
Tip Diameter Total Length Designation Tip Diameter Total Length Designation
SKC
1
1.1 1.2
AG °
± 0.5
Two flats (angled) cutting D/2 ≦ KGC ＜ H/2 AG = 1° increments 0 ＜ AG ＜ 360
Tip Process
0 °
KGC
GVC
Head thickness 4mm
Head thickness JIS
Part Number
0.01mm increments
S
KGC
Engraving
B
N 1mm increments
Type
H T H T
D
L
P
Head thickness 4mm
Head thickness JIS
MC
120 ° 120 °
Head tapping E Available when D ≧ 8, H ≧ 13, T = 8 X Combination with other than TMC/GVC not available
Gas Vent
D M 8–9 M4 10 M5 12 M6
Three flats cutting at 120° D/2 ≦ KTC ＜ H/2
－ 0.1 0 120 °
KTC
MC
40.00–100.00 100.01–150.00
0.30–0.90 0.60–0.90 0.60–1.00 0.60–1.10 0.60–1.20 0.60–1.30 0.60–1.40 0.80–1.50 0.80–1.60 0.80–1.70 0.80–1.80 0.80–1.90 0.80–2.40 1.00–2.90 1.50–3.40 1.50–3.90 2.50–4.40 3.00–4.90 3.50–5.40 4.00–5.90 4.50–6.40 4.90–6.90 5.90–7.90 6.90–8.90 7.90–9.90 8.90–11.90
KTC
1
M × 1
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9
3
■ Hard chromate plating on stepped 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 tip diameter (P) of a base material to be thin in consideration of such thickness, the tip diameter (P) precision is guaranteed after plating. The range of guaranteed plating layer covers the (L–N) dimension section; however, plating may extend to the head as it is applied after dimension L/P/N machining. E The tip surface is also plated. Since the plating layer is too thin for surface hardness testing after plating, the surface hard- ness is a reference value.
40.00–200.00
N ≧ 15 and 15 ≦ (L–N) ≦ 150
C － EHSF C － EHSJF C － EHYF
（ L － N ）
N
C － EHSFE C － EHSJFE
–
–
–
C–EHSF ( P 0 –0.005 )
4
40.00–250.00
－ 0.01 － 0.02 P
L
P － 0.005 0
2
2.5
5 6
4
3
40.00–300.00 (50.00–300.00)
3.5
C–EHSFE ( P –0.01 –0.02 )
7
4
8
4.5
C–EHSJF ( P 0 –0.005 )
8
5
• N ≧ 15 (T4) • N ≧ 30 (JIS) and 20 ≦ (L–N) ≦ 200
9
5.5
6
9
6
10
6.5
40.00–350.00 (50.00–350.00)
10
11
7 8 9
C–EHSJFE ( P –0.01 –0.02 )
11 14 15 17
13 14 15 17
8
10 12
E The figures in parentheses ( ) for L dimensions are applicable for C–EHSJF and C–EHSJFE only.
Part Number – L – P – N C–EHSJF 5 – 300.00 – P3.00 – N150
Delivery Quotation
105
106
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