Die Steel SKD61 + Nitriding
STRAIGHT EJECTOR PINS WITH GAS VENT –HEADBAND/L DIMENSION DESIGNATION TYPE/ P/L DIMENSION DESIGNATION TYPE–
Part Number – L – P – N – SV GV–EPN–L6 – 125.55 – N2.0 – SV9 GV–EPJB6 – 175.31 – P5.61 – N2.0 – SV9
High Speed Steel SKH51 + Hard chromate Die Steel SKD61 + Nitriding High Speed Steel SKH51
Order
Quotation Delivery
P
d
R ≦ 0.5 (Reference value)
Step R
4.00– 7.99 8.00–11.99 12.00–25.00
P–0.6 P–1.2 P–1.8
Part Number – L – P – N – SV – (KC/WKC … etc.) GV–EPN–L6 – 125.55 – N2.0 – SV9 – PCC5.97
Alterations
Die Steel SKD61
Enlarged view of B part C ＝ 0.1 ± 0.05
Enlarged view of A part
b 1 (Range of guaranteed shaft diameter precision)
Alteration details D P.9
x 1
Pre–Hardened Die Steel SKD61
Alterations Code
Spec.
Alterations Code
Spec.
＋ SV 5 0
＋ 0.5 0
＋ 0.2 0
（ L ＞ 500 c N
）
R ≦ 0.5
2
N
A part
Head diameter change HC = 0.1mm increments E P + 1 ≦ HC ＜ H
Single flat cutting P/2 ≦ KC < H/2
Stainless Steel SUS440C
HC
KC
KC － 0.1 0
Head thickness change TC = 0.1mm increments E T/2 ≦ TC ＜ T (Dimension L remains unchanged) E T−TC ≦ Lmax.−L Dowel hole boring E Applicable when H ≧ 4 X Combination with other than NHC/ NHN not available Dowel hole + Spring pin driving E Applicable when H ≧ 4 X Combination with other than NHC/ NHN not available Dowel hole + Dowel pin driving E Applicable when H ≧ 4 X Combination with other than NHC/ NHN not available
WKC Two flats cutting P/2 ≦ WKC < H/2
4mm
TC
B part
0 － 0.1
T
TC
About Designation Unit for Key Flat Cutting
WKC
＋ 0.02 0
＋ 0.05 0
＋ 0.5 0 , L ＞ 500 c L ）
（200＜L≦500 c L
P
JIS (6/8mm)
L
T
Varied dimension flat cutting P/2 ≦ KAC < H/2 KBC = 0.1mm increments only KAC < KBC < H/2
KAC KBC
＋ 0.1
T d ℓ 4 2 3 6 3 5 8
0 d
KBC － 0.1 0
10mm
KAC
NC
Part Number
Head thickness T T Tolerance
T P Tolerance
T
P –0.01 –0.02 P 0 - 0.005
(1) To align the key flat with the shaft diameter Unit of designation 0.05mm increments possible
Two flats (right angled) cutting P/2 ≦ RKC < H/2
P 4–13 15–20
4mm (T4)
0 –0.02
25
L
RKC
GV–EPN–L
ℓ 1
RKC － 0.1 0
T d 4 2
d
–0.01 –0.02 –0.01 –0.03
–0.01 –0.03 –0.01 –0.03
–0.01 –0.04 –0.01 –0.05
L ≦ 500 L ＞ 500
NCW
6/8mm (JIS)
0 –0.05
SKD61 equivalent + Nitriding 900HV– Base material: 40–45HRC Surface:
6 8
5
M Material H Hardness
GV–EPJ–L
3
P 0
T
DKC Three flats cutting P/2 ≦ DKC < H/2
–0.002
4mm (T4)
0 –0.02
0 － 0.1
Range of guaranteed shaft diameter precision/ Base material hardness/Range of guaranteed surface hardness for nitriding (details D P.7 ) ( Range of guaranteed shaft diameter precision is only for the shaft diameter except for gas vent. )
GV–EPNB
ℓ 2
DKC
DKC
T d 4 2
P ≦ 12.00 P ＞ 12.00 –0.01 –0.02 –0.01 –0.03
d
Standard Size Total Length Designation
NCS
6/8mm (JIS)
0 –0.05
6 8
5
GV–EPJB
Four flats cutting P/2 ≦ SKC < H/2
3
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
SKC
T
SKC － 0.1 0
Numbering on the head Range of designation and Designation method: D P.10 X Combination with SKC/MC not available Automatic sequential numbering on the head Range of designation and Designation method: D P.10 X Combination with SKC/MC not available
■ L dimension designation type
Shaft Diameter Designation Shaft Diameter/ Total Length Designation
217
± 0.5 AG ° 0 ° KGC 120 ° 120 °
Two flats (angled) cutting P/2 ≦ KGC < H/2 AG = Designation 1° increments 0 < AG < 360
NHC
Head thickness 4mm Head thickness JIS
Part Number
L 0.01mm increments (L ＞ 500 c 0.1mm increments)
KGC
N 0.5mm increments
SV 1mm increments
Type
H T H T
P
Head thickness 4mm Head thickness JIS
4
90.00–500.00 (700.0) 90.00–400.00 (500.00) 90.00–500.00 (700.0) 90.00–400.00 (500.00) 90.00–500.00 (700.0)
7
1 2 3
NHN
(4.1) (4.2) (4.3) (4.4)
8
Tip Process
Three flats cutting at 120° P/2 ≦ KTC < H/2
－ 0.1 120 ° 0
4.5
KTC
8
(4.6) (4.7) (4.8) (4.9)
P 8
M
KTC
MC
Engraving
Head tapping E Available for GV–EPN–L when P ≧ 8 X C ombination with any other alteration not available
5
M4
9
(5.1) (5.2) (5.3) (5.4)
90.00–400.00 90.00–500.00 90.00–400.00
MC
10 M5 12/15 M6 16–25 M8
6
5.5
2.0–10.0 L–(2 + SV + N) ≧ 15
Gas Vent
9
M × 1
(5.6) (5.7) (5.8) (5.9)
10
6
90.00–500.00 (700.0)
GV–EPN–L
4
(6.1) (6.2) (6.3) (6.4)
90.00–400.00
2–50 L–(2 + SV + N) ≧ 15
GV–EPJ–L
Tip shaft diameter alteration E P–0.08 ≦ PCC ＜ P–0.02 PCC = 0.01mm increments
6.5
10
11
PCC
7 8
11 15 17 18 20 21
13 15 17 18 20 21 25 30
10 12
90.00–500.00 (700.0)
(13)
■ Characteristics Let gas out from the inside of the cavity via the clearance around the ejector pin.
8
15 16 20 25
2.0–12.0 L–(2 + SV + N) ≧ 15
Example
90.00–700.0
– –
–
e The P dimension enclosed in brackets ( ) is applicable only for GV−EPN–L. e The L dimension enclosed in brackets ( ) is applicable only for GV−EPJ−L.
PL Line
■ P/L dimension designation type
Head thickness 4mm Head thickness JIS
Part Number
0.01mm increments
N 0.5mm increments
E 1mm increments
Type
H T H T
No.
L
P
Head thickness 4mm Head thickness JIS
4.5
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
8
8
5
9
5.5
9
6
6
10
2.0–10.0 L−(2 + SV + N) ≧ 15
6.5
10
11
GV–EPNB
7 8
4
2–50 L–(2 + SV + N) ≧ 15
GV–EPJB
90.00–500.00
11 15 17 20 21
13 15 17 20 21 25 30
10 12 15 16 20 25
10.00–11.99 12.00–14.99 15.00–15.99 16.00–19.99 20.00–24.99
Gas ow
8
2.0–12.0 L–(2 + SV + N) ≧ 15
– –
–
61
62
e Nitriding may extend to the head as it is applied after dimension P machining.
Powered by FlippingBook