Die Steel SKD61 + Nitriding
Total length designation type
STRAIGHT EJECTOR PINS –L DIMENSION DESIGNATION TYPE–
L
Part Number – L – (KC/WKC … etc.) EPN-L 4.5 – 225.55 – WKC2.25
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
KC Single flat cutting P/2 ≦ KC < H/2
HC
0 － 0.1
KC
b1 (Range of guaranteed shaft diameter precision)
x 1
Die Steel SKD61
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 NHC/NHN not available Dowel hole + Spring pin driving E Applicable when H ≧ 4 X C ombination 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
TC
0 － 0.1
TC
WKC
Pre–Hardened Die Steel SKD61
T
About Designation Unit for Key Flat Cutting
Varied dimension flat cutting P/2 ≦ KAC < H/2 KBC = 0.1mm increments only KAC < KBC < H/2
KAC KBC
＋ 0.1
R ≦ 0.5 （ P ≦ 2 R ≦ 0.3 ）
0 d
T d ℓ 1 4 2 5 6 3 8 T d ℓ 2 4 2 5 6 3 8 T d ℓ 4 2 3 6 3 5 8
－ 0.1 0
－ 0.1 0
Stainless Steel SUS440C
KAC
KBC
NC
T
P
＋ 0.05 0
＋ 0.5 0
＋ 0.02
T
0 （ 200 ＜ L ≦ 500
L ＞ 500
）
L
L
L
(1) To align the key flat with the shaft diameter Unit of designation 0.05mm increments possible
RKC Two flats (right angled) cutting P/2 ≦ RKC < H/2
d
4mm
0 － 0.1
NCW
RKC
JIS (6/8mm) JIS (6/8mm)
T
T P dimension tolerance
Head thickness T T Tolerance
Part Number
SKD61 equivalent + Nitriding 900HV– Base material: 40–45HRC S urface:
M Material H Hardness
DKC Three flats cutting P/2 ≦ DKC < H/2
d
L
P 1–13 15–20
25
0 –0.02 0 –0.05
EPN-L
0 － 0.1
10mm
4mm (T4)
NCS
–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
DKC
DKC
Range of guaranteed shaft diameter precision/Base material hardness/Range of guaranteed surface hardness for nitriding (details D P.7 )
T
EPJ-L
6/8mm (JIS)
P –0.01 –0.02 P 0 - 0.005
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
SKC Four flats cutting P/2 ≦ SKC < H/2
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
217
0 － 0.1
NHC
SKC
Head thickness 4mm
Head thickness JIS
Part Number
L 0.01mm increments (L ＞ 500 c 0.1mm increments)
AG °
Two flats (angled) cutting P/2 ≦ KGC < H/2 AG = Designation 1° increments 0 < AG < 360
± 0.5
Type
P 0
H T H T
P
0 °
KGC
–0.002
Head thickness 4mm
Head thickness JIS
1 2 3
NHN
KGC
1 1.1 1.2 1.3 1.4
40.00–150.00
Standard Size Total Length Designation
3
120 ° 120 °
1.5
Three flats cutting at 120° P/2 ≦ KTC < H/2
40.00–200.00
0 － 0.1 120 °
MC
P 8
M
Head tapping E Available for EPJ–L when P ≧ 8 X Combination with any other alteration not available
KTC
1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4
M4
4
MC
10 M5 12/15 M6 16–25 M8
KTC
40.00–400.00 40.00–300.00 40.00–400.00 40.00–300.00 40.00–500.00 40.00–400.00 40.00–500.00 40.00–400.00
Shaft Diameter Designation Shaft Diameter/ Total Length Designation
M × 1
5
–
2.5
– –
2.6 2.7 2.8 2.9
6
3
3.1 3.2 3.3 3.4
Tip Process
3.5
7
3.6 3.7 3.8 3.9
Engraving
4
40.00–400.00 (600.0)
(4.1) (4.2) (4.3) (4.4)
8
Gas Vent
4.5
40.00–400.00 (500.0)
8
EPN-L
(4.6) (4.7) (4.8) (4.9) 5 (5.1) (5.2) (5.3) (5.4)
4
40.00–500.00 (600.0)
9
40.00–400.00 40.00–500.00 40.00–400.00
6
5.5
9
(5.6) (5.7) (5.8) (5.9)
10
6
40.00–500.00 (800.0)
(6.1) (6.2) (6.3) (6.4)
40.00–400.00
EPJ-L
6.5
40.00–500.00 (700.0)
10
11
7 8
40.00–500.00 (1000.0)
11 15 17 18 20 21
13 15 17 18 20 21 25 30
10 12
(13)
40.00–500.00 (1000.0)
8
15 16 20
–
40.00–1000.00
– –
25 E The P dimension enclosed in brackets ( ) is applicable only for EPN–L. E The L dimension enclosed in brackets ( ) is applicable only for EPJ–L.
Part Number – L EPN-L 3 – 125.55
Delivery Quotation
Order
27
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