Shaft diameter/Total length designation type
Die Steel SKD61 + Nitriding
STRAIGHT EJECTOR PINS –P/L DIMENSION DESIGNATION TYPE–
L
Part Number – L – P – (KC/WKC … etc.) EPJB 4.5 – 248.35 – P4.23 – WKC2.115
High Speed Steel SKH51 + Hard chromate Die Steel SKD61 + Nitriding High Speed Steel SKH51
Alterations
Alteration details D P.9
Alterations
Spec.
Alterations
Spec.
Code
Code
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
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 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
Die Steel SKD61
TC
b1 (Range of guaranteed shaft diameter precision)
x 1
0 － 0.1
TC
WKC
About Designation Unit for Key Flat Cutting
T
Varied dimension flat cutting P/2 ≦ KAC < H/2 KBC = 0.1mm increments only KAC < KBC < H/2
Pre–Hardened Die Steel SKD61
＋ 0.1
KAC KBC
0 d
T d ℓ 4 2 3 6 3 5 8 T d ℓ 1 4 2 5 6 3 8 T d ℓ 2 4 2 5 6 3 8
－ 0.1 0
－ 0.1 0
KAC
KBC
NC
R ≦ 0.5 （ P ≦ 1.99 R ≦ 0.3 ）
T
Stainless Steel SUS440C
(1) To align the key flat with the shaft diameter Unit of designation 0.005mm increments possible
RKC Two flats (right angled) cutting P/2 ≦ RKC < H/2
T
d
P
） ＋ 0.05 0
0 ＋ 0.02
0 － 0.1
（ L ＞ 200 L
NCW
RKC
L
4mm
T
DKC Three flats cutting P/2 ≦ DKC < H/2
JIS (6/8mm) JIS (6/8mm)
d
0 － 0.1
NCS
DKC
DKC
T
10mm
(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
0 － 0.1
217
SKC
P –0.01 –0.02 P 0 - 0.005
NHC
KD61 equivalent + Nitriding 900HV– Base material: 40–45HRC
M Material
Head thickness T T Tolerance
Part Number
± 0.5 AG ° 0 °
Two flats (angled) cutting P/2 ≦ KGC < H/2 AG = 1° increments 0 < AG < 360
H Hardness Surface:
T P dimension tolerance P ≦ 12.00 P ＞ 12.00
0 –0.02 0 –0.05
EPNB
KGC
4mm (T4)
Range of guaranteed shaft diameter precision/Base material hardness/Range of guaranteed surface hardness for nitriding (details D P.7 )
KGC
P 0
1 2 3
NHN
EPJB
6/8mm (JIS)
–0.01 –0.02
–0.01 –0.03
–0.002
120 ° 120 °
Three flats cutting at 120° P/2 ≦ KTC < H/2
0 － 0.1 120 ° KTC
Standard Size Total Length Designation
MC
P M P 8.00– 9.99 M4 P10.00–11.99 M5 P12.00–15.99 M6 P16.00–24.99 M8
Head tapping E Applicable for EPJB when P ≧ 8.00 X Combination with any other alteration not available
KTC
Part Number
0.01mm increments
Head thickness 4mm Head thickness JIS
MC
Type
M × 1
H T
H T
No.
L
P
Shaft Diameter Designation Shaft Diameter/ Total Length Designation
Head thickness 4mm Head thickness JIS
1.5
40.00–200.00 40.00–250.00
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 12.00–14.99 15.00–15.99 16.00–19.99 20.00–24.99
3 4 5 6
2
2.5
–
–
–
Tip Process
3
Engraving
3.5
40.00–400.00
7
4
Gas Vent
8
4.5
8
5
9
EPNB
5.5
4
6
9
6
10
6.5
10
11
7 8
EPJB
11 15 17 20 21
13 15 17 20 21 25 30
40.00–500.00
10 12 15 16 20 25
8
–
–
–
E Nitriding may extend to the head as it is applied after dimension P machining.
Part Number – L – P EPJB 6 – 175.31 – P5.61
Delivery Quotation
Order
31
32
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