High Speed Steel SKH51
TWO–STEP CENTER PINS – SHAFT DIAMETER (D) SELECTION TIP (A/V/J/E) TOLERANCE: ± 0.01 TYPE –
Standard
Standard
Designation 0.1 mm unit
T Tolerance D
Flange thickness (T)
Type
Designation 0.01 mm unit
Applicable ejector sleeve hole diameter tolerance
4 mm JIS (6/8 mm) Nitriding Die Steel SKD61 High Speed Steel SKH51 Die Steel SKD61 +
Type
H
ℓ max.
Type Step D
L
F
Y
A
V
J
Emin.
C/R
G/Q
+ 0.005 0 Details D P.219
1
15 20 25 30 35 40 45
70.00 – 200.00
0.50 For
3 4 5 6 7
C □ H5
0 –0.005
1.5 70.00 ı 250.00 2 2.5
Refer to machining limits in the standard drawing
CAH5 CBH5 CCH5 CDH5 CEH5
Type CDH5 CDHE5 0.1 ≦ C ≦ 1.5 and C– D–A 2 For Type CEH5 CEHE5 R ≧ 0.3 and R ≦ D–A 2
Step D only 0.1 ≦ G ≦ 0.5 and G ＜ V–J 2 Step E only Q ≧ 0.3 and Q ≦ V–J 2
4 mm (T4)
0.70
V ＞ J and J ≧ E
A ≧ V and V ＞ J
D ＞ A and A ≧ V
3
+ 0.01 0
70.00 ı 300.00
A B C D E
or H7
3.5
C □ HE5
–0.01 –0.02
Range of guaranteed shaft diameter precision (Details D P.221 ) Range of guaranteed base material hardness (details D P.223 )
M material SKH51 H hardness 58 – 60 HRC
4
1.00
Normally, α= 0 When using CX additional machining α= CX When using RX additional machining α= RX When using SR additional machining α= E
Details D P.219
4.5
8
F ≧ 50.00
5
1.50
Type Select the stepped shape (inside the circle) from the figure on the right R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ） 0 － 0.02 T ＝ 4
Step
5.5 6 6.5 7
CAH5 CAHE5
Step If A is selected, V = E can be specified
Step If A is selected,
Type
9
CAHE5 CBHE5 CCHE5 CDHE5 CEHE5
(Designation of V ＝ E possible)
If selected, no need to designate A
A Step
CAHE5 CAH5
70.00 ı 350.00
no need to designate J
Select from the gure on the right
Step
50
10 11 14 15 17
2.00
D (P) –0.01 –0.02
8 9
Normally, α =0 ※ When using CX additional machining α =CX ※ When using RX additional machining α =RX ※ When using SR additional machining α = V 2
– 2
D (P) 0
10 12
–0.005
2.50
E Type CEH5/CEHE5 is D ≧ 1.5
Total Length Designation Shaft Diameter(P) Total Length Designation
ℓ
0 ＋ 0.05 F
＋ 0.05
Y 0
Type – L – F – Y –A–V–J–E–C/G/R/Q CCH5B 5 – 100.00 – F50.00 – Y52.00 – A4.50 – V4.20 – J3.80 – E2.80
Y
Order
（ L ＞ 200
）
L ＋ 0.02 0
0 ＋ 0.05
L ≧ Y ＋ 0.5 ＋α
Y ≧ F ＋ 0.5
L
Two– stepshape
T ＝ 4 － 0.02 0
B Step
CBHE5 CBH5
R ≦ 0.2
R ≦ 0.5 （ D ≦ 2
R ≦ 0.3 ）
R ≦ 0.2
Step
Quotation
Delivery
Steppedon –step
Normally, α =0 ※ When using CX additional machining α =CX ※ When using RX additional machining α =RX ※ When using SR additional machining α = V 2
Stepped two–step
Type –L–F–Y–A–V–J–E–C/G/R/Q–(KC/WKC … etc.) CCH5B 5 – 100.00 – F50.00 – Y52.00 – A4.50 – V4.20 – J3.80 – E2.80 – WKC2.5
Alterations
Alteration details D P.287
（ F ＞ 200
ℓ
）
0 ＋ 0.02 F
＋ 0.05 0
F
＋ 0.02
0 Y
Alteration Code
Details
Alteration Code
Details
Y
＋ 0.05 ） 0
（ Y ＞ 200
Y
Changes the flange thickness TC = Designation 0.1 mm unit E 2.0 ≦ TC ＜ 4,D ≧ 1.5 (Dimensions L, Y, F remains unchanged) E 4−TC ≦ Lmax.−L
（ L ＞ 200
）
L ＋ 0.02 0
0 ＋ 0.05
L ≧ Y ＋ 0.7 ＋α
L
Y ≧ F ＋ 0.7
Precision single flat cutting D/2 ≦ VKC ＜ H/2
VKC
TC
VKC － 0.02 0
TC
R ≦ 0.5 （ D ≦ 2
R ≦ 0.3 ）
0 － 0.02
T ＝ 4
4
C Step
CCHE5 CCH5
R ≦ 0.2
Normally, α =0 ※ When using CX additional machining α =CX ※ When using RX additional machining α =RX ※ When using SR additional machining α = V 2
Step
＋ 0.1
R ≦ 0.2
Precision two flats cutting D/2 ≦ VWC ＜ H/2
Dowel hole boring E Available when H ≧ 4 X Combination except for CX/RX/SR/AC/AGC/NHC/NHN/RR not available Dowel hole boring + Spring pin driving E Available when H ≧ 4 X Combination except for CX/RX/SR/AC/AGC/NHC/NHN/RR not available
VWC
Ks ＝ 45 °
2
0
± 1 °
K ＝ 45 °
± 1 °
NC
VWC － 0.02 0
4
2
Single flat cutting D/2 ≦ KC ＜ H/2
About designation unit for key flat cutting
KC
KC － 0.1 0
NCW
V － J
4
D － A ＋
L ≧ Y ＋
2 ＋
0.5 ＋α
ℓ
0 ＋ 0.02 F （ F ＞ 200
）
＋ 0.05 0
Y ≧ F ＋
＋ 0.02
F
0.5
Y 0
Numbering on the head Designation range and method: D P.288 E Available when H ≧ 2 Automatic sequential numbering on the head Designation range and method: D P.288 E Available when H ≧ 2
WKC Two flats cutting D/2 ≦ WKC ＜ H/2
(1) To align the key flat with the shaft diameter Designation unit 0.05 mm unit is allowed
2
217
NHC
Y
Y 0 ） ＋ 0.05
（ Y ＞ 200
0 － 0.1
＋ 0.5 2tanAC D － A When AC alteration is used Y ≧ F ＋
L ≧ Y ＋ 2tanAGC V － J When AGC alteration is used
WKC
（ L ＞ 200
）
L ＋ 0.02 0
0 ＋ 0.05
＋ 0.5 ＋α
L
Varied dimensions parallel flats cutting D/2 ≦ KAC ＜ H/2 KBC = Designation 0.1 mm unit only KAC ＜ KBC ＜ H/2
KAC KBC
1
2
3
NHN
－ 0.1 0
－ 0.1 0
T ＝ 4 － 0.02 0
D Step
KAC
KBC
CDHE5 CDH5
R ≦ 0.5 （ D ≦ 2
R ≦ 0.3 ）
± 0.05 G
C ± 0.05
Step
CX = Designation 0.1 mm unit E 0.3 ≦ CX ≦ 0.5, CX ＜ E/2 E Available when D ≧ 2 E is the dimension prior to CX machining. ※α＝ CX RX = Designation 0.1 mm unit E D ≦ 4.5 c 0.3 ≦ RX ≦ 0.5, RX ＜ E/2 D ＞ 4.5 c 0.3 ≦ RX ≦ 1.0 E Available when D ≧ 2 E is the dimension prior to RX machining. ※α＝ RX The tip is processed to be a spherical surface (SR). E Available when D ≧ 2 E L + 0.05 0 . ※α＝ E/2 E is the dimension prior to SR machining. Standard K = 45° can be specified as an angle AC = Designation 1° unit E 30 ≦ AC ≦ 60 E Type Applicable to CCH5/CCHE5/CDH5/CDHE5 E For CDH5/CDHE5, C ≦ 1.0, A + 2 (C×tanAC°) ＜ D
± 0.1 CX
Ks ＝ 45 ° ± 1 °
K ＝ 45 ° ± 1 °
CX
Two flats (right angled) cutting D/2 ≦ RKC ＜ H/2
RKC
Normally, α =0 ※ When using CX additional machining α =CX ※ When using RX additional machining α =RX ※ When using SR additional machining α = V 2
(2) To designate arbitrary key flat dimensions Designation unit 0.1 mm
RKC － 0.1 0
± 0.1 RX
RX
DKC Three flats cutting D/2 ≦ DKC ＜ H/2
R ≦ 0.2 R ≦ 0.2
0 － 0.1
R ≦ 0.2 R ≦ 0.2
DKC
DKC
C
0 ＋ 0.02 F （ F ＞ 200
ℓ
）
＋ 0.02
＋ 0.05 0
F
G
0 Y
SR
AG °
＋ 0.05 ） 0
Two flats (angled) cutting D/2 ≦ KGC ＜ H/2 AG = Designation 1° unit 0 ＜ AG ＜ 360
± 0.5
Y
（ Y ＞ 200
SR
Y
KGC
0 °
（ L ＞ 200
）
L ＋ 0.02 0
0 ＋ 0.05
L ≧ Y ＋ G ＋ 0.5 ＋α
Y ≧ F ＋ C ＋ 0.5
L
KGC
AC °
E Step
0 － 0.02
120 °
CEHE5 CEH5
T ＝ 4
R ≦ 0.5 （ D ≦ 2
R ≦ 0.3 ）
Three flats cutting 120° distribution D/2 ≦ KTC ＜ H/2
R ± 0.1
AC
－ 0.1 120 ° 0
± 0.1 Q
KTC
Step
120 °
KTC
Normally, α =0 ※ When using CX additional machining α =CX ※ When using RX additional machining α =RX ※ When using SR additional machining α = V 2
Standard Ks = 45° can be specified as an angle AGC = Designation 1° unit E 30 ≦ AGC ≦ 60 E Step Applicable to C/D X Combination with RR not available E Step For D, J + 2 (G × tanACG°) ＜ V Changes R normally 0.2 or less to R0.3 - 0.5 (for Strength improvement) Designation method RR E Step Applicable to B/C/D E D−A ≧ 1.0 Step For D, C ≧ 0.5
Changes the flange diameter HC = Designation 0.1 mm unit E D ≦ HC ＜ H, D ≧ 1.5 E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
AGC °
HC
AGC
ℓ
（ F ＞ 200
＋ 0.02
）
F ＋ 0.02 0
0 ＋ 0.05
F
Y 0
Changes the flange diameter (precision) HCC = Designation 0.1 mm unit E D + 0.5 ≦ HCC ＜ H−0.3
RR
HCC
Y 0 ） ＋ 0.05
Y
（ Y ＞ 200
RR
0 ＋ 0.02 L （ L ＞ 200
）
＋ 0.05 0
L ≧ Y ＋ Q ＋ 0.5 ＋α
L
Y ≧ F ＋ R ＋ 0.5
301
302
Powered by FlippingBook