High Speed Steel SKH51
STEPPED TWO–STEP CENTER PIN – SHAFT DIAMETER (P) 0.01 mm DESIGNATION TIP (A/V/J/E) TOLERANCE ± 0.01 TYPE –
Standard
Type
Designation 0.01 mm unit
Designation 0.1 mm unit C/R G/Q N
Flange thickness (T)
T Tolerance P
H
ℓ max.
Applicable ejector sleeve hole diameter tolerance + 0.005 0 E Note that for sleeves with V dimen- sion tolerance of 0 –0.005 , combina- tion with center pins that have shaft diameter tolerance + 0.01 0 is not recommended. The reason for this in the fitting sections of H7 ejector sleeve are longer. Details D P.219
4 mm JIS (6/8 mm) Nitriding Die Steel SKD61 High Speed Steel SKH51 Die Steel SKD61 +
Type
Type Step D L
P
F
Y
A
V
J Emin.
0.50 0.70
1.5
1.00 – 1.49 1.50 – 1.99 1.50 – 2.49 2.00 – 2.99 2.50 – 3.49 3.00 – 3.99 3.50 – 4.49 4.00 – 4.99 5.00 – 5.49 5.50 – 5.99 6.00 – 6.49 6.50 – 6.99 7.00 – 7.99 8.00 – 8.99 9.00 – 9.99 10.00 – 11.99
20 25 30 35 40 45
3 4 5 6 7
70.00 – 200.00
2
70.00 ı 250.00 100.00 ı 300.00
Refer to machining limits in the
Type CDHB5
2.5
Step D only 0.1 ≦ G ≦ 0.5 and G ＜ V–J 2 Step E only Q ≧ 0.3 and Q ≦ V–J 2
3
standard drawing Normally, α= 0 When using CX additional machining α= CX When using RX additional machining α= RX When using SR additional machining α=
0.1 ≦ C ≦ 1.5 and C ＜ P – A 2 Type CEHB5 R ≧ 0.3 and R ≦ P – A 2
3.5
1.00
CAHB5 CBHB5 CCHB5 CDHB5 CEHB5
A B C D E
4 mm (T4)
C □ HB5
0 –0.005
A ≧ V and V ＞ J
V ＞ J and J ≧ E
P ＞ A and A ≧ V
N ≧ 25.0 and (F–N) ≧ 30 and (F–N) ≦ 200
4
4.5
8
Range of guaranteed retention diameter precision (details D P.221 ) Range of guaranteed base material hardness (details D P.223 )
M material SKH51 H hardness 58 – 60 HRC
5
1.50
F ≧ 55.00
5.5
9
6
6.5
100.00 ı 350.00
Type Select the stepped shape (inside the circle) from the figure on the right CAHB5 R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ）
Step
50
10 11 14 15 17
7 8 9
(Designation of V ＝ E possible)
2.00
Type If CAHB5 is selected, no need to designate A
A Step
Step If A is selected, no need to designate J
Step If A is selected, V = E can be specified
Connection R
D (P) –0.01 –0.02
10 12
E – 2
2.50
D (P) 0
E Type CEHB5 is D ≧ 1.5(P ≧ 1.10) –
–0.005
T ＝ 4 － 0.02 0
Step
Select from the gure on the right
0 ＋ 5
Type – L – P – F – Y –A–V–J–E– C/G/R/Q –N CCHB5B 5 – 150.00 – P4.80 – F100.00 – Y120.00 – A4.50 – V4.20 – J3.80 – E2.80 – N30.0
（
F － N ）
－ 5 0
N
Total Length Designation Shaft Diameter(P) Total Length Designation
＋ 0.05
Order
ℓ
＋ 0.05 0
Y 0
F
Y
L ≧ Y ＋ 0 . 5 ＋α
（ L ＞ 200
＋ 0.05 ） 0
Y ≧ F ＋ 0 . 5
L ＋ 0.02 0
L
Quotation
Delivery
Two– stepshape
R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ）
B Step
CBHB5
R ≦ 0.2
R ≦ 0.2
Connection R
Steppedon –step
Type –L–P–F–Y–A–V–J–E–C/G/R/Q–N–(KC/WKC … etc.) CCHB5B 5 – 150.00 – P4.80 – F100.00 –Y120.00– A4.50 – V4.20 – J3.80 – E2.80 – N30.0 – WKC2.5
Alterations
Stepped two–step
Alteration details D P.287
0 － 0.02
T ＝ 4
Step
Alteration Code
Details
Alteration Code
Details
0 ＋ 5
－ 5 0
（
F － N ）
N
Changes the flange thickness TC = Designation 0.1 mm unit E 2.0 ≦ TC ＜ 4 (Dimensions L, Y, F, N remains unchanged) E 4−TC ≦ Lmax.−L
＋ 0.02
）
（ F ＞ 200 F
ℓ
F ＋ 0.02 0
0 ＋ 0.05
0 Y
Precision single flat cutting D/2 ≦ VKC ＜ H/2
VKC
VKC － 0.02 0
TC
＋ 0.05 ） 0
（ Y ＞ 200 Y
TC
Y
4
（ L ＞ 200
＋ 0.05 ） 0
L ≧ Y ＋ 0 . 7 ＋α
Y ≧ F ＋ 0 . 7
L ＋ 0.02 0
L
VWC Precision two flats cutting D/2 ≦ VWC ＜ H/2
＋ 0.1
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
0 － 0.02
2
About designation unit for key flat cutting
0
R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ）
VWC
NC
Ks ＝ 45 ° C
Step
R ≦ 0.2
CCHB5
K ＝ 45 °
± 1 °
4
Connection R
R ≦ 0.2
Single flat cutting D/2 ≦ KC ＜ H/2
KC
± 1 °
2
KC － 0.1 0
( 1) When designating the flange cut in alignment with retention diameter
NCW
4
WKC Two flats cutting D/2 ≦ WKC ＜ H/2
T ＝ 4 － 0.02 0
0 － 0.1
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
Step
WKC
NHC
217
＋ 5 F － N ） 0
P － A ＋
（
－ 5 0
V － J
N
Designation unit 0.05 mm unit is allowed
Y ≧ F ＋
0 . 5
L ≧ Y ＋
＋ 0 . 5 ＋α
Varied dimensions parallel flats cutting D/2 ≦ KAC ＜ H/2 KBC = Designation 0.1 mm unit only KAC ＜ KBC ＜ H/2
＋ 0.02
KAC KBC
0 ＋ 0.02 F （ F ＞ 200 F
）
Y 0
＋ 0.05 0
ℓ
2
2
－ 0.1 0
－ 0.1 0
KAC
KBC
When AC alteration is used
L ≧ Y ＋ 2tanAGC V － J When AGC alteration is used
Y
Y 0 ） ＋ 0.05
NHN
2tanAC P － A
1
2
3
（ Y ＞ 200
Y ≧ F ＋
＋ 0 . 5
＋ 0 . 5 ＋α
（ L ＞ 200
＋ 0.05 ） 0
L ＋ 0.02 0
L
Two flats (right angled) cutting D/2 ≦ RKC ＜ H/2
RKC
RKC － 0.1 0
CX = Designation 0.1 mm unit E 0.3 ≦ CX ≦ 0.5, CX ＜ E/2 E Available when P ≧ 2 E is the dimension prior to CX machining. ※α＝ CX RX = Designation 0.1 mm unit E P ≦ 4.5 c 0.3 ≦ RX ≦ 0.5, RX ＜ E/2 E P ＞ 4.5 c 0.3 ≦ RX ≦ 1.0 E Available when P ≧ 2 E is the dimension prior to RX machining. ※α＝ RX The tip is processed to be a spherical surface (SR). E Available when P ≧ 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 CCHB5 / CDHB5 E For CDHB5, C ≦ 1.0, A + 2 (C × tanAC°) ＜ P Standard Ks = 45° can be specified as an angle AGC = Designation 1° unit E 30 ≦ AGC ≦ 60 X Combination with RR not available E Step Applicable to C/D E Step For D, J + 2 (G × tanAGC°) ＜ V
R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ）
(2) To designate arbitrary key flat dimensions Designation unit 0.1 mm
± 0.1 CX
D
Step
CDHB5
CX
C ± 0.05
G
± 0.05
K ＝ 45 ° ± 1 °
Connection R
R ≦ 0.2 R ≦ 0.2
DKC Three flats cutting D/2 ≦ DKC ＜ H/2
Ks ＝ 45 ° ± 1 °
C
0 － 0.1
DKC
DKC
± 0.1 RX
RX
AG °
± 0.5
Two flats (angled) cutting D/2 ≦ KGC ＜ H/2 AG = Designation 1° unit 0 ＜ AG ＜ 360
KGC
0 °
0 － 0.02
T ＝ 4
Step
KGC
SR
0 ＋ 5
SR
（
F － N ）
－ 5 0
N
120 ° 120 °
＋ 0.02
R ≦ 0.2 R ≦ 0.2
Three flats cutting 120° distribution D/2 ≦ KTC ＜ H/2
0 Y
（ F ＞ 200 F
G
－ 0.1 120 ° 0
）
ℓ
F ＋ 0.02 0
0 ＋ 0.05
KTC
＋ 0.05 ） 0
（ Y ＞ 200 Y
KTC
Y
AC °
L ≧ Y ＋ G ＋ 0 . 5 ＋α
（ L ＞ 200
＋ 0.05 ） 0
L ＋ 0.02 0
Y ≧ F ＋ C ＋ 0 . 5
Changes the flange diameter HC = Designation 0.1 mm unit E D ≦ HC ＜ H E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
L
AC
HC
R ≦ 0.5 （ D ≦ 2 R ≦ 0.3 ）
E
Step
CEHB5
R ± 0.1
± 0.1 Q
Connection R
AGC °
Changes the flange diameter (precision) HCC = Designation 0.1 mm unit E D + 0.5 ≦ HCC ＜ H−0.3
AGC
HCC
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 P−A ≧ 1.0 Step For D, C ≧ 0.5
T ＝ 4 － 0.02 0
Step
RR
0 ＋ 5
RR
（
F － N ） ）
N － 5 0
＋ 0.02
Y 0
（ F ＞ 200 F
ℓ
F ＋ 0.02 0
＋ 0.05
0
（ Y ＞ 200 Y 0 ） ＋ 0.05
Y
L ≧ Y ＋ Q ＋ 0 . 5 ＋α
（ L ＞ 200
＋ 0.05 ） 0
Y ≧ F ＋ R ＋ 0 . 5
L ＋ 0.02 0
L
305
306
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