SKD61 + Nitriding Concentricity ◎ 0.06 Head thickness 4mm
SHORT EJECTOR SLEEVES (BUSHINGS FOR STRAIGHT EJECTOR PINS)
High Speed Steel SKH51 Die Steel SKD61 + Nitriding
Quotation
Part Number T V Tolerance
Applicable center pin shaft diameter tolerance
Delivery
T V H7 Tolerance
※ Note that for sleeves with V dimension tolerance of H7, combination with center pins that have shaft diameter tolerance 0 –0.005 is not available. The reason for this is the fitting sections S are longer. (Details D P.219 )
ECB ECBB
V ≦ 3.0 3.1 ≦ V ≦ 6.0 V ≧ 6.1 +0.010 0 +0.012 0 +0.015 0
–0.01 –0.02
H7
–
–
Part Number – L
V
(KC/WKC...etc.)
Alterations
ECB8 – 50.00 – V4.0 – KC4.5
x 1
b 1 (Range of Guaranteed Shaft-diameter Precision)
4mm
Alteration details D P.225
JIS (6/8mm)
Alterations Code
Spec.
Alterations Code
Spec.
AG °
± 0.5
Two flats (angled) cutting KGC = 0.1mm increments AG = 1° increments D/2 ≦ KGC ＜ H/2, 0 ＜ AG ＜ 360
Single flat cutting KC = 0.1mm increments D/2 ≦ KC ＜ H/2
10mm
D V H7
R ≦ 0.5
KC
0 °
KGC
KC － 0.1 0
－ 0.02 － 0.01
φ 0.06
（ L － S ） － 0.05 0
T = 4
KGC
D(P) –0.01 –0.02
＋ 5 0
0 － 5
C = V + 0.5
S
Two flats cutting WKC = 0.1mm increments D/2 ≦ WKC ＜ H/2
120 ° 120 °
D(P) 0
Three flats cutting at 120° KTC = 0.1mm increments D/2 ≦ KTC ＜ H/2
＋ 0.02
WKC
－ 0.1 120 ° 0
–0.005
0 L
0 － 0.1
KTC
E Range of guaranteed shaft diameter precision (Details D P.221 ) x 1 max. = 10
WKC
KTC
◎ 0.003
E S dimension depends on the designated L dimension. L S 15.00–30.00 S = L 30.01–50.00 S = L–20
SKD61 + Nitrided
M Material H Hardness
Varied width parallel flats cutting KAC, KBC = 0.1mm increments only D/2 ≦ KAC ＜ KBC ＜ H/2
KAC KBC
Surface: 900HV– Base material: 40 ± 3HRC Range of guaranteed base material hardness (Details D P.223 ) Range of guaranteed surface hardness for nitriding (Details D P.224 )
Reduces the head thickness to less than standard. TC = 0.1mm increments E 2.0 ≦ TC ＜ 4, 4–TC ≦ Lmax.–L (Dimension L remains unchanged) E Dimensions (L–S) become shorter by (4–TC).
◎ 0.005
－ 0.1 0
－ 0.1 0
KAC
KBC
0 － 0.02
TC
TC
◎ 0.01
4
Two flats (right angled) cutting RKC = 0.1mm increments D/2 ≦ RKC ＜ H/2
RKC
◎ 0.03
RKC － 0.1 0
■ V Dimension Selection Type
Reduces the head diameter. HC = 0.1mm increments E D ≦ HC ＜ H
Part Number
◎ 0.06
L 0.01mm increments
C (V + 0.5)
H
V H7
V
Three flats cutting DKC = 0.1mm increments D/2 ≦ DKC ＜ H/2
HC
Type
D
E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
DKC
Standard
0 － 0.1
1.5 2.0 2.5 2.0 2.5 3.0 3.0 3.5 4.0 3.0 4.0 4.0 5.0 6.0 5.0 6.0 8.0
2.0 2.5 3.0 2.5 3.0 3.5 3.5 4.0 4.5 3.5 4.5 4.5 5.5 6.5 5.5 6.5 8.5
1.5 2.0 2.5 2.0 2.5 3.0 3.0 3.5 4.0 3.0 4.0 4.0 5.0 6.0 5.0 6.0 8.0
DKC
DKC
4
7
Total Length Designation
+ 0.010 0
Free Designation Shaft Diameter(P) Total Length Designation
5
8
6
9
+ 0.012 0 + 0.010 0
ECB
Stepped Shape
15.00–50.00
7
10
Taper Clearance
8
11
+ 0.012 0
Effective Margin(S) Long
Short Type
10
15
+ 0.015 0
–0.01 –0.02 center pins. It cannot be used for center pins with shaft diameter tolerance 0 –0.005 .
E ECB is a standard for shaft diameter tolerance E For 50.01 or more L dimension, use ESN–LC. ( D P.257 ) E Nitriding may extend to the head as it is applied after dimension V machining. ■ V Dimension Designation Type
Part Number
L 0.01mm increments
V 0.1mm increments
H
V H7
Type
D
1.6–1.9 2.1–2.4 2.1–2.4 2.6–2.9 3.1–3.4 3.6–3.9 3.1–3.9 4.1–5.0 4.1–4.9 5.1–5.9 5.1–5.9 6.1–7.9
4
7
+ 0.010 0
1.6–2.9
5
8
6
9
ECBB
15.00–50.00
7
10
+ 0.012 0
3.1–5.9
8
11
10
15
+ 0.015 0
6.1–7.9
E ECBB is a standard for shaft diameter tolerance –0.01 E For 50.01 or more L dimension, use ESN–L. ( D P.261 ) E Nitriding may extend to the head as it is applied after dimension V machining.
–0.02 center pins. It cannot be used for center pins with shaft diameter tolerance 0 –0.005 .
Part Number – L – V ECB6 – 20.53 – V3.0
267
268
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