SKH51 Concentricity ◎ 0.01 Wall thickness 0.6mm–
STEPPED EJECTOR SLEEVE –S DIMENSION LONG TYPE–
High Speed Steel SKH51 Die Steel SKD61 + Nitriding High Speed Steel SKH51
Delivery Quotation
PartNumber – D – L – P – V – N – S – (KC/WKC … etc.) ESVKBF–H – 4.0 – 120.05 – P3.80 – V2.60 – N70 – S26 – KC2.5
Alterations
4mm 4mm
Alteration details D P.225
Alterations Code
Spec.
Alterations Code
Spec.
E Range of guaranteed retention diameter (D) precision (Details D P.221 ) Step R (Details D P.222 ) E Range of guaranteed tip–diameter precision (b 2 ) (Details D P.222 ) E When 30 ＜ S ≦ 50, guaranteed range of V dimension precision is 10mm from tip.
Part Number
JIS (6/8mm)
Head thickness
T P Tolerance
T V Tolerance
Applicable center pin shaft diameter tolerance
D selection type D designation type ESVKFE–H ESVKBF–H
Reduces the head thickness to less than standard. TC = 0.1mm increments E T/2 ≦ TC ＜ T, T–TC ≦ Lmax.–L (Dimensions L, N, (L–S) remain unchanged)
Single flat cutting D/2 ≦ KC ＜ H/2
0 － 0.02
TC
KC
4mm (T4)
10mm
※ Note that for sleeves with V dimension tolerance of + 0.01 0
TC
KC － 0.02 0
0 –0.005
, combination with center pins that have shaft diameter
T
+ 0.01 0
–0.01 –0.02
ESVKJFE–H ESVKJBF–H
6/8mm (JIS)
0 –0.005 is not available. The reason for this is fitting
tolerance
D(P) –0.01 –0.02
Reduces the head diameter. HC = 0.1mm increments E D ≦ HC ＜ H
sections S are longer. (Details D P.219 )
–0.01 –0.02
WKC Two flats cutting D/2 ≦ WKC ＜ H/2
ESVKFE–M ESVKBF–M
4mm (T4)
0 － 0.02
D(P) 0
HC
WKC
0 － 3
＋ 3 0
E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft. Reduces the head diameter. (precision) HCC = 0.1mm increments E D + 1 ≦ HCC ＜ H–0.3 Performs C chamfering on the tip. CGX = 0.1mm increments E 0.2 ≦ CGX ≦ 1.5 and CGX ≦ P–V 2 –0.1 E Available when L–N ≧ 50 X Combination with RGX not available Performs R chamfering on the tip. RGX = 0.1mm increments E 0.3 ≦ RGX ≦ 1.5 and RGX ≦ P–V 2 –0.1 E Available when L–N ≧ 50 X Combination with CGX not available
–0.005
（ L － S ）
S
About Designation Unit for Key Flat Cutting
Varied width parallel flats cutting D/2 ≦ KAC ＜ H/2 KBC = 0.1mm increments only KAC ＜ KBC ＜ H/2
R ≦ 0.5
Step R
KAC KBC
◎ 0.003
－ 0.02 0
－ 0.02 0
KAC
KBC
◎ 0.005
HCC
(1) To align the key flat with the retention diameter Unit of designation 0.05mm increments possible
Two flats (right angled) cutting D/2 ≦ RKC ＜ H/2
◎ 0.01
RKC
RKC － 0.02 0
＋ 0.01 0 P
V
0
± 0.05 CGX 45 °
－ 0.02 T
b 2
◎ 0.03
＋ 5 0
CGX
φ 0.01
－ 5 0
（ L － N ）
N
DKC Three flats cutting D/2 ≦ DKC ＜ H/2
＋ 0.02
＋ 0.05 0
C = V + (0.2–0.4)
◎ 0.06
）
0 （ L > 200
L
L
L
0 － 0.02
DKC
DKC
M Material T Hardness
SKH51
Standard
58–60HRC Range of guaranteed base material hardness (Details D P.223 ) Overall quenching (No annealing on head)
RGX
± 0.1
Four flats cutting D/2 ≦ SKC ＜ H/2
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
SKC
－ 0.02 SKC 0
RGX
Total Length Designation
E Note that the Stepped Center Pin's shaft diameter (D) is too large to fit in the recess (C). (Details D P.220 )
L
AG °
± 0.5
Two flats (angled) cutting D/2 ≦ KGC ＜ H/2 AG = 1° increments 0 ＜ AG ＜ 360
■ D selection type Head thickness 4mm Head thickness JIS
Free Designation Shaft Diameter(P) Total Length Designation Shaft Diameter(P)
0 °
KGC
KGC
Part Number
0.01mm increments
N 1mm increments
S 0.5mm increments
120 ° 120 °
Three flats cutting at 120° D/2 ≦ KTC ＜ H/2
Type
－ 0.02 120 ° 0
Stepped Shape
KTC
Head thickness 4mm
Head thickness JIS
H T H T
D
L
P
V
KTC
Taper Clearance
■ Characteristics ① The fitting section (S) can be long up to V × 10. ② Precision wire cutting is used to make the S dimension longer. ③ A softened layer in the bore made by wire cutting is removed by polishing. (Tolerance of the dimension V is the value after polishing.) ④ The ejector sleeves are of high precision (concentricity: 0.01, tolerances of the dimension V: + 0.01 0 ) in addition to having a low price. ■ Precautions for use Use a structure that protects the sliding movement of ejector pins, such as precision ejector guide pins ( D P.873– ) and bushings ( D P.880– ).
3.5 40.00 –125.00
1.0 ≦ S ≦ (V × 10) and S ≦ 50
7
Effective Margin(S) Long Effective
4 5 6 7 8 9
• 0.80 ≦ V ＜ 2.00
–
– –
0.80 ≦ V ≦ (P–1.2)
40.00 –150.00
8 9
• V ≧ 2.00
3.20 ≦ P ≦ (D–0.1)
ESVKFE–H ( P 0 –0.005 ) ESVKFE–M ( P –0.01 –0.02 )
Short Type
10 11 13 14 15 17 17 19
40.00 –175.00
6
10 11 14 15 16 17 18
N ≧ L/2 (L–N ≧ 10)
4
L ≦ 200 2.00 ≦ V ≦ (P–1.2) L ＞ 200 2.00 ≦ V ≦ (P–1.6)
E When 30 ＜ S ≦ 50, guaranteed range of V dimension precision is 10mm from tip.
ESVKJFE–H ( P 0 –0.005 )
4.85 ≦ P ≦ (D–0.1) 5.35 ≦ P ≦ (D–0.1) 5.85 ≦ P ≦ (D–0.1) 6.35 ≦ P ≦ (D–0.1)
10 11 12 13
40.00 –250.00
8
■ D designation type Head thickness 4mm Head thickness JIS
Part Number
0.01mm increments
D 0.1mm increments
N 1mm increments
S 0.5mm increments
Type
Head thickness 4mm
Head thickness JIS
H T H T
L
P
V
3.5 – 4.0 4.1 – 5.0 5.1 – 6.0 6.1 – 7.0 7.1 – 8.0 8.1 – 9.0 9.1 –10.0 10.1 –11.0 11.1 –12.0 12.1 –13.0
7 8 9
1.0 ≦ S ≦ (V × 10) and S ≦ 50
–
– –
0.80 ≦ V ≦ (P–1.2)
40.00 –225.00
10 11 13 14 15 17 17 19
3.20 ≦ P ≦ (D–0.1)
ESVKBF–H ( P 0 –0.005 ) ESVKBF–M ( P –0.01 –0.02 )
6
10 11 14 15 16 17 18
N ≧ L/2 (L–N ≧ 10)
L ≦ 200 2.00 ≦ V ≦ (P–1.2) L ＞ 200 2.00 ≦ V ≦ (P–1.6)
4
E When 30 ＜ S ≦ 50, guaranteed range of V dimension precision is 10mm from tip.
ESVKJBF–H ( P 0 –0.005 )
4.85 ≦ P ≦ (D–0.1) 5.35 ≦ P ≦ (D–0.1) 5.85 ≦ P ≦ (D–0.1) 6.35 ≦ P ≦ (D–0.1)
40.00 –250.00
8
Part Number
–D–L–P–V–N–S
Order
(D selection type) – 120.05 – P3.80 – V2.60 – N75 – S26 (D designation type) ESVKBF–H – 4.6 – 120.05 – P3.80 – V2.60 – N75 – S26 ESVKFE–H 4
243
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