SKD61 + Nitriding Concentricity ◎ 0.03 Head thickness 4mm/JIS
STEPPED EJECTOR SLEEVE
PartNumber–L–V–P–C–N–S ESNVF8 – 200.05 – V4.0 – P7.05 – C4.5 – N120 – S30 ESJVF10 – 200.05 – V4.5 – P7.55 – C6.0 – N120 – S30
High Speed Steel SKH51 Die Steel SKD61 + Nitriding
Order
Quotation
Delivery
4mm
– (KC/WKC...etc.)
PartNumber–L–V–P–C–N–S
JIS (6/8mm)
T L Tolerance L ≦ 200 L ＞ 200
Head thickness (T)
Alterations
T P Tolerance
T D Tolerance
T T Tolerance
T V Tolerance
ESNVF6 – 150.00 – V2.5 – P5.50 – C3.1 – N80 – S30 – KC3.5 ESJVF6 – 150.00 – V3.0 – P5.50 – C4.0 – N80 – S30 – KC3.5
Part Number
Applicable center pin shaft diameter tolerance
T V H7 Tolerance
Alteration details D P.225
10mm
※ Note that for sleeves with V dimension tolerance of H7, com- bination with center pins that have shaft diameter tolerance 0 –0.005 is not recommended. The reason for this is the fitting sections S are longer. (Details D P.219 )
4mm (T4)
–0.01 –0.02 –0.02 –0.04
0 –0.02 0 –0.05
ESNVF
V ≦ 3.0 3.1 ≦ V ≦ 6.0 V ≧ 6.1 + 0.010 0 + 0.012 0 + 0.015 0
+
Alterations Code
Spec.
Alterations Code
Spec.
+ 0.05 0
0.02 0
–0.01 –0.02
–0.01 –0.02
H7
6/8mm (JIS)
ESJVF
D(P) –0.01 –0.02
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) E TC tolerance is equal to T dimension tolerance.
Single flat cutting D/2 ≦ KC ＜ H/2
＋ 5 0
－ 5 0
KC
（
L － S ）
S
KC － 0.1 0
TC
D(P) 0
TC
–0.005
R ≦ 0.5
T
Step R
About Designation Unit and Tolerance for Key Flat Cutting
◎ 0.003
Two flats cutting D/2 ≦ WKC ＜ H/2
Reduces the head diameter. HC = 0.1mm increments E D ≦ HC ＜ H
WKC
0 － 0.1
WKC
◎ 0.005
HC
E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
V
H7
Varied width parallel flats cutting D/2 ≦ KAC ＜ H/2 KBC = 0.1mm increments only KAC ＜ KBC ＜ H/2
◎ 0.01
T
b 2
－ 0.01 － 0.02
φ 0.03
KAC KBC
P
(1) To align the key flat with the retention diameter Unit of designation 0.05mm increments possible E The tolerance is 0 –0.1 even when D/2 is designated to fit to the retention diameter.
＋ 5 0
0 － 5
－ 0.1 0
－ 0.1 0
（ L － N ）
N
KAC
KBC
◎ 0.03
C = designated dimension
L
◎ 0.06
SKD61 + Nitrided
M Material H Hardness
Two flats (right angled) cutting D/2 ≦ RKC ＜ H/2
RKC
Surface: 900HV– Base material: 40 ± 3HRC E Range of guaranteed retention diameter (D) precision (Details D P.221 ) Range of guaranteed base material hardness (Details D P.223 ) Range of guaranteed surface hardness for nitriding (Details D P.224 ) Step R (Details D P.222 ) E Range of guaranteed tip-diameter precision (b 2 ) (Details D P.222 )
RKC － 0.1 0
Standard
E Nitriding may extend to the head as it is applied after dimension V and P machining. E Note that, the recess diameter (C) ≧ the retention diameter (D) + 1.0 is necessary in order to be able to insert a stepped center pin's retention diameter (D) into the recessed hole (C). (Details D P.220 )
Total Length Designation
Three flats cutting D/2 ≦ DKC ＜ H/2
DKC
0 － 0.1
DKC
DKC
Free Designation Shaft Diameter(P) Total Length Designation Shaft Diameter(P)
■ Head thickness 4mm
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
Four flats cutting D/2 ≦ SKC ＜ H/2
V 0.1mm increments
L 0.01mm increments
C 0.1mm increments
E P 0.01mm increments
SKC
1mm increments
Part Number
－ 0.1 SKC 0
Cmax.
H T
Type
D
N
S
Stepped Shape
AG °
± 0.5
1.5–2.0 3.00–3.95 2.0–2.5 3.50–4.45 2.0–3.0 3.50–4.95 2.0–3.5 3.50–5.45 2.0–4.0 4.00–5.95 2.0–4.5 4.00–6.45 2.0–5.0 4.00–6.95 2.0–5.5 4.00–7.45 2.5–6.0 4.00–7.95 2.5–6.9 4.50–8.95
Two flats (angled) cutting D/2 ≦ KGC ＜ H/2 AG = 1° increments 0 ＜ AG ＜ 360
7
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.5
4
50.00–200.00
Taper Clearance
0 °
KGC
4.5
8
KGC
5
Effective Margin(S) Long
50.00–250.00
20–50
5.5
120 ° 120 °
9
L
(L–S) min.
Three flats cutting at 120° D/2 ≦ KTC ＜ H/2
C ≧ V + 0.5 and C ≦ P–1.0
Short Type
－ 0.1 120 ° 0
50.00–60.00
20 30
6
KTC
L - 3
60.01–
N ≧
6.5
KTC
ESNVF
4
10
and (L–N) ≧ 10
7
7.5
50.00–300.00
11
8 9
20–50
14
L
(L–S) min.
50.00–60.00 60.01–70.00 70.01–80.00
20 30 40 50
C ≧ V + 0.5 and C ≦ P–1.5
2.5–7.9 4.50–9.95
15
8.5
10
80.01–
E Limit of P D = 4–8 c P ≧ V + 1.5, D = 9–10 c P ≧ V + 2.0 ■ Head thickness JIS
V 0.1mm increments
C 0.1mm increments
N 1mm increments
L 0.01mm increments
E P 0.01mm increments
Part Number
S 5mm increments
Cmax.
H T
Type
D
2.0–3.0 3.50–4.95 2.0–3.5 3.50–5.45 2.0–4.0 4.00–5.95
3.5 4.0 4.5 5.0 5.0 5.5 6.0 7.0
5
9
5.5
20–50
10
6
50.00–300.00
6
L
(L–S) min.
C ≧ V + 0.5 and C ≦ P–1.0
4.00–6.45 4.00–6.95
6.5
50.00–60.00
20 30
L - 3
2.0–4.5
11
60.01–
N ≧
7
ESJVF
and (L–N) ≧ 10
2.0–5.0 4.00–7.45 2.5–5.5 5.00–7.95 3.0–6.5 6.00–8.95
12 13 14
7.5
8 9
20–50 (L–S) ≧ 50
70.00–300.00
8
C ≧ V + 0.5 and C ≦ P–1.5
3.5–7.5 6.00–9.95
15
8.0
10
269
270
E Limit of P D = 5–8 c P ≧ V + 1.5, D = 9–10 c P ≧ V + 2.0
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