SKD61 + Nitriding Concentricity ◎ 0.03 Head thickness 4mm
STRAIGHT EJECTOR SLEEVES –SHAFT DIAMETER SELECTION TYPE/SHAFT DIAMETER DESIGNATION TYPE–
High Speed Steel SKH51 Die Steel SKD61 + Nitriding
Quotation
Delivery
Part Number – L – P – V – C – S – (KC/WKC ... etc.) ESNV–L8 – 200.05 – V4.1 – C4.6 – S32 – KC4.5 ESNVB8 – 150.00 – P7.55 – V4.0 – C5.0 – S32 – KC3.775
Alterations
4mm
Alteration details D P.225
JIS (6/8mm)
Part Number
T D/P Tolerance
T V Tolerance
Applicable center pin shaft diameter tolerance
Alterations Code
Spec.
Alterations Code
Spec.
Shaft diameter designation (0.01mm increments) type
Shaft diameter selection type
T VH7 Tolerance
10mm
Reduces the head thickness to less than standard. TC = 0.1mm increments E 4–TC ≦ Lmax.–L E 2.0 ≦ TC ＜ 4 (Dimensions L and (L–S) remain unchanged) Reduces the head diameter. HC = 0.1mm increments E (D or P) ≦ HC < H E In relation to the head diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
※ Note that for sleeves with V dimension tolerance of H7, combination 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 )
Single flat cutting (D or P)/2 ≦ KC ＜ H/2
V ≦ 3.0 3.1 ≦ V ≦ 6.0 V ≧ 6.1 + 0.010 0 + 0.012 0 + 0.015 0
KC
KC － 0.1 0
0 － 0.02 TC
TC
D(P) –0.01 –0.02
–0.01 –0.02
–0.01 –0.02
ESNV–L ESNVB
H7
4
About Designation Unit and Tolerance for Key Flat Cutting
D(P) 0
Two flats cutting (D or P)/2 ≦ WKC ＜ H/2
–0.005
WKC
0 － 0.1
x 1
b 1
(Range of Guaranteed Shaft-diameter Precision)
WKC
◎ 0.003
HC
Varied width parallel flats cutting (D or P)/2 ≦ KAC ＜ H/2 KBC = 0.1mm increments only KAC ＜ KBC ＜ H/2
◎ 0.005
KAC KBC
(1) To align the key flat with the shaft diameter Unit of designation Shaft diameter (D) selection 0.05mm increments possible Shaft diameter (P) designation 0.005mm increments possible
－ 0.1 0
－ 0.1 0
KAC
KBC
◎ 0.01
R ≦ 0.5
V H7
－ 0.02 － 0.01
φ 0.03
0 － 0.02
T = 4
◎ 0.03
D P or
Two flats (right angled) cutting (D or P)/2 ≦ RKC ＜ H/2
S 0 ＋ 5
－ 5 0
RKC
（ L － S ）
RKC － 0.1 0
◎ 0.06
C = designated dimension
＋ 0.02
＋ 0.05 0
）
0 （ L > 200
L
L
0 –0.1
E The tolerance is
SKD61 + Nitrided
M Material H Hardness
even when (D or P)/2 is designated to fit to the shaft diameter.
Surface: 900HV– Base material: 40 ± 3HRC E b 1 (Range of guaranteed shaft diameter precision) (Details D P.221 ) x 1 max. = 30 Range of guaranteed base material hardness (Details D P.223 ) Range of guaranteed surface hardness for nitriding (Details D P.224 )
Standard
Three flats cutting (D or P)/2 ≦ DKC ＜ H/2
DKC
0 － 0.1
E Nitriding may extend to the head as it is applied after dimension V and P machining. E To insert a stepped center pin with the retention diameter (D) into recess diameter (C) the following condition must be met: the recess diameter (C) ≧ the retention diameter (D) + 1.0 (Details D P.220 )
Total Length Designation
DKC
DKC
(2) To designate arbitrary key flat dimensions Unit of designation 0.1mm
Free Designation Shaft Diameter(P) Total Length Designation
Four flats cutting (D or P)/2 ≦ SKC ＜ H/2
SKC
－ 0.1 SKC 0
■ Shaft Diameter (D) Selection Type
Part Number
L 0.01mm increments
V 0.1mm increments
C 0.1mm increments
S 1mm increments
AG °
± 0.5
H
Cmax.
Two flats (angled) cutting (D or P)/2 ≦ KGC ＜ H/2 AG = 1° increments 0 ＜ AG ＜ 360
Stepped Shape
Type
D
0 °
KGC
4
40.00–200.00
1.5–2.5 1.5–2.5 2.0–3.0 2.0–3.5 2.0–4.0 2.0–4.5 2.0–5.0 2.0–5.5
7
Taper Clearance
KGC
20–50 E When D4, D4.5 (V1.5 -V1.9) 20–40 L
3.0
4.5
8
5
40.00–250.00
3.5 4.0 4.5 5.0 5.5 6.0
Effective Margin(S) Long
120 ° 120 °
5.5
Three flats cutting at 120° (D or P)/2 ≦ KTC ＜ H/2
－ 0.1 120 ° 0
9
KTC
6
(L–S) min.
Short Type
6.5
KTC
40.00–60.00
20 30
10
7
C ≧ V + 0.5
ESNV–L
60.01–
7.5
11
20–50
40.00–300.00
8
2.5–6.0
6.5
L
(L–S) min.
40.00–60.00 60.01–70.00 70.01–80.00
20 30 40 50
9
2.5–7.0
14
7.5
10
2.5–8.0
15
8.5
80.01–
■ Shaft diameter (P) 0.01mm designation type
L 0.01mm increments
P 0.01mm increments
C 0.1mm increments
E V 0.1mm increments
Part Number
S 1mm increments
H
Cmax.
Type
No.
4 40.00–200.00
3.50–3.99 4.01–4.99 5.01–5.49 5.51–5.99 6.01–6.49 6.51–6.99 7.01–7.49
1.5–1.9 2.0–2.5 2.0–3.4 2.0–3.9 2.0–4.4 2.0–4.9 2.0–5.4
20–50 E When No.4, (V1.5 -V1.9) 20–40
7 8
2.5 3.0 4.0 4.5 5.0 5.5 6.0
5
40.00–250.00
5.5
9
C ≧ V + 0.5
6
6.5
L
(L–S) min.
10
40.00–60.00
20 30
7
ESNVB
and
60.01–
7.5
20–50
40.00–300.00
11
8
7.51–7.99
2.5–5.9
6.5
C ≦ P - 1.5
L
(L–S) min.
40.00–60.00 60.01–70.00 70.01–80.00
20 30 40 50
10
8.01–9.99
2.5–7.9
15
8.5
80.01–
E V ≦ P–2.0
Part Number
–L–P–V–C–S
Order
– 200.05
– V4.1 – C5.0 – S32
(D selection type) ESNV–L8 (P selection type) ESNVB8
249
250
– 200.05 – P7.55 – V4.1 – C5.0 – S32
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