Precision
High Speed Steel SKH51
PRECISION RECTANGULAR EJECTOR PINS – N DIMENSION SHORT TYPE –
P/W 0
–0.005 Free designation
Part Number – L – P – W – N – (AKC/AWC … etc.) ERVSF 1.5 – 100.00 – P1.20 – W0.30 – N20 – AWC 0
High Speed Steel SKH51
Alterations
Quotation
Dies Steel SKD61 + Nitrided
Alteration details D P.167
Alterations
Code
Spec.
Alterations
Code
Spec.
Head diameter change HC = 0.1mm increments E D + 1 ≦ HC < H
Key flat cutting (precision) VAK = 45° increments E 0 ≦ VAK < 360 X Combination with KSA/WSA not available Two parallel flats cutting (Precision) VAW = 45° increments E 0 ≦ VAW < 360 X Combination with KSA/WSA not available Key flat cutting (angled) AKC = 1° increments E 0 ≦ AKC < 360 E When combined with KSA/WSA, 90° increments only. Two parallel flats cutting (angled) AWC = 1° increments E 0 ≦ AWC < 360 E When combined with KSA/WSA, 90° increments only. Two right angled flats cutting (angled) ARC = 1° increments E 0 ≦ ARC < 360 E When combined with KSA/WSA, 90° increments only. Three flats cutting (angled) ADC = 1° increments E 0 ≦ ADC < 360 E When combined with KSA/WSA, 90° increments only.
0 °
0 °
HC
4mm
VAK
90 °
270 °
180 ° 0 °
JIS (6/8mm)
Head diameter change (precision) HCC = 0.1mm increments E D + 1 ≦ HCC < H–0.3
Part Number
Head Thickness T P/W Tolerance ance
HCC
0 °
ERVSF
4mm (T4)
VAW
P/W 0
0 –0.005
270 °
90 °
Head thickness change TC = 0.1mm increments E T/2 ≦ TC < T (Dimensions L and N remain unchanged) E T–TC ≦ Lmax.–L Dowel hole boring NC = 90° increments E Available when H ≧ 4 X Combination with other than NHC/NHN/TMC not available Range of designation/Designation method/ Details of standards: D P.167 Dowel hole + Spring pin driving NCW = 90° increments E Available when H ≧ 4 X Combination with other than NHC/NHN/TMC not available Range of designation/Designation method/ Details of standards: D P.167 Numbering on the head Range of designation/Designation method: D P.168 Automatic sequential numbering on the head Range of designation/Designation method: D P.168
–0.01
ERVSJF
4/6/8mm (JIS)
180 °
－ 0.02 TC 0
TC
P/W 0
–0.02
0 °
0 °
T
R ≦ 0.5
AKC
P/W 0
90 °
270 °
（ D ≦ 2 R ≦ 0.3 ）
Step R
–0.005
0 °
180 °
0 °
2 W ＋ K P = P ≧ W
P/W 0
NC
–0.003
90 °
270 °
0 °
0 °
2
AWC
180 °
Standard size
270 °
90 °
0
－ 0.005 0
－ 0.02
T
P
180 °
＋ 5 0
（ L － N ）
0
Total Length Designation Free designation
M Material SKH51 H Hardness 58–60HRC Range of guaranteed retention diameter (D) precision/base material hardness/Step R (Details D P.165 )
－ 5
N
0 °
0 °
＋ 0.02
＋ 0.05 0
0 °
0 °
）
0 （ L ＞ 200
L
L
ARC
270 °
90 °
NCW
90 °
270 °
180 °
180 °
Head thickness JIS
Head thickness 4mm
N dimension short
0 °
0 °
Part Number
0.01mm increments
ADC
N 1mm increments
270 °
90 °
Angular pin
Kmax.
Nmin.
5 2 3
NHC
Head thickness 4mm
Head thickness JIS
180 °
5
H T H T
D
L
P
W
Rectangular R dimension
0 °
Two flats cutting (angled) KGA = 1° increments E 0 < KGA < 360
1
2
3
1.5
0.60– 1.30 0.80– 1.80 1.00– 2.30 1.00– 2.80 1.20– 3.30 1.50– 3.80 1.50– 4.30 1.80– 4.80 2.00– 5.30 2.00– 5.80 2.50– 6.30 2.50– 6.80 3.00– 7.80
KGA
1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9 6.4 6.9 7.9 9.9
3 4 5 6
3 4 5 6 7
Tip process
NHN
90 °
0.30–
20
270 °
2
180 °
Caulking type
10 ≦ (L – N) ≦ 80
2.5
40.00–100.00
23
4
90 °
0.40–
Two flats cutting (angled) KGD = 1° increments E 0 < KGD < 360 E Pay attention to the standard position of 0°.
TMC Lapping on the tip face
3
X Not available for L–N ≦ 31
0 °
25
L
KGD
180 °
Rectangular shank
3.5
D/2
7
Total length tolerance alteration L + 0.02 0 c + 0.01 0 E Available when L ≦ 200
4
270 °
LKC
10 ≦ (L – N) ≦ 90
40.00–120.00
8
27
D shaped
L
4.5
0.50–
ERVSF (Head thickness 4mm) ERVSJF (Head thickness JIS)
Shoulder cutting (1 plate) KSA = 0.1mm increments E W/2 + 0.1 ≦ KSA ≦ D/2–0.1 Shoulder cutting (2 parallel plates) WSA = 0.1mm increments E W/2 + 0.1 ≦ WSA ≦ D/2–0.1
8
4
5
KSA
Blade edge shape
Tapping D8 c M4 D10 c M5 D12/15 c M6 E Only available combination is with CSW/CSF/TMC X Not available for ERVSF E Available when D ≧ 8
MC
29
9
5.5
6
9
MC
6
10
31
M × 1
10 ≦ (L – N) ≦ 120
6.5
50.00–150.00
WSA
0.60–
10
11
7 8
(C recess processing at 2 points on top)
CSW, CSF: Range of designation W CSW, CSF 1.0 ≦ W < 1.5 0.3
2 － CSW R
11 15
13 15 17 20
C chamfering processing at 2 points on top (except tip) for relief is performed. Designation method CSW1 – E25
35
10
3.00– 9.80 0.80–
8
CSW
12 50.00–200.00 4.00–11.80 1.00– 15 50.00–250.00 5.00–14.80 1.50–
11.9 14.9
10 ≦ (L – N) ≦ 215
–
– –
0.5 1 1.5
＋ 5 0
W ≧ 1.5
P
(C processing range)
E
N
E Designate P/W dimensions within the Kmax. K = P 2 + W 2
E P ≧ W
E P ≧ 1.5 E CSW, CSF < W/2 E = 1mm increments E 5 ≦ E ≦ (L–N)–20
(C recess at 4 points)
4 － CSF R
Precision Standard
PartNumber – L – P – W – N ERVSF 1.5 – 100.00 – P1.20 – W0.30 – N20
C chamfering processing at 4 points (except tip) for relief is performed. Designation method CSF0.5 – E30
Order
Pmin. Pmax.
CSF
Squareness of the tip corner
W plane as the base (Pmax. – Pmin.) ≦ 0.01
＋ 5 0
Quotation
P
(C processing range)
E
Delivery
N
Rmax. ≦ 0.03 (deburring R) E The tip corners have been slightly trimmed to measure the P/W dimensions. (Details D P.166 )
Rmax.
Corner R value of the tip corner
■ Step R of Rectangular Ejector Pins –N dimension short type– For N short type, Step R becomes smaller comparing with that of conventional rectangular ejector pin.
• Step radius: R65–95 ＊
( ＊ The size of step R is determined by the size of the grindstone used to process it. This is not a guaranteed value for R.)
Step R
• Formula used for calculating the length (a 1 ) and (a 2 ) of Step R:
D−W 2 D−P 2
D−W 2 D−P 2
a 2 ± 3
P D
a 1 = 5 +
× (2R−
)
＊ The left formulas
a 1 ± 3
include profile error from rough and finish processing.
（ L － N ）
－ 5 0
N
a 2 = 5 +
× (2R−
)
L
179
180
• Concentricity of rectangular tip (P/W) and retention diameter (D): 0.2mm or less
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