Inner Diameter SR B Dimension Designation Type
SKH51 PIN–POINT GATE BUSHINGS INNER DIAMETER SR –B DIMENSION DESIGNATION TYPE– NORMAL TYPE/TIP CORNER ACUTE ANGLE TYPE
SKH51
B
Part Number
L 0.01mm increments
B 0.01mm increments
None for 2A C 0.1mm increments
Enlarged view of the tip
Shape 1A only V 0.1mm increments
Shape 3A only S° 1° increments
Shape 4A only E R 0.1mm increments
( Electro discharge finishing is applied on the SR area. )
Shape 1A
H G SR
P
A° K°
G
SR
＊
Type Shape D
6.3
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
1.6
2 6.00–20.00 0.3 0.4 0.5 ( ＊ 1)
3.00–5.00
0.2–0.4 1.3–1.9
0.4–0.8
3 0.7 0.60
0.2
0.3 0.4 0.5 0.6 ( ＊ 1) 0.5 0.6 0.7 0.8 0.9 ( ＊ 2)
4.00– 6.00 0.2–0.5 1.5–2.4
0.6–1.0
2.5 8.00–25.00
4 1.0 0.75
≦ R 0.2
0 － 0.02
R ≦ 0.2
（ L － C － B ）
B
5.00–9.00 5.00–8.00 5.00–7.00 5.00–30.00 5.00–20.00 5.00–30.00 5.00–20.00 5.00–35.00 5.00–30.00 5.00–30.00 5.00–20.00 5.00–50.00 5.00–40.00 5.00–40.00 5.00–30.00
0
＋ 0.02
D － 0.005
（ L － C ）
C
± 0.05
3
2.0–2.9
5
1.00
0
＊ This bushing has a flat area of 0–0.2 (PGH) 0–0.05(PGHZ) on its tip (P dimension).
P dimension tolerance
Type
1A
L
Eccentricity between D and P is 0.05 or less Eccentricity between D and V is 0.05 or less
PGH
± 0.01 ± 0.02
10.00–40.00
0.6 0.7
0.3–0.8
0.8–1.5
1–45
1.2
1.00
E (L–C–B) ≧ 3.0
PGHZ
4
2.5–3.9
6
2A
＊
Enlarged view of the tip
0.8 0.9 1.0 1.1 1.2
PGH (Normal Type)
( Electro discharge finishing is applied on the SR area. )
Shape 2A
20
1.25
G
SR
6.3
3A
1.6
0.8 0.9 1.0
1.25
PGHZ (Tip Corner Acute Angle Type)
5
3.5–4.9
1.0–2.0
8
0.2
1.2 1.3 1.4 1.5 ( ＊ 3)
(4A) ( ＊ 4)
30
1.50
≦ R 0.2
0 － 0.02
（ L － B ）
B
－ 0.005 0
D
1.0
1.25
＊ This bushing has a flat area of 0–0.2 (PGH) 0–0.05(PGHZ) on its tip (P dimension).
P dimension tolerance
(5A) ( ＊ 4)
＋ 0.02
Type
15.00–60.00
0.5–1.5
4.0–5.9
1–50
1.5–3.0
6
1.5
9
L
0
Eccentricity between D and P is 0.05 or less
PGH
1.2 1.3 1.4 1.5 ( ＊ 3) 1.6 ( ＊ 3)
± 0.01 ± 0.02
1.50
E (L – B) ≧ 3.0
PGHZ
＊
Enlarged view of the tip
Shape 3A
1.2 1.3 1.4
1.50
( Electro discharge finishing is applied on the SR area. )
G
SR
8
5.00–50.00
4.5–7.9
1–60
2.0–4.0
11
6.3
1.6
1.5 1.6
2.00
E For shape 4A, R ≧ (P/2) 2 + C 2 ( ＊ 1) P0.5 (D2)/P0.6 (D2.5) can be selected only for K20°
0.2
( ＊ 3) When P1.5/P1.6 (D5/D6) and K30°, G is 1.2.
≦ R 0.2
( ＊ 2) When P0.9 (D3) and K30°, G is 1.0.
( ＊ 4) Shape ( ) is only for PGH.
0
（ L － C － B ）
B
－ 0.02
－ 0.005 0
＋ 0.05
PartNumber– L – P – A – K – B – CVSR PGH1A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5–V3.0 PGHZ2A4 – 20.01 – P0.8 – A2 – K30 – B15.00 PGHZ3A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5 – S30 PGH4A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5 – R1.0 PGH5A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5
D
（ L － C ）
C
± 0.05
＊ This bushing has a flat area of 0–0.2 (PGH) 0–0.05(PGHZ) on its tip (P dimension).
0
P dimension tolerance
Order
Type
L
Eccentricity between D and P is 0.05 or less
PGH
± 0.01 ± 0.02
E (L–C–B) ≧ 3.0
PGHZ
Enlarged view of the tip
Shape 4A
( Electro discharge finishing is applied on the SR area. )
G
SR
＊
6.3
1.6
■ Features
0.2
Quotation
＜ Enlarged photograph of tip ＞
＜ Enlarged view of the tip ＞
Delivery
≦ R 0.2
0 － 0.02
（ L － C － B ）
B
R
－ 0.005 0
＋ 0.02
D
（ L － C ）
P ± 0.01
C
P ± 0.02
± 0.05
0
C
PartNumber– L – P – A – K – B – CVSR – (CC … etc) PGH1A4 – 20.01 – P0.8 – A2 – K20 – B15.00 – C0.5–V3.0 – CVC0.3
L
Alterations
Eccentricity between D and P is 0.05 or less
＊ This bushing has a flat area of 0–0.2 on its tip (P dimension).
E R ≧ (P/2) 2 +C 2
E (L–C–B) ≧ 3.0
E V2 × R 2 – ( R 2 –(P/2) 2 –C) 2
Alterations Code
Spec.
Enlarged view of the tip
Shape 5A
( Electro discharge finishing is applied on the SR area. )
Tip Corner Acute Angle Type
Tip Corner Acute Angle Type
Normal Type
G
SR
＊
Changes P dimension tolerance. P ± 0.02 c P ± 0.01 E Only applicable for PGHZ.
Normal Type •It has a flat area of 0–0.2mm on its tip.
PKC
6.3
1.6
•P dimension tolerance is ± 0.01. Tip Corner Acute Angle Type • It has a flat area of 0–0.05mm on its tip. • P dimension tolerance is ± 0.02. • With the straight part shorter than the normal type, the gate residual can be suppressed but durability may be decreased. ＜ Normal Type ＞ ＜ Tip Corner Acute Angle Type ＞ Molding
C ± 0.1
0.2
Machining (C chamfering) for inlay relief. D2/2.5 → C0.2 D3/4 → C0.3 D5–8 → C0.5 Machining (C chamfering) for inlay relief. CVC = 0.1mm increments 0.2 ≦ CVC ＜ (H–D) 2 −0.1
CC
R ≦ 0.2
0
（ L － C － B ）
B
－ 0.02
B
－ 0.005 0
＋ 0.05
D
L （ L － C ）
C
± 0.05
0
CVC ± 0.05
C
Eccentricity between D and P is 0.05 or less
＊ This bushing has a flat area of 0–0.2 on its tip (P dimension).
CVC
E (L–C–B) ≧ 3.0
B
Part Number PGH □ A PGHZ □ A
M Material
H Hardness
＊ α≒ 2SR + 2(L–G–SR)tan A° 2
● Calculation for the inlet diameter ＊ α
G
SR
SR
G
SKH51
59–61HRC
L
L
E The dimension acquired using the above calculation is the theoretical (reference) value.
749
750
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