Inner Diameter Tapered B Dimension Designation Type
PIN–POINT GATE BUSHINGS INNER DIAMETER TAPERED – B DIMENSION DESIGNATION TYPE – NORMAL TYPE/TIP CORNER ACUTE ANGLE TYPE
SKH51
SKH51
B
E The inside diameter is finished by electric discharge. E The angle (K°) and the secondary sprue (A°) are roundly connected.
Part Number
L 0.01mm increments
B 0.01mm increments
Shape 1A
Enlarged view of the tip
None for 2A C 0.1mm increments
Shape 1A only V 0.1mm increments
Shape 3A only S° 1° increments
Shape 4A only E R 0.1mm increments
G
＊
H G
P
A° K°
Type Shape D
6.3
1.6
1 20 30 2 3
2.5 8.00–25.00 0.3 0.4 0.5 0.6 ( ＊ 1)
4.00– 6.00 0.2–0.5 1.5–2.4
0.6–1.0
4 1.0
0.2
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
5.00–9.00 5.00–8.00 5.00–7.00 5.00–30.00 5.00–20.00 5.00–35.00 5.00–30.00 5.00–20.00 5.00–30.00 5.00–20.00 5.00–50.00 5.00–35.00 5.00–40.00 5.00–30.00
20 30 40
0.5 0.6 0.7 0.8 ( ＊ 2)
≦ R 0.2
2.0–2.9
3
5
0 － 0.02
R ≦ 0.2
（ L － C － B ）
B
0.3–0.8
0.8–1.5
10.00–40.00
1.2
0
＋ 0.02
D － 0.005
（ L － C ）
C
0.6 0.7 0.8 0.9 1.0
± 0.05
0
4
2.5–3.9
1–45
6
＊ This bushing has a flat area of 0–0.2 (PGHV) 0–0.05(PGHVZ) on its tip (P dimension).
1A
P dimension tolerance
Type
L
Eccentricity between D and P is 0.05 or less Eccentricity between D and V is 0.05 or less
PGHV
± 0.01 ± 0.02
PGHV (Normal Type) PGHVZ (Tip Corner Acute Angle Type)
2A
E (L–C–B) ≧ 3.0
PGHVZ
0.8 0.9 1.0
5
3.5–4.9
1.0–2.0
8
Enlarged view of the tip
3A
Shape 2A
＊
1.1 1.2 ( ＊ 3) 1.3 ( ＊ 3) 1.4 ( ＊ 3)
G
20 30 40 50 60
(4A) ( ＊ 5)
6.3
1.6
1.0
1.5
15.00–60.00
0.5–1.5
6
4.0–5.9 1–50 1.5–3.0
9
0.2
(5A) ( ＊ 5)
1.1 1.2 1.3 1.4 1.5 ( ＊ 4) 1.6 ( ＊ 4) 1.2 1.3 1.4 1.5 1.6 1.2 1.3 1.4 1.5 1.6
≦ R 0.2
0 － 0.02
（ L － B ）
B
－ 0.005 0
D
8
4.5–7.9
2.0–4.0
11
＊ This bushing has a flat area of 0–0.2 (PGHV) 0–0.05(PGHVZ) on its tip (P dimension).
P dimension tolerance
Type
0 ＋ 0.02
5.00–50.00
1–60
L
Eccentricity between D and P is 0.05 or less
PGHV
± 0.01 ± 0.02
10
5.0–9.9
2.5–5.0
13 2.0
Shape 3A E (L – B) ≧ 3.0
PGHVZ
Enlarged view of the tip
E For shape 4A, R ≧ (P/2) 2 + C 2 ( ＊ 1) P0.6 (D2.5) can be selected only for K20° ( ＊ 2) P0.8 (D3) is selected from K20°/K30° ( ＊ 3) P1.2–P1.4 (D5) cannot be selected only for K60°
＊
( ＊ 4) When P1.5/P1.6 (D6) and K30° or more, G is 1.2.
G
( ＊ 5) Shape ( ) is only for PGHV.
6.3
1.6
PartNumber– L – P – A – K – B – CVSR PGHV1A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5–V3.0 PGHVZ2A4 – 20.01 – P0.8 – A2 – K30 – B15.00 PGHVZ3A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5 – S30 PGHV4A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5 – R1.0 PGHV5A4 – 20.01 – P0.8 – A2 – K30 – B15.00 – C0.5
0.2
Order
≦ R 0.2
0 － 0.02
（ L － C － B ）
B
－ 0.005 0
0 ＋ 0.05
D
（ L － C ）
C
± 0.05
＊ This bushing has a flat area of 0–0.2 (PGHV) 0–0.05(PGHVZ) on its tip (P dimension).
P dimension tolerance
Type
L
Eccentricity between D and P is 0.05 or less
PGHV
± 0.01 ± 0.02
E (L–C–B) ≧ 3.0
PGHVZ
■ Features ＜ Enlarged photograph of tip ＞
Enlarged view of the tip
Shape 4A
Quotation
Delivery
＜ Enlarged view of the tip ＞
G
＊
6.3
1.6
P ± 0.01
P ± 0.02
PartNumber– L – P – A – K – B – CVSR – (CC … etc.) PGHV1A4 – 20.01 – P0.8 – A2 – K20 – B15.00 – C0.5–V3.0 – CVC0.3
0.2
Alterations
≦ R 0.2
0 － 0.02
（ L － C － B ）
B
R
Alterations Code
Spec.
－ 0.005 0
0 ＋ 0.02
D
（ L － C ）
C
± 0.05
C
Tip Corner Acute Angle Type
Tip Corner Acute Angle Type
Normal Type
Changes P dimension tolerance. P ± 0.02 c P ± 0.01 E Only applicable for PGHVZ.
L
Eccentricity between D and P is 0.05 or less
PKC
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
Normal Type • It has a flat area of 0–0.2mm on its tip. • 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.
E R ≧ (P/2) 2 +C 2
E (L–C–B) ≧ 3.0
E V = 2 × R 2 – ( R 2 –(P/2) 2 –C) 2
C ± 0.1
Machining (C chamfering) for inlay relief. D2.5 → C0.2 D3/4 → C0.3 D5–10 → C0.5 Machining (C chamfering) for inlay relief. CVC = 0.1mm increments 0.2 ≦ CVC ＜ (H–D) 2 −0.1
Enlarged view of the tip
Shape 5A
G
＊
CC
6.3
1.6
B
• 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
CVC ± 0.05
0.2
CVC
R ≦ 0.2
0 － 0.02
（ L － C － B ）
B
B
－ 0.005 0
0 ＋ 0.05
D
（ L － C ）
C
± 0.05
C
L
Eccentricity between D and P is 0.05 or less
*This bushing has a flat area of 0–0.2 on its P dimension tip.
E (L–C–B) ≧ 3.0
Part Number
M Material
H Hardness
＊ α≒ 2{(L−G)tan A°
K° 2 } + P
● Calculation for the inlet diameter ＊ α
2 + Gtan
PGHV □ A PGHVZ □ A
G
G
SKH51
59–61HRC
L
L
E The dimension acquired using the above calculation is the theoretical (reference) value.
751
752
Powered by FlippingBook