Inner Diameter SR B Dimension Selection Type
SKH51 PIN-POINT GATE BUSHINGS INNER DIAMETER SR −B DIMENSION SELECTION TYPE− NORMAL TYPE/TIP CORNER ACUTE ANGLE TYPE
SKH51
B
L 0.01mm Increments
Shape 1A
Part Number
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
Enlarged view of the tip
H G B SR
P
A° K°
＊
G
( Electro discharge finishing is applied on the SR area. )
SR
Type Shape D
6.3
1.6
0.2–0.4 1.3–1.9
0.4–0.8
2 6.00–20.00 0.3 0.4 0.5 ( ＊ 1)
3 0.7 3 0.60
1A
0.2
2.5 8.00–25.00 0.3 0.4 0.5 0.6 ( ＊ 1)
0.2–0.5 1.5–2.4
0.6–1.0
4 1.0 4 0.75
1
PGHB (Normal Type)
≦ 0.2
2A
R
0.5 0.6 0.7 0.8 0.9 ( ＊ 2)
R ≦ 0.2
（ L － C － B ）
0 －
2.0–2.9
3
1–45
5
1.00
B
0.02
＋ 0.02
0
10.00–40.00
0.3–0.8
0.8–1.5
1.2 6
（ L － C ）
20 30
D － 0.005
＊ This bushing has a flat area of 0–0.2 (PGHB) 0–0.05 (PGHBZ) on its tip (P dimension).
P dimension tolerance
± 0.05
0.6 0.7
C
1.00 1.25 1.25 1.50 1.25 1.50 1.50 2.00
3A
Type
0
2
4
2.5–3.9
6
0.8 0.9 1.0 1.1 1.2
PGHBZ (Tip Corner Acute Angle Type)
PGHB
± 0.01 ± 0.02
L
Eccentricity between D and P is 0.05 or less. Eccentricity between D and V is 0.05 or less
0.8 0.9 1.0
PGHBZ
3.5–4.9
1.0–2.0
5
8
(4A) ( ＊ 4)
1.2 1.3 1.4 1.5 ( ＊ 3)
3
Shape 2A
1.0
＊
Enlarged view of the tip
15.00–60.00
0.5–1.5
6
4.0–5.9
1–50
1.5–3.0
1.5 10
9
1.2 1.3 1.4 1.5 ( ＊ 3) 1.6 ( ＊ 3)
G
SR
( Electro discharge finishing is applied on the SR area. )
(5A) ( ＊ 4)
1.2 1.3 1.4
6.3
8
4.5–7.9
1–60
2.0–4.0
11
1.5 1.6
1.6
E For shape 4A, R ≧ (P/2) 2 + C 2 ( ＊ 1) P0.5 (D2) and 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.
≦ 0.2
R
( ＊ 2) When P0.9 (D3) and K30°, G is 1.0.
( ＊ 4) Shape ( ) is only for PGHB.
（ L － B ）
0 －
B
0.02
－ 0.005 0
PartNumber - L - P - A - K - CVSR PGHB1A4 - 20.01 - P0.8 - A2 - K30 - C0.5-V3.0 PGHBZ2A4 - 20.01 - P0.8 - A2 - K30 PGHBZ3A4 - 20.01 - P0.8 - A2 - K30 - C0.5 - S30 PGHB4A4 - 20.01 - P0.8 - A2 - K30 - C0.5 - R1.0 PGHB5A4 - 20.01 - P0.8 - A2 - K30 - C0.5
D
＊ This bushing has a flat area of 0–0.2 (PGHB) 0–0.05 (PGHBZ) on its tip (P dimension).
P dimension tolerance
Type
Order
＋ 0.02
PGHB
L
± 0.01 ± 0.02
0
Eccentricity between D and P is 0.05 or less
PGHBZ
Shape 3A
＊
Enlarged view of the tip
( Electro discharge finishing is applied on the SR area. )
G
SR
■ Features
6.3
1.6
Quotation
Delivery
＜ Enlarged photograph of tip ＞
＜ Enlarged view of the tip ＞
0.2
≦ 0.2
PartNumber - L - P - A - K - CVSR - (CC/CVC … etc.) PGHB1A4 - 20.01 - P0.8 - A2 - K20 - C0.5-V3.0 - CVC0.3
R
0 （ L － C － B ） －
Alterations
P ± 0.01
B
P ± 0.02
0.02
＋ 0.05
－ 0.005 0
（ L － C ）
＊ This bushing has a flat area of 0–0.2 (PGHB) 0–0.05 (PGHBZ) on its tip (P dimension).
D
P dimension tolerance
± 0.05
C
Type
0
Alterations Code
Spec.
PGHB
± 0.01 ± 0.02
L
Eccentricity between D and P is 0.05 or less
PGHBZ
Changes P dimension tolerance. P ± 0.02 c P ± 0.01 E Only applicable for PGHBZ.
PKC
Shape 4A
Tip Corner Acute Angle Type
Tip Corner Acute Angle Type
Normal Type
Enlarged view of the tip
G
＊
SR
( Electro discharge finishing is applied on the SR area. )
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.
6.3
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
C ± 0.1
1.6
CC
0.2
B
≦ 0.2
R
CVC ± 0.05
（
0 L － C － B ） － 0.02
R
B
• With the straight part shorter than the normal type, the gate residual can be suppressed but durability may be de- creased.
CVC
＋ 0.02
－ 0.005 0
C
（ L － C ）
D
± 0.05
C
0
B
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
L
Eccentricity between D and P is 0.05 or less
E V = 2 ×
E R ≧ (P/2) 2 + C 2
( R 2 − (P/2) 2 − C ) 2 R 2 −
＜ Tip Corner Acute Angle Type ＞
＜ Normal Type ＞
Shape 5A
Enlarged view of the tip
Molding
G
＊
( Electro discharge finishing is applied on the SR area. )
SR
6.3
1.6
0.2
≦ 0.2
R
0 （ L － C － B ） －
B
0.02
＋ 0.05
－ 0.005 0
（ L － C ）
C
D
± 0.05
C
0
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
L
Eccentricity between D and P is 0.05 or less
＊ α≒ 2SR + 2(L−G−SR)tan A° 2
● Calculation for the inlet diameter ＊α
Part Number
M Material
H Hardness
PGHB □ A PGHBZ □ A
G
SR
SR
G
SKH51
59–61HRC
L
L
E The dimension acquired using the above calculation is the theoretical (reference) value.
745
746
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