Inner Diameter SR D Dimension Designation Type
SKH51 PIN–POINT GATE BUSHINGS INNER DIAMETER SR – D DIMENSION DESIGNATION TYPE – NORMAL TYPE/TIP CORNER ACUTE ANGLE TYPE
SKH51
Part Number
L 0.01mm increments
B 0.01mm increments
D 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
H G SR
P A° K°
( Electro discharge finishing is applied on the SR area. )
G
SR
＊
Type Shape No.
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
1.6
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
2.5 8.00–25.00 2.51–3.00
4 1.0 0.75
0.2
5.00–9.00 5.00–8.00 5.00–7.00
0.5 0.6 0.7 0.8 0.9 ( ＊ 2)
3
2.0–2.9
3.01–4.00
≦ R 0.2
5
1.00
0 － 0.02
R ≦ 0.2
（ L － C － B ）
B
0
＋ 0.02
D
（ L － C ）
－ 0.005
C
± 0.05
5.00–30.00
＊ This bushing has a flat area of 0–0.2 (PGHD) 0–0.05(PGHDZ) on its tip (P dimension).
0
P dimension tolerance
0.6 0.7
Type
0.3–0.8
0.8–1.5
10.00–40.00
1.2
1.00
L
5.00–20.00
PGHD
± 0.01 ± 0.02
Eccentricity between D and P is 0.05 or less Eccentricity between D and V is 0.05 or less
2.5–3.9
4
4.01–5.00
1–45
6
1A
PGHDZ
0.8 0.9 1.0 1.1 1.2
E (L–C–B) ≧ 3.0
5.00–30.00
1.25
20
Shape 2A
5.00–20.00 5.00–35.00
Enlarged view of the tip
PGHD (Normal Type)
2A
＊
( Electro discharge finishing is applied on the SR area. )
G
SR
0.8 0.9 1.0
1.25
5.00–30.00
6.3
3A
1.6
5.01–7.00
3.5–4.9
1.0–2.0
5
8
PGHDZ (Tip Corner Acute Angle Type)
1.2 1.3 1.4 1.5 ( ＊ 3)
5.00–30.00
1.50
(4A) ( ＊ 4) (5A) ( ＊ 4)
0.2
5.00–20.00
≦ R 0.2
5.00–50.00
30
0 － 0.02
（ L － B ）
1.0
1.25
B
0
5.00–40.00
D
－ 0.005
15.00–60.00
0.5–1.5
4.0–4.9 1–50 1.5–3.0
6
6.01–8.00
1.5
9
＊ This bushing has a flat area of 0–0.2 (PGHD) 0–0.05(PGHDZ) on its tip (P dimension).
P dimension tolerance
Type
1.2 1.3 1.4 1.5 ( ＊ 3) 1.6 ( ＊ 3)
5.00–40.00
＋ 0.02
1.50
L
PGHD
Eccentricity between D and P is 0.05 or less
± 0.01 ± 0.02
0
5.00–30.00
Shape 3A E (L – B) ≧ 3.0
PGHDZ
1.2 1.3 1.4
Enlarged view of the tip
1.50
＊
( Electro discharge finishing is applied on the SR area. )
5.00–50.00
4.5–7.9 1–60 2.0–4.0
8
8.01–10.00
11
G
SR
1.5 1.6
2.00
6.3
1.6
E For shape 4A, R ≧ (P/2) 2 + C 2 ( ＊ 1) P0.6 (No.2.5) can be selected only for K20° ( ＊ 2) When P0.9 (No.3) and K30°, G is 1.0.
0.2
( ＊ 3) When P1.5/P1.6 (No.5/No.6) and K30°, G is 1.2.
( ＊ 4) Shape ( ) is only for PGHD.
≦ R 0.2
0 － 0.02
（ L － C － B ）
B
PartNumber–L–D–P–A–K–B–CVSR PGHD1A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 – C0.5–V2.9 PGHDZ2A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 PGHDZ3A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 – C0.5 – S30 PGHD4A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 – C0.5 – R1.0 PGHD5A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 – C0.5
0
＋ 0.05
＊ This bushing has a flat area of 0–0.2 (PGHD) 0–0.05(PGHDZ) on its tip (P dimension).
D
P dimension tolerance
（ L － C ）
－ 0.005
C
± 0.05
Order
Type
0
PGHD
± 0.01 ± 0.02
L
Eccentricity between D and P is 0.05 or less
PGHDZ
E (L–C–B) ≧ 3.0
Shape 4A
Enlarged view of the tip
( Electro discharge finishing is applied on the SR area. )
G
SR
＊
6.3
1.6
■ Features ＜ Enlarged photograph of tip ＞ ＜ Enlarged view of the tip ＞
Quotation
Delivery
0.2
≦ R 0.2
0
（
L － C － B ） － 0.02
B
R
Part Number –L–D–P–A–K–B–CVSR–(CC … etc.) PGHD1A3 – 20.01 – D3.50 – P0.8 – A2 – K30 – B5.00 – C0.5–V2.9 – CC
P ± 0.01
P ± 0.02
0
＋ 0.02
Alterations
D
（ L － C ）
－ 0.005
C
± 0.05
0
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.
Alterations Code
Spec.
E For shape 4A, R ≧ (P/2) 2 + C 2
E V = 2 × R 2 –( R 2 –(P/2) 2 –C) 2
E (L–C–B) ≧ 3.0
Changes P dimension tolerance. P ± 0.02 c P ± 0.01 E Only applicable for PGHDZ.
Tip Corner Acute Angle Type
Tip Corner Acute Angle Type
Normal Type
Shape 5A
Enlarged view of the tip
PKC
Normal Type • It has a flat area of 0–0.2mm on its tip.
( Electro discharge finishing is applied on the SR area. )
G
SR
＊
• 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
6.3
1.6
C ± 0.1
Machining (C chamfering) for inlay relief. No. 2.5 → C0.2 No. 3/4 → C0.3 No. 5–8 → C0.5 Machining (C chamfering) for inlay relief. CVC = 0.1mm increments 0.2 ≦ CVC ＜ (H–D) 2 −0.1
CC
0.2
B
R ≦ 0.2
（ L － C － B ） 0
CVC ± 0.05
B
－ 0.02
0
＋ 0.05
D
（ L － C ）
CVC
－ 0.005
C
± 0.05
0
C
L
B
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
Eccentricity between D and P is 0.05 or less
E (L–C–B) ≧ 3.0
＊ α≒ 2SR + 2(L–G–SR)tan A° 2
● Calculation for the inlet diameter ＊ α
Part Number
M Material
H Hardness
PGHD □ A PGHDZ □ A
G
SR
SR
G
SKH51
59–61HRC
L
L
E The dimension acquired using the above calculation is the theoretical (reference) value.
753
754
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