Inner Diameter SR Large K° Type
PIN–POINT GATE BUSHINGS INNER DIAMETER SR – LARGE K° TYPE – NORMAL TYPE/TIP CORNER ACUTE ANGLE TYPE
SKH51
SKH51
L 0.01mm increments
B 0.01mm increments
Shape 1A
Part Number
Enlarged view of the tip
None for 2A C 0.1mm increments
Shape 3A only S 1° increments
Shape 1A only V 0.1mm increments
Shape 4A only E R 0.1mm increments
( Electro discharge finishing is applied on the SR area. )
H SR
P G A° K°
G
SR
＊
Type Shape D
6.3
0.8 1.0 1.2 0.8 1.0 1.2 0.8 1.0 1.2 1.5 0.8 1.0 1.2 1.5 0.8 1.0 1.2 0.8 1.0 0.8 1.0 1.2 1.5 0.8 1.0 1.2 1.5 0.8 1.0 1.2 1.5
1.25 1.25 1.50 1.25 1.50 1.50 1.75 2.00 2.00 2.25 1.75 2.00 2.25 2.50 2.00 2.25 2.50 2.25 2.50 2.00 2.25 2.50 2.75 2.25 2.50 2.75 3.00 2.50 2.75 3.00 3.25
1.6
20 30 40 50
0.5
0.2
6
4.0–5.9
1–50
1.5–3.0
9
≦ R 0.2
R ≦ 0.2
0.6
0 － 0.02
（ L － C － B ）
B
0
＋ 0.02
D
（ L － C ）
－ 0.005
＊ This bushing has a flat area of 0–0.2 (PGHF) 0–0.05(PGHFZ) on its tip (P dimension).
C
P dimension tolerance
± 0.05
0
Type
1 A
L
PGHF
± 0.01 ± 0.02
Eccentricity between D and P is 0.05 or less Eccentricity between D and V is 0.05 or less
0.8
1
PGHFZ
E (L–C–B) ≧ 3.0
Shape 2A
Enlarged view of the tip
2A
＊
( Electro discharge finishing is applied on the SR area. )
G
SR
1.0
8
4.5–7.9
2.0–4.0
11
PGHF (Normal Type)
20
6.3
1.6
3A
0.2
1.2
2
15.00–40.00
5.00–20.00 0.5–1.5
30
PGHFZ (Tip Corner Acute Angle Type)
≦ R 0.2
0 － 0.02
（ L － B ）
B
1.4
－ 0.005 0
40
1–60
D
(4A) ＊
＊ This bushing has a flat area of 0–0.2 (PGHF) 0–0.05(PGHFZ) on its tip (P dimension).
P dimension tolerance
Type
＋ 0.02
L
0
Eccentricity between D and P is 0.05 or less
PGHF
± 0.01 ± 0.02
1.2
50
Shape 3A E (L – B) ≧ 3.0
PGHFZ
3
(5A) ＊
Enlarged view of the tip
＊
( Electro discharge finishing is applied on the SR area. )
60
G
SR
10
5.0–9.9
2.5–5.0
1.4
13
6.3
1.6
0.2
1.6
≦ R 0.2
0 － 0.02
（ L － C － B ）
B
－ 0.005 0
＋ 0.05
E For shape 4A, R ≧ (P/2) 2 + C 2
D
（ L － C ）
( ＊ ) Shape ( ) is only for PGHF.
C
＊ This bushing has a flat area of 0–0.2 (PGHF) 0–0.05(PGHFZ) on its tip (P dimension).
± 0.05
P dimension tolerance
0
Type
L
Eccentricity between D and P is 0.05 or less
PGHF
± 0.01 ± 0.02
PartNumber– L – P – G – A – K – B –CVSR PGHF1A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 – C0.5–V6.0 PGHFZ2A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 PGHFZ3A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 – C0.5–S30 PGHF4A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 – C0.5–R3.0 PGHF5A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 – C0.5
Order
PGHFZ
E (L–C–B) ≧ 3.0
Enlarged view of the tip
Shape 4A
G
( Electro discharge finishing is applied on the SR area. )
SR
＊
6.3
1.6
0.2
■ Features ＜ Enlarged photograph of tip ＞
Quotation
Delivery
≦ R 0.2
＜ Enlarged view of the tip ＞
0
（
L － C － B ） － 0.02
B
R
－ 0.005 0
＋ 0.02
C
D
（ L － C ）
C
± 0.05
0
PartNumber– L – P – G – A – K – B –CVSR –(CC … etc.) PGHF1A8 – 20.01 – P0.8 – G1.0 – A2 – K50 – B15.00 – C0.5–V6.0 – CC
L
Alterations
Eccentricity between D and P is 0.05 or less
P ± 0.01
P ± 0.02
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
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
Alterations Code
Spec.
Enlarged view of the tip
Shape 5A
( Electro discharge finishing is applied on the SR area. )
Changes P dimension tolerance. P ± 0.02 c P ± 0.01 E Only applicable for PGHFZ.
G
SR
＊
PKC
Tip Corner Acute Angle Type
Tip Corner Acute Angle Type
Normal Type
6.3
1.6
Normal Type • It has a flat area of 0–0.2mm on its tip.
C0.5 ± 0.1
0.2
• 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
CC
Machining (C chamfering) for inlay relief.
R ≦ 0.2
0
（ L － C － B ）
B
－ 0.02
B
－ 0.005 0
＋ 0.05
C
D
（ L － C ）
C
± 0.05
CVC ± 0.05
Machining (C chamfering) for inlay relief. CVC = 0.1mm increments 0.2 ≦ CVC ＜ (H–D) 2 −0.1
0
＊ This bushing has a flat area of 0–0.2 on its P dimension tip.
L
CVC
Eccentricity between D and P is 0.05 or less
E (L–C–B) ≧ 3.0
B
＊ α≒ 2SR + 2(L–G–SR)tan A° 2
● Calculation for the inlet diameter ＊ α
Part Number
M Material
H Hardness
PGHF □ A PGHFZ □ A
G
SR
SR
G
SKH51
59–61HRC
L
L
E The dimension acquired using the above calculation is the theoretical (reference) value.
755
756
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