ROUND CORE PINS FOR BOSS –GAS VENT HOLE TYPE–
E Refer to "Core Sleeves" in D P.427 / P.429 for the shape of boss height 4 mm or more.
– (KC/WKC … etc.)
Part Number – L – P – A – B – V – Tip size (C/R/G)
Type
Alterations
H Hardness HRC
T Tolerance
– 38.00
– A3.00 – B2.50 – V1.50 – C0.3
–G0.3 – RKC3.0
GV–BCVS– CG4 GV–BCHBS–SG6
M Material
Shaft diameter (D) selection type
Shaft diameter (P) designation type
Alteration details D P.365
– 50.00 – P5.70 – A4.00 – B3.00 – V2.50 – G0.5
– TRN
D or P A
B
■ Counterbore Hole Diameters E W dimension is determined depending on V dimension. W V 3 0.80–1.50 4 1.51–2.00 5 2.01–2.50 6 2.51–3.00 7 3.01–4.00 Concave part is applied with electric discharge finishing ( 0.4 ) h = V + (0.2–0.4)
GV–BCHS– □□ GV–BCHBS– □□
0 –0.02 0 –0.01
Alterations Code
Spec.
Alterations Code
Spec.
0 –0.005
±
SKH51 58–60
0.02
GV–BCVS– □□
GV–BCVBS– □□
Full length tolerance alteration L + 0.02 0 c L + 0.01 0
Single flat cutting (DorP)/2 ≦ KC ＜ H/2
LKC
KC
KC － 0.01 0
R ≦ 0.3
L
Head diameter change HC = 0.1 mm increments E (DorP) ≦ HC ＜ H, W + 1.2 ≦ HC E In relation to the diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
About Designation Unit for Key Flat Cutting
WKC Two flats cutting
(DorP)/2 ≦ WKC < H/2
HC
0 － 0.01
WKC
Varied dimension flat cutting (DorP)/2 ≦ KAC ＜ H/2 KBC = 0.1 mm increments only KAC < KBC < H/2
(1) When specifying key flat cutting according to shaft diameter
KAC KBC
＋ 0.02
B
Shape
S
4 0
－ 0.01 KBC 0
Head diameter change (precision) HCC = 0.1 mm increments E (DorP) + 0.5 ≦ HCC < H–0.3
KAC
Select from the following gure
HCC
0 －
6
0.02
＋ 0.02
L
Unit of designation ・ Shaft diameter (D) selection type
0
Two flats (right angled) cutting (DorP)/2 ≦ RKC < H/2
RKC
RKC － 0.01 0
TRN Relief under the head
Shape
(Makes plate chamfering unnecessary)
0.05 mm increments possible
RG
SS
CS
DKC Three flats cutting
・ Shaft diameter (P) designation type 0.005 mm
E Note that finished products may not release if the boss core pin's A/B ratio, material, molding conditions, etc. are inappropriate.
(DorP)/2 ≦ DKC < H/2
0 － 0.01
DKC
DKC
increments possible
R ≦ 0.1
R ≦ 0.1
R ≦ 0.1
B C
B G R
Four flats cutting (DorP)/2 ≦ SKC < H/2
SKC
－ 0.01 SKC 0
(2) When designating arbitrary key flat dimensions
B
E V ≦ A–2G–0.5 E 0.3 ≦ R ≦ 0.5 E 0.25 ≦ G ≦ 1.0 E A ≧ 2G + 0.5
E V ≦ A–0.5 E 0.2 ≦ C ≦ 0.5 E C ≦ {(DorP)–A–0.2}/2
AG °
± 0.5
Two flats (angled) cutting (DorP)/2 ≦ KGC < H/2 AG = 1° increments 0 < AG < 360 Three flats cutting at 120° (DorP)/2 ≦ KTC ＜ H/2
0 °
KGC
Unit of designation 0.1 mm
E V ≦ A–0.5
KGC
CG
SG
120 ° 120 °
－ 0.01 120 ° 0
KTC
■ Unit of designation T Tolerance Unit of designation C ± 0.1 0.05 mm increments
KTC
R ≦ 0.1
G
B G C
■ Characteristics This core pin is appropriate for precisely processing the positioning boss of molding products. The diameter tolerance of the boss is set to 0 –0.02 / 0 –0.01 and a minus side. Because of this, the assembly of the molding product and alignment adjustment can be done easily. By using this product, it is possible to easily adjust the speed and cavity filling pressure of resin during molding when compared to existing products by setting up the gas relief hole function and prevent short shot and gas bake. * Due to decreased filling pressure, breaks and burrs in pins and residual distortion of molding products are reduced.
R ± 0.1 G ± 0.1 B ± 0.02
B
E V ≦ A–2G–0.5 E 0.2 ≦ C ≦ 0.5
E 0.25 ≦ G ≦ 1.0 E A ≧ 2G + 0.5
E V ≦ A–2G–0.5 E 0.25 ≦ G ≦ 1.0 E A ≧ 2G + 0.5 ■ Shaft diameter (D) selection type H S Part Number
0.01 mm increments
E C ≦ {(DorP)–A–0.2}/2
0.01 mm increments
Type
Shape D
L
A
B
V
6
3
3.5 4 4.5 5
Shape SS/CS
SS SG CS CG RG
1.50 ≦ A ≦ D–1
7
0.50 ≦ B ≦ 4.00 and B ≦ 3 × A
0.80 ≦ V ≦ A–0.5
Example
GV–BCHS– GV–BCVS–
10.00–60.00
5
8
Shape SG/CG/RG 0.80 ≦ V ≦ A–2G–0.5
※
Flow of Resin
1.50 ≦ A ≦ D–1.5
9 5.5 6 ■ Shaft diameter (P) 0.01mm designation type H S Part Number
Core Pin for Boss
0.01 mm increments
Core Pin
Type
Shape No.
L
P
A
B
V
3 *
6
2.50–2.99 3.00–3.49 3.50–3.99 4.00–4.49 4.50–4.99 5.00–5.49 5.50–5.99
Shape SS/CS 0.80 ≦ V ≦ A–0.5
3.5
SS SG CS CG RG
1.50 ≦ A ≦ P–1 0.50 ≦ B ≦ 4.00 and B ≦ 3 × A
E pin
7
4
GV–BCHBS– GV–BCVBS–
10.00–60.00
5
4.5
8
5
Shape SG/CG/RG 0.80 ≦ V ≦ A–2G–0.5
1.50 ≦ A ≦ P–1.5
5.5
9
6
E * No.3 c Shape is applicable only to Shape SS/CS.
Part Number
–L–P–A–B–V– C/R/G
Order
(Shaft diameter D selection type)
GV–BCVS– CG4 – 38.00
– A2.50 – B2.50 – V1.50 – C0.5–G0.25
(Shaft diameter P designation type) GV–BCHBS–SG3 – 50.00 – P2.80 – A1.80 – B3.00 – V0.80 – G0.25
Delivery Quotation
425
426
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