High Speed Steel SKH51
CORE PINS WITH GAS FILTER -NORMAL TYPE/TIP PROCESSING TYPE-
■ About tip processing type • Ejector pins with gas vent filter ( d P.455 ) and core pins with gas filter ( d P.457 ) are tip processing type, which allows the tip to be shaped. • Because the total length of the filter part is long and the processing margin is 3mm, it can be shaped and installed according to the molded product within this range.
Enlarged filter section
Processing example
GVFC (Normal/Medium flow rate) GVFCM (Normal/Large flow rate) GVFCA (For tip processing/Medium flow rate) GVFCAM (For tip processing/Large flow rate)
＋ 0.02 0
b 1 (Range of guaranteed shaft diameter precision)
x 1
（ 0.1 ）
L
Details of filter end face
（ C0.1 ）
Cross section Pattern diagram
R ≦ 0.3
0 － 0.02
ℓ
T ＝ 4
Assembly holes
＋ 0.02 0
－ 0.01 － 0.02
Red frame: Image of processing margin range
L
P
Details of ventilation groove
（ G ）
Components
M Material
H Hardness
x 1 max. = 8 x 1 Shaft diameter tolerance: P Operating temperature: 180°C
0 –0.1
Pin body
SKH51
58–60HRC
Filter
SUS303 equivalent
-
Filter part
(reference value)
Part Number
G (reference value)
L 0.01mm increments
L
H
C
Outer diameter Number of rings
Normal
For tip processing
Type
P
3 4 5 6 3 4 5 6
2 3 4 5 2 3 4 5
1 2 3 4 1 2 3 4
6 7 8 9 6 7 8 9
1.0 1.5 2.5 3.5 1.0 1.5 2.5 3.5
GVFC (Normal/Medium flow rate) GVFCA (For tip processing/Medium flow rate) GVFCM (Normal/Large flow rate) GVFCAM (For tip processing/Large flow rate)
GVFEA/GVFEAM d P.455 GVFCA/GVFCAM d P.457
Model number
3
5
0.03
15.00–100.00
Filter length (reference value)
3
5
0.06
5mm
Maximum 3mm
Part Number -
L GVFC4 - 20.01
Delivery Quotation
Order
e Due to structural reasons, the processing margin is shorter than the filter length. Do not process beyond the processed margin as there is a risk of damage. e W hen processed to the maximum processing margin, the maximum distance from the processed surface to the assembly hole is about 0.5mm. Please be careful of any undercut or resin leakage.
Processing margin
L - (KC/WKC … etc.)
Part Number -
Alterations
GVFC4 - 98.25 - KC2.5
e The orientation of the flat cut with respect to the assembly holes cannot be specified.
Alterations Code
Spec.
Alterations Code
Spec.
Head diameter change HC = 0.1mm increments E P ≦ HC ＜ H E In relation to the head diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
Single flat cutting P/2 ≦ KC ＜ H/2
KC
HC
KC － 0.01 0
WKC Two flats cutting P/2 ≦ WKC ＜ H/2
Head diameter change (precision) HCC = 0.1mm increments P + 0.5 ≦ HCC ＜ H-0.3 Head thickness change TC = 0.1mm increments E 2 ≦ TC ＜ 4 (Dimension L remains unchanged) E 4-TC ≦ Lmax.-L
0 － 0.01
HCC
WKC
Varied width parallel flats cutting P/2 ≦ KAC ＜ H/2 KBC = 0.1mm increments only KAC ＜ KBC ＜ H/2
KAC KBC
－ 0.01 0
－ 0.01 0
KAC
KBC
TC
TC 0
－ 0.02
T
Two flats (right angled) cutting P/2 ≦ RKC ＜ H/2
RKC
Shaft end face alignment Remove the filter protrusion on the shaft end face by wire cutting (Dimension L remains unchanged) e See page d P.454 for changes in appearance
RKC － 0.01 0
Unit of designation 0.1mm
TK
DKC Three flats cutting P/2 ≦ PKC ＜ H/2
0 － 0.01
DKC
DKC
Example
Four flats cutting P/2 ≦ SKC ＜ H/2
SKC
• Install it in a place where gas tends to accumulate, such as the final filling part, to let the gas escape. • Provide a relief to secure the gas exhaust path. e For details on how to use it, refer to d P.453 “Overview of pins with gas vent filter”. e For how to use the tip processing type, refer to d P.458 “About the tip processing type”.
－ 0.01 SKC 0
0 ° KGC ± 0.5 AG °
Two flats (angled) cutting P/2 ≦ KGC ＜ H/2 0 < AG < 360 AG = 1° increments
KGC
120 ° 120 °
Three flats cutting at 120° P/2 ≦ KTC ＜ H/2
120 °
KTC
0
KTC
－ 0.01
457
458
Powered by FlippingBook