Oil groove
Plain
LEADER PINS WITH RECESS DIAMETER − HEAD/PLAIN PRESS–FIT LENGTH DESIGNATION TYPE/PRESS–FIT DIAMETER/LENGTH DESIGNATION TYPE−
Suitable
Leader pins with head Leader Bushings
■ GPHOT (Press–fit part diameter Dm5/length free designation/recess diameter free designation type) Slidingpart D Press–fit section Dm5 T H E Part Number L 5mm increments N 1mm increments B 1mm incre- ments Type D
DiameterofrecessDS 0.01mm increments
※
11.80 – 11.95
12
12
12
17
30 – 200
5 – 80
5
+ 0.015 + 0.007
−0.020 −0.025
13
5 – 50
12.80 – 12.95
13
13
18
16
30 – 250
8 – 80
15.80 – 15.95
16
16
21
※ When combining with GC alteration
5
20
30 – 300
8 – 100
5 – 80
19.80 – 19.95
20
20
25
GPHOT
GPHOT
(Press–fit diameter D m 5 /length free designation/diameter of recess free designation type)
8
+ 0.017 + 0.008
−0.025 −0.030
25
40 – 350
8 – 120
24.80 – 24.95
25
25
30
GPHOT–XL (Press–fit diameter /length/diameter of recess free designation type)
30
50 – 400
5 – 130
29.80 – 29.95
30
30
35
8 – 130
40
80 – 500
39.80 – 39.95
10 45
40 + 0.020 + 0.009
40 −0.030 −0.040
Diameter of recess ( DS ) 0 －0.01
8
50 100 – 550
8 – 140
5 – 140 49.80 – 49.95
50
50
12 55
E L ≧ N + B + E + 5 E When B = 0, specify BN. E When no press–fit part is required, specify Nmin. Also, the N dimension also includes the head thickness and the undercut below the head, so in case of N = T + (2 or 3), there will be no press–fit part. ■ GPHOT–XL(Press–fit diameter/length/diameter of recess free designation type) Slidingpart T H E Part Number L 5mm increments N 1mm increments Press–fit diameterDK B 1mm incre- ments D Type D 0.001mm increments Toler- ance
0.2
DiameterofrecessDS 0.01mm increments
T － 0.2 0
Sliding part ( D )
2–3
N
B
E
M Material SUJ2 H Hardness 58HRC–
11.80 – 11.95
12
12.000 – 12.050
12
17
－ 0.5 － 1.0
L
30 – 200
5 – 80
5
(Induction hardening)
−0.020 −0.025
13
13.000 – 13.050
5 – 50
12.80 – 12.95
13
18
E By specifying the diameter of the recess, it is possible to set the clearance at the guide part to a slightly larger value than the conventional value. E A center hole may be left on one or both ends. E It is possible to eliminate the B dimension (sliding part) by performing alteration BN. E By using the tip tapering (additional machining GC) as well, the effectiveness in preventing scuffing when the guide starts is improved (see photo above). E Temper color (heat treatment color) may not be applied to the tip. Despite differences in appearance, it can be used without any problem.
16 30 – 250
8 – 80 16.000 – 16.050
15.80 – 15.95
16
21
5
20 30 – 300
8 – 100 20.000 – 20.050
5 – 80 19.80 – 19.95
20
25
DK ± 0.002
GPHOT−XL
8
−0.025 −0.030
25 40 – 350
8 – 120 25.000 – 25.050
24.80 – 24.95
25
30
30 50 – 400
30.000 – 30.050
5 – 130
29.80 – 29.95
30
35
■ Chart of press–fit tolerance GPHOT
8 – 130
40 80 – 500
40.000 – 40.050
39.80 – 39.95
10 45
40 −0.030 −0.040
8
+ 0.025
50 100 – 550
8 – 140 50.000 – 50.050
5 – 140 49.80 – 49.95
50
12 55
+ 0.020
E L ≧ N + B + E + 5 E When B = 0, specify BN. E The N dimension also includes the head thickness and the undercut below the head, so in case of N = T + (2 or 3), there will be no press–fit part.
GPHOT Normal Press–fit section D m5 GPHOT When DKC code is used Press–fit section D + 0.005 0
+ 0.020 + 0.009
+ 0.015
+ 0.017 + 0.008
+ 0.015 + 0.007
+ 0.010
PartNumber– L – N – DK – B – DS GPHOT 25 – 250 – N100 – B10 – DS24.93 GPHOT–XL25 – 250 – N100 – DK25.009 – B20 – DS24.93
Delivery Quotation
Order
+ 0.005
+ 0.005 0
+ 0.005 0
+ 0.005 0
0
D12–6 D20–30 D40/50
Part Number – L(LC) – N – DK – B(BN) – DS – (MC/MMC … etc.) GPHOT–XL 25 – LC 249 – N24 – DK25.009 – BN – DS24.93 – GC–E20–K10
Alterations
E Press–fit (DK) can be designated at 0.001mm increments for GPHOT–XL.
Alteration details D P.789 / 790
■ Features • Prevents scuffing and seizure of the guide due to fluctuation of the guide pin position and the guide bushing hole position caused by thermal expansion of the mold, and realizes appropriate opening and closing of the mold during injection molding. It is possible to use as leader pin for rubber mold.
Alterations Code
Spec.
Alterations Code
Spec.
Total length alteration LC = 1mm increments Shortens the full length (L) as shown in the drawing. (Tip dimension E remains unchanged.) E Lmin. ＜ LC ＜ Lmax.
L
M
Tapping on the head D
LC
M × Pitch ℓ 12–20 M5 × 0.8 10 25–50 M8 × 1.25 16
MMC
LC
<At room temperature> <When the temperature rises>
• Physical properties of metal material D P.1213 • The appropriate clearance setting differs according to the size of the mold, the type of steel, the guide pin diameter, etc., so select it according to the application concerned.
ℓ
Since the clearance can be properly secured even when the temperature rises, the mold can be closed without galling or scuf ng.
Misaligned leader bushingdue to thermal expansion of the plate
Tip tapping
M
Leader pin Leader bushing
Tapers the tip Designation method GC−E20−K10 E = 1mm increments K = 1° increments 1° ≦ K ≦ 10° E E ＞ 20 of D16–30 is available only when L ≧ 50. X Combination with OC not available D E 12/13 5 ≦ E ≦ 20 16 5 ≦ E ≦ 25 20 5 ≦ E ≦ 30 25 5 ≦ E ≦ 35 30 5 ≦ E ≦ 40 40/50 5 ≦ E ≦ 20
D ℓ 12/13 M 6 × 1.0 12 16 M10 × 1.5 20 20 M12 × 1.75 24 25–50 M16 × 2.0 32 M × Pitch
MC
Leader bushing
ℓ
Scuf ng/ galling
Plate
Machining to eliminate sliding part. The sliding part is eliminated, so the only specifications are the diameters of the press–fit part and the recess. E BN is indicated as the B dimension
Outer diameter of a conventional leader pin
GC
BN
Thermal expansion caused by heating
E ±1
N
L
Leader pin for high temperature molding
Misalignment due to thermal expansion: About 0.05‒0.3mm (Varies depending on the plate size, steel material, and temperature) ※
Oil groove processing N + B ≦ L− ( ※ ) X Combination with GC not available
E The tapered part is to be cut.
E When combination with MC Alteration details D P.789
（※） OC
N B
Alteration details D P.790
L
Press–fit section tolerance alteration D m5 c D + 0.005 0 E Available for GPHOT
DKC
803
804
N
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