Plain
Helical groove
PRECISION LEADER PINS – HEAD/HELICAL GROOVE STANDARD/PRESS–FIT LENGTH DESIGNATION TYPE–
Suitable
Leader pins with head Leader Bushings
Part Number
L
N
Press–fit section Dm5
Slidingpart D
T H E P
1mm incre- ments
Type
D
Selection
60 70
10
80 90 100 110 120
15
20
20
20
25
130 140 150 170
20
200 210
23
60 70
10
+ 0.017 + 0.008
−0.025 −0.030
8 ≦ N ＜ L/2
8
5
GPHLSP (Press–fit diameter D m5 /length designation type)
80 90 100 110 120
15
25
25
25
30
130 140 150 160 170
20
200 210 220 230
23
GPHLSP
2–3
130 140 150 160 170 180
20
3
30
30
30
35
0.2
190 200 210 220 230
23
200 210 220 230 240 250
25
10 ≦ N ＜ L/2
40
260 270 280 290 300
40
40
10 45
E
P
310 320 330 340 350 360
30
※
+ 0.020 + 0.009
ℓ＝ 2 L
0 －
−0.030 −0.040
T
Sliding part ( D )
0.2
8
230 240 250 260 270 280
25
N
290 300
－ 0.5 － 1.0
12 ≦ N ＜ L/2
50
50
50
12 55
L
310 320 330 340 350
30
※ The length of the spiral groove ( ℓ ) will be one half of the overall length ( L 2 ), regardless of the N dimension. E Recommended mold temperature for the usage of a precision leader pin and bushing is 80°C or less because of little clearance between them. ( D P.788 ) E A center hole may be left on one or both ends. E Oil groove part might not be colored by heat treatment. Despite differences in appearance, it can be used without any problem. E Please specify each dimension so that L–N– ℓ = 10mm or more. M Material SUJ2 H Hardness 58HRC– (Induction hardening)
E When no press–fit part is required, specify Nmin. 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. • When the overall length (L dimension) and the diameter of the press–fit part are freely specifed, please order using GPHL/GPH–XL ( D P.793 ).
■ Feature of spiral groove •The ring oil groove that has been widely used up until now retains the lubricating oil, and applies a suitable amount of oil when the guide pin and the guide bushing touch each other, thus helping to prevent seizure. In contrast, a spiral groove retains lubricating oil, and when the guide pin and the guide bushing come into contact with each other, the lubricating oil moves around the entire periphery of the pin along the spiral groove, resulting in greater seizure prevention effectiveness.
■ Chart of press–fit tolerance GPHLSP
Part Number – L – N GPHLSP25 – 100 – N24
Order
＋ 0.025
＋ 0.020
Delivery Quotation
GPHLSP
＋ 0.015
＋ 0.020 ＋ 0.009
Normal
＋ 0.017 ＋ 0.008
Press–fit section D m5
＋ 0.010
Part Number – L – N – (MC/MMC/GA/DKC) GPHLSP20 – 100 – N24 – MC
Alterations
＋ 0.005
When DKC code is used GPHLSP
＋ 0.005 0
＋ 0.005 0
Press–fit section D + 0.005 0
0
D20–30
D40/50
Alteration details D P.789
Alterations Code
Spec.
Alterations Code
Spec.
Leader assist mounting process E Available for D40/50
Tip tapping
M
GA
MC
Alteration details D P.789
D ℓ 20 M12 × 1.75 24 25–50 M16 × 2.0 32 M × Pitch
ℓ
Press–fit section tolerance alteration Dm5 c D + 0.005 0
Tapping on the head
DKC
M
MMC
N
D ℓ 20 M5 × 0.8 10 25–50 M8 × 1.25 16 M × Pitch
ℓ
799
800
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