Die Steel SKD61 + Nitriding
PINS FOR EJECTOR BLOCK
High Speed Steel SKH51 + Hard chromate Die Steel SKD61 + Nitriding High Speed Steel SKH51
Example
■ Characteristics • The assembly and adjustment of ejector block (stripper plate) ejected mold is easy. • The ejector blocks can be installed from the parting line by using socket head cap screws. • The rotation during bolt tightening can be prevented by combination with key flat cutting alteration (KC, etc.). • T hey are used by customers of food containers, medical apparatuses, cylindrical molded products, automotive interior decoration products and home appliances, etc.
Close–up of tip end
EBPJ
0.05 A
b 1 (Range of guaranteed shaft diameter precision)
X1
Die Steel SKD61
● Example of use on cylindrical containers
Pre–Hardened Die Steel SKD61
M × 2
M Material SKD61 equivalent + Nitriding H Hardness Surface: 900HV– Base material: 40 ± 3HRC
T ＋ 0.02 0 －
Stainless Steel SUS440C
0.05
M
※
0 ＋ 0.05
0 ＋ 0.5
－ 0.01 － 0.02
（ 200 ＜ L ≦ 500 0
, L ＞ 500
）
P
L
L
L
A
Range of guaranteed shaft diameter precision/base material hardness/Range of guaranteed surface hardness for nitriding (Details D P.7 )
※ When P ＞ 12 –0.01 –0.03 .
4mm
Finished products
JIS (6/8mm)
L 0.01mm increments (L ＞ 500 C 0.1mm increments)
Part Number
H
T
M
Type
P
Core
Socket head cap screw
10mm
6 7 8
10 11 13 15 17 21 25
40.00–450.00
6
P.L.surface
P –0.01 –0.02 P 0 - 0.005
3 6 8 10 12 16 E M ≦ P–3 4 5
Ejector block (stripper plate, ejection block)
40.00–500.00
EBPJ
10 12 16 20
8
P 0
–0.002
40.00–800.00
Standard Size Total Length Designation
Cavity insert
Part Number – L – M EBPJ8 – 220.00 – M4
Quotation
Delivery
Order
Shaft Diameter Designation Shaft Diameter/ Total Length Designation
Movable die plate
Part Number – L – M – (KC/WKC … etc.) EBPJ8 – 225.55 – M4 – WKC4
Alterations
Alteration details D P.9
Tip Process
EBPJ Pins for ejector block
Alterations Code
Spec.
Alterations Code
Spec.
Engraving
Head diameter change HC = 0.1mm increments E P + 1 ≦ HC ＜ H
Single flat cutting P/2 ≦ KC < H/2
HC
KC
0 － 0.1
Gas Vent
KC
Ejector plate (Upper side)
Head thickness change TC = 0.1mm increments E T/2 ≦ TC ＜ T (Dimension L remain unchanged) E T−TC ≦ Lmax.−L Dowel hole boring X Combination with other than NHC/NHN not available Dowel hole + Spring pin driving X Combination with other than NHC/NHN not available Dowel hole + Dowel pin driving X Combination with other than NHC/NHN not available
WKC Two flats cutting P/2 ≦ WKC < H/2
Ejector plate (Lower side)
TC
0 － 0.1
TC
WKC
T
Varied dimension flat cutting P/2 ≦ KAC < H/2 KBC = 0.1mm increments only KAC < KBC < H/2
＋ 0.1
KAC KBC
0 d
－ 0.1 0
－ 0.1 0
T 6 8
d
ℓ
KAC
KBC
NC
3 5
T
About Designation Unit for Key Flat Cutting
RKC Two flats (right angled) cutting P/2 ≦ RKC < H/2
d
0 － 0.1
T 6 8
d ℓ 1
RKC
NCW
3 5
T
Unit of designation 0.1mm
DKC Three flats cutting P/2 ≦ DKC < H/2
d
0 － 0.1
T 6 8
d ℓ 2
NCS
DKC
DKC
3 5
T
SKC Four flats cutting P/2 ≦ SKC < H/2
Numbering on the head Range of designation and Designation method: D P.10 X Combination with SKC/MC not available Automatic sequential numbering on the head Range of designation and Designation method: D P.10 X Combination with SKC/MC not available
0 － 0.1
217
SKC
NHC
± 0.5 AG ° 0 °
Two flats (angled) cutting P/2 ≦ KGC < H/2 AG = 1° increments 0 < AG < 360
KGC
1 2 3
KGC
NHN
120 ° 120 °
Three flats cutting at 120° P/2 ≦ KTC < H/2
0 － 0.1 120 °
KTC
MC
Head tapping E Available when P ≧ 8 X Combination with any other alteration not available
P 8
M
KTC
M4 M5 M6 M8
MC
10 12
91
92
M × 1
16/20
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