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BUTTON DIES

Button die type Material Type Shank dia.
tolerance
Normal Scrap retention Non-clogging
Round Shaped Round Shaped Round
Headed
D2 Equivalent Regular
type
Dm5 MHD HD□ SR-MHD SR-HD□ SV-MHD
D A-MHD A-HD□ SRA-MHD SRA-HD□
Economy
type
Dm5 EMHD EHD□ SR-EMHD SR-EHD□
D A-EMHD A-EHD□ SRA-EMHD SRA-EHD□
Powdered
high-speed
steel
Regular
type
Dm5 PMHD PHD□ SR-PMHD SR-PHD□ SV-PMHD
D A-PMHD A-PHD□ SRA-PMHD SRA-PHD□
Economy
type
Dm5 EPMHD EPHD□ SR-EPMHD SR-EPHD□
D A-EPMHD A-EPHD□ SRA-EPMHD SRA-EPHD□
Straight
D2 Equivalent Regular
type
Dn5 MSD SD□ SR-MSD SR-SD□ SV-MSD
D A-MSD A-SD□ SRA-MSD SRA-SD□
Economy
type
Dn5 EMSD ESD□ SR-EMSD SR-ESD□
D A-EMSD A-ESD□ SRA-EMSD SRA-ESD□
Powdered
high-speed
steel
Regular
type
Dn5 PMSD PSD□ SR-PMSD SR-PSD□ SV-PMSD
D A-PMSD A-PSD□ SRA-PMSD SRA-PSD□
Economy
type
Dn5 EPMSD EPSD□ SR-EPMSD SR-EPSD□
D A-EPMSD A-EPSD□ SRA-EPMSD SRA-EPSD□
Angular, headed
D2 Equivalent Regular
type
Dm5 AHD AHD□ SR-AHD SR-AHD□  
D A-AHD A-AHD□ SRA-AHD SRA-AHD□
Powdered
high-speed
steel
Dm5 PAHD PAHD□ SR-PAHD SR-PAHD□
D A-PAHD A-PAHD□ SRA-PAHD SRA-PAHD□
Angular, straight
D2 Equivalent Regular
type
Dn5 ASD ASD□ SR-ASD SR-ASD□  
D A-ASD A-ASD□ SRA-ASD SRA-ASD□
Powdered
high-speed
steel
Dn5 PASD PASD□ SR-PASD SR-PASD□
D A-PASD A-PASD□ SRA-PASD SRA-PASD□
Long shaped hole, headed
D2 Equivalent Regular
type
Dm5 MHDS HD□S      
Long shaped hole, straight
D2 Equivalent Regular
type
Dn5 MSDS SD□S      
Configurable full length, headed
D2 Equivalent Regular
type
Dm5 S-MHD
S-MHDS
S-HD□
S-HD□S
SRS-MHD
SRS-MHDS
SRS-HD□
SRS-HD□S
 
Configurable full length, straight
D2 Equivalent Regular
type
Dn5 S-MSD
S-MSDS
S-SD□
S-SD□S
SRS-MSD
SRS-MSDS
SRS-SD□
SRS-SD□S
 
Configurable size; full length, shaped hole depth, and relief hole specified; headed
D2 Equivalent Regular
type
Dm5 FMHD
FMHDS
FHD□
FHD□S
SR-FMHD
SR-FMHDS
SR-FHD□
SR-FHD□S
 
Configurable size; full length, shaped hole depth, and relief hole specified; straight
D2 Equivalent Regular
type
Dn5 FMSD
FMSDS
FSD□
FSD□S
SR-FMSD
SR-FMSDS
SR-FSD□
SR-FSD□S
 
Dowel slot
D2 Equivalent Economy
type
Dn5 EKSD EKD□ SR-EKSD SR-EKD□  
Regular
type
KSD KD□ SR-KSD SR-KD□
Tilting, dowel slot
D2 Equivalent Regular
type
Dn5 KSDS KD□S      
For flame hardening, dowel slot
SX105V Regular
type
Dn5 HKSDS HKD□S      

MACHINING GUIDE FOR BUTTON DIES

■Difference between economy type and regular type


●The regular type includes the straight shaped hole section B (2 mm), while the economy type does not. For this reason, alteration PKC (shaped hole diameter tolerance change) cannot be used for the economy type.

■Concerning shaped hole depth b and alteration LC (full length change)


●With headed types, because a head thickness is set, LC machining is performed from the button die shaped hole, reducing the shaped hole depth b. With a regular type, the straight section B remains 2 mm, however if b- (L-LC) <2 then B=b- (LLC). In this case, the tapered part 1 disappears.


●With a straight type, because LC machining is performed from the relief hole direction, shaped hole depth b remains unchanged.

(The same applies to alterations CKC and MKC.)

■Indication of button die relief angles


indicates a taper in which the diameter increases by 1 mm over 50 mm of length.

Taper 1/50 1/100 1/150
Angle (A°) 1.146° 0.573° 0.382°

■Button die L dimension and P•W spread

■Scrap retention button dies (For details, click here)

With scrap retention button dies, 2 or more slanted grooves are machined on the inner surface of the die. The scrap initially punched out during the punching process forms small projections along the slanted grooves in the die. When the punching process pushes this scrap farther down to the bottom, the projections become compressed by the sides of the die ("ironing" effect), preventing scrap lifting from occurring.

●Applicable range
  1.Hole diameter: φ1.0~φ16
  2.Workpiece material: Can be used up to a maximum tensile strength of 120kgf/mm2 (1177N/mm2).
  3.Thickness of workpiece materials: Minimum thickness 0.15 mm
  4.The scrap retention effect cannot be obtained if the clearance (C) exceeds 20% of the workpiece thickness (MT). Make sure that the clearance is 20% or less of MT.
  Clearance (C) <Workpiece thickness (MT) ×20%

Because scrap retention button dies prevent scrap lifting by forming small projections on punching scrap, they are not suitable in cases such as punching of precision holes, or when the punched-out item becomes the product.

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