YAMAWA dies,
their worldly recognized
accuracy and durability.
YAMAWA dies produced through most modern manufacturing facilities and long year technology.
Their accuracy and durability are highly evaluated among world industries.
Adjustable dies
Standard dies to cut external threads.
Adjusting screw enables minute adjustment in the size of external threads.
This die has adjusting screw in the slit portion. With the adjusting screw, the size of external threads can be adjusted minutely. These dies are most popular for cutting external screws and can be used both by hand and by machine.
Solid dies
One of general dies to cut external threads. Suitable for heavy cutting.
Different from adjustable dies, solid dies have no slit and cannot adjust thread size.
Size adjustment is not necessary. Easy for preparation and suitable for heavy cutting.
In Japan adjustable dies are popular, however, in overseas solid dies are more widely used.
Spiral Dies
Chip rooms are slantly located. Suitable for threading in hard-to-machine materials.
Slantly located chip rooms bring about good cutting performance and good chip ejection.
In right hand screws, in high efficiency left hand spiral chip rooms push chips forward and right hand spiral chip rooms pull chips in.
Spiral point dies
General round dies to cut external threads. Suitable for heavy cutting.
A part of chamfer portion is ground off to make a spiral pointed flute. Same with spiral fluted tap, chips, being pushed forward, do not cause the troubles caused by chips.
Pipe dies ( for taper threads, for parallel threads )
Pipe dies cut threads to be used for pipes and pipe parts.
Pipe dies are used for cutting taper threads and parallel threads. For cutting parallel threads, adjustable dies are only available.
Dies for auto lathes
Solid dies for auto lathes. Superior in cutting performance and good in durability.
Because of smaller OD and smaller thickness of dies, the rotating vibration during high speed cutting is little and the stable cutting of external threads can be obtained. Even under severe cutting condition, solid dies have little worry about instability.
There are two types, BR series for brass and ST series for steel.
Rolling dies
Can produce small external threads of high accuracy without chips.
Rolling dies are thread forming dies used in auto lathes to manufacture such small screws as for camera and wrist watches. 3 thread rollers installed in 1/3pitch difference among each roller produce threads by material deformation. Because of no chips, rolling dies have no chip trouble and produce the threads of high accuracy and good surface.