Pursuit for possibilities of undeveloped fields.

We are always aiming to be as an active company that is not only satisfied with manufacture existing products, but also keep challenging to new fields with our technologies.

Miniaturized die spring for molds having high stress intensity using variant wire rods, products which are required more high heat resistance are examples of undeveloped fields we are challenging.
Tohoku Nippatsu is promoting epochal developments that added new value to usual precision processing technologies, and we will keep supplying these our technologies to advanced industrial field ungrudgingly.
Cold forming spring Die spring
*The example of standard specification
Kind characteristic Type Outer
(inner) diameter		 Total length Maximumde
flection		 Load*N {kgf
catalog NO. Color min. max. min. max. min. max.
Coilspring




F(few load) Yellow 15 500 40%
(1milion times)		 47.1
(4.8)		 3138.1
(320)
50%
(300 thousand)		 58.8
(6)		 3922.6
(400)
L(light load) Blue 15 350 32%
(1mil. times)		 62.8
(6.4)		 4785.6
(488)
40%
(300 thous.)		 78.5
(8)		 5982.0
(610)
M(medium load) Red 15 350 25.60%
(1mil. times)		 78.5
(8)		 6668.5
(680)
32%
(300 thous.)		 98.1
(10)		 8335.6
(850)
H(high load) Green 15 350 19.2%
(1mil. times)		 109.8
(11.2)		 10199
(1040)
24%
(300 thous.)		 137.4
(14)		 12749
(1300)
B(burden load) Brown 15 350 16%
(1mil. times)		 141.2
(14.4)		 14122
(1440)
20%
(300 thous.)		 176.5
(18)		 17652
(1800)