Pins

Feature: The spring pin means the pin having the function of spring that is called roll pin or self-lock pin. In general, the spring pin is made through this process: a steel band is molded into a cylinder-shape and then, gaps are given to it in the vertical direction, which is inserted into a hole whose diameter is a little smaller than the outer diameter of the pin, By doing this, inner pressure works around the hole, which prevents the pin from separating. The steel band should be heat-treated so it gets to have sufficient strength against the shear force, Compared with the parallel pin, its inside is empty so it is light. The end (one or both) of the pin is rounded for easy insertion into the hole.

Usage: substitution of connection by split pin, rivet or screw, and mostly for stopa pin of bolt nut, locking pin and clamping pin.

Criteria for choosing spring pin materials

Besides, SPS 6 kinds (SUP 10) and 50CR V4 of DIN are used
Any other material than described above can be used for special purposes
You are recommended to discuss with the engineers of Daewon Spring for the design and the material of springs.

Specification

Records of Specification in Ordering Spring Pin
Classification	Special Requirements	Remarks
Material in use		Choose the material based on the manufacturer's standards unless specified otherwise
Size of the hole for insertion (D)	mm
Outer diameter of spring pin (di)	mm
Inner diameter of spring pin (d2)	mm
Length of spring pin	mm
Rounding for both ends of spring pin		Record whether one or both are rounded
Surface treatment		Treatment with rust preventive oil or separate surface treatment is possible upon request
Other specifications applicable	DIN 1481, 7346	Classify for general or load purpose

Standard Requirements **A. Load (DIN 1481 Requirement)**
Pin Hole Size	10	12	13	14	16	18	20	21	25	28	30	32	35	38	40	45	50
End Facing	2	2	2	2	2	2	3	3	3	3	3	3	3	4	4	4	4
External Diameter (min)	8.5	10.5	12	14.5	16.5	18.5	20.5	21.5	25.5	28.5	30.5	32.5	35.5	38.5	40.5	45.5	50.5
External Diameter (max)	8.8	10.8	12.8	14.8	16.8	18.9	20.9	21.9	25.9	28.9	30.9	32.9	35.9	38.9	40.9	45.9	50.9
Internal Diameter (d2)	6.5	7.5	8.5	8.5	10.5	11.5	12.5	13.5	15.5	17.5	18.5	20.5	21.5	23.5	25.5	28.5	31.5
Thickness (s)	2.0	2.5	2.5	3.0	3.0	3.5	4.0	4.0	5.0	5.5	6.0	6.0	7.0	7.5	7.5	8.5	9.5
Length	Customizable from 100mm to 200mm by 2mm

**B. General Light Load (DIN 7346 Requirement)**
Pin Hole Size	10	12	13	14	16	18	20	21	25	28	30	32	35	38	40	45	50
End Facing	2	2	2	2	2	2	3	3	3	3	3	3	3	4	4	4	4
External Diameter (min)	10.5	11.5	12.5	13.5	14.5	16.5	18.5	20.5	21.5	23.5	25.5	28.5	30.5	35.5	40.5	45.5	50.5
External Diameter (max)	10.8	11.8	12.8	13.8	14.8	16.9	18.9	20.9	21.9	23.9	25.9	28.9	30.9	35.9	40.9	45.9	50.9
Internal Diameter (d2)	8.5	9.5	10.5	11.5	11.5	13.5	15.5	16.5	17.5	19.5	21.5	23.5	25.5	28.5	32.5	37.5	40.5
Thickness (s)	1.0	1.0	1.0	1.25	1.5	1.5	1.75	2.0	2.0	2.0	2.0	2.5	2.5	3.5	4.0	4.0	5.0
Length	Customizable from 100mm to 200mm by 2mm