Spring is a common hardware accessories,
A name – B dimensional accuracy and rotation direction – C standard number – D material number – e surface treatment
A name: compression spring
B dimensional accuracy and rotation direction: D × D2 × H0 – precision direction of rotation
C Standard No.: gb2089-80Note: if the spring rotation direction is left rotation, it should be indicated, but it is not required to indicate the right rotation direction
When checking the inner diameter of spring, add “D1” after the value of D2.
Marking example: the material diameter is 1.2mm, the spring pitch diameter is 8mm, the free height is 40mm, the accuracy of load, outer diameter, free height and the perpendicularity between the axis line and the two end coils is grade 2, the material is carbon spring steel wire group IIA, and the surface is galvanized;The compression spring is 1.2 × 8 × 40-2, left gb2089-80 · iia-d · Zn.
The material diameter is 3 mm, the spring pitch diameter is 20 mm, the free height is 80 mm, the accuracy of load, inner diameter, free height and the perpendicularity between axis line and two end coils is grade 3. The material is carbon spring steel wire group II, and the surface oxidation treatment is right-hand spring;
The compression spring is 3 × 20d1 × 80, gb2089-80.