Bearing packing includes inner packing and outer packing.
After the bearings have been manufactured and passed the inspection, they shall be cleaned and rust-proof, and then put into the inner packing to achieve the purpose of being waterproof, moisture-proof, dustproof, impact proof, maintaining the quality and accuracy of the bearings as well as being convenient for use and sale.
The bearing inner packaging is divided into three categories according to the rust prevention period:
Short antirust packaging: antirust period of 3 to 6 months, suitable for large quantities of goods to the same subscriber, in a short period of time will be put into use bearings.According to the agreement of both parties, in order to facilitate the use of the principle, the use of simple packaging.
General antirust packaging: antirust period of one year, suitable for general purpose bearings.
(3) long anti-rust period packaging: two years of anti-rust period, suitable for special and precision bearings.
The inner packing materials of the bearing are polyethylene plastic barrel (box), kraft paper, plain and corrugated polyethylene composite paper, paper box, polyethylene or polyethylene plastic film, nylon fastening belt or plastic fabric fastening belt, waterproof high-strength plastic belt, gunny bag, etc.All the above materials should be qualified in corrosion resistance test.
The principle requirements of the bearing inner packing method:
Miniature bearings: every 10 ~ 15 sets of bearings into a plastic cylinder, every 5 ~ 10 plastic cylinder into a carton (or bag, roll).
Medium and small bearings:
-- multiple sets of bearings are wrapped with polyethylene film, kraft paper or polyethylene composite paper;
-- multiple sets of bearings are packed into a plastic cylinder (box);
-- a single set of bearings shall be packed in a polythene film bag, folded or sealed into a carton.
(3) large bearing:
-- packed in a carton after a single set of polyethylene film or polyethylene composite paper;
-- a polythene film bag, a single set of packaging folding bag mouth, and then into a carton;
-- single set into special plastic box;
-- single three-layer wrapping package: inner layer with polyethylene film tape or composite paper tape, middle layer with fastening tape, outer layer with waterproof permeable plastic tape.
-- a single set of three wrapped packages (ibid.);
-- single times four wrappings: after the three wrappings, the outermost layer is wrapped in a linen ribbon.
For detachable tapered roller bearings with outer diameter ≥150mm, polyethylene film should be lined before the inner and outer components are packed, or the inner and outer components should be packed separately.
For interchangeable cylindrical roller bearings with outer diameter ≥150mm, because the complete package is easy to be damaged, the internal and external components can be packed separately.
The general materials and requirements of bearing outer packing are as follows:
(1) double corrugated cartons, the total weight (gross weight) of each carton is not more than 25kg.
(2) nailing board box (wooden box), the total weight of each box does not exceed 30kg, the box is bound with blue steel belt;
(3) calcium plastic corrugated box, the total weight of each box does not exceed 25kg, the box likes to be tied with plastic packaging belt.
When packing the bearing products with inner packing into the box, the box should be lined with plastic bags or plastic film;If there is any space in the box, please use corrugated paper, paper scraps and other dry materials to fill.