Rolling bearing packaging

**Rolling Bearing Packaging** Home > Bearing Knowledge > Rolling Bearing Packaging *Created on 2018/5/16* var cpro_id = "u3440131";

Rolling Bearing Packaging

Source: Bearing Network | Time: 2012-12-31

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Bearing packaging is typically divided into two main parts: inner and outer packaging. After the bearing has been manufactured and passed quality inspection, it must be cleaned and treated to prevent rust. Then, it is placed in the inner packaging, which serves to protect against water, moisture, dust, and shock, ensuring the bearing's quality and precision for its intended use and sale. The inner packaging of bearings is categorized based on the anti-rust period: 1. **Short Anti-Rust Period Packaging**: This offers a rust protection period of 3 to 6 months. It is suitable for large-volume deliveries to the same customer, where the bearings will be used within a short time. This type of packaging is simple and cost-effective, often agreed upon between both parties. 2. **Standard Anti-Rust Period Packaging**: Provides a rust protection period of one year. Ideal for general-purpose bearings that are not stored for extended periods. 3. **Long Anti-Rust Period Packaging**: Offers a rust protection period of up to two years. This is used for special or precision bearings that require long-term storage. Common materials used for inner packaging include polyethylene plastic tubes or boxes, kraft paper, plain and crepe polyethylene composite paper, cartons, polyethylene or plastic films, nylon or plastic fastening tapes, waterproof high-strength plastic tapes, and linen bags. All materials must ensure effective corrosion resistance. **Guidelines for Inner Packaging Methods**: - **Miniature Bearings**: Usually, 10–15 sets are placed in a plastic cylinder, and 5–10 cylinders are packed into a box or bag. - **Medium and Small Bearings**: Can be wrapped in polyethylene film and then covered with kraft paper or composite paper. They can also be placed in plastic cylinders or individually wrapped in polyethylene bags and then placed into a carton. - **Large Bearings**: Packed in a single layer of polyethylene film or composite paper, then placed in a carton. Alternatively, they can be wrapped in a polyethylene film bag, sealed, and then put into a box. Some may be placed in special plastic boxes or packaged in a three-layer system: inner layer (polyethylene tape or composite paper), middle layer (fastening tape), and outer layer (waterproof plastic tape). - **Extra Large Bearings**: Typically use a three-layer wrap as mentioned above, or a four-layer wrap with an additional layer of linen tape on the outside. For separable tapered roller bearings with an outer diameter of ≥150mm, polyethylene film should be placed between the inner and outer components before packaging. For exchangeable cylindrical roller bearings of similar size, the components can usually be separated and packaged individually. **Outer Packaging Requirements**: - **Double Corrugated Boxes**: Each box should not exceed 25kg in total weight, and the outside is usually strapped with plastic. - **Nail Boxes (Wooden Boxes)**: Each box should not exceed 30kg, and the exterior is secured with steel bands. - **Calcium Plastic Corrugated Boxes**: Similar to double corrugated boxes, but made from calcium plastic material, with a maximum weight of 25kg per box. When placing inner-packaged bearings into the outer box, it is important to first line the box with a plastic bag or film. If there is empty space, it should be filled with dry materials such as corrugated paper or paper scraps to prevent movement during transport. --- **Related Bearing Knowledge** Commonly used rolling mill bearings, equipment types, glass ceramic materials, bearing steel surface wear experiments, bearing quality control, new product planning, rolling bearing heating device methods, NTN bearing burnout inspection analysis, and avoidance methods. This article is linked to http:// Please indicate China Bearing Network: http:// Previous: FAG Cage and Information Next: NSK Bearing Brand Analysis

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Site Selection for Mass Flow Meter Installation
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone, out of touch with any other device. There must be 3 times the size of sensor between 2 sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold, especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and transformer, better 5m at least. Such device influences the performance of drive coil and pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
e) Make sure Ex-mark meet application requirements if in hazardous area.
f) Build a sunshade if the meter is under direct solar radiation. g) Keep the meter from corrosive liquid.

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