1. Start with the buyer's constraints

Collect these details for each bearing position before you compare part numbers:

• Load direction and size: radial load, axial load, or a combination of both.
• Operating speed and whether the bearing will be grease- or oil-lubricated.
• Contamination and maintenance: whether the bearing needs to be open, shielded or sealed.
• Envelope dimensions: bore (d), outside diameter (D), width (B) and the mounting dimensions of the shaft shoulder or housing.
• Noise and vibration expectations for the equipment.

2. Check load direction, including axial load

According to the product description, the inner and outer rings of a deep groove ball bearing have deep groove raceways. The raceway arc radius is slightly larger than the radius of the ball. This design carries radial loads and also axial loads in both directions.

Key points on deep groove ball bearing axial load from the source material:

• In the standard design, the bearing carries radial loads plus some axial load.
• The source states that heavier axial loads can be carried if the radial clearance is increased. In that case, the bearing can replace high-speed angular contact ball bearings. Confirm the required clearance and the actual load case with the supplier before relying on this.
• Bearings with a notch cannot carry axial loads. If your application includes axial load, exclude notched designs.

If the main load is axial, a different bearing type may be a better fit (see section 6).

3. Match speed, friction and noise requirements

The source describes deep groove ball bearings as having low friction torque. It says they are most suitable for applications that need high-speed rotation, low noise and low vibration. Check the limiting speed for the exact designation you plan to use. The chart lists separate grease and oil limiting speeds, and the speed changes with the type of seal.

4. Choose the closure type

Besides the basic open type, the source lists these variants:

• N (e.g. 6000N): snap ring groove on the outer ring
• Z (e.g. 6000Z): shield on one side
• ZZ (e.g. 6000ZZ): shields on both sides
• 2RS (e.g. 6000-2RS): seals on both sides

The chart also lists RZ, 2RZ, RS and 2Z designations. Ask the supplier to confirm the exact closure meaning of any designation before you order.

Handling limit: The source states that 2RS bearings, which are sealed on both sides and filled with grease, must not be washed or heated. Make sure your installation and maintenance procedures follow this rule.

Most of these bearings use pressed steel cages.

5. Read the deep groove ball bearing chart

The published chart lists the new and old designations, boundary dimensions, basic load ratings, limiting speeds, mounting dimensions and mass. Here is a summary of the 6011–6013 entries:

Limiting speeds depend on the variant. Some examples from the chart:

In this chart, the RS and 2RS versions have lower grease limiting speeds than the Z, 2Z, RZ and 2RZ versions of the same size. Where the chart gives no oil speed, ask the supplier for it rather than assuming a value.

6. When a deep groove ball bearing may not be the right choice

• Notched bearings with axial load: The source states that these cannot carry axial loads.
• Mainly axial load: XINGTAI WEIZI BEARING CO., LTD. also lists thrust ball bearings. Single-direction thrust ball bearings carry axial load in one direction, and double-direction designs carry it in both directions. Review that product's own specifications for the load case before you choose between the two types.
• Heavier axial load handled by increasing radial clearance: This is a documented option, but the clearance and application need to be confirmed with the supplier.

Next steps

Send the bearing number, operating speed, lubrication method, load direction and closure requirement to XINGTAI WEIZI BEARING CO., LTD. Ask the team to confirm the specification for the exact part number. Pricing, delivery and certification details should be confirmed separately, because they are not covered by this guide.