6321 Factory Wholesale Ball Bearing 105*225*49mm Wear Resistant for Pumps Fans Construction Mining Machinery

• GQZ single row deep groove ball bearings cover complete size range 6321 models. Manufactured with high-hardness GCr15 chrome bearing steel, these radial ball bearings support multiple seal options including open, Z metal shield, RS single rubber seal and 2RS double contact rubber seal. Featuring simple structure, low noise and stable high-speed performance, they fit various light, medium and heavy radial load equipment, widely used for general industrial, agricultural, motor and transmission machinery with universal interchangeable standard dimensions.

• Double 2RS contact seals for effective dust and water resistance
• High-hardness GCr15 steel for wear resistance and long service life
• Smooth low-noise operation under continuous high-speed rotation
• Standard universal dimensions for direct old bearing replacement
• Stable radial load capacity, simple installation and maintenance
• Wide working temperature range from -20℃ to 120℃

• Electric motors, small fans and blowers
• Agricultural conveyor and harvesting equipment
• Textile weaving and spinning machinery
• Packaging printing transmission lines
• Small gearboxes and household machinery
• General industrial roller transport devices

• Strict heat treatment to ensure consistent hardness and precision
• Complete 6004–6416 sizes in stock for fast delivery
• Dustproof 2RS sealed design reduces frequent lubrication
• Support OEM customization, free samples available
• Factory direct wholesale price with stable supply capacity
• Rigorous quality inspection before shipment

Q1: What does 2RS stand for?
A1: It means double-side rubber contact seals, anti-dust and splash-proof.

Q2: What material are these bearings?
A2: Bearing rings and balls are made of GCr15 chrome bearing steel.

Q3: Can these bearings run at high speed?
A3: Yes, they feature smooth structure for stable high-speed low-noise operation.

Q4: What lubrication is suitable?
A4: Grease lubrication is standard; oil lubrication is also acceptable.

Q5: Do you accept small bulk orders?
A5: Yes, we support both small trial orders and large wholesale OEM orders.