71811 ACD/P4 55*72*9 Super Precision High Capacity Single Row Angular Contact Ball
Bearing
Super-precision, high-capacity, single row angular contact ball
bearing
The 71811 ACD/P4 bearing,bore diameter is 55 mm, outside diameter is 72 mm,width is
9 mm,featuring precise dimensions, high static load capacity, P4
precision grade, delivers superior performance and reliability for
applications requiring high rotational accuracy and stability.
Part Number | 71811 ACD/P4 |
Bearing Type | Angular Contact |
Measurement Unit | Metric |
Dimensions | Inner Bore Diameter (d) | 55 mm |
Inner Bore Diameter Tolerance | -0.007mm to 0 |
Outer Bore Diameter (D) | 72 mm |
Outer Bore Diameter Tolerance | -0.007mm to 0 |
Width (B) | 9 mm |
Width Tolerance | -0.2mm to 0 |
Specifications | Contact Angle | 25° (15°,40° Available) |
Material | Chrome Steel |
Cage Material | Phenolic |
Number of Rows | 1 Single Row |
Seal Type | Open |
Temperature Range | -30°C to 150°C |
Lubrication | Grease or Oil |
Tolerance Class | P4 (ABEC-7) |
Weight | 0.073 kg |
Matched Arrangement | No |
Universal Matching Bearing | No |
Preload | Not applicable |
Load and Speed | Dynamic Radial Load | 9560N |
Static Radial Load | 10200 N |
Reference Speed For Grease (r/min) | 16,000 rpm |
Limiting Speed For Oil(r/min) | 24,000 rpm |


What's the Performance Features of 71811 ACD/P4 Bearing?
The 71811 ACD/P4 angular contact ball bearing is engineered for
high-precision and high-performance applications, featuring very
tight tolerances suitable for precise machinery, the ability to
handle both radial and axial loads simultaneously, high-speed
operation with stability, low torque and friction for energy
efficiency, enhanced rigidity for accuracy under heavy loads,
durability with extended service life, effective performance across
a wide temperature range.
What's the Applications of the 71811 ACD/P4 Bearing?
The 71811 ACD/P4 bearing is a high-precision angular contact ball bearing known for its
excellent performance in demanding applications. Below is a
detailed breakdown of its application areas across various
industries.
1. Machinery and Machining
- Grinding Machines: Grinding machines require highly precise rotating components. The
71811 ACD/P4 bearing’s high precision and smooth rotation ensure stability and
accuracy during the grinding process, thereby improving the quality
of machined parts.
- Lathes: Stability of the spindle is critical during cutting operations.
This bearing provides reliable support to lathe spindles, reducing
vibration and noise, ensuring efficient and stable operation for
turning various metals.
- Boring Machines: Boring machines are used for high-precision boring operations.
The high precision of this bearing ensures accurate spindle
rotation, achieving superior dimensional accuracy and surface
quality in bored holes.
2. Industrial Equipment
- Active Pharmaceutical Ingredient (API) Equipment: In pharmaceutical production, many machines require precise
operation and stable support. The 71811 ACD/P4 bearing can be applied to critical components such as mixers and
conveyors, ensuring normal operation and improving production
efficiency and product quality.
- Self-Priming Pumps: Self-priming pumps must withstand certain pressures and speeds.
The high load-carrying capacity and excellent speed performance of
this bearing ensure stable pump operation, enhancing reliability
and service life.
- Rubber Machinery: Rubber machinery performs complex operations like mixing,
extrusion, and molding during rubber product manufacturing. This
bearing provides stable support to rotating components, ensuring
efficient equipment operation and improving rubber product quality.
3. Other Fields
- Friction Welding Machines: Friction welding machines require precise rotation and pressure
control during welding. This bearing can be used in the spindle and
transmission components, ensuring welding stability and precision,
thus improving welding quality.
- Decanters: Decanters in wastewater treatment systems perform frequent
lifting and rotating operations. The high precision and reliability
of this bearing ensure the proper functioning of decanters,
improving wastewater treatment efficiency.
- Industrial Furnaces: Industrial furnaces require precise temperature and atmosphere
control during heating. This bearing can be used in transmission
components and fans, ensuring stable operation and improving
heating efficiency and product quality.
- Heat Transfer Equipment: Heat transfer equipment requires precise positioning and
rotation. This bearing provides stable support to key components,
ensuring accuracy and stability during the heat transfer process,
thus improving transfer quality.
- Plate Punching Machines: Plate punching machines require precise punching and positioning
of printing plates. This bearing can be used in the spindle and
transmission components, ensuring stable operation and improving
plate-making quality.
- Calender Machines: Calender machines require precise control of pressure and speed
during calendering processes for paper, plastic, and other
materials. This bearing provides stable support to key components,
ensuring stability and precision during calendering, thus improving
calendering quality.
- Sewing Machines: Sewing machines require high-speed, stable rotation during
sewing. This bearing can be used in the spindle and transmission
components, ensuring normal operation and improving sewing
efficiency and quality.
- Cycloidal Gear Reducers: Cycloidal gear reducers must handle large torques and speeds
during transmission. The high load-carrying capacity and excellent
speed performance of this bearing meet the operational requirements
of these reducers, ensuring stable operation and improving
transmission efficiency and reliability.
- Forestry Machinery: Forestry machinery must operate in harsh environments and handle
large loads during wood processing and logging. This bearing can be
used in key components such as sawmills and debarkers, ensuring
stable operation and improving forestry production efficiency.
- Water Welding Machines: Water welding machines require precise control and stable
operation during welding. This bearing provides stable support to
key components, ensuring welding stability and precision, thus
improving welding quality.
- Crushers: Crushers must withstand significant impact forces and loads
during material crushing. This bearing can be used in the spindle
and transmission components, ensuring stable operation and
improving crushing efficiency and quality.
CERTIFICATE | RoHS & REACH, IATF16949:2016 |
Feature | High Speed and Stiffness,High Running Accuracy,High Load Carrying
Capacity |
Service | OEM&ODM Customized Services |
Samples | Please Contact Us |
Service | Online Support,Professional Service |
Size | Standard,For custom sizes ,please contact us |
Factory Manufacturer | Yes |
If you need more detailed information , feel free to ask!
