8311
Detailed parameters and installation dimensions:
ID: 2.165 inch, OD: 4.724 inch, T/B: 2.283 inch, Seals type: Open, Flush Ground: Yes, Rolling Element: Ball Bearing, Single Row
Part Number: 8311 MRC/Marlin Rockwell
Bearing Type: Angular Contact Ball Bearings, Double Row
Bearing Size(metric): Inner dia. (d): 55 mm X Outer dia. (D): 120 mm X Width (B): 58 mm or Size: 55 mm * 120 mm * 58 mm
Original Equipment Manufacture(OEM NO.): 8311
Bore: C (Cylindrical Bore)
Seals Type: No Seal
Cage Design: M (Brass Cage)
Radial internal clearance:Cn Normal Internal
Precision Rating: 77 - ABEC.3 Tolerances
Type of lubrication: Standard class lubrication
Thermal Stability: No Thermal Stability - Temperatures up to 120°C
Split Innering / Outerring: Standard
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8311 refers to a specialized type of Single row angular contact ball bearings, with dimensions 55 mm (Bore) x 120 mm (OD) x 58 mm (Width), designed for High speed, high precision, Low friction and low heat generation, primarily used in Precision machine tools, motors, high-speed spindles, for applications General machinery, automobiles, machine tool spindles, motors, gearbox, robots, precision instruments It weight approximately 3.195 kilogram.
Single row angular contact ball bearings (8311) features:
The raceways of the inner and outer rings of a bearing have a contact angle (typically 15°, 25°, 30°, or 40°), which allows it to withstand radial loads and axial loads in one direction simultaneously, or to withstand purely axial loads.
High-speed capability: Compact structure with spherical rolling elements, low friction, and low heat generation, making it ideal for high-speed operation.
High rotational accuracy: Typically manufactured to high grades (e.g., P5, P4, P2), ensuring extremely high rotational accuracy and smooth operation.
The 8311 bearings adopts a High speed, high precision, Low friction and low heat generation design, the equipment operates more stably .
Single row angular contact ball bearings (8311) application:
High-speed precision spindles: Spindles for high-speed machining centers, precision grinding machines, and internal grinding machines.
High-speed motors and electric spindles: High-speed variable frequency motors, dental handpieces, and small gas turbines.
Precision instruments: High-precision measuring equipment, optical rotary tables, and gyroscopes.
Robot joints: Wrist or forearm joints for lightweight industrial robots and collaborative robots.
Office automation equipment: Photosensitive drum bearings for high-speed laser printers and copiers.
- Min. Order: 1 Piece/(8311, 55 = ID, 120 = OD, 58 = B, 3.195 kg) or according to different suppliers
- Price: Different brands, different quality, different 8311 prices, different suppliers and different quality determine different prices, you can ask the supplier in detail for the price according to your own needs.
- Precision Rating: DIN: P2~P0; ANSI: ABEC9~ABEC1; JIS: JIS~JIS0; ISO: CLASS2~NORMAL CLASS; GB/T30794 B~G
- Inquiry ways: The right of the inquiry form, Email, skype, Whatsapp
Specifications From Tradebearings:
Manufacturer Part Code: 8311 PUMPAC;
Dimension Inside - id φ: 55 mm;
Dimension Outside - OD Φ: 120 mm;
Dimension Width - B: 58 mm;
Contact Angle: 40/15 °;
Pairing Type: Back-to-back;
Type of Closure: Open;
Running Accuracy Class: ABEC 3 (ISO Class 6);
Operation Temp Rating: Maximum of +375 °F;
Radial (Dyn. load rating Cr): 40°: 101;
15°: 88.4 kN;
Radial (Stat. load rating C0r): 40°: 85;
15°: 61 kN;
Material of Bearing: Steel;
Limiting speed Max (1/min): 6300 RPM;
Material of Cage: Brass;
Surface Coating: NO;
Width Of Outer Ring: 58 mm;
Width Of Inner Ring: 58 mm;
Fillet Radius(ra): 2 mm;
Bearing Series: 8300;
Standards: ABMA;
ISO;
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