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HS71924 C/HQ1 P2 QBT A

Bore
120 mm
Outer
165 mm
Width
88 mm
Wight
- kg
Angular contact ball bearings, super-precision
High precision, high speed, and high rigidity; capable of withstanding combined loads and operating smoothly; used in machine tool spindles, high-speed machining centers, and precision instruments.

Main technical Specifications

New Designations :
HS71924 C/HQ1 P2 QBT A
Main demensions :
120 × 165 × 88
Bore Dia × Outside Dia × Width Dia (mm)
HS Code :
8482103000
Bearing customs code
ID :
120 mm
Inside diameter(I.D.)
OD :
165 mm
Outside diameter(O.D.)
T(B) :
88 mm
Thickness(W.D.)
Cr :
36.5 kN
Radial dynamic load rating
C0r :
48 kN
Radial static load rating
Grease rpm :
11000 r/min
Reference speed
Oil rpm :
18000 r/min
Limiting speed
Category :
Angular contact ball bearings, super-precision

Detailed parameters and installation dimensions:

rs(min): 1.1 mm, r1s(min): 0.6 mm

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HS71924 C/HQ1 P2 QBT A refers to a type of Angular contact ball bearings, super-precision, with dimensions 120 mm (Bore) x 165 mm (OD) x 88 mm (Width), designed for High speed, ultra-precision, high rigidity, low operating friction, and long service life, primarily used in CNC machine tool spindles and other high-precision machinery, Its normal operating speed can reach: the grease speed ratings: 11000 rpm, oil speed ratings: 18000 rpm, for applications the field of precision machinery, especially high-speed and high-precision spindle systems, requiring high running accuracy and the accommodation of radial and axial loads simultaneously. it's built to handle significant loads (dynamic radial: 36500 N, static radial: 48000 N, ),

  • Min. Order: 1 Piece/(HS71924 C/HQ1 P2 QBT A, 120 = ID, 165 = OD, 88 = B, kg) or according to different suppliers
  • Price: Different brands, different quality, different HS71924 C/HQ1 P2 QBT A 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

QUOTATION Bearing 6204-2RS2/C3WT

Please note delivery will be to Miami / FL – ZIP 33178 and advise delivery time. 12 pc - Bearing 6204-2RS2/ C3WT SKF

✨What are the Benefits of choosing HS71924 C/HQ1 P2 QBT A bearings?

  • High simultaneous load-bearing capacity: Capable of simultaneously withstanding combined radial and axial loads and operating at high speeds.
  • High speed limit: Optimized contact angle and cage design suitable for ultra-high-speed operation (e.g., machine tool spindles).
  • Rigidity and precision: Provides extremely high rotational accuracy and system rigidity, ensuring precision in machining or operation.
  • Preload adjustment: Precise preload adjustment is possible through paired installation (back-to-back/face-to-face), eliminating backlash and improving system stability.
  • Versatile design: Offers different contact angles (e.g., 15°, 25°) to accommodate different speeds and load requirements.
  • The HS71924 C/HQ1 P2 QBT A Angular contact ball bearings, super-precision adopts a High speed, ultra-precision, high rigidity, low operating friction, and long service life design, with dimensions an inner diameter of 120 mm, an outer diameter of 165 mm, a width of 88 mm, ensure the equipment operates more stably , and the maximum speed can reach (Limit Speed Ratings (grease) rpm:11000 Limit Speed Ratings (oil) rpm:18000)for applications the field of precision machinery, especially high-speed and high-precision spindle systems, requiring high running accuracy and the accommodation of radial and axial loads simultaneously.

🏭 What are the applications of the HS71924 C/HQ1 P2 QBT A bearing?

  • Machine tool manufacturing (spindles, grinding heads): Achieve extremely high speeds and machining accuracy, improving surface quality and production efficiency.
  • Aerospace (accessory gearboxes, gyroscopes): Maintain high reliability and long lifespan during high-speed operation, adapting to harsh environments.
  • Precision instruments (measuring equipment, optical instruments): Provide extremely low vibration and smooth operation, ensuring measurement accuracy.
  • High-speed motors (electric spindles, permanent magnet motors): Support ultra-high speed operation, reducing temperature rise and power consumption.
  • Semiconductor equipment (wafer dicing machines, lithography machines): Ensure micron-level positioning accuracy and long-term stability, improving yield.
  • Medical devices (CT scanners, surgical robots): Achieve quiet and smooth rotation, meeting medical safety standards.
  • Robotics (joint reducers): Improve joint response speed and repeatability, enhancing dynamic performance.

📐 How should choose the right model for a Angular contact ball bearings, super-precision?

Direction Selection

High-speed priority: Select small contact angles (15°/18°), such as SKF's E/B/A design or NSK's ROBUST series.
Heavy-duty/high-rigidity priority: Select large contact angles (25° and above), such as SKF's D design or NSK's TAC-F series.

Parameter Selection

Size series: Ultra-light 718, Extra-light 719, Light and narrow 70, Heavy-duty 72.
Internal design: Correspond to the high-speed or heavy-duty optimization code of each brand.
Material: Ceramic balls (hybrid ceramic bearings) can significantly improve high-speed performance.

Accuracy and Combination Selection

Accuracy: Machine tool spindles generally select ISO P4 grade (ABEC 7 grade) or higher.
Matching: DB (back-to-back) has good rigidity; DF (face-to-face) has good thermal conductivity; DT (tandem) can withstand unidirectional heavy loads.
Preload: Select light, medium, or heavy-duty according to the load; universal matching models are more convenient.

🛠️ What is the mounting procedure for HS71924 C/HQ1 P2 QBT A bearings?

Cleaning and Inspection: Clean the bearing in a dust-free environment. After a rough wash to remove contaminants, perform a fine wash until the bearing feels smooth and responsive to the touch. Simultaneously check the accuracy of the mating surfaces of the shaft and bearing housing.

Measurement and Fitting: Precisely measure the bearing's inner and outer diameters. Mark the corresponding positions on the shaft and housing bores for alignment during assembly to compensate for any deviations.

Installation and Positioning: Apply pressure evenly using a specialized tool, focusing only on the interference fit rings. If heat fitting is used, tighten the inner ring during cooling to prevent clearance from affecting the preload.

Preload Adjustment: When installing in pairs, ensure the parallelism of the inner and outer spacers is ≤1μm. Adjust the preload force to the specified value by grinding the spacers.

Lubrication Inspection: Add the specified amount of grease or oil mist lubricant. After installation, manually rotate the bearing to check its flexibility and operating noise.

📋 Special Note for mounting HS71924 C/HQ1 P2 QBT A bearings?

Clean Environment: Operation must be performed in a dust-free cleanroom with humidity ≤65% to prevent dust and impurities from affecting accuracy.

No Striking: Direct striking of the bearings is strictly prohibited. Special tools must be used, and force must be applied evenly.

Matching Marks: Bearings used in pairs are not interchangeable. Installation must strictly follow the factory matching marks.

Rust-Proof Storage: Long-term storage requires regular rust-proofing treatment. Maintain ventilation and avoid corrosive gases.

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