turbojet engine bearing
C30X2904HY971 20x37x9mm micro jet engine bearing
German HQW Angular Contact Ball Bearing C30X2904HY971, hybrid ceramic ball bearing with ABEC7/P4 precision grade. Dimensions: 20mm bore, 37mm outer diameter, 9mm width. This high-speed angular contact ball bearing delivers a reference speed of 78,000 RPM with oil lubrication and 55,000 RPM with grease lubrication.
HQW C30X2904HY971 20x37x9mm High-Precision Angular Contact Ball Bearing
German HQW C30X2904HY971 Angular Contact Ball Bearing, ABEC7 P4 Hybrid Ceramic Ball Bearing 20x37x9mm
Bearing Model Name | HQW Angular Contact Ball BearingC30X2904HY971 |
Part Number | C30X2904HY971 |
Bore d (mm) | 20 |
OD D (mm) | 37 |
Width B (mm) | 9 |
Contact Angle | 25° |
Basic Dynamic Load Rating (N) | 6672 |
Basic Static Load Rating (N) | 3533 |
Reference Speed (Oil Lubrication, RPM) | 78000 |
Reference Speed (Grease Lubrication, RPM) | 55000 |
Light Preload Fva [N] | 34 |
Light Axial Stiffness Ca [N/µm] | 59.2 |
Light Breakaway Force KaE | 99 |
Medium Preload Fva [N] | 105 |
Medium Axial Stiffness Ca [N/µm] | 89.2 |
Medium Breakaway Force KaE | 312 |
Heavy Preload Fva [N] | 205 |
Heavy Axial Stiffness Ca [N/µm] | 115.3 |
Heavy Breakaway Force KaE | 624 |
Min. Chamfer Radius rsmin [mm] | 0.3 |
Brand | HQW |
Bearing Type | Angular Contact Ball Bearing |
The 7904/QC004193 is primarily associated with HQW (German precision bearing brand), a leading manufacturer of ultra-precision bearings for aerospace and high-speed machinery. This model aligns with the quality and performance standards of top precision bearing brands, matching the reliability of the GRW SV796 bearing and other 6x15x5mm bearing precision variants.
Bearing Type | HQW Type | Dimension |
796 | C30X19M6 | 6×15×5mm |
726 | C30X2M6 | 6×19×6mm |
788 W6 | C30X18M8 | 8×16×6mm |
798 | C30X19M8 | 8×19×6mm |
708 | C30X38 | 8×22×7mm |
7800 | C30X1800 | 10×19×5mm |
7900 | C30X1900 | 10×22×6mm |
7000 | C30X100 | 10×26×8mm |
7200 | C30X200 | 10×30×9mm |
7801 | C30X1801 | 12×21×5mm |
7001 | C30X101 | 12×28×8mm |
7802 | C30X1802 | 15×24×5mm |
7902 | C30X1902 | 15×28×7mm |
7002 | C30X102 | 15×32×9mm |
7202 | C30X202 | 15×35×11mm |
7803 | C30X1803 | 17×26×5mm |
7903 | C30X1903 | 17×30×7mm |
7003 | C30X103 | 17×35×10mm |
7904 | C30X1904 | 20×37×9mm |
7004 | C30X104 | 20×42×12mm |
Top Alternative & Replacement Brands
For seamless cross-reference and inventory flexibility, the 7904/QC004193 can be directly replaced by the following industry-leading precision bearing brands (same 20x37x9mm dimensions, P4 precision):
- SKF: S71904 ACEGA/P4A, 7904 CY series precision bearings
- NSK: 7904CTYNSP4, 71904DU ultra-precision angular contact bearings
- NACHI: 7904 CYU/GLP4 (ABEC 7 high-precision variant)
- FAG: Standard 7904-P4 precision spindle bearings
- GRW: Compatible with SV796 series CP4 precision bearings (size-matched alternatives)
Key Applications of 7904/QC004193 Bearing
It is widely deployed alongside CNC spindle bearing and high-speed precision bearing models, serving critical industries including:
CNC Machine Tools & Spindles
Aerospace & Model Turbines
Medical & Laboratory Equipment
High-Speed Motors & Actuators
Optical & Measuring Instruments
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GRW GMN HQW ZWICKER 7002/QC004148 Bearings 7001/QC003966 7000/QC004191 7904/QC004193 Turbojet Engine Bearings
Need a Quote?
Contact shenzhen sefuto tech co ltd for genuine 7904/QC004193 bearings, custom lubrication options, or matched SV796 CP4 L2TA XL001 CP precision bearing solutions. We offer fast shipping and technical support for all high-precision bearing needs.