H71904C ultra-high-speed angular-contact bearing
Published product range- Designation
- H71904C
- Bore d × outside D × width B
- 20 × 37 × 9 mm
- Dynamic load rating Cr
- 5.0 kN
CHINA / HENAN / PRECISION BEARINGS
Luoyang Bearing Research Institute Co., Ltd. (ZYS)
洛阳轴承研究所有限公司
ZYS publishes precision and special-purpose bearings, spindle units, bearing equipment and related components. This profile identifies the manufacturer named on zys.com.cn and compares two angular-contact bearing designations. Select the complete designation before requesting an application review.
Products & published specifications
2 detailed product filesSelect a family to see the source, dimensional range and questions to confirm. Images below identify product families. Read each caption for the source and illustration status.
Images are credited individually. Technical illustrations explain published dimensions; they are not factory photographs. Series photographs do not establish individual specifications.
| Designation | d × D × B (mm) | Dynamic Cr (kN) | Static Cor (kN) | Grease limit (r/min) | Oil limit (r/min) | Approx. mass (kg) |
|---|---|---|---|---|---|---|
| H71904C | 20 × 37 × 9 | 5.0 | 2.9 | 53,000 | 80,000 | 0.04 |
| H71904AC | 20 × 37 × 9 | 4.8 | 2.7 | 45,000 | 67,000 | 0.04 |
Catalogue limits are not an approved operating speed for your assembly. Confirm preload, pairing, lubrication, thermal conditions and the current drawing. The source’s ambiguous contact-angle column is not reproduced.
Original comparison source ↗H71904AC ultra-high-speed angular-contact bearing
Published product range- Designation
- H71904AC
- Bore d × outside D × width B
- 20 × 37 × 9 mm
- Dynamic load rating Cr
- 4.8 kN
Product series in the official catalogue
Ultra-high-speed angular-contact bearings
H719C / H719AC and H70C / H70AC series; oil-air or jet lubrication is described for this family. The selected rows below are H71904C and H71904AC.
Company publication ↗Spindles and bearing equipment
The manufacturing page also lists high-speed spindles, bearing processing, inspection and test equipment. A bearing table does not specify any spindle or measuring instrument.
Company publication ↗Company facts
The following identity information is attributed to the company website. It does not replace registration or supplier approval checks.
| Field | Company-published information |
|---|---|
| Chinese entity | 洛阳轴承研究所有限公司 |
| English descriptive name | Luoyang Bearing Research Institute Co., Ltd. (ZYS) |
| Location | Luoyang, Henan, China; producing site and street address require confirmation |
| Entity correction | This profile concerns 洛阳轴承研究所有限公司. Do not substitute 洛阳轴研科技股份有限公司 or another related entity in a contract; confirm the seller and producing plant. |
| Company-published history | Predecessor institute established in 1958; not asserted as this legal entity’s incorporation date. |
| Export channel | [email protected] · +86 379 64884656 (company-published) |
Manufacturing & testing
The manufacturer describes production of precision and special-structure bearings, spindle units, bearing equipment and components. This is a company-published capability description.
The quality page names ISO9001, AS9100 and IATF16949. Certificate numbers, expiry dates and applicable production-site scope have not been verified; no certification badge is awarded here.
Company pages give different overall maximum bearing diameters (6.8 m and 7.1 m). Those broad envelope claims are not used for model selection. Obtain the actual producing entity and site for the quotation.
Technical & quality documents
These are public-document leads. Current certificate validity and product applicability have not been independently established.
Controlled model drawing
The online table gives selected basic dimensions and ratings.
Before approval
Request current revision, tolerances, accuracy class, material, cage, matched-set suffix and preload.
Application calculation
The catalogue separates grease and oil limiting speeds.
Before approval
Have the manufacturer check loads, duty cycle, fits, lubrication method and thermal balance for the selected assembly.
Quality and traceability
The official quality page lists management-system claims.
Before approval
Obtain current certificates with site/scope, lot traceability and agreed inspection records.
What to confirm before an order
Buyer guidance from Honyawn Atlas — not a statement of the manufacturer’s commercial terms.
Exact order code
Provide complete designation, precision class, preload, pairing arrangement and suffixes; C and AC rows have different ratings.
Operating conditions
Supply radial/axial loads, speed, spindle arrangement, shaft/housing fits, lubrication and temperature.
Manufacturing entity
Confirm the legal seller, producing plant, factory address and any subcontracted operation.
Commercial requirements
State quantities, destination and sample needs; request current MOQ, price, lead time and packing.
Have a specification ready?
Include the drawing or standard, quantity per size and delivery destination. Select quotation, samples or technical documents in the request form.
Prepare a sourcing request →Sources & review record
Reviewed 2026-10-24. The publisher and document scope are identified below. Information is attributed to each publisher; no site visit or independent factory audit is claimed.
- ZYS company identity ↗
Publisher is 洛阳轴承研究所有限公司; predecessor history is not incorporation date.
- Ultra-high-speed angular-contact bearing table ↗
H71904C and H71904AC dimensional, load and limiting-speed rows; page dated 9 May 2025.
- Production and manufacturing ↗
Published manufacturing families; no independent plant audit.
- Quality assurance ↗
Company certification claims only; validity and site coverage not independently established.
- Official contact channels ↗
Sales and export channels; no precise factory address established here.