What material is used for the bull gear?

The standard material is AISI 4135 (equivalent to 35CrMo), but customized materials are also available upon request.

What quality standards does the product meet?

The product quality surpasses API standard requirements through world-class heat treatment and multi-spindle CNC machining.

Single Row Crossed Roller Slewing Bearing 111.25.560 with External Gear for Boom Cranes

Name: Single Row Crossed Roller Slewing Bearing 111.25.560 with External Gear for Boom Cranes
Brand: Qingdao Hna Oilfield Equipment Manufacturing Co., Ltd.
SKU: 2118390382

Shandong, ChinaQingdao Hna Oilfield Equipment Manufacturing Co., Ltd.

US$2,000.00-4,000.00

1 Piece

Product profile

Customization

Available

Warranty

1 Year

Manufacturing Process

Forging

Model NO.

Bull Gear

Surface Treatment

Quenching

Operation Pressure

Atmospheric Pressure

Material

Steel

Transport Package

by Sea

Trademark

HNA

Origin

China

Production Capacity

3000

Key features

Forged Steel Construction: Made of AISI 4135 steel with forged construction for enhanced strength and durability.

API Standard Quality: World-class heat treatment and CNC machining ensure quality surpasses API standards.

Customizable Materials: Customized materials are available upon request beyond standard AISI 4135.

High Pressure Rating: Rated for drilling operations with a maximum pressure of 7500 PSI.

Variable Tooth Space: Options for narrow or wide middle teeth space, specifically 7mm or 65mm.

Gear Machining Options: Grinding process for HRC 55-60 hardness or gear hobbing available as options.

Full Interchangeability: Fully interchangeable with major pump models and power end types.

Long Service Life: Extremely long service life that exceeds API standards due to rigorous QC.

Company profile

Years of Export ExperienceFast DeliveryQuality AssuranceManagement Certification

Qingdao Hna Oilfield Equipment Manufacturing Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 23 Years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤3.40h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier with broad customization, ODM, and OEM capabilities. It holds ISO9001:2015, ISO45001:2018, and ISO14001 certifications, and reports documented quality, corrective-action, and complaint-handling procedures. Its export share is stated at 71%–90%, with 23 years of export experience, inventory capability, and participation in the Offshore Technology Conference. However, it does not provide 3D software design services, has no available SDK, no overseas warehouse, showroom, agent, or branch, and no valid manufacturing-capacity contract with affiliated subcontractors. No new products were launched in the past year, and only two R&D engineers are reported. Financial records are identified for 2021–2023, but the provided information does not contain sufficient financial performance detail to assess credibility. Customer evidence includes OEM service for well-known brands and repeat-buyer preference of 50%–80%, but no Fortune 500 cooperation.

Supplier typeThe supplier explicitly describes itself as a professional technical supplier and emphasizes learning, innovation, superior products, and technical support. This supports classification as a professional technical supplier rather than a purely trading-oriented entity.

CertificationsThe supplier reports ISO9001:2015, ISO45001:2018, and ISO14001 certifications in both its sustainability and management-system information. These stated certifications provide explicit evidence of formal quality, occupational health and safety, and environmental management systems.

After-Sales capabilityThe supplier states that it provides pre-sales and after-sales technical support, while documented procedures and records exist for corrective and preventive actions and customer complaints. These statements support an established after-sales and issue-resolution process.

R&D capabilityThe supplier has two R&D engineers and offers ODM services, but it does not provide an SDK, did not launch new products in the past year, and does not offer 3D software design services. The evidence shows some development capability but also explicit limitations in recent innovation output and technical-service scope.

Production capacityThe supplier reports in-stock service capability, 23 years of export activity, an export share of 71%–90%, and proximity to Qingdao Port. However, it has no valid manufacturing-capacity contract with affiliated subcontractors and lacks overseas warehouses, branches, and agents, so production and international fulfillment capability cannot be rated as clearly strong overall.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, flexible customization, and ODM services. This is direct evidence of broad customization capability, although 3D software design services are not provided.

Client casesThe supplier reports participation in the Offshore Technology Conference, OEM service for well-known brands, and repeat-buyer preference of 50%–80%. However, it reports no cooperation with Fortune 500 companies and provides no specific customer names or case details, so the evidence is positive but limited.

Product Q&A

Q:What are the payment terms?

For new clients, advance payment (30%-100% of total amount) is required, and the balance needs to be paid before delivery after inspection.

Q:What payment methods do you accept?

We accept T/T (Telegraphic Transfer) or L/C (Letter of Credit). You can make the payment through your bank as per the terms mentioned in the PI.

Q:What is the order procedure?

First, we discuss order details by email or social media. Then we issue a PI for confirmation. After receiving the deposit, we start production. Before finishing, we contact you for shipment details and balance payment. After settlement, we arrange shipment.

Q:What is the lead time for production?

Depending on the products, we usually need a couple of days or even months to complete production if we do not have the items in stock.

Q:Is customization available for this product?

Yes, customized materials and specific designs of HNA Bull Gear are available, complying with both API and non-API standards.