Question 1

What is the relationship and division of roles between Jiande Welfine Technology Co., Ltd. and Jiande Shengtao Import and Export Co., Ltd.?

Accepted Answer

Jiande Welfine Technology Co., Ltd. serves as our primary manufacturing factory, specialized in producing high-performance powder metallurgy bearings, self-lubricating bearings, and precision mechanical components.Jiande Shengtao Import and Export Co., Ltd. is our official export arm handling all international sales, customer service, and global trade operations.

Question 2

What are your factory's manufacturing capacity and company scale?

Accepted Answer

Established: Founded in 2001 as a national high-tech enterprise.

Facility Area: Operates a self-owned 30,000-square-meter modern facility.

Annual Capacity: 1,000 metric tons for powder metallurgy products and 300 metric tons for sintered bushings.

Question 3

What main product series do you offer on Made-in-China.com?

Accepted Answer

Powder Metallurgy Bearing & Sintered Bushing Series: Sintered bronze/iron sleeve bushings, flanged bushings, Oilite bearings, structural parts, and custom PM gears.Self-Lubricating & Bronze Bushing Series: Steel/bronze oilless bushings, solid bronze turned bushings, and cast bronze bushings with graphite plugs.  Composite & Special Bushing Series: Steel-backed bronze bushings, bimetal bearings, steel-backed Fe-Ni sintered alloy bushings with solid lubricants, and hardened steel bushings.

Question 4

What are the key technical features and material grades available for Graphite Plugged Bronze Bushings?

Accepted Answer

Initial Lubricating Film: Provides instant lubrication during start-up to prevent stick-slip motion.  Embedded Solid Lubricant: Ensures a continuous, self-lubricating film for wear resistance.  High Performance: High load capacities (up to $100	ext{ MPa}$), high thermal stability (up to $+400^\circ	ext{C}$), and superior corrosion resistance.

Question 5

What quality management certifications does your factory hold?

Accepted Answer

We maintain strict quality control across all production batches under four international standards:ISO 9001:2015 (Quality Management System)  ISO 14001:2015 (Environmental Management System)  ISO 45001:2018 (Occupational Health and Safety Management System)  IATF 16949:2016 (Automotive Quality Management System)

Question 6

Do you support OEM/ODM custom manufacturing, and what technical support do you provide?

Accepted Answer

Custom Manufacturing (OEM/ODM): Yes. Equipped with an in-house tooling/mold workshop and fully automated machinery, we produce custom powder metallurgy parts with tight dimensional tolerances based on client drawings.

Engineering Support: With over 20 years of expertise, we offer complete technical assistance, including alloy selection, simulation testing, custom engineering design, and installation guidance.

Question 7

Which key industries and applications are your bearings designed for?

Accepted Answer

Automotive: Engine parts, chassis, and steering systems.

Construction & Mining: Heavy machinery components and excavator steel bushings.

Elevators & Transit: Elevator bearing bushings and infrastructure components.

Power Tools & Appliances: Motor sleeve bushings and power tool sintered bearings.

Industrial Equipment: Injection molding machines, hydraulic gates, mining machinery, packaging machinery, and marine engineering.

Question 8

How do I select the right solid lubricant plug (SL1 vs. SL4) for my application?

Accepted Answer

SL1 (Graphite + Additives): Excellent chemical resistance and low friction. Temperature resistance up to $+400^\circ	ext{C}$. Ideal for general machinery, steel mills, mining, and atmospheric exposure.  SL4 (PTFE + $	ext{MoS}_2$ + Additives): Ultra-low friction coefficient with superior water-lubricating capability. Temperature resistance up to $+300^\circ	ext{C}$. Ideal for marine environments, water turbines, hydraulic turbines, and steam turbines.

Question 9

How do you ensure batch-to-batch quality consistency for international orders?

Accepted Answer

Quality consistency is maintained by pairing our fully automated processing equipment with strict internal quality protocols. Every production step-from raw material blending and sintering to precision machining and final inspection-is monitored under IATF 16949 standards.

Question 10

What information is required to get an accurate quote for custom parts?

Accepted Answer

To provide an immediate quote, please share the following details with our sales team via Made-in-China Inquiry:2D/3D engineering drawings or physical sample specifications.Preferred material grade or working conditions (e.g., maximum load, speed, operating temperature).  Estimated order quantity and delivery schedule requirements.

Product specifications

Oilless Bushing

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Type of Lubricant

Model NO.

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Bushing Material

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Lubricating Film Thickness

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Specification

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HS Code

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Our Certifications, Standards & Industry Recognition

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