Can you customize export packaging?

Yes, customized packaging is supported. We design export packing to protect springs against rust and collision damage during long-distance sea shipping.

Where is your factory located?

Our factory is located in Baotou, Inner Mongolia, China, with stable production capacity to support bulk orders.

Precision Wound Compression Spring Bolster Railway Coil Spring

Name: Precision Wound Compression Spring Bolster Railway Coil Spring
Brand: Inner Mongolia Firmaco Import & Export CO., LTD.
SKU: 2327542815

Inner Mongolia, ChinaInner Mongolia Firmaco Import & Export CO., LTD.

US$23.00

5 Pieces

Product profile

Customization

Available

Function

Buffer

Material

Alloy

Model NO.

Customized

Usage

Industrial, Auto

Load Type

Compression

Production Process

Cold Roll

Shape

Coil

Installation Position

Front / Rear

Product Type

Suspension Spring

OEM Service

Available

Certifications

ISO9001, ISO14001, AAR

Warranty

1 Year

Feature

Heavy Load, High Compression Resistance

Transport Package

Customized

Specification

Material diameter 12mm, customizable

Trademark

LUTONG

Origin

Inner Mongolia, Baotou

Key features

Heavy Load Capacity: Designed for heavy-duty suspension in vehicle bogies and heavy transport equipment.

Premium Alloy Material: Fabricated from high-grade alloy spring steel with high tensile strength and fatigue resistance.

Full OEM Customization: Customizable wire diameter, dimensions, and specifications based on drawings or samples.

Multiple Certifications: Certified with ISO9001, ISO14001, and AAR standards for quality and safety.

1-Year Warranty: Comprehensive 1-year warranty coverage for qualified products with after-sales support.

Customized Packaging: Tailored export packaging options to prevent rust and mechanical damage during shipping.

Cold Coiling Process: Room temperature cold coiling ensures precise dimensions and stable elastic performance.

Versatile Installation: Suitable for front or rear axle positions in various bogies and railway vehicles.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceCooperated with Fortune 500Years of Export Experience

Inner Mongolia Firmaco Import & Export CO., LTD.

Inner Mongolia, China

Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 20years CertifiedNearest Port: KarachiAverage Response Time: ≤10.84h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier offering 3D software design and broad customization services. Its stated production facilities include center sill welding, underframe welding and assembly, wagon body welding and assembly, and coating and drying lines. Service processes include written procedures for inspection, supplier assessment, corrective actions, and complaint handling, with overseas services stated for Pakistan. The supplier reports 20 years of export experience and a service-capability supplier pool of 97 qualified suppliers. Financial information is incomplete and indicates zero values for several reported historical performance fields; no financial conclusion beyond limited credibility evidence is supportable. Innovation capability is supported by design, development, process research, testing, and national-level technology platforms, but SDK availability is explicitly absent. No certification ownership or specific customer case is directly provided.

Supplier typeThe supplier is explicitly described as a professional technical supplier and operates across equipment, machinery, railway transportation equipment, automotive-related products, mechanical components, and related hardware categories. Its stated group capabilities include complete-machine and core-component design, development, process research, testing, and experimental verification.

After-Sales capabilityThe supplier states that it provides overseas debugging, maintenance, repair, training, and equipment installation in Pakistan. It also reports written and followed procedures for service-capability assessment, corrective and preventive actions, and customer complaints, supporting an established service process.

R&D capabilityThe supplier provides 3D software design and supports multiple customization modes. The group reports capabilities in machine and component design, development, process research, metrological testing, and experimental verification through national-level technology platforms; however, SDK availability is explicitly absent.

Production capacityNamed facilities cover center sill welding, underframe welding and assembly, wagon body welding and assembly, and coating and drying. The supplier also reports peak- and off-season lead times within 15 workdays to one month, together with written inspection procedures, indicating defined production and quality-control operations.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization, in addition to 3D software design services. This directly supports broad customization capability.

Product Q&A

Q:What is cold coiled suspension spring used for?

The cold coiled suspension spring is an essential elastic part for bogies and heavy vehicles. It bears vehicle weight, absorbs shocks and vibration during operation, supplies stable preload and evenly distributes dynamic loads. It stabilizes vehicle running and protects bogie assemblies.

Q:What material are your cold coiled springs made of?

Our LUTONG cold coiled springs are made of premium alloy spring steel. Adopting the cold coiling manufacturing process, the spring features high tensile strength, good toughness and superior anti-fatigue performance for heavy-load working conditions.

Q:Can you do OEM customization?

Yes, OEM service is available. We can produce cold coiled springs according to your drawings, samples or technical requirements. The standard wire diameter is 12mm, and we can customize specifications for front or rear axle installation.

Q:What certifications do you have?

Our products are certified with ISO9001, ISO14001 and AAR standards. All finished springs will undergo strict quality inspection before shipment.

Q:What is your warranty term?

We offer a 1-year warranty for our qualified cold coiled springs. We will provide professional after-sales support if any quality issue occurs within the warranty period.