Power Your Motion with Precision – High-Quality Torsion Springs!

Product Details
Customization: Available
Function: Pressed
Material: Steel
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  • Power Your Motion with Precision – High-Quality Torsion Springs!
  • Power Your Motion with Precision – High-Quality Torsion Springs!
  • Power Your Motion with Precision – High-Quality Torsion Springs!
  • Power Your Motion with Precision – High-Quality Torsion Springs!
  • Power Your Motion with Precision – High-Quality Torsion Springs!
  • Power Your Motion with Precision – High-Quality Torsion Springs!
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  • Overview
  • Product Description
  • Our production
  • Our quality control
  • Packaging & Shipping
  • Applications
  • Company Profile
  • FAQ
Overview

Basic Info.

Model NO.
torsion
Usage
Industrial, Auto, Furniture, Motorcycle
Load Type
Compression
Production Process
Cold Roll
Shape
Cylinder
Transport Package
Carton Pallet
Specification
100 x110x120
Trademark
Bosswinn
Origin
China
Production Capacity
2000000

Packaging & Delivery

Package Size
30.00cm * 25.00cm * 45.00cm
Package Gross Weight
5.000kg

Product Description

 
Product Description

Bosswinn Torsion Ramp Springs - Precision-Tuned for Rotational Force and Long-Term Performance

Bosswinn Torsion Ramp Springs are high-performance mechanical components designed to deliver controlled rotational energy for a wide variety of applications, including automotive, machinery, doors, ramps, and industrial systems requiring precise torque. Engineered with accuracy and reliability in mind, these springs provide consistent torsional force, smooth operation, and long-lasting stability even in the most demanding environments.

Crafted from premium materials such as stainless steel, hardened carbon steel, or phosphor bronze, and finished with advanced protective coatings, Bosswinn Torsion Ramp Springs are built to withstand corrosion, wear, and mechanical fatigue. Their coiled structure and tightly controlled winding angles ensure optimal torque output, dependable performance, and a long service life.

The design allows for efficient energy storage and release during angular movement, making installation easier and operation smoother. Whether used in loading ramps, industrial doors, or rotational mechanisms, Bosswinn Torsion Ramp Springs are a trusted solution for high-load, high-precision needs.


Power Your Motion with Precision – High-Quality Torsion Springs!

Bosswinn Torsion Ramp Springs - Key Features

Controlled Rotational Force
Designed to deliver precise torque and angular motion control, ensuring reliable performance in rotating or pivoting applications.

Premium-Grade Materials
Manufactured from high-quality carbon steel, stainless steel, or specialty alloys with anti-corrosion surface treatments to ensure long-lasting durability.

Outstanding Fatigue Life
Built to endure millions of cycles without significant performance loss-ideal for demanding environments that require repeated motion.

Fast and Easy Assembly
Engineered for quick installation into shafts, hinges, or mechanical interfaces, reducing labor time and improving productivity on the assembly line.

Reliable in Extreme Conditions
Performs consistently under fluctuating temperatures, high stress, and exposure to moisture or chemicals-suitable for both indoor and outdoor use.

High-Precision Coiling and Bending
Produced using CNC coiling and forming processes for exacting tolerances, ensuring consistent torque output and seamless integration into mechanical systems.

Wide Range of Applications
Used in ramps, lids, access panels, automotive assemblies, agricultural equipment, door mechanisms, and heavy-duty machinery.

Tailor-Made Solutions
Offered in various coil diameters, leg lengths, wind directions, and torque specifications. Custom designs available to meet unique OEM and industry requirements.

Bosswinn Torsion Ramp Springs - Technical Specifications
Precision-Engineered for Controlled Motion and Torque Modulation

 

RAW MATERIAL PARAMETERS

Material Type Common Grades Surface Treatment Key Properties
Stainless Steel SUS301, SUS304, SUS316 Passivation, Electropolishing Excellent corrosion resistance, consistent spring torque
Carbon Steel 65Mn, 70#, SK5 Phosphating, Black Oxide, Zinc Plating High fatigue strength, reliable under cyclic loading
Phosphor Bronze C51000, C52100 Natural Finish, Tin Coating Stable under varying temperatures, low friction coefficient
  • Material Thickness: 0.3 mm - 3.0 mm

  • Hardness Range: HRC 40-55 (depends on material and heat treatment)

  • Tensile Strength:

    • Stainless Steel: 900-1200 MPa

    • Carbon Steel: 1200-1600 MPa

    • Phosphor Bronze: 400-800 MPa

 

FINISHED PRODUCT PARAMETERS

Parameter Typical Range / Options Notes
Torque Output 0.05 Nm - 10 Nm (customizable) Based on material, coil diameter, and arm length
Coil Diameter 5 mm - 50 mm Inner or outer diameter depending on design
Arm Length 10 mm - 150 mm Designed to interface with cam profiles or levers
Winding Direction Left-hand, Right-hand Application-specific
Surface Coating Zinc, Nickel, Black Oxide, Dacromet Improves durability and corrosion resistance
Cycle Life > 200,000 cycles Designed for high-repetition motion
Tolerances ±0.03 mm (diameter), ±2° (angle) Precision coiling and forming ensures consistency
Working Temperature -40°C to +250°C Suitable for automotive and industrial environments
 

OPTIONAL CUSTOMIZATIONS

  • Multi-arm Configuration: Double-leg, offset-leg, or custom-leg styles

  • End Forming: Hooks, tangs, or machined ends for application fit

  • Pre-Tensioned Design: For increased torque in smaller envelopes

  • Logo Stamping: For traceability and branding

  • Packaging Options: Bulk, tray-packed, or automated line compatible

 

Our production

 



Power Your Motion with Precision – High-Quality Torsion Springs!

Bosswinn Torsion Ramp Springs - Production Process Flow

 

1. Raw Material Inspection & Preparation

Incoming Quality Control (IQC):

  • Validate material grade and supplier certificates (e.g., 55CrSi, 60Si2Mn).

  • Measure wire diameter, tensile strength, surface hardness, and straightness.

  • Inspect for surface defects: rust, pitting, cracks, or dents.

Surface Cleaning (if required):

  • Degreasing, pickling, or shot blasting to remove scale and ensure a clean surface before coiling.

 

2. Wire Cutting / Pre-Coiling Setup

Equipment: Automatic wire feeders, cutting machines.

Action: Wire is straightened and cut to predetermined lengths if not coiled from spools.

Tolerance: Length accuracy within ±0.1 mm to ensure precise coil geometry.

 

3. Coiling / Torsion Forming

Process:

  • CNC-controlled spring coiling machines or custom mandrel setups for ramp profile.

  • Torsion arms are formed with precise angular deflection based on ramp angle.

Parameters:

  • Arm angle, coil diameter, number of coils, and leg position are precisely programmed.

  • Tolerance: ±0.05 mm on dimensions; ±1° on leg angles.

 

4. Heat Treatment

Purpose: To achieve required hardness, elasticity, and fatigue strength.

Methods:

  • Stress relieving after forming

  • Hardening & tempering for critical load-bearing applications

Temperature Range: 400°C-600°C, depending on spring material and load rating.

Verification:

  • Rockwell or Vickers hardness test

  • Torsion load test at specified deflection

 

5. Surface Treatment / Coating

Options:

  • Zinc plating (bright or yellow), Black oxide, Phosphate coating, or Powder coating

Function:

  • Corrosion resistance

  • Enhanced surface finish

  • Improved fatigue life

Testing:

  • Salt spray resistance (48-96 hrs)

  • Coating thickness gauge

  • Adhesion test (tape pull or scratch test)

 

6. Secondary Machining / Arm Customization

Operations (if needed):

  • End grinding, leg trimming, hole drilling or slotting

  • Welding or rivet attachment if torsion spring is part of an assembly

Tools: High-precision grinders, punch presses, or CNC milling.

Quality Control: Angle verification, length measurement, and alignment check.

 

7. Final Inspection & Testing

Mechanical Tests:

  • Torque vs. deflection test

  • Fatigue life testing (100,000+ cycles)

  • Angle and leg position verification

  • Dimensional accuracy (length, coil diameter, leg offset)

Visual Inspection:

  • Surface finish, coating quality, presence of cracks or deformation

  • Burrs, sharp edges, and coil uniformity

Identification:

  • Laser engraving or marking with part number, batch code, or logo

 

8. Packing & Shipping

Packing Options:

  • PE bags in export cartons

  • Compartment trays for torsion arm protection

  • Customized packing as per client request

Labeling:

  • Product name, material grade, batch number, quantity, and specification

Logistics:

  • Export compliance (RoHS/REACH if required)

  • Domestic or international shipment scheduling

Our quality control

 



Power Your Motion with Precision – High-Quality Torsion Springs!

Bosswinn Torsion Ramp Spring Quality Control Strategies

 

1. Incoming Quality Control (IQC)
Objective: Ensure only qualified materials are used in torsion ramp spring production.

Key Actions:
Material Certification Review - Confirm material type and traceability (e.g., 55CrSi, 60Si2Mn, stainless steel grades).
Physical Property Testing:

  • Hardness Test - Rockwell or Vickers methods

  • Tensile Strength Check - Validate supplier claims

  • Wire Diameter and Cross-Sectional Roundness - Micrometer, laser gauge
    Visual Inspection:

  • Detect surface defects such as rust, decarburization, cracks, or scale

 

2. In-Process Quality Control (IPQC)
Objective: Maintain consistent quality throughout the forming and heat treatment process.

Process Checkpoints & Quality Controls:

Stage Inspection Focus Tools/Methods
Coiling Coil diameter, pitch, leg orientation Caliper, coil gauge, visual check
Heat Treatment Torsional strength, stress relief Hardness tester, microstructure check
End Grinding / Trimming Flatness, parallelism, burr-free finish Surface plate, dial indicator
Surface Treatment Coating adhesion, corrosion resistance Salt spray test, thickness gauge
Assembly (if applicable) Leg position, pre-load accuracy Torque wrench, angle gauge
 

3. Final Quality Control (FQC)
Objective: Verify all torsion ramp springs meet Bosswinn standards before shipment.

Key Testing Items:
Dimensional Inspection

  • Coil outer diameter, wire diameter, arm length, angles

  • Tolerance control: ±0.05 mm or as specified
    Spring Torque Test

  • Measure initial torque and working torque under load
    Fatigue / Lifecycle Testing

  • Simulated ramp cycles: ≥100,000 without loss of performance
    Surface Finish Verification

  • No sharp edges, cracks, or coating defects
    Load-Deflection Curve Comparison

  • Match to engineered curve or customer requirement

 

4. Corrective & Preventive Actions (CAPA)
• Perform root cause analysis for defects (e.g., coil irregularity, torque deviation)
• Adjust forming tooling, heat treatment parameters, or material source
• Introduce in-line monitoring for high-risk processes
• Regular QC training and performance audits for production staff

 

5. Optional Customer-Specific Quality Tests
Salt Spray Test (ASTM B117 - 96 to 240 hours)
REACH / RoHS Compliance documentation
Custom Torque Curve Testing based on client application
Full Lifecycle Simulation (rotational cycles, applied torque loading)

 
Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!


 
Packaging & Shipping

 


Power Your Motion with Precision – High-Quality Torsion Springs!

 1. Packaging & Pre-Shipment Inspection (PSI) Goal:

Confirm correct quantity, labeling, and packaging integrity.
Checklist: •  Product label (part number, batch code)  •  Correct quantity per box/carton  •  Packaging damage check  •  Visual inspection for surface finish & cleanliness    

2. Documentation & Traceability •  QC Records:

Maintained for each batch (dimensions, material batch, test results)  •  Barcode or Serial Numbering (if required)  •  Certificates:
- Material Certificate
- Heat Treatment Report
- Coating Certificate
- QC Inspection Report    
 
Applications

 

 

Bosswinn Clip Spring Applications - Reliable Clamping, Everywhere It Counts

Bosswinn Clip Springs are versatile fastening components engineered for secure, reusable, and vibration-resistant connections across a wide range of industries. Their spring-loaded design ensures a strong and consistent clamping force without the need for permanent fixtures like screws or rivets.

Designed for easy installation, long-term durability, and reliable performance under dynamic conditions, Bosswinn Clip Springs serve as a vital component in both mass production lines and custom assembly systems.

Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!
Power Your Motion with Precision – High-Quality Torsion Springs!

Key Application Sectors

 

Automotive

  • Securing trim panels, dashboard components, and wire harnesses

  • Fastening HVAC ducts, filter housings, and underbody shields

  • Vibration-resistant mounts for interior/exterior parts

Construction & Building Materials

  • Fixing wall panels, ceiling frames, ducts, and insulation boards

  • Supporting cable trays, pipelines, and framing systems

  • Quick-clip installation for modular structures

Consumer Electronics & Appliances

  • Assembly of internal components in washing machines, refrigerators, air conditioners

  • Mounting printed circuit boards (PCBs), casings, and control modules

  • Snap-on parts for easy service and disassembly

Electrical Systems & Enclosures

  • Holding wires, conduits, or busbars in switchboards or junction boxes

  • Mounting electrical components on DIN rails or enclosures

  • Ensuring safe, tool-less installations in compact spaces

Railway & Transportation Equipment

  • Mounting panels, lighting systems, and cable management systems

  • Withstanding shocks, vibrations, and thermal expansion environments

  • Durable fastening under heavy-duty conditions

Industrial Machinery

  • Tool-less fixture of guards, access covers, or service panels

  • Vibration-absorbing fasteners in dynamic assemblies

  • Repeatable locking mechanisms for maintenance-friendly design

 

Company Profile

Power Your Motion with Precision – High-Quality Torsion Springs!

About Zhuji Bosswinn Springs - Professional Spring Solutions Provider

Zhuji Bosswinn Springs Co., Ltd. is a trusted manufacturer specializing in the design, development, and production of high-performance spring components. With advanced facilities and experienced engineers, we provide customized and standard solutions for various industries.

Our Core Services Include:

  • Custom Spring Manufacturing
    Precision-made compression springs, tension springs, torsion springs, and wire forms based on your drawings or samples.

  • Damping, Suspension & Brake Chamber Springs
    Engineering and mass production of springs for automotive, truck, and industrial damping systems.

  • OEM & ODM Services
    Full support from concept design to finished product, including tooling development and sample validation.

  • CNC Machining & Stamping Parts
    Production of precision-machined and punched metal components to complement spring assemblies.

  • Surface Treatment & Heat Treatment
    In-house processes including tempering, black oxide coating, powder coating, and plating to enhance durability and corrosion resistance.

  • Quality Control & Testing
    Comprehensive QC procedures, including load testing, fatigue testing, dimensional inspection, and material certification.

 

Zhuji Bosswinn is committed to on-time delivery, stable quality, and responsive customer service for both domestic and international clients.

 
FAQ

 

Bosswinn Torsion Ramp Spring Quality Control Strategies

1. Is Bosswinn a Manufacturer of Torsion Ramp Springs?

A: Yes, Bosswinn is a professional manufacturer specializing in precision torsion ramp springs. With over a decade of industry experience, we serve a wide range of applications including automotive mechanisms, industrial assemblies, and mechanical actuators.

Our vertically integrated production system includes:

  • Advanced wire coiling and torsion forming lines

  • CNC torsion spring winders and torque-setting machines

  • In-house heat treatment and stress relieving

  • Specialized labs for torque, cycle life, and corrosion resistance testing

We maintain full process control-from certified wire to packaged finished parts-to ensure performance consistency and on-time delivery.

 

2. What Are the Main Applications of Torsion Ramp Springs?

A: Bosswinn torsion ramp springs are widely used in:

  • Automotive Systems: Clutch assist mechanisms, gear shift detents, seating assemblies

  • Industrial Equipment: Loading ramps, control arms, cam mechanisms

  • Agricultural Machinery: Gate latches, spring-loaded arms

  • Medical Devices: Adjustable support hinges, torque-sensitive components

  • Custom Assemblies: Precision force control in rotating and pivoting systems

 

3. What Are Your Lead Times?

A:

  • Standard models: 10-20 working days

  • Custom designs: 20-35 working days, based on tooling and volume

  • Urgent projects: Expedited manufacturing is available upon request

Production is tracked with ERP systems for real-time progress updates.

 

4. What Is the Minimum Order Quantity (MOQ)?

A:

  • Prototype & New Clients: 100 pcs or fewer

  • Mass Orders: 5,000-10,000 pcs (optimal cost and efficiency)

  • Custom Projects: MOQ depends on complexity and setup cost

We remain flexible to support your project stage and demand scale.

 

5. What Are Your Payment Terms?

A:

  • T/T (Telegraphic Transfer): 30% deposit, 70% before shipment

  • L/C: Available for large-scale or government projects

  • Western Union / MoneyGram: Suitable for small batches or samples

Custom terms can be arranged for long-term partners.

 

6. Do You Offer Samples?

A:
Yes. Free samples are provided for standard torsion spring types.
Custom-designed samples (based on drawings/specs) can be delivered within 5-10 working days.
All samples are tested for:

  • Torque force consistency

  • Angle of deflection

  • Dimensional accuracy

Mass production follows the approved sample specifications strictly.

 

7. What Materials Are Used for Torsion Ramp Springs?

A:

  • High-Carbon Spring Steel: 65Mn, 70#, or equivalent

  • Stainless Steel: SUS302, SUS304 - rust-proof, ideal for exposed use

  • Oil-Tempered Wire: For high-cycle, heavy-load applications

Surface treatments include black oxide, zinc plating, dacromet, or epoxy coatings based on end-use.
All materials are certified and traceable back to approved mills.

 

8. How Do You Ensure Product Quality?

A:
Quality is enforced throughout production via:

  • Incoming Material Control: Chemical composition and tensile strength tests

  • In-Process Checks: Angle, torque curve verification, winding accuracy

  • Final Testing:

    • Torque calibration within ±5% tolerance

    • Load-deflection testing

    • Fatigue life simulation (100,000-1 million cycles)

    • Surface finish and corrosion testing (salt spray)

Certifications: ISO 9001, RoHS, Material Reports, PPAP (as requested)

 

9. Can You Support Custom Design?

A:
Absolutely. Bosswinn's engineering team provides:

  • Torque & Deflection Simulations

  • 2D/3D Modeling based on samples or concepts

  • Reverse Engineering for legacy or imported components

  • Design Optimization for load handling, spring angle, and material savings

We work in SolidWorks, UG, AutoCAD, and support rapid prototyping as needed.

 

10. Do You Export Torsion Springs Worldwide?

A:
Yes. Bosswinn serves clients across:

  • Europe: Germany, Italy, Poland, Netherlands

  • North America: USA, Canada, Mexico

  • Asia & Middle East: Japan, South Korea, UAE

  • Others: Brazil, Australia, South Africa

We provide full logistics support including:

  • Commercial Invoice & Packing List

  • Certificate of Origin (CO)

  • HS code matching & Custom declarations

  • Shipment under FOB, CIF, or DDP terms as required

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