Self-reversing screws,also widely known as level winder screws,are precision linear motion components with a unique working principle:the nut block can automatically achieve reciprocating back and forth movement simply by rotating the screw in one constant direction,without the need to reverse or change the screw's rotation direction.This exceptional mechanism makes them indispensable in countless pieces of industrial and mechanical equipment.

 

For businesses seeking reliable,high performance self-reversing screws backed by professional expertise and consistent quality,LMT stands out as the top choice.With years of specialization,technological innovation,strict quality control,and full customization capabilities,we deliver solutions that meet even the most demanding application requirements.

15 Years of Specialization & Industry-Leading Patents

LMT has focused exclusively on the R&D and manufacturing of level winder lead screws for 15 years,making us one of China's most experienced and innovative manufacturers in this field.We hold the largest number of patents and invention certificates for self-reversing screw technology domestically,with continuous investment in technical optimization and performance upgrades.As a key enterprise supported by the local government,we maintain a strong commitment to advancing screw design,production processes,and application solutions to stay ahead of industry demands.

Beyond Manufacturing: Design Optimization & Engineering Partnership

Unlike some suppliers who only produce to drawings,LMT acts as your engineering and design partner.We not only manufacture according to your drawings and specifications but also provide professional design support,prototype development,and existing structure optimization.

Our technical team comprises senior specialists with 15 years of dedicated experience in self-reversing screw systems,as well as professional mechanical engineers with strong expertise in equipment structure and motion design.We thoroughly evaluate the rationality,stability,and durability of your current design, identify potential risks or inefficiencies,and deliver practical,performance-improving solutions.

 

Extensive Project Experience Across Diverse Industries

With more than 500 completed projects,LMT has accumulated rich,real-world application experience across a wide range of demanding industries,including:

- Marine & port machinery

- Heavy-duty winch systems

- Oil & gas equipment

- Textile machinery

- UAV and precision motion systems

- Treadmills and fitness equipment

- Water filtration & industrial treatment systems

This broad experience allows us to understand unique industry challenges and provide targeted,reliable solutions for even the most complex applications.

 

Certified Production Facilities & Strict Management

Our 3,000 ㎡ modern manufacturing facility operates under certified ISO 9001 quality management systems,supported by professional processing equipment and semi-automated production lines.With standardized workflows and strict on-site management,we ensure stable,high-efficiency production while maintaining consistent quality across every order.

 

Full Customization for Every Application

 We fully support customized solutions to match your exact operational needs:

- Custom shaft end designs

- Custom block nut dimensions

- Custom surface coatings and treatments

- Diameter range from 10 mm to 200 mm to cover light-duty to heavy-duty applications

 

Wide Selection of High-Quality Materials

LMT offers an extensive range of premium material options to suit different environments — from corrosion-resistant marine use to high-strength heavy-duty operation.

- Self-reversing screw materials: C45,SS304,440C,SS316,SS316L,40Cr,titanium alloy,2507 duplex stainless steel,GCr15,POM

- Block nut materials: brass,bronze,aluminum,C45 steel,SS304,440C,SS316,SS316L,POM, PEEK, nylon

 

Multi-Stage Strict Quality Control System

Quality is non-negotiable at LMT.Every level winder lead screw undergoes a rigorous quality assurance process:

(1)Raw Material Control

We purchase raw materials only from qualified high-quality suppliers.Each batch of materials has complete material certification,material test report and quality inspection certificate.As an example,please refer to the material inspection report shown in the picture below. 

(2)Professional Testing
We use professional testing equipment and tools to strictly inspect product size,appearance and performance.

(3)100% Double Inspection
Every self-reversing screw goes through 100% inspection.First,our factory conducts initial inspection; then the export department does secondary inspection.Products are delivered only after both inspections are passed and results are confirmed correct.

(4)Operation & Function Test Videos
We will send customers operation videos of self-reversing screws,pawl and nuts,together with function test videos and pictures.Below is the pre-shipment test video of our self-reversing screw,verifying its smooth operation without any sticking or jamming.

(5)Product & Packaging Details Confirmation
We will send customers detailed product pictures and all packaging pictures before shipment to ensure all details meet customer requirements.

Fast Lead Times & Low MOQ

We understand the urgency of project timelines and the need for flexible ordering:

- Fast production lead time: Only 15 days for standard and customized orders

- Low minimum order quantity:Just 1 set per order,ideal for prototyping,testing,and small-batch trials

 

LMT is more than a supplier — we are a trusted partner dedicated to delivering high-quality self-reversing screws,engineering expertise,and reliable service that helps your equipment perform better and last longer.Whether you need standard components,fully customized solutions,or professional design optimization,we have the experience,technology,and capacity to support your success.

 

Contact LMT today to discuss your self-reversing level winder screw requirements,request a detailed quote,or partner with our engineering team for a optimized motion solution.Let us help you enhance performance,reduce risks,and achieve stable,long-term operational excellence.