Trapezoidal Screw with Surface Treatment

Quality Trapezoidal Screw with Surface Treatment from Suzhou Maitu factory is defined by its 30-degree thread angle. Unlike the sharp V-threads used for fastening, it has a 30°included flank angle, with root and crest parallel to the screw axis. This geometry—standardized in global systems like ISO metric trapezoidal screws—is purpose-built for power transmission and load bearing. The name "trapezoidal" comes from the thread’s trapezoid cross-sectional profile.

Product Features

① Standard 30° Thread Geometry: Adopts ISO metric standard 30° included flank angle, with thread root and crest parallel to the screw axis—this trapezoidal cross-section design is specifically optimized for power transmission and load-bearing, distinguishing it from sharp-edged V-threads used for simple fastening.

② Targeted Surface Treatment Portfolio: Offers a full range of professional surface treatment options (black oxidation, zinc plating, nickel plating, nitriding, carburizing, PTFE coating, QPQ), each tailored to solve specific environmental pain points (corrosion, wear, friction) of trapezoidal screws.

③ Inherent Self-Locking Safety: The Trapezoidal Screw with Surface Treatment retains the core self-locking capability of trapezoidal screws, ensuring non-reversibility—force applied to the nut will not cause the screw to rotate backward, providing critical safety for vertical lifts, jacks, and precision positioning systems.

④ Precise Linear Transmission: Through advanced thread rolling and CNC machining, thread pitch, lead, and dimension accuracy are strictly controlled, ensuring smooth and accurate conversion of rotational motion to linear motion for high-precision industrial applications.

⑤ Material-Surface Treatment Matching: Each surface treatment is scientifically matched with corresponding base materials (carbon steel, stainless steel, brass), maximizing the screw’s mechanical properties and service life based on application scenarios.

Product Advantages

① Enhanced Durability & Longevity: Advanced surface treatments form a dense protective layer on the screw surface, effectively resisting corrosion, abrasion, and friction—solving the problem of performance degradation of carbon steel screws in harsh environments, and extending service life by 30%-50% compared to untreated screws.

② Scenario-Adaptable Performance: Different surface treatments meet diverse application needs: QPQ for superior corrosion and wear resistance, PTFE coating for low friction and chemical resistance, nitriding/carburizing for enhanced hardness, and zinc/nickel plating for cost-effective anti-corrosion during long-distance transportation.

③ Cost-Effective Maintenance: The protective surface layer reduces daily maintenance frequency and costs, avoiding premature replacement of screws caused by corrosion or wear, and lowering the overall operational cost of industrial equipment.

④ Consistent Batch Performance: Strict quality control over surface treatment processes (coating thickness, uniformity, adhesion) ensures consistent performance across each batch, avoiding deviations that affect equipment operation stability.

⑤ Wide Industrial Compatibility: Our Trapezoidal Screw with Surface Treatment is suitable for various industrial scenarios requiring linear motion and load-bearing, including automatic machinery, lifting adjustment mechanisms, solar lifting parts, and precision stage platforms, matching the core needs of global procurement.

Why Choose Suzhou Maitu?

A key inherent trait of this Trapezoidal Screw with Surface Treatment is self-locking ability. This means force applied to the nut won’t cause the screw to rotate backward. This non-reversibility is critical for safety in vertical lifts, jacks, and positioning systems. However, self-locking efficiency drops as the lead angle increases, so the angle is usually kept under 5 degrees. We provide calculations to assist with your evaluation and selection.

However, especially for carbon steel trapezoidal screw, the inherent performance of the screw can be significantly compromised by environmental factors like corrosion, abrasion, and friction. Thus, advanced surface treatments is more critical as post-manufacturing process that applies a protective layer to the screw's surface, substantially enhancing its mechanical properties and service life.

Maitu owns a long story about many surface treatment as for black oxidation, zinc plating, nickel plating, nitriding, carburizing, ptfe coating and other requirements.

Factory Advantages

① 12+ Years of Surface Treatment Specialization: We have over 12 years of experience in trapezoidal screw production, with professional expertise in surface treatment technology—mastering the core process of matching surface treatments with base materials and application scenarios, which general manufacturers lack.

② Integrated Production & Surface Treatment Capacity: From raw material processing, thread forming to surface treatment, we achieve one-stop in-house production, avoiding quality risks caused by external cooperation and ensuring stable production lead times and consistent quality.

③ Advanced Equipment & Strict Testing: Equipped with 10 professional production lines, including advanced thread rolling machines, CNC lathes, and specialized surface treatment equipment (nitriding furnace, electroplating equipment, PTFE coating lines); professional testing equipment (salt spray tester, wear tester, hardness tester) ensures each surface treatment meets international standards.

④ Strict Quality Control System: Implemented under ISO 9001 quality management system, with a 6-person QC team conducting 3-stage inspection (raw material, semi-finished product, finished product); self-developed ERP system realizes full-process traceability of production and surface treatment.

⑤ Global Service & Flexible Supply: With two factories (Suzhou, Dongguan), we serve over 5,000 domestic and foreign customers, completing over 80,000 pieces of overseas orders in 3 years; we support both bulk and small-batch orders, ensuring on-time delivery and providing one-stop technical support.

FAQs

1. How do you recommend the most suitable surface treatment for my trapezoidal screw based on my application scenario?

Our technical team will conduct a detailed analysis of your application environment (corrosion level, friction requirements, temperature, transportation needs) and load conditions, then recommend the optimal surface treatment—for example, QPQ for strong corrosion scenarios, PTFE coating for low-friction precision equipment, and zinc plating for cost-effective long-distance transportation, and provide relevant performance test reports.

2. What is the service life of trapezoidal screws with different surface treatments under normal working conditions?

Under standard working conditions, the service life varies by surface treatment: zinc/nickel plating (2-3 years), black oxidation (1-2 years), nitriding/carburizing (3-5 years), PTFE coating (4-6 years), QPQ (5-7 years); we provide a 12-month quality guarantee for all products.

3. Can you provide customized surface treatment processes beyond the listed options (black oxidation, zinc plating, etc.)?

Yes. We can develop customized surface treatment processes according to your specific needs (e.g., special anti-corrosion coating for chemical environments, high-temperature resistant coating for high-heat scenarios); our R&D team will design the process, conduct tests, and provide samples for your verification before bulk production.

4. How do you ensure the adhesion of the surface treatment layer to the screw surface?

We strictly control the pre-treatment process (degreasing, derusting, pickling) before surface treatment of the Trapezoidal Screw with Surface Treatment to ensure the screw surface is clean and smooth; during treatment, we optimize process parameters (temperature, time, coating thickness) and conduct adhesion tests (scratch test, impact test) on each batch of products to ensure the surface layer does not peel or fall off during use.