Carbon Steel Trapezoidal Lead Screw

The defining feature of this China Carbon Steel Trapezoidal Lead Screw from Suzhou Maitu is its thread angle for 30 degrees. Distinguished with the sharper V-threads used for fastening, the trapezoidal screw has a 30° included thread angle (flank angle) and a root and crest that are parallel to the screw's axis. This specific geometry, standardized in many international systems such as the ISO metric trapezoidal screw, is designed specifically for power transmission and load-bearing purposes. The name "trapezoidal" derives from the trapezoidal shape of the thread profile when viewed in cross-section.

Product Advantages

① Superior Cost-Performance Ratio: Crafted from high-quality carbon steel (C45, S45C, 1045), the product delivers excellent load-bearing capacity and power transmission performance, while maintaining a more competitive price compared to stainless steel alternatives—perfectly fitting buyers’ demand for high performance and cost control.

② Optimized 30° Thread Geometry: Adopts ISO metric standard 30° included flank angle, with thread root and crest parallel to the screw axis; this trapezoidal design reduces stress concentration, enhances wear resistance, and ensures stable power transmission in heavy-load scenarios, superior to sharp V-threads for fastening.

③ Flexible Material Customization: Beyond standard C45 (S45C/1045) carbon steel, we support customized carbon steel grades (lower or higher carbon content) according to customers’ specific load, hardness, and machinability requirements, maximizing product adaptability.

④ Reliable Self-Locking Safety: Retains the inherent self-locking capability of trapezoidal screws, ensuring non-reversibility—force applied to the nut will not cause reverse rotation, providing critical safety for vertical lifts, jacks, and precision positioning systems, with lead angle strictly controlled below 5° for optimal self-locking efficiency.

⑤ Excellent Machinability & Compatibility: Carbon steel material features superior machinability, allowing for precise thread rolling, end machining (chamfering, drilling, keyway), and seamless matching with brass, bronze, or engineered polymer nuts, reducing assembly difficulty and improving system stability.

⑥ Scalable Specification Range: Covers a wide range of standard and specific production parameters (major diameter 8mm-80mm, lead 1.5mm-12mm), with left-hand/right-hand configurations available, directly matching the needs of diverse industrial equipment.

Product Materials

The Carbon Steel Trapezoidal Lead Screw could be made for various materials. Typically, our production in carbon steel is for C45, which could be equal to 1045 or S45C. However, other carbon steel for lower or higher carbon portion could be discussed as your requests. For enhanced performance and longevity, the trapezoidal nut is often made from a softer, wear-resistant material like brass, bronze or an engineered polymer. We support customized end marching and nut shape manufacture as customers' drawings.

Why Choose Us

① 12+ Years of Carbon Steel Screw Specialization: We have focused on carbon steel trapezoidal lead screw R&D and production for over 12 years, mastering the core technology of carbon steel thread forming, material heat treatment, and precision control—with rich experience in matching carbon steel grades (C45, S45C, 1045) with different industrial scenarios.

② Advanced Carbon Steel Processing Capacity: Equipped with 10 professional production lines, including advanced thread rolling machines, high-precision CNC lathes, and carbon steel-specific heat treatment equipment, ensuring thread precision, dimension accuracy, and mechanical properties of the product; specialized testing equipment (thread gauge, hardness tester) ensures each product meets ISO 9001 standards.

③ Strict Quality Control & Traceability: Implemented a 3-stage quality inspection system (raw material, semi-finished product, finished product) with a 6-person professional QC team; all carbon steel raw materials are inspected and certified, and our self-developed ERP system realizes full-process traceability of production and quality, ensuring product consistency.

④ One-Stop Customization & Technical Support: Our 10 senior engineers provide professional customization services (material grade, thread parameters, end machining) and pre-sales technical consultation (self-locking calculation, material selection guidance), solving customers’ application pain points; we also offer free sample production for test verification.

⑤ Stable Supply & Global Service: With two factories (Suzhou, Dongguan), we achieve one-stop in-house production from raw material procurement to finished product delivery, avoiding quality risks from external cooperation; we have served over 5,000 domestic and foreign customers, completing over 80,000 pieces of overseas orders in 3 years, ensuring on-time delivery for both bulk and small-batch orders.

⑥ Proven Industry Reputation: Our trapezoidal lead screws are widely recognized in linear motion, lifting, and automatic machinery industries, with a focus on detail and customer drawings, earning consistent praise from global buyers.

FAQs

1. Can your carbon steel trapezoidal lead screws be used in outdoor or humid environments?

Yes. We can provide targeted surface treatments (zinc plating, black oxidation, nitriding) for carbon steel screws to enhance corrosion resistance, making them suitable for outdoor or humid workshops; we will recommend the most cost-effective surface treatment based on your specific environmental conditions and provide corrosion resistance test reports.

2. What is the difference between C45, S45C, and 1045 carbon steel for trapezoidal lead screws, and how to choose?

C45, S45C, and 1045 are equivalent carbon steel grades (medium carbon steel) with similar mechanical properties—high strength and good machinability. S45C is the Japanese standard, 1045 is the American standard, and C45 is the European standard; we can provide any of these grades according to your regional standards or equipment requirements, and offer material certification for each.

3. Do you support non-standard customization?

Yes. We fully support non-standard customization, including non-standard major diameter (over 80mm), lead, pitch, start number, and end machining; you only need to provide detailed drawings or requirements, our engineering team will design a suitable scheme, produce samples for your test verification, and carry out bulk production after confirmation.

4. What is the service life of your products under normal working conditions?

Under standard working conditions (normal lubrication, ambient temperature 0-40℃, rated load), the service life of C45/S45C/1045 carbon steel trapezoidal lead screws (with appropriate surface treatment) can reach 4-6 years; the specific service life depends on the application scenario and maintenance, and we provide a 12-month quality guarantee.