High-strength spiral bolts Trustworthy CNC machined alloy steel anti-loosening connectors for heavy equipment.

We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China.

Core Advantages and Technical Features of CNC Machining of spiral bolts

I. Ultimate Pursuit of Geometric Accuracy and Thread Quality

1. The most significant advantage of CNC machining of spiral bolts lies in its exceptional thread accuracy and geometric consistency. Using high-precision CNC lathes and thread machining centers, the thread pitch diameter tolerance can be stably controlled within the 6g/6H standard, and the pitch error ≤0.01mm/25mm.

2. The high consistency in mass production is particularly outstanding. In the mass production of key bolts for automotive engines, the thread parameter dispersion of 10,000 products does not exceed 0.008mm.

3. The precision control capability of the thread demonstrates technical strength. The tool exit path is precisely controlled through CNC programming.

High-strength spiral bolts CNC machined alloy steel anti-loosening connectors for heavy equipment.

II. Integrated Machining of Complex Structures and Functional Features

1. CNC machining technology has transformed spiral bolts from simple fasteners into multifunctional integrated components. The flange and thread of flange bolts are machined in a single clamping operation, with the perpendicularity of the flange end face to the axis ≤0.02mm, and the width accuracy of the sealing groove on the flange back ±0.02mm.

2. Precision forming of hollow bolts. Deep hole machining technology allows for the fabrication of through holes or blind holes with diameters of 2-8mm inside slender bolts, with depths exceeding 100mm. The coaxiality between the hole axis and the bolt's outer diameter is ≤0.03mm. Hollow bolts for aero-engines serve both as fasteners and oil passages, reducing the number of parts and structural weight.

3. Precise realization of multi-segment structures with varying diameters. CNC turning centers allow for the machining of multiple shaft segments of different diameters on the same bolt, with coaxiality between segments ≤0.01mm and transition fillet radius accuracy ±0.05mm.

III. Full utilization of material properties

1. Alloy steel materials are fully utilized in CNC machining. spiral bolts with a hardness of HRC32-38 after heat treatment are precision-machined using hard-state turning technology, achieving a surface roughness Ra0.8μm, avoiding grinding burns, and increasing fatigue strength by 30%.

2. Titanium alloy materials exhibit outstanding precision machining capabilities. TC4 titanium alloy bolts are machined stably on CNC machine tools using a low-speed, high-feed strategy, combined with specialized cutting tools and high-pressure cooling. Aerospace-grade titanium alloy bolts achieve a residual compressive stress of over -300MPa after machining, significantly improving fatigue resistance.

3. The corrosion resistance of stainless steel is fully utilized. 316L austenitic stainless steel bolts achieve a smooth surface (Ra 0.4μm) through precision machining, reducing the adhesion points of corrosive media.

IV. Synergistic Optimization of Heat Treatment and Machining

1. Perfect coordination between tempering and finishing. A 0.3-0.5mm finishing allowance is left after rough machining, followed by precision machining after heat treatment. This eliminates the effects of heat treatment deformation and ensures final dimensional accuracy.

2. Integrated application of surface strengthening technology. Thread rolling is performed after CNC machining. After rolling, the thread root R angle is precisely controlled, achieving a residual compressive stress of over -600MPa.

3. Precise control of anti-loosening coating. The threaded surface can be machined with micro-oil reservoirs or coated with pre-applied adhesive, with a coating thickness accuracy of ±0.01mm and precise positioning.

V. Precision Machining of Special Thread Forms

1. Precise Realization of Non-standard Threads. Trapezoidal threads, sawtooth threads, and circular arc threads, among other special tooth profiles, are precisely formed through CNC machining, with a tooth profile profile error ≤0.02mm.

2. Precision Control of Multi-start Threads. Multi-start thread splitting is precisely achieved through CNC indexing, with a splitting accuracy of ±0.5° and consistent lead for each thread.

3. Innovative Machining of Variable Pitch Threads. CNC machining can realize threads with continuously varying pitch to meet special transmission requirements.

VI. Surface Integrity and Quality Control

1. Precise Control of Surface Microstructure. Ideal surface texture direction can be obtained by optimizing cutting parameters. Transverse texture is beneficial for lubricant retention, reducing the coefficient of friction by 20%; longitudinal texture is beneficial for stress distribution, improving fatigue life.

2. Precise Control of Work-Hardened Layers. Reasonable cutting depth and feed rate can form a uniform hardened layer on the surface, with a depth of 0.05-0.1mm, increasing hardness by 15-20%. High-strength bolts, after CNC machining, exhibit improved wear resistance and enhanced anti-galling ability.

3. Full-process digital quality control. An online measurement system automatically detects key dimensions every 50 pieces machined, compensating for tool wear in real time. A thread comprehensive measuring instrument detects various parameters to ensure 100% compliance with standard requirements.

With the continuous development of intelligent manufacturing technology and surface engineering technology, CNC-machined spiral bolts will continue to evolve towards higher strength, greater intelligence, and longer service life.

Company Profile

    We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China. We have advanced high-end professional production and processing technology, and are committed to innovative R&D and production. After years of  market tempering and exploration, it has high-quality   technical management personnel, experienced designers, R&D personnel and a   perfect company management system cnc precision.

5-axis CNC workshop

         Our factory has a plant area of about 2,000 square meters and masters core processing technologies. It has high-end precision production equipment cnc precision: CNC lathes, 5-axis CNC, 4-axis CNC, stamping equipment, die-casting equipment, etc. 2.5-dimensional detection equipment ​

two-dimensional testing

cnc precision surface treatment

          For surface treatment, our suppliers have been working with us for many years. They have rich experience and are familiar with all the quality requirements of each other. The quality is stable and more guaranteed. Such as: heat treatment, spray painting, powder coating, blackening, silver/gold plating, electrolytic polishing, nitriding, phosphating, nickel/zinc/chromium/TiCN plating, anodizing, polishing, passivation, sandblasting, galvanizing, heat treatment , hardening, laser marking, etc. according to customer requirements. Aluminum alloy surface oxidation

Product Packaging

Packaging Details

1. Commercial packaging: 1pc/plastic bag + color box +carton + pallet;
2. Industrial packaging: (1). plastic tube + carton + pallet; (2). plastic bag + kraft paper + carton + pallet;
3. According to the requirement of customer.

FAQ

Q1: Where can I get product & price information?

A1: Send us an inquiry e-mail, we will contact you once we received your mail.

Q2: How long will I get the sample?

A2: Depends on your specific items, within 3-7 days generally.

Q3: What kinds of information do you need for a quote?

A3: Kindly please provide the product drawings in PDF, if provide in STEP or IGS will be better.

Q4: What are the payment terms?

A4: We accept 50% as a payment deposit, when the goods are prepared, we shoot photos or videos for your check, and then you can pay the balance. For small quantities, we accept Paypal, the commission will be added to the order. For big amounts, T/T is preferred.

Q5: How to deliver the goods?

A5: We deliver the products by courier company.

Q6: Are you a trading company or factory?

A6: We are factory direct with 17 experienced engineers and more than 50 employees as well approximate 3,000m2 workshop area.

Q7: What shall we do if we don't have drawings?

A7: Please send your sample to our factory, then we can copy and provide you better solutions. If send us pictures or drafts with dimensions(Length, Height, Width), CAD or 3D file will be made for you.

Q8: Can we get some samples before mass production?

A8: Absolutely yes.

Q9: Will my drawings be safe after sending them to you?