High-precision aluminum alloy splined shaft, manufactured using CNC machining technology – a professional OEM component manufacturer.

High-precision aluminum alloy splined shaft, manufactured using CNC machining technology – a professional OEM component manufacturer.

Knurled shafts are essential components in mechanical transmissions, electronic devices, and automated assembly systems. Their knurled surface design enhances friction, ensuring stable transmission. Advanced manufacturing processes, including CNC precision machining, five-axis machining, and surface plating, are used to guarantee high precision and durability.

Product Description 

Key Manufacturing Processes for Knurled Shafts

1. CNC Precision Machining
Knurled shaft blanks are typically made of high-quality aluminum alloys. First, a CNC lathe is used for precision machining to ensure shaft roundness (≤0.01mm) and dimensional tolerance (±0.02mm). During machining, cutting parameters (e.g., 800-1200 rpm speed, 0.1 mm/r feed rate) are strictly controlled to prevent material deformation and burrs.

High-precision aluminum alloy splined shaft, manufactured using CNC machining technology – a professional OEM component manufacturer.

2. Five-Axis Precision Knurling
Traditional knurling uses a rolling process. However, high-precision knurled shafts require five-axis machining for precise milling or engraving to ensure uniform and consistent knurling depth (typically 0.2-0.5mm) for straight, cross, or diagonal patterns. Five-axis machining completes complex knurling patterns in one operation, eliminating secondary clamping errors, especially suitable for splined shafts with special shapes or keyways.

3. Heat Treatment and Surface Hardening
For high-load transmission shafts, quenching and tempering heat treatment is used to achieve a hardness of HRC 45-50, improving wear resistance. Some precision shafts undergo nitriding, forming a hardened layer of 0.1-0.3mm for extended service life.

4. Surface Coating
To enhance corrosion resistance and aesthetics, knurled shafts are typically coated with nickel or chrome. Nickel plating: improves corrosion resistance, suitable for precision shafts in electronic devices. Hard chrome plating: achieves a surface hardness of up to HV900, suitable for high-wear environments, such as transmission shafts in automated assembly machines.

Applications of Knurled Shafts

Electronic Devices: Used in conveyor rollers and tension adjustment shafts for SMD pick-and-place machines, ensuring precise transmission.
Mechanical Transmissions: Used as transmission shafts for handles and knobs, enhancing grip and friction. Automation Equipment: Used in robotic joints and conveyor belt adjustment mechanisms to ensure stable torque transmission.

Industry Trends:
Composite Processing Technology: Combining 3D printing and five-axis CNC technology enables the production of lightweight, custom-shaped knurled shafts.
Intelligent Inspection: Utilizing machine vision technology for automatic inspection of knurled shaft surface quality, improving yield rates.
Environmentally Friendly Surface Treatment: New processes such as cyanide-free electroplating and PVD coating comply with RoHS environmental standards.

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.

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 lathes, 5-axis CNC, 4-axis CNC, stamping equipment, die-casting equipment, etc.​

Auxiliary production equipment: electroplating, anodizing, hard anodizing and surface treatment. We have complete testing equipment: sophisticated three-dimensional testing, two-dimensional testing, hardness tester, height meter, projector and other conventional testing equipment. If you are interested in our products, please contact me and I will provide the best price support and quality service.

2D inspection equipment

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?

A9: Yes, we will keep them well and won’t release them to the third party without your permission.

Q10: Is it possible to know the operation status of my products without visiting your company?

A10: We will offer a detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.

Q11: If you make poor quality goods, will you refund?

A11: In fact, we won’t take risks to produce poor-quality products. Meanwhile, we manufacture good quality products till you are satisfied.