Customized High Quality Precision 5-axis CNC Knurled Shaft Parts, OEM Parts

Customized High Quality Precision 5-axis CNC Knurled Shaft Parts OEM Parts

Knurling is a machining process that creates a pattern or tooth shape on a shaft surface through a rolling process. It is often used to enhance grip or improve aesthetics. The process includes material selection, turning, knurling (using straight or mesh knurling tools), finishing, and quality inspection. Knurled shaft processing offers advantages such as high efficiency, wear resistance, and anti-slip properties, making it widely used in the manufacture of tools, hardware, and transmission components.

Product Description 

Knurled Shaft Processing: Analysis of Precision Manufacturing and Surface Treatment Technologies
Knurled shafts are key components widely used in mechanical transmissions, electronic equipment, and automated assembly. Their knurled surface enhances friction and ensures smooth transmission. The knurled shaft manufacturing process utilizes advanced technologies such as CNC precision turning, five-axis machining, and surface electroplating to ensure high precision and durability.

Core Processing Techniques for Knurled Shafts
1. CNC Precision Turning
Knurled shaft blanks are typically machined from high-quality die steel (such as SKD11) or brass (H59). First, precision turning is performed on a CNC lathe to ensure the shaft’s cylindricity (≤0.01mm) and dimensional tolerance (±0.02mm). During the turning process, cutting parameters (e.g., rotational speed of 800-1200rpm, feed rate of 0.1mm/r) must be strictly controlled to prevent material deformation and burrs.

Customized High Quality Precision 5-axis CNC Knurled Shaft Parts OEM Parts

2. Five-Axis CNC Precision Knurling

Traditional knurling processes use extrusion molding, but high-precision knurled shafts require precision milling or engraving using a five-axis CNC machine to ensure uniformity and depth consistency (typically 0.2-0.5mm) of the pattern (straight, cross, or diagonal lines). Five-axis machining can produce complex knurl structures in a single process, eliminating secondary clamping errors and is particularly suitable for knurled shafts with special shapes or keyways.

3. Heat Treatment and Surface Hardening

For high-load transmission knurled shafts, tempering heat treatment (quenching and tempering) is required to achieve a hardness of HRC 45-50 and improve wear resistance. Some precision shafts also require nitriding to form a 0.1-0.3 mm hardened layer on the surface to extend their service life.

4. Surface Plating
To enhance rust resistance and aesthetics, knurled shafts are typically nickel- or chrome-plated.

Nickel plating: Improves corrosion resistance and is suitable for precision shafts used in electronic equipment.

Hard chrome plating: Surface hardness can reach HV900 and is suitable for high-wear environments, such as drive shafts in automated assembly machines.

Applications of Knurled Shafts
Electronic Equipment: Used in feed rollers and tension adjustment shafts in SMD placement machines, ensuring precise transmission.

Mechanical Transmission: Used as drive shafts in handles and knobs, enhancing grip friction.

Automated Equipment: Provides stable torque transmission in robot joints and conveyor belt adjustment mechanisms.

Industry Trends
Combined Processing Technology: Combining 3D printing and five-axis CNC systems enables the manufacture of lightweight, custom-shaped knurled shafts.

Intelligent Inspection: Utilizes machine vision to automatically inspect knurl pattern quality, improving yield.

Environmentally friendly surface treatment: new processes such as cyanide-free electroplating and PVD coating comply with RoHS environmental protection requirements.

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