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CNC Machining Of Large Industrial Rollers And Marine-Grade Flange Components
Precision CNC Machining Solutions
Our precision CNC machining solutions specialize in two high-demand product categories: Large Industrial Rollers and Marine-Grade Flange Components. These components are engineered for extreme operating environments, including steel manufacturing, paper production, offshore drilling platforms, and naval propulsion systems.
By combining state-of-the-art multi-axis CNC lathes, gantry mills, and on-site machining capabilities, we deliver products that meet stringent international standards for dimensional accuracy, material integrity, and corrosion resistance.
Our processes ensure that every roller achieves optimal dynamic balance and surface finish, while every flange provides pressure-tight sealing and long-term durability in saltwater or high-temperature conditions.
Epoxy / galvanic coatings with calibrated thickness
Product Advantages
For Large Industrial Rollers
Deflection-Free Machining: Hydraulic steady rests eliminate sagging during long-length turning, ensuring consistent roundness across the entire roller body.
High-Speed Material Removal: "Corn cob" and disc cutters increase roughing efficiency by 2x to 4x compared to conventional grooving tools.
Dynamic Balance Ready: Precision finishing minimizes runout, preventing vibration and product defects in high-speed production lines.
Wear-Resistant Surfaces: Hardened alloy options and coating applications extend service life in abrasive environments like steel rolling mills.
For Marine-Grade Flange Components
Corrosion Resistance: Certified duplex stainless steel and Inconel 625 provide superior chloride resistance for seawater systems.
Pressure-Tight Sealing: High-flatness flange faces (≤0.1 mm/m) and fine surface finishes ensure reliable gasket compression under extreme hydrostatic pressures.
Full Traceability: 100% material certification and NDT reporting (UT, LPI) meet DNV GL and ABS audit requirements.
Multi-Axis Complex Geometry: 5-axis CNC enables machining of irregular valve body flanges and deep bores in a single setup, reducing tolerance stack errors.
Shared Advantages
On-Site Machining Capability: Portable CNC units allow in-situ repairs and finishing of components up to 11 meters in diameter without disassembly.
ISO 9001:2015 Compliance: All processes validated with in-process probing and laser metrology.
Textile dyeing rolls, plastic film extrusion rollers
Custom CNC-machined rollers
Frequently Asked Questions
Q1: What is the maximum roller length you can machine in one setup?
A: Our largest CNC lathe can handle rollers up to 6,000 mm (20 ft) in a single setup. For longer assemblies or on-site applications, we offer portable machining solutions.
Q2: Do you provide marine classification society certification?
A: Yes. All marine-grade flanges can be supplied with DNV GL, ABS, or Lloyd's Register certification, including full material traceability and NDT reports (ultrasonic or liquid penetrant inspection).
Q3: Can you machine rollers made of hardened steel (HV 500+)?
A: Yes. We use CBN (cubic boron nitride) and ceramic tooling specifically for hardened alloys. Please provide your target hardness and wear layer depth for process optimization.
Q4: What is your typical lead time for custom flanges?
A: Standard lead time for non-standard marine flanges (DN50-DN600) is 3-4 weeks, including material sourcing and certification. Large diameters (up to 5,000 mm) may require 6-8 weeks.
Q5: Do you provide on-site machining for large rollers that cannot be transported?
A: Yes. Our portable CNC milling and turning units can be deployed to your facility. We have successfully machined rollers up to 11,000 mm in diameter directly on-site.
Q6: How do you ensure concentricity on very long rollers?
A: We employ hydraulic steady rests with automatic pressure adjustment along the roller length, combined in-process laser measurement feedback to maintain concentricity within 0.01 mm.
Q7: Which flange standard do you recommend for high-pressure seawater systems?
A: For high-pressure seawater, we recommend ASME B16.5 Class 1500 flanges in Duplex 2205 or Inconel 625, with a raised face finish (Ra 3.2 µm or better) and full penetration weld preparation.
Q8: What is the typical surface finish for a paper mill roller?
A: Paper mill rollers typically require Ra ≤ 0.8 µm to prevent paper marking. We can achieve mirror finishes upon request, followed by hard chrome or ceramic coating if specified.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
2018
Employee Number:
>63
Ecer Certification：
Active Member
Qingdao Sande Technology Co., Ltd. is located in Qingdao. We are specialized in manufacturing forging, CNC machining and various surface treatments. We have over 16 years of experience.We have a professional and experienced team of engineers, advanced production and testing equipment, a powerful qua... Qingdao Sande Technology Co., Ltd. is located in Qingdao. We are specialized in manufacturing forging, CNC machining and various surface treatments. We have over 16 years of experience.We have a professional and experienced team of engineers, advanced production and testing equipment, a powerful qua...
