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High-Precision CNC Thread Grinding Machine for Screw and Worm Sk7640
US$50,000.00
1-4 Pieces
US$45,000.00
5-9 Pieces
US$40,000.00
10-19 Pieces
US$30,000.00
20+ Pieces
Product profile
Customization
AvailableAfter-sales Service
Overseas ServiceWarranty
12 Months Since ShipmentModel NO.
SK7640Type
Internal Grinding MachineProcessing Object
ThreadAbrasives
Grinding WheelControlling Mode
CNCAutomatic Grade
AutomaticCylindrical Grinder Type
MetalPrecision
High PrecisionCondition
NewApplication
Cylindrical Worms with Za, Zn, Zi, Zk, Zc1 ToothModel
Sk7640Service
Engineers Can Installation and TrainingMax.Mounting Diameter
600 mmMax.Center Distance
320mmGrinding Diameter
150-400mmMax.Grinding Length
200mmModule Range
0.5-24mmHelix Angle
±12°Thread Start Number
1-45Max.Wheel Linear Speed
42000 R/MinMax.Wheel Diameter
125mmMachine Size
3300×2340×2500mmCNC System
Siemens 828dTransport Package
It's Suitable for Long Distance TransportationSpecification
2300×1600×2000MMTrademark
RefineOrigin
ChinaProduction Capacity
100 Sets/YearKey features
High-Precision CNC Control: Siemens 828d system controls 4 axes for precise thread grinding with automatic compensation.
Versatile Thread Profiles: Grinds cylindrical, conical, triangular, buttress, trapezoid, and circular tooth forms.
High Rigidity Construction: Bed, table, and wheel stock made from quality iron cast with multi-aging and manual scraping.
Advanced Servo Drive: Z and X axes driven by servo motors and precision ball screws for accurate movement.
High-Speed Spindle: Motorized wheel spindle with frequency converter regulation and water cooler temperature control.
Automatic Dressing: Diamond roller dressing with automatic compensation for consistent grinding quality.
Wide Application Range: Suitable for aerospace, automotive, tool making, and oil & gas sector components.
Customizable Configurations: Custom configurations available upon request to meet specific industry needs.
Company profile

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2013-09-30Nearest Port: Dalian Port, Qingdao Port, Tianjin PortAverage Response Time: ≤3.38hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DAP, CIP, CPT, FCA
AI-Powered supplier vetting
SummaryDalian Refine Tech Co., Ltd. is a China-based limited company identified as both a trading company and manufacturer/factory. It manufactures and supplies metal-processing machinery, including vertical lathes, CNC and manual lathes, boring machines, machining centers, gear hobbing machines, and radial drilling machines. The supplier reports ISO 9001 and ISO 14001 certification, 5 production lines, 11–20 quality-control staff, and 6–10 years of R&D-engineer experience. It states that 90% of sales are exports, exports to more than 60 countries, and has operated exports since 2013. The supplier describes one-stop service and production-problem support, but the provided information does not substantiate detailed after-sales procedures or customization examples. Customer evidence includes one recorded trade transaction and one named buyer, while broader customer references are not provided.
Supplier typeThe supplier is explicitly classified as both a trading company and manufacturer/factory, and describes itself as integrating R&D, production, and sales of machine tools for metal machining. Its listed business areas include industrial equipment, manufacturing machinery, and related tools.
CertificationsThe supplier reports holding ISO 14001 and ISO 9001 management-system certifications. These are explicit certification claims in the provided supplier information.
R&D capabilityThe supplier reports integrating R&D with production and sales, describes ongoing technological and management innovation, and lists 6–10 years of R&D-engineer experience. Its expanded product range includes CNC equipment, machining centers, boring machines, gear hobbing machines, and radial drilling machines, supporting an established technical-development capability.
Production capacityThe supplier identifies itself as a machine-tool manufacturer/factory, reports 5 production lines, and describes 15 years of specialization in vertical-lathe manufacturing. Its product scope covers multiple metal-processing machine categories, indicating established production breadth.
Client casesThe supplier states that its products have been exported to more than 60 countries, and one trade record identifies WELLTRON AUTOMATION as a buyer for a CNC machine. The provided evidence supports international customer reach, but only one named buyer and one recorded transaction are documented.
Product Q&A
Q:What is the warranty period for this machine?
A:
Standard warranty is 12 months or 2,000 operating hours, whichever comes first. Extended warranty up to 36 months is optional.
Q:What CNC system does the Sk7640 use?
A:
It uses the Siemens 828d CNC system, controlling 4 axes including work spindle rotation, table movement, wheel stock feeding, and tilting.
Q:What types of threads can this machine grind?
A:
It can grind internal threads with cylindrical, conical, triangular, buttress, trapezoid, and circular tooth forms.
Q:What are the main applications of this thread grinding machine?
A:
It is used for precision thread ring gauges, ball screw nuts, and components in aerospace, automotive, tool making, and oil & gas industries.
Q:Is customization available for this machine?
A:
Yes, custom configurations are available upon request. Specific applications and models can be tailored to customer needs.
Send Inquiry
*To:
Dalian Refine Tech Co., Ltd.
Dalian Refine Tech Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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