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CNC MACHINING PART
WANDA-AN
CNC-010-002
CNC MACHINING PART
![]() | What’s the CNC Machining? Computer Numerical Control (CNC) is an automated manufacturing process that controls and operates machinery—such as lathes, mills, drills, and more. It has evolved the manufacturing industry as we know it, streamlining the production process and allowing complex tasks to be done with precision and efficiency. When a CNC system is activated, the desired cuts are programmed into the software and dictated to corresponding tools and machinery,which carry out the dimensional tasks as specified,much like a robot. In CNC programming,the code generator within the numerical system will often assume mechanisms are flawless,despite the possibility of errors,which is greater whenever a CNC machine is directed to cut in more than one direction simultaneously.The placement of a tool in a numerical control system is outlined by a series of inputs known as the part program. With a numerical control machine,programs are inputted via punch cards.By contrast, the programs for CNC machines are fed to computers through small keyboards.CNC programming is retained in a computer’s memory.The code itself is written and edited by programmers. Therefore, CNC systems offer far more expansive computational capacity.Best of all,CNC systems are by no means static since newer prompts can be added to pre-existing programs through revised code. |
![]() | The CNC Machine Types: CNC Lathes: Used for turning operations CNC Mills: Used for cutting and drilling operations CNC Plasma Cutters: Used for cutting metal using a plasma torch CNC Routers: Used for cutting various materials like wood, plastic, and metal 3D Printers: Additive manufacturing machines that build objects layer by layer While CNC machines are largely automated, machinists are still needed to ensure proper operations and performance. So, once a machine is programmed and coded, a CNC machine operator is needed to step in. This machinist will conduct a test run to ensure everything is working properly before the manufacturing can fully begin. Otherwise, there is a risk of damage to the machine and/or product |
Main features of the CNC Machining: Precision and Accuracy: CNC machines can produce parts with high precision and tight tolerances, often within ±0.001 inches, making them ideal for applications that require exact specifications. Automation: CNC machining is highly automated, allowing for consistent production runs without the need for constant operator intervention. This automation reduces human error and improves efficiency. Complex Shapes: CNC machining can create intricate and complex shapes that would be difficult or impossible to achieve with manual machining techniques. Versatility: CNC machines can work with a wide variety of materials, including metals, plastics, wood, and composites, making them suitable for diverse applications across different industries. Repeatability: Once a CNC program is created, the machine can produce the same part repeatedly with consistent quality, which is essential for mass production. Speed: CNC machines can operate at high speeds, significantly reducing production time compared to manual machining. Multi-Functionality: Many CNC machines combine multiple operations (such as milling, turning, and drilling) into one setup, streamlining the manufacturing process. Reduced Waste: CNC machining is typically more efficient in material usage, as the computer-controlled process optimizes cutting paths and minimizes scrap material. Programming Flexibility: CNC machines can be easily reprogrammed for different jobs, allowing manufacturers to quickly adapt to changes in design or production needs. Integration with CAD/CAM: CNC machining can be integrated with Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) software, enabling designers to create complex geometries that can be directly translated into machine instructions. Enhanced Safety: CNC machines are designed with safety features that help protect operators from hazards, such as automatic shut-off systems and enclosures. |
![]() | THE CNC USAGES CNC (Computer Numerical Control) technology is widely used across various industries due to its precision, efficiency, and versatility. 1. Manufacturing Precision Parts Production: CNC machines are used to produce high-precision components for industries such as automotive, aerospace, and electronics. 2. Metal Fabrication Cutting and Shaping: CNC milling, turning, and laser cutting are commonly employed to shape metals into specific parts and assemblies. 3. Woodworking Furniture and Fixtures: CNC routers are used for creating intricate designs, custom furniture, cabinetry, and decorative elements. 4. Sign Making Custom Signs: CNC laser cutters and routers are used to create detailed signs from various materials, including wood, acrylic, and metal. 5. Prototyping Rapid Prototyping: CNC machines enable quick and accurate production of prototypes for product development and testing. 6. Tooling and Molds Die and Mold Making: CNC machines are essential for creating precision molds and dies for injection molding and casting processes. 7. Aerospace Components Complex Parts: CNC technology is crucial in manufacturing intricate parts for aircraft and spacecraft, where precision is critical. 8. Medical Devices Surgical Instruments: CNC machining is used to produce high-precision medical instruments and devices, ensuring reliability and safety. 9. Jewelry Making Detailed Designs: CNC machines enable the creation of intricate patterns and designs in jewelry, enhancing customization and production efficiency. 10. Automotive Parts Component Manufacturing: CNC machines are used to produce engine parts, transmission components, and other critical automotive components. 11. Electronics Circuit Board Production: CNC drilling and milling are used to create printed circuit boards (PCBs) and enclosures for electronic devices. |
PRODUCTS PARAMETER
Product Parameter
1. Precision stamping part,CNC machining part,turned part
2. Tolerance: ± 0. 01 - ± 0.1mm
3. Certificate: ISO 9001
4. Total customer satisfaction
Material can be carbon steel, stainless steel, alloy, aluminum, brass, copper, bronze, steel Alloy, other type of materials.
Surface treatment: Polishing, zinc plating, hard anodizing, nickel plating, chrome plating, powder coating, phosphate coating, etc.
Our production can be made exactly according to customers' drawing. Very tight tolerance can be controlled to meet clients' requirement.
All of the parts are manufactured under ISO 9001 certification and with strict quality control. 8 engineers and 8 quality inspectors with advanced equipment making sure our productions delivered with high quality and making us a professional company in this industry.
Short delivery time meets your requirements
"Professional, sincere, sensitive, and responsible ".
Factory: | Shenzhen Wanda-an Precision Technology Co., Ltd |
Production Description | CNC Lathe Machining Steel Services cnc Machining Turning Milling Steel Parts custom Cnc Machining Prototyping Service |
Processing | Machining, Turning, Milling, Grinding, Stamping service etc. |
Material for CNC Machining processing | 1) Aluminum - AL 6061-T6, 6063, 7075-T,5083,6063,6082,5052,2A12 etc. |
2) Stainless steel - SS 201,SS301 SS303,SS304,SS316L, SS416L,17-4(SUS630),440C, 430 etc. | |
3) Steel - 4140,4340,Q235, Q345B,20#,Cr12MoV,D2,A2,4140,4150,P20,S136,M2,O2, SKD11,CRS, etc. | |
4) Titanium - TA1,TA2/GR2, TA4/GR5, TC4, TC18 etc. | |
5) Brass - C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90) etc. | |
6) Copper - bronze,Phosphor Bronze, Magnesium alloy, etc. | |
Finish | For Aluminum parts - Clear anodized, Color anodized, Hard anodized, Sandblasting, Chemical film, Brushing, Polishing, Painting, Silk screen printing,Etching, Laser marking, etc. |
For Stainless steel parts - Polishing, Passivation,PVD, Sandblasting, Black oxide, Electrophoresis black, Painting, Silk screen printing,Etching, Laser marking, etc. | |
For The Steel parts - Polishing, Black oxide, Nickel /Zinc/Gold/ Chrome/Silver plating, Carburized, Powder coating,electrophoresis, QPQ(Quench-Polish-Quench), Heat treatment, | |
Painting, Silk screen printing,Etching, Laser marking, etc. etc. | |
For Brass parts - Nickel /Zinc/Gold/ Chrome/Silver/Titanium plating, Electrophoresis black, Powder coating,Painting, Silk screen printing,Etching, Laser marking, etc. | |
Shenzhen Mandaan Precision handles many other type of finish, please kindly contact us if your required finish is not listed above. | |
Tolerance | Minimum tolerance +/- 0.05mm (+/- 0.0005") |
Surface roughness | Ra 0.1~3.2 |
Drawing format | Pro-e/UG/PDF/DWG/DXF/Solidworks, etc. |
Testing equipment | CMM (Coordinate Measuring Machine),Height gauge, Caliper, Hardness tester, Roughness tester, Projector machine, Pin/Angle/Block/Plug/Thickness/Thread/Radius gauge,etc. |
MOQ | 1 piece |
Lead time | 2 weeks after received order. |
Certificate | ISO9001, ISO13485. |
Inspection processing | IQC,IPQC, FQC, QA. |
Capacity | CNC turning work range: φ0.5mm-φ650mm*600mm. |
CNC milling work range: 880mm*1300mm*600mm. | |
Application | Automation, Medical device, Consumer Electronics, Security, IoT, Energy, etc. |
MACHINING PROCESS
CAD Design: We have our own professional design team capable of providing clients with satisfactory 3D models and detailed engineering drawings. Of course,
clients can also provide their own drawings to us for manufacturing.
CAM Programming: With our own manufacturing workshop, we generate cutting paths and process data that CNC machines can understand and execute,
facilitating prototype design and production according to customer requirements.
Material Preparation: Our factory supports various materials including aluminum profiles and alloys, copper and brass alloys, iron, stainless steel, and special materials (e.g., tool steels).
CNC Programming: Our engineering design team and skilled equipment operators utilize professional CAM software to generate precise programs for CNC machines,
controlling machining parameters such as cutting speed, feed rate, and depth.
Automated Processing: Our CNC machines operate automatically based on pre-set programs, performing cutting, drilling, milling, and other processes efficiently and accurately.
Quality Control: We have a dedicated quality management department that conducts real-time monitoring and inspection of our production processes,
including dimensional measurements, surface quality checks,and inspections of raw materials and finished products, ensuring compliance with specifications.
Surface Treatment: Depending on requirements, finished products undergo surface treatments such as polishing, grinding, electroplating,
and sandblasting to enhance their appearance and performance characteristics.
Assembly and Testing: Upon completion of manufacturing, our products undergo rigorous assembly and functional testing to ensure their integrity and performance.
COMPANY PROFILES
OUR SERVICES
OUR PARTNERS
CERTIFICATION
FAQ
1.Q: Who Are We?
A: We are factory with ISO 9001,IATF 16949 quality certification system in place, We produce all our products in-house with SGS Rosh Reach certificated materials,so you can get better quality control and competitve price offering than others on the market.
We provide high-quality metal processing for international and domestic big brand manufacturers such as electrical appliances,electrical appliances and new energy vehicles etc
2.Q: What kind of service can you provide?
A: Our company (WANDA-AN Precision) can provide OEM sheet metal stamping and fabrication, CNC milling and turning,stamping die design and manufacturing service.
3.Q: What's kinds of information you need for a quote?
A: In order to quote for you earlier, please provide us the following information together with your inquiry.
a. Detailed drawings (STEP, CAD, SOLID Works, PROE, DXF and PDF)
b. Material requirement (SUS, SPCC, SECC, SGCC, Copper, AL, etc.)
c. Surface treatment (powder coating, sand blasting, planting, polishing, oxidization, brushing, etc.)
d. Quantity (per order/ per month/ annual)
e. Any special demands or requirements, such as packing, labels, delivery, etc.
4.Q: What if I don't have the required drawings or docuemnt information above?
A: Please send your sample to our factory, then we can copy or provide you better solutions. Please send us pictures or drafts with dimensions (Thickness, Length, Height, Width), CAD or 3D file will be made for you if placed order.
5.Q: What makes you different from others?
A:
a. We are an ISO 9001 and IATF 16949 certified manufacturer,Under these quality control system guideline as well as Our experienced technical personnel and skilled production operators,we can provide better quality products than others.
b.Fishish product quality inspection or Preshiment Inspection (PSI) reports available upon request.
c.Our quick manufacturing time and on-time delivery For Normal orders, we will promise to produce within 3 to 4 weeks.
d.24*7 customer service available,We will submit the quotation in 24 hours if getting detailed information during working days.As a factory and manufactuer, we have all the technicians to provide fastest response to all your technical inquiry.
6.Q: Is it possible to know how are my products going on without visiting your company?
A: We will offer a detailed production schedule and send weekly reports with photos or videos which show the machining progress.We can provide production sample for testing approval before or during the mass products
7.Q: Can I have a trial order or samples only for several pieces?
A: As the product is customized and need to be produced, we will charge sample cost, ,we will refund the sample cost after you placed mass orders.
8.Q: Why there is tooling cost?
A: It's mold cost. Indispensable production process. Only need to pay for first order, and we will bear maintenance cost of mold damage.
9.Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance.
Payment>=1000USD, 40% T/T in advance, balance before shipment.
10.Q: What's your after-sale service?
A: If there is quality problem, please provide photos or test report, we will replace defective goods or return funds immediately
CNC MACHINING PART
![]() | What’s the CNC Machining? Computer Numerical Control (CNC) is an automated manufacturing process that controls and operates machinery—such as lathes, mills, drills, and more. It has evolved the manufacturing industry as we know it, streamlining the production process and allowing complex tasks to be done with precision and efficiency. When a CNC system is activated, the desired cuts are programmed into the software and dictated to corresponding tools and machinery,which carry out the dimensional tasks as specified,much like a robot. In CNC programming,the code generator within the numerical system will often assume mechanisms are flawless,despite the possibility of errors,which is greater whenever a CNC machine is directed to cut in more than one direction simultaneously.The placement of a tool in a numerical control system is outlined by a series of inputs known as the part program. With a numerical control machine,programs are inputted via punch cards.By contrast, the programs for CNC machines are fed to computers through small keyboards.CNC programming is retained in a computer’s memory.The code itself is written and edited by programmers. Therefore, CNC systems offer far more expansive computational capacity.Best of all,CNC systems are by no means static since newer prompts can be added to pre-existing programs through revised code. |
![]() | The CNC Machine Types: CNC Lathes: Used for turning operations CNC Mills: Used for cutting and drilling operations CNC Plasma Cutters: Used for cutting metal using a plasma torch CNC Routers: Used for cutting various materials like wood, plastic, and metal 3D Printers: Additive manufacturing machines that build objects layer by layer While CNC machines are largely automated, machinists are still needed to ensure proper operations and performance. So, once a machine is programmed and coded, a CNC machine operator is needed to step in. This machinist will conduct a test run to ensure everything is working properly before the manufacturing can fully begin. Otherwise, there is a risk of damage to the machine and/or product |
Main features of the CNC Machining: Precision and Accuracy: CNC machines can produce parts with high precision and tight tolerances, often within ±0.001 inches, making them ideal for applications that require exact specifications. Automation: CNC machining is highly automated, allowing for consistent production runs without the need for constant operator intervention. This automation reduces human error and improves efficiency. Complex Shapes: CNC machining can create intricate and complex shapes that would be difficult or impossible to achieve with manual machining techniques. Versatility: CNC machines can work with a wide variety of materials, including metals, plastics, wood, and composites, making them suitable for diverse applications across different industries. Repeatability: Once a CNC program is created, the machine can produce the same part repeatedly with consistent quality, which is essential for mass production. Speed: CNC machines can operate at high speeds, significantly reducing production time compared to manual machining. Multi-Functionality: Many CNC machines combine multiple operations (such as milling, turning, and drilling) into one setup, streamlining the manufacturing process. Reduced Waste: CNC machining is typically more efficient in material usage, as the computer-controlled process optimizes cutting paths and minimizes scrap material. Programming Flexibility: CNC machines can be easily reprogrammed for different jobs, allowing manufacturers to quickly adapt to changes in design or production needs. Integration with CAD/CAM: CNC machining can be integrated with Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) software, enabling designers to create complex geometries that can be directly translated into machine instructions. Enhanced Safety: CNC machines are designed with safety features that help protect operators from hazards, such as automatic shut-off systems and enclosures. |
![]() | THE CNC USAGES CNC (Computer Numerical Control) technology is widely used across various industries due to its precision, efficiency, and versatility. 1. Manufacturing Precision Parts Production: CNC machines are used to produce high-precision components for industries such as automotive, aerospace, and electronics. 2. Metal Fabrication Cutting and Shaping: CNC milling, turning, and laser cutting are commonly employed to shape metals into specific parts and assemblies. 3. Woodworking Furniture and Fixtures: CNC routers are used for creating intricate designs, custom furniture, cabinetry, and decorative elements. 4. Sign Making Custom Signs: CNC laser cutters and routers are used to create detailed signs from various materials, including wood, acrylic, and metal. 5. Prototyping Rapid Prototyping: CNC machines enable quick and accurate production of prototypes for product development and testing. 6. Tooling and Molds Die and Mold Making: CNC machines are essential for creating precision molds and dies for injection molding and casting processes. 7. Aerospace Components Complex Parts: CNC technology is crucial in manufacturing intricate parts for aircraft and spacecraft, where precision is critical. 8. Medical Devices Surgical Instruments: CNC machining is used to produce high-precision medical instruments and devices, ensuring reliability and safety. 9. Jewelry Making Detailed Designs: CNC machines enable the creation of intricate patterns and designs in jewelry, enhancing customization and production efficiency. 10. Automotive Parts Component Manufacturing: CNC machines are used to produce engine parts, transmission components, and other critical automotive components. 11. Electronics Circuit Board Production: CNC drilling and milling are used to create printed circuit boards (PCBs) and enclosures for electronic devices. |
PRODUCTS PARAMETER
Product Parameter
1. Precision stamping part,CNC machining part,turned part
2. Tolerance: ± 0. 01 - ± 0.1mm
3. Certificate: ISO 9001
4. Total customer satisfaction
Material can be carbon steel, stainless steel, alloy, aluminum, brass, copper, bronze, steel Alloy, other type of materials.
Surface treatment: Polishing, zinc plating, hard anodizing, nickel plating, chrome plating, powder coating, phosphate coating, etc.
Our production can be made exactly according to customers' drawing. Very tight tolerance can be controlled to meet clients' requirement.
All of the parts are manufactured under ISO 9001 certification and with strict quality control. 8 engineers and 8 quality inspectors with advanced equipment making sure our productions delivered with high quality and making us a professional company in this industry.
Short delivery time meets your requirements
"Professional, sincere, sensitive, and responsible ".
Factory: | Shenzhen Wanda-an Precision Technology Co., Ltd |
Production Description | CNC Lathe Machining Steel Services cnc Machining Turning Milling Steel Parts custom Cnc Machining Prototyping Service |
Processing | Machining, Turning, Milling, Grinding, Stamping service etc. |
Material for CNC Machining processing | 1) Aluminum - AL 6061-T6, 6063, 7075-T,5083,6063,6082,5052,2A12 etc. |
2) Stainless steel - SS 201,SS301 SS303,SS304,SS316L, SS416L,17-4(SUS630),440C, 430 etc. | |
3) Steel - 4140,4340,Q235, Q345B,20#,Cr12MoV,D2,A2,4140,4150,P20,S136,M2,O2, SKD11,CRS, etc. | |
4) Titanium - TA1,TA2/GR2, TA4/GR5, TC4, TC18 etc. | |
5) Brass - C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90) etc. | |
6) Copper - bronze,Phosphor Bronze, Magnesium alloy, etc. | |
Finish | For Aluminum parts - Clear anodized, Color anodized, Hard anodized, Sandblasting, Chemical film, Brushing, Polishing, Painting, Silk screen printing,Etching, Laser marking, etc. |
For Stainless steel parts - Polishing, Passivation,PVD, Sandblasting, Black oxide, Electrophoresis black, Painting, Silk screen printing,Etching, Laser marking, etc. | |
For The Steel parts - Polishing, Black oxide, Nickel /Zinc/Gold/ Chrome/Silver plating, Carburized, Powder coating,electrophoresis, QPQ(Quench-Polish-Quench), Heat treatment, | |
Painting, Silk screen printing,Etching, Laser marking, etc. etc. | |
For Brass parts - Nickel /Zinc/Gold/ Chrome/Silver/Titanium plating, Electrophoresis black, Powder coating,Painting, Silk screen printing,Etching, Laser marking, etc. | |
Shenzhen Mandaan Precision handles many other type of finish, please kindly contact us if your required finish is not listed above. | |
Tolerance | Minimum tolerance +/- 0.05mm (+/- 0.0005") |
Surface roughness | Ra 0.1~3.2 |
Drawing format | Pro-e/UG/PDF/DWG/DXF/Solidworks, etc. |
Testing equipment | CMM (Coordinate Measuring Machine),Height gauge, Caliper, Hardness tester, Roughness tester, Projector machine, Pin/Angle/Block/Plug/Thickness/Thread/Radius gauge,etc. |
MOQ | 1 piece |
Lead time | 2 weeks after received order. |
Certificate | ISO9001, ISO13485. |
Inspection processing | IQC,IPQC, FQC, QA. |
Capacity | CNC turning work range: φ0.5mm-φ650mm*600mm. |
CNC milling work range: 880mm*1300mm*600mm. | |
Application | Automation, Medical device, Consumer Electronics, Security, IoT, Energy, etc. |
MACHINING PROCESS
CAD Design: We have our own professional design team capable of providing clients with satisfactory 3D models and detailed engineering drawings. Of course,
clients can also provide their own drawings to us for manufacturing.
CAM Programming: With our own manufacturing workshop, we generate cutting paths and process data that CNC machines can understand and execute,
facilitating prototype design and production according to customer requirements.
Material Preparation: Our factory supports various materials including aluminum profiles and alloys, copper and brass alloys, iron, stainless steel, and special materials (e.g., tool steels).
CNC Programming: Our engineering design team and skilled equipment operators utilize professional CAM software to generate precise programs for CNC machines,
controlling machining parameters such as cutting speed, feed rate, and depth.
Automated Processing: Our CNC machines operate automatically based on pre-set programs, performing cutting, drilling, milling, and other processes efficiently and accurately.
Quality Control: We have a dedicated quality management department that conducts real-time monitoring and inspection of our production processes,
including dimensional measurements, surface quality checks,and inspections of raw materials and finished products, ensuring compliance with specifications.
Surface Treatment: Depending on requirements, finished products undergo surface treatments such as polishing, grinding, electroplating,
and sandblasting to enhance their appearance and performance characteristics.
Assembly and Testing: Upon completion of manufacturing, our products undergo rigorous assembly and functional testing to ensure their integrity and performance.
COMPANY PROFILES
OUR SERVICES
OUR PARTNERS
CERTIFICATION
FAQ
1.Q: Who Are We?
A: We are factory with ISO 9001,IATF 16949 quality certification system in place, We produce all our products in-house with SGS Rosh Reach certificated materials,so you can get better quality control and competitve price offering than others on the market.
We provide high-quality metal processing for international and domestic big brand manufacturers such as electrical appliances,electrical appliances and new energy vehicles etc
2.Q: What kind of service can you provide?
A: Our company (WANDA-AN Precision) can provide OEM sheet metal stamping and fabrication, CNC milling and turning,stamping die design and manufacturing service.
3.Q: What's kinds of information you need for a quote?
A: In order to quote for you earlier, please provide us the following information together with your inquiry.
a. Detailed drawings (STEP, CAD, SOLID Works, PROE, DXF and PDF)
b. Material requirement (SUS, SPCC, SECC, SGCC, Copper, AL, etc.)
c. Surface treatment (powder coating, sand blasting, planting, polishing, oxidization, brushing, etc.)
d. Quantity (per order/ per month/ annual)
e. Any special demands or requirements, such as packing, labels, delivery, etc.
4.Q: What if I don't have the required drawings or docuemnt information above?
A: Please send your sample to our factory, then we can copy or provide you better solutions. Please send us pictures or drafts with dimensions (Thickness, Length, Height, Width), CAD or 3D file will be made for you if placed order.
5.Q: What makes you different from others?
A:
a. We are an ISO 9001 and IATF 16949 certified manufacturer,Under these quality control system guideline as well as Our experienced technical personnel and skilled production operators,we can provide better quality products than others.
b.Fishish product quality inspection or Preshiment Inspection (PSI) reports available upon request.
c.Our quick manufacturing time and on-time delivery For Normal orders, we will promise to produce within 3 to 4 weeks.
d.24*7 customer service available,We will submit the quotation in 24 hours if getting detailed information during working days.As a factory and manufactuer, we have all the technicians to provide fastest response to all your technical inquiry.
6.Q: Is it possible to know how are my products going on without visiting your company?
A: We will offer a detailed production schedule and send weekly reports with photos or videos which show the machining progress.We can provide production sample for testing approval before or during the mass products
7.Q: Can I have a trial order or samples only for several pieces?
A: As the product is customized and need to be produced, we will charge sample cost, ,we will refund the sample cost after you placed mass orders.
8.Q: Why there is tooling cost?
A: It's mold cost. Indispensable production process. Only need to pay for first order, and we will bear maintenance cost of mold damage.
9.Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance.
Payment>=1000USD, 40% T/T in advance, balance before shipment.
10.Q: What's your after-sale service?
A: If there is quality problem, please provide photos or test report, we will replace defective goods or return funds immediately