Products

Suppliers

Filter Gallery
7,933

Sapphire Polishing

Products

Sorry! No matches were found.

Single - Sided Polishing of Sapphire and Other High Precision Large Workpiece

Single - Sided Polishing of Sapphire and Other High Precision Large Workpiece

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Lapping or Polishing of Sapphire Non-Metallic Products on Both Sides

Lapping or Polishing of Sapphire Non-Metallic Products on Both Sides

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Automatic Grade : Semiautomatic
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Double-Sided Grinding & Polishing/Optical Glass Double-Sided Polishing/CNC Polishing Service

Double-Sided Grinding & Polishing/Optical Glass Double-Sided Polishing/CNC Polishing Service

US $ 100 / kg FOB
1 kg (MOQ)
More
Main Products: Optical Lens, Optical Windows, Laser Windows, Fused Silica, Optical Prism, Optical Glass, Sapphire Window, Aspheric Lens, Spheric Lens, Optical Mirror
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
Ion Beam Polishing/Optical Glass Ion Beam Polishing/Optical Lens Ion Beam Polishing

Ion Beam Polishing/Optical Glass Ion Beam Polishing/Optical Lens Ion Beam Polishing

US $ 500 / kg FOB
1 kg (MOQ)
More
Certification : RoHS, ISO9001, CE
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
Magnetorheological Polishing/Aspherical Lens Polishing/Optical Lens Mrf Polishing/Optical Lenses Polishing

Magnetorheological Polishing/Aspherical Lens Polishing/Optical Lens Mrf Polishing/Optical Lenses Polishing

US $ 600 / kg FOB
1 kg (MOQ)
More
Main Products: Optical Lens, Optical Windows, Laser Windows, Fused Silica, Optical Prism, Optical Glass, Sapphire Window, Aspheric Lens, Spheric Lens, Optical Mirror
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
High-Precision Fused Silica CNC Polishing Solutions for Quartz

High-Precision Fused Silica CNC Polishing Solutions for Quartz

US $ 100 / kg FOB
1 kg (MOQ)
More
Certification : RoHS, ISO9001, CE
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
Optical Glass Magnetorheological Polishing/Optical Lens Magnetorheological Polishing/Mrf

Optical Glass Magnetorheological Polishing/Optical Lens Magnetorheological Polishing/Mrf

US $ 600 / kg FOB
1 kg (MOQ)
More
Main Products: Optical Lens, Optical Windows, Laser Windows, Fused Silica, Optical Prism, Optical Glass, Sapphire Window, Aspheric Lens, Spheric Lens, Optical Mirror
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
Aspherical Lens Polishing/Quartz Polishing Service/Glass Ion Beam Polishing/Optical Lenses Polishing

Aspherical Lens Polishing/Quartz Polishing Service/Glass Ion Beam Polishing/Optical Lenses Polishing

US $ 500 / kg FOB
1 kg (MOQ)
More
Certification : RoHS, ISO9001, CE
Contact Supplier
Audited Supplier
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Trading Company

Shanghai, China Since 2021
Chat Now Send Inquiry
Alumina Ceramic Wafer Polishing Plate Chemical Mechanical Polishing (CMP)

Alumina Ceramic Wafer Polishing Plate Chemical Mechanical Polishing (CMP)

US $ 2,000-5,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Wear Resistant Ceramic Liner, Ceramic Pipe Alumina Tube Elbow Tile, Alumina Ceramic Lining, Ceramic Rubber Composition Ceramic Rubber Steel, Zta Ceramic Wear Liner, Completed Equipments Ceramic Lining Steel Paint, Ceramic Grinding Media, Alumina Ball and Ceramic Ball, 99.7%Alumina Ceramic Wafer Polishing Plate, Chemical Tower Packings
Contact Supplier
Audited Supplier
Pingxiang Chemshun Ceramics Co., Ltd.

Manufacturer/Factory & Trading Company

Jiangxi, China Since 2006
Chat Now Send Inquiry
China Fangda Manufacturing Single-Side Grinding and Polishing Machine Ceramic Silicon Wafer and Other Products of High Precision Grinding and Polishing Equipmen

China Fangda Manufacturing Single-Side Grinding and Polishing Machine Ceramic Silicon Wafer and Other Products of High Precision Grinding and Polishing Equipmen

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Condition : New
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Single Side High Precision and High Accuracy Polishing Machine for Silicon Wafers

Single Side High Precision and High Accuracy Polishing Machine for Silicon Wafers

US $ 80,899-105,999 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping And Polishing Machine
Contact Supplier
Audited Supplier
Dongguan KIZI Precision Lapping Mechanical Manufacture Co., Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2018
Chat Now Send Inquiry
Fonda Produces 3D Glass Grinding Machine Polishing Machine Is Suitable for 3D Glass Surface Precision Grinding and Polishing Machine

Fonda Produces 3D Glass Grinding Machine Polishing Machine Is Suitable for 3D Glass Surface Precision Grinding and Polishing Machine

US $ 8,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Condition : New
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Related Searches
Grinding Machine Optical Lens Other Optical Lens & Instruments Optical Mirror Metal Polishing Machine Optical Filter
Tool Grinding Machine Industrial Grinding Machine Cutter Grinding Machine Heavy Duty Grinding Machine Studer Grinding Machine Table Grinding Machine
China High Precision Copper Polishing Machine

China High Precision Copper Polishing Machine

US $ 80,000-100,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping And Polishing Machine
Contact Supplier
Audited Supplier
Dongguan KIZI Precision Lapping Mechanical Manufacture Co., Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2018
Chat Now Send Inquiry
Surface Grinding Machine Grinding Stainless Steel Sapphire Ceramics

Surface Grinding Machine Grinding Stainless Steel Sapphire Ceramics

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Abrasives : Grinding Wheel
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Sapphire and Other Non-Metallic Materials of Double-Sided Grinding and Polishing Equipment

Sapphire and Other Non-Metallic Materials of Double-Sided Grinding and Polishing Equipment

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
China Fangda Manufacturing Sapphire Double-Sided Grinding and Polishing Equipment

China Fangda Manufacturing Sapphire Double-Sided Grinding and Polishing Equipment

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Abrasives : Grinding Wheel
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
LED Sapphire Substrate Double Side Grinding and Polishing Processing Equipment Manufacturers

LED Sapphire Substrate Double Side Grinding and Polishing Processing Equipment Manufacturers

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Sapphire Substrate with Trim Precision Plane Single-Side Grinding and Polishing Processing Equipment

Sapphire Substrate with Trim Precision Plane Single-Side Grinding and Polishing Processing Equipment

US $ 20,000-60,000 / Piece FOB
1 Piece (MOQ)
More
Automatic Grade : Semiautomatic
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Shenzhen Ponda Sapphire Grinding and Polishing Equipment Double Sided Grinding Machine

Shenzhen Ponda Sapphire Grinding and Polishing Equipment Double Sided Grinding Machine

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
High Precision and High Efficiency Single-Sided Surface Grinding Machine

High Precision and High Efficiency Single-Sided Surface Grinding Machine

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Automatic Grade : Semiautomatic
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Related Videos
  • What is Double-Sided Grinding & Polishing/Optical Glass Double-Sided Polishing/CNC Polishing Service
    What is Double-Sided Grinding & Polishing/Optical Glass Double-Sided Polishing/CNC Polishing Service
    US $ 100 /kg
    1 kg (MOQ)
    Contact Supplier
  • What is Ion Beam Polishing/Optical Glass Ion Beam Polishing/Optical Lens Ion Beam Polishing
    What is Ion Beam Polishing/Optical Glass Ion Beam Polishing/Optical Lens Ion Beam Polishing
    US $ 500 /kg
    1 kg (MOQ)
    Contact Supplier
  • What is Magnetorheological Polishing/Aspherical Lens Polishing/Optical Lens Mrf Polishing/Optical Lenses Polishing
    What is Magnetorheological Polishing/Aspherical Lens Polishing/Optical Lens Mrf Polishing/Optical Lenses Polishing
    US $ 600 /kg
    1 kg (MOQ)
    Contact Supplier
  • What is High-Precision Fused Silica CNC Polishing Solutions for Quartz
    What is High-Precision Fused Silica CNC Polishing Solutions for Quartz
    US $ 100 /kg
    1 kg (MOQ)
    Contact Supplier
Shenzhen Ponda New CNC Sapphire Epitaxy High-Precision Single-Side Lapping and Polishing Equipment

Shenzhen Ponda New CNC Sapphire Epitaxy High-Precision Single-Side Lapping and Polishing Equipment

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Sapphire Lapping Wafer Polishing Plate Turn Table

Sapphire Lapping Wafer Polishing Plate Turn Table

US $ 2,900 / Piece FOB
2 Pieces (MOQ)
Contact Supplier
Audited Supplier
Pingxiang Chemshun Ceramics Co., Ltd.

Manufacturer/Factory & Trading Company

Jiangxi, China Since 2006
Chat Now Send Inquiry
Pangda Supply Sapphire Silicon Wafer Ultra-Precision Grinding and Polishing Machine

Pangda Supply Sapphire Silicon Wafer Ultra-Precision Grinding and Polishing Machine

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry

Not exactly what you want?

Post Sourcing Request

About Sapphire Polishing FAQ
  • QWhat advantages does wholesale purchase of grinding machines offer?

    The Sapphire Polishing is classified under our comprehensive Grinding Machine range.Buying grinding machines wholesale provides cost savings, bulk purchase convenience, and consistent product quality. Wholesale orders often come with discounts and customization options, ensuring you receive top-notch machinery from trusted suppliers.

  • QHow can I evaluate the quality of grinding machine suppliers in China?

    Enhance your Grinding Machine setup with our premium Sapphire Polishing.When assessing the quality of grinding machine suppliers in China, consider factors such as experience, certifications, and customer reviews. Requesting product samples and conducting on-site visits can also help verify the supplier's capabilities. Choosing a reputable supplier ensures reliable and high-quality machinery.

  • QWhat are the key components of a grinding machine?

    The Sapphire Polishing is classified under our comprehensive Grinding Machine range.A grinding machine typically consists of a grinding wheel, a workpiece holding device, and a reciprocating or rotating table. Each component plays a crucial role in achieving accurate and efficient grinding results. Partnering with a trusted manufacturer ensures you receive high-quality components.

Efficient Single-Side Precision Grinding and Polishing for Surface Processing

Efficient Single-Side Precision Grinding and Polishing for Surface Processing

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Type : Surface Grinding Machine
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Hydraulic Tight Single Surface Grinding and Polishing

Hydraulic Tight Single Surface Grinding and Polishing

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Wafer Grinding, Polishing and Thinning New Technologies

Wafer Grinding, Polishing and Thinning New Technologies

US $ 20,000-60,000 / Piece FOB
1 Piece (MOQ)
More
Precision : High Precision
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
China Supply Wafer Processing Machine and Comsumables Single Side Polishing

China Supply Wafer Processing Machine and Comsumables Single Side Polishing

US $ 15,100-16,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping And Polishing Machine
Contact Supplier
Audited Supplier
Dongguan KIZI Precision Lapping Mechanical Manufacture Co., Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2018
Chat Now Send Inquiry
Single Side Stainless Steel Parts Surface Grinding and Polishing Machine Factory Price

Single Side Stainless Steel Parts Surface Grinding and Polishing Machine Factory Price

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Precision : High Precision
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Fonda High Quality Vertical Double-Sided Grinding and Polishing Model Number Fd-6bl

Fonda High Quality Vertical Double-Sided Grinding and Polishing Model Number Fd-6bl

US $ 30,000-50,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Metal End Grinding and Polishing Equipment, Can Achieve High Flatness Parallelism

Metal End Grinding and Polishing Equipment, Can Achieve High Flatness Parallelism

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Abrasives : Grinding Wheel
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Precise Mirror Polishing Phosphor Bronze

Precise Mirror Polishing Phosphor Bronze

US $ 10,000-60,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping And Polishing Machine
Contact Supplier
Audited Supplier
Dongguan KIZI Precision Lapping Mechanical Manufacture Co., Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2018
Chat Now Send Inquiry
Suitable for High Precision Large Workpiece Single-Plane Grinding and Polishing

Suitable for High Precision Large Workpiece Single-Plane Grinding and Polishing

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Type : Surface Grinding Machine
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Valve Plate and Other High-Precision Large Workpiece Single-Side Polishing Machine

Valve Plate and Other High-Precision Large Workpiece Single-Side Polishing Machine

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Fd-460 3X Stainless Steel Single Side Grinding or Polishing

Fd-460 3X Stainless Steel Single Side Grinding or Polishing

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Precision : High Precision
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
D-8103xqf High Precision Single-Side Grinding and Polishing of Large Workpieces

D-8103xqf High Precision Single-Side Grinding and Polishing of Large Workpieces

US $ 8,000-20,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Lapping Machine, Polishing Machine, Grinding Machine,Wafer Grinder,Single Plate Lapping & Polishing Machine,Double Plate Lapping & Polishing Machine,Lapping & CMP Systm,Abrasive Tools & Consumables.
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
Transverse Wafer Grinder Thinning Polishing

Transverse Wafer Grinder Thinning Polishing

US $ 20,000-60,000 / Piece FOB
1 Piece (MOQ)
More
Abrasives : Grinding Wheel
Contact Supplier
Audited Supplier
Shenzhen Ponda Grinding Technology Co.,Ltd.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2021
Chat Now Send Inquiry
View More

Browse by Categories

Home > Manufacturing & Processing Machinery > Machine Tools > Grinding Machine > Tool Grinding Machine
1/221
TOP

Search Filter

Categories

More Less
  • Grinding Machine
  • Optical Lens
  • Other Optical Lens & Instruments
  • Optical Mirror
  • Metal Polishing Machine
  • Optical Filter
  • Prism
  • Stone Polishing & Grinding Machine
  • Laser Equipment Parts
  • Mould Parts

Abrasives

More Less
  • Grinding Wheel

Automatic Grade

More Less
  • Semiautomatic
  • Automatic

Condition

More Less
  • New

Cylindrical Grinder Type

More Less
  • Universal Cylindrical Grinder
  • Plunge Cylindrical Grinder

Processing Object

More Less
  • Curve

Company Type

More Less
  • Trading Company
  • Manufacturer/Factory
  • Group Corporation
  • Other

Company Location

More Less
  • Guangdong
  • Henan
  • Shandong
  • Guangxi
  • Jiangsu
  • Fujian
  • Jilin
  • Beijing
  • Hebei
  • Tianjin
  • Hunan
  • Shanghai
  • Zhejiang
  • Jiangxi
  • Inner Mongolia
  • Sichuan
  • Shaanxi
  • Chongqing
  • Liaoning
  • Hubei
  • Anhui
  • Ningxia
Reset Done