8613681885644
shshangcai@163.com
enEnglish
Category
Your Professional Grinder And Polisher Supplier

 

Shanghai Shangcai Testermachine Co., Ltd. (SCTMC) is a manufacturer specializing in the full process production of metallographic sampling equipment and hardness testers, integrating independent research and development, processing and assembly, sales, and service. Our company specializes in producing cutting machines, mounting press, grinding and polishing machines, and Brinell, Rockwell, Vickers hardness testers, along with the supply of metallographic consumables and spare parts. Our products are widely used in metallurgy, automotive, aerospace, research, and testing industries worldwide.


Experienced R&D Team
Our engineers have over 10 years of experience and hold multiple core technology patents, supporting customized and automated solutions.

 

Complete Equipment
We have a complete machining workshop equipped with over 50 numerical control machine tools and other processing equipment, as well as cutting-edge equipment such as Mazak machine tools and Zeiss coordinate system which have been put into production and inspection.

 

Customization Available
An experienced R&D team supports sample testing, application solutions, customized fixtures, and non-standard equipment based on real testing needs.

 

Reliable Service
We provide 24-hour response, online guidance, one-year warranty, and up to 10 years of self-produced spare parts for stable long-term operation.

 

 
 

Technical Parameters

 

Disc Diameter

230mm

Abrasive Paper Diameter

230mm

Speed

Stepless speed 50~1400r/min,

and Four speed 300, 600, 900, 1400r/min

Rotational Direction

Clockwise and Counterclockwise

Electromotor

DC brushless motor, 220V, 600W

Control and Display

Touch panel, With washing function

Power Supply

220V, 50Hz, 6A

Dimensions

420×660×330mm

Net Weight

30kg

 

Stepless Speed Grinding and Polishing Machine

 

Types of Grinder And Polisher

The grinder and polisher produced by our company mainly include the following types:
 

Manual Grinding and Polishing Machine
Manual Grinding and Polishing Machine is a versatile tool that uses abrasive materials and controlled force (often operator-guided) to smooth, shape, and refine material surfaces, removing defects, rust, or oxides, and preparing them for detailed microstructural analysis or a high-polish finish, common in labs for specimens and industries for parts.

 

Automatic Grinder Polisher
Automatic Grinder Polisher is a machine that uses automated mechanical force and abrasives (like grinding papers and polishing suspensions) to precisely smooth and prepare material samples (metals, non-metals) for microscopic analysis, ensuring consistent, high-quality surfaces by controlling pressure, speed, and media delivery, often with touchscreen controls and program storage for repeatability in labs and manufacturing.

 

Advantages of Grinder And Polisher

 

Protect the workpiece

The workpiece is in the liquid to reduce mutual collision. The steel needle flows at a high speed and shuttles between the workpieces, which can achieve the purpose of polishing the surface of the workpiece without damaging the workpiece.

01

All-round polishing

Due to the use of small magnetized stainless steel needles as abrasive materials, it can polish the dead corners, cracks and small holes of irregular parts.

02

Easy to operate

Just put the container with parts, abrasives and polishing liquid on the workbench, set various parameters, press the start button, and the task can be completed automatically without no one.

03

Cost reduction

Abrasive materials are semi-permanent consumables. Unless they are lost, they do not need to be added frequently. Only the grinding water needs to be replaced every day. The operating cost is much lower than other polishing and grinding equipment.

04

Noise reduction

The high-speed magnetic field of the grinder polisher drives the steel needle to move regularly, and there is almost no collision between the workpieces. In addition, the liquid also greatly reduces the noise.

05

 

 

Applications of Grinder And Polisher

Automotive: Used for finishing engine parts, chassis components, and body panels. Achieves smoothness and corrosion resistance, improving performance and aesthetics.


Electronics: Critical for polishing circuit boards, connectors, and micro-components. Ensures precision and reduces defects.


Jewelry and Watches: Used to polish precious metals and gemstones, enhancing visual appeal and value.


Aerospace: Ensures high-precision finishing of turbine blades, fuselage parts, and other critical components, meeting strict safety standards.

Grinding Stone Grinder

 

 
Process Flow of Grinder And Polisher
 
01/

Preparation
The workpiece is secured on a stable surface or fixture. Operators select the appropriate abrasive type and grit size based on the material and finish required.

02/

Initial Grinding
The abrasive wheel or belt is brought into contact with the workpiece at a controlled speed. This step removes rough edges, burrs, and surface imperfections.

03/

Refinement
The abrasive grit is gradually finer, and the process continues to smooth the surface. Operators may switch between different abrasives to achieve the desired finish.

04/

Polishing
A polishing wheel or pad, often with finer abrasives or compounds, is used to produce a shiny, reflective surface. This step enhances aesthetic appeal and surface quality.

05/

Inspection and Adjustment
The finished surface is inspected for uniformity and quality. Adjustments are made to speed, pressure, or abrasive type as needed for optimal results.

06/

Cleaning
The workpiece is cleaned to remove residual abrasive particles and debris, ensuring a pristine finish.

 

Packing List

 

Name

Specification

Qty

Machine Body

 

1 set

Grinding and Polishing Disc

230mm

2 pcs

Ferrule

 

2 pcs

Abrasive Paper

230mm

6 pcs

Polishing Cloth

230mm

1 pc

Water Inlet Pipe

 

1 pc

Water Outlet Pipe

Φ32mm

1 pc

Water Inlet Filter Screen

 

1 pc

Usage Instruction Manual

 

1 copy

 

Customizable Options
 

Operation Mode

Manual, Semi-automatic, Fully automatic

Disc Diameter

200 mm, 250 mm, 300 mm

Holder Size

25, 30, 40, 50 mm

Cooling System

Water cooling, Closed-loop cooling

 

Packaging and Shipping

 

Packaging

Standard export wooden crate packaging

Shipping

We can arrange the shipment for our clients accordingly by sea and air. Trading terms FOB, CIF, EXW etc.

 

Our Factory

 

SCTMC is located in the Lingang New Area of Shanghai Free Trade Zone, with a 13000M2 production base and a brand new standard industrial plant. 

productcate-1-1
productcate-1-1

 

Our Certificates

 

 

productcate-1000-1377
productcate-1000-1377
productcate-1-1
productcate-1-1
productcate-1-1
productcate-1-1
 

 

FAQ

Q: What is the difference between a grinder and a polisher?

A: A grinder aggressively removes material for shaping and rough finishing (high power, coarse abrasives, fast RPMs), while a polisher refines surfaces for smoothness and shine (lower power, fine pads/compounds, lower/variable RPMs). Think of grinding as taking a chunk off, and polishing as smoothing out the marks left by grinding; grinders have torque and guards for heavy metalwork, whereas polishers use softer pads and slower speeds to avoid burning paint or creating heat, making them ideal for car detailing.

Q: What should you not do with a grinder?

A: Don't stand in front of or in line with a grinding wheel whenever a bench grinding machine is started. Don't grind on the side of the wheel. Don't jam the work into the wheel. Don't grind material for which the wheel is not designed.

Q: Will a grinder remove rust?

A: You can get rust off hard-to-reach areas using the same disc with a die grinder.

Q: How do I pick the best abrasives for polishing and grinding?

A: Choose abrasives based on the material you are working with and the finish you want. Use silicon carbide, aluminum oxide, or diamond abrasives with coarser grits (60–600) for grinding. Use diamond paste, alumina, or colloidal silica with finer grits (0.05–6 micrometres) to polish. When deciding between these options, think about how hard your material is.

Q: What environmental requirements are there for grinder and polisher installation?

A: To ensure the accuracy and stability of the equipment, we recommend installing it on a stable foundation or platform in a clean environment with ambient temperatures between 10°C and 30°C, humidity below 65%, free from corrosive gases, strong electromagnetic interference, intense vibrations, and airflow impacts.

As one of the most professional grinder and polisher manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy customized grinder and polisher made in China here from our factory. For quotation, contact us now.

Product Recommended
Send Inquiry
Contact usif have any question

You can either contact us via phone, email or online form below. Our specialist will contact you back shortly.

Contact now!