125mm Right-Angle Air Grinder
● High-efficiency speed: no-load 10,000 rpm (±10% fluctuation), high grinding efficiency.
● Energy-saving design: the load gas consumption is less than 17 liters per second, and the energy consumption is lower than the industry average.
● High compatibility: standard 13mm air pipe, suitable for industrial air source systems.
Product introduction
The SJ125 pneumatic angle grinder is a professional pneumatic tool designed specifically for industrial surface treatment. It is highly favored in the industrial sector due to its powerful performance and excellent reliability. Driven by compressed air, it is intrinsically safe and explosion-proof, with no electric sparks generated, making it particularly suitable for use in environments with risks of flammability and explosion, such as shipbuilding, petrochemicals, and mining. Its ergonomic design, relatively light weight (2.2 kilograms), and power output of 0.38 kilowatts help reduce the operator's labor intensity and improve work efficiency.
SJ125 product Parameter (specification)
|
Parameter name |
Unit |
Data |
|
Weight |
kg |
2.2 |
|
Idle speed |
r/min |
10000±10% |
|
Load speed |
r/min |
≥6000 |
|
Air consumption |
L/s |
≤17 |
|
The maximum diameter of the grinding wheel |
mm |
Φ125 |
|
Power |
kW |
≥0.38 |
|
Tracheal diameter |
mm |
φ13 |
|
Operating pressure |
MPa |
0.63 |
Product feature and application
Structural features:
Strong power: idle speed can reach up to 10,000 RPM, easily handling tasks such as removing burrs from castings, grinding weld seams, and polishing metal surfaces.
Safety explosion-proof: pneumatically driven, no electric sparks, especially suitable for flammable and explosive environments such as ships and chemical industries, safe and reliable.
Lightweight and agile: The body features lightweight design, weighing only 2.2 kg, making operation effortless and reducing fatigue during prolonged use.
Optimized design: The horizontal grip design improves human-machine interaction and enhances control stability, significantly increasing comfort, precision, and safety during long periods of high-intensity grinding work.
Economical and durable: low gas consumption per unit power, cost-effective energy use; industrial-grade materials, robust and long-lasting.
Application fields:
Weld seam grinding: used to trim and grind the weld seam after metal welding, making it smooth and even.
Deburring castings: effectively removing burrs, flash, and oxide scale from the surface of castings.
Metal surface treatment: can be used for rust removal, polishing, and processing of metal components.
Production details
Corner drive design: achieves power steering, with the grinding head at a right angle to the machine body, greatly enhancing approachability and operability in confined and deep cavities and other restricted spaces.
Precision forging + CNC machining: Made from heavy industry-grade materials, supports long-term overload operation without failure, worry-free after-sales service!
Industrial explosion-proof design + 125mm precision grinding head: specifically designed for high-intensity work in ships/chemical industries.
Why choose us
Multifunctional application
- Involves multiple processes from rough grinding to fine grinding: grinding weld seams, removing burrs from castings, and surface finishing of molds.
- Rust removal, polishing, and buffing of metal materials: expanded functions to meet various surface treatment needs.
Safety and reliability
- Pneumatic drive: inherently safe explosion-proof, no electric motor sparks, especially suitable for flammable and explosive environments such as ships and chemical industries.
- The work is stable and reliable: ensuring the operation process is stable and controllable.
Easy to use, simple to maintain
- Compact structure, easy to operate: convenient to carry, quick to learn.
- Maintenance: Routine maintenance is simple. Economy.
Economic
- Energy consumption economy: low gas consumption per unit power, low usage cost.
- High durability: long lifespan, high reliability, reduced failure rate, and lower replacement frequency.
FAQ
Q: Common faults and handling methods for SJ125 pneumatic grinding wheels are as follows:
A:
|
Fault |
Reason |
Exclusion method |
|
After air is supplied, the machine does not turn or operates abnormally. |
The rotor end face is jammed with the front and rear cover planes of the cylinder. The blades are either too long, worn out, or damaged, causing the rotor to jam. The clearance at both ends of the rotor is not appropriate. The ball bearings are not clean. The viscosity of the lubricating oil is too high. |
The front and rear covers of the cylinder must be installed correctly and must not be tilted. Grind the blade length so that it is slightly shorter than the rotor end face, or replace the blade. Adjust the clearance as specified (0.025-0.04mm on one side). 4. Clean thoroughly and reapply lubricating grease. 5. Choose an alternative lubricant. |
|
Performance has abnormally declined. |
Low pipeline pressure or peeling of the inner wall of the pipe increases resistance. The internal air passages or filters of the machine are blocked by dirt. The internal parts of the engine are excessively worn. Poor lubrication. |
Check the tightness of the piping or replace the hoses to reduce pressure loss and ensure sufficient air pressure. Wash thoroughly. Need to replace new parts. It is necessary to lubricate at regular intervals. |
|
Increased gas consumption |
1Air leakage in the vent pipe and at each connection point. 2.The slider does not meet the specified dimensions or has worn excessively. 3.The clearance between the rotor and the cylinder is large. 4.The end face grinding marks on the front and rear covers of the cylinder are too deep. |
1. Inspect and maintain the pipelines and all connection points to eliminate any gas leaks. 2. Need to replace the new slider. 3. Adjust the gap as required. 4. to grind the flat surface |
|
The machine is overheating in some parts. |
1.The gap is not suitable, and the part surfaces heat up due to friction. 2.The lubrication condition is poor, resulting in dry friction. 3.The assembly quality is not high, and there are binding issues between parts. |
1.Ensure there is a reasonable assembly clearance between parts. 2Lubricate on time to maintain good lubrication. 3.Improve assembly techniques, paying attention to the flexibility of rotating parts. |
Q: When using an 125mm Right-Angle Air Grinder, pay attention to the following technical safety regulations.
A: 1.It is essential to use high-speed grinding wheels reinforced with fibers (80 meters per second), and the diameter must comply with the specified requirements.
2.When working, frequently check if the connections are secure and sealed. The clamping screws that hold the grinding wheel must be tightened.
3.When working, the contact force between the grinding wheel and the workpiece should not be too large, and the grinding wheel must not collide with the workpiece to avoid breaking the grinding wheel.
4.When work is finished, first close the pipeline valve, then disassemble the air hose.
Q: What precautions should be taken when using and maintaining an SJ125 air grinding wheel?
A: 1.The air pressure should be maintained between 0.49 and 0.63 megapascals. The internal diameter of the tube should meet the requirements. There should be an air filter on the pipeline to prevent contaminants from entering the machine.
2.Lubricate every one or two hours of work, using L-AN all-purpose lubricating oil (GB443-89). It is best to have an oil injector on the pipeline for continuous lubrication of the components. When repairing, apply calcium-based grease ZG-2 (GB491-87) to the bearings.
3.The air grinder must not run idle at high air pressure to prevent excessive wear of the components.
4.The safety line speed of the grinding wheel is relatively high. To achieve better results during grinding, the end face of the grinding wheel should be at a 15-degree angle to the work surface.
5.Do not throw, drop, or bump the machine to prevent damage.
6.After work is completed, lubricating oil should be added and the machine should be run for a few seconds to prevent rusting of the parts.
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