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General safety guidelines and precautions for operating the sander.
Specific safety advice and protection for sanding lead-based paint.
Requirements and procedures for connecting and maintaining the air supply.
Guidance on using leader hoses and quick-change couplings to reduce vibration.
Steps for fitting the backing pad and securing sanding discs.
Instructions on proper sanding techniques and disc management.
Routine lubrication, cleaning, and troubleshooting common issues.
Information on Hand Arm Vibration Syndrome and protective measures.
Guidelines for recycling and disposing of the tool and its parts.
General safety guidelines and precautions for operating the sander.
Specific safety advice and protection for sanding lead-based paint.
Requirements and procedures for connecting and maintaining the air supply.
Guidance on using leader hoses and quick-change couplings to reduce vibration.
Steps for fitting the backing pad and securing sanding discs.
Instructions on proper sanding techniques and disc management.
Routine lubrication, cleaning, and troubleshooting common issues.
Information on Hand Arm Vibration Syndrome and protective measures.
Guidelines for recycling and disposing of the tool and its parts.
The Sealey GSA70 Air Orbital Sander Mini Disc Ø50mm is a robust and versatile tool designed for various sanding tasks. Its primary function is to provide a combined "rotary" and "random orbit" action, allowing for efficient material removal and a smooth finish. The tool is suitable for professional use in workshops and other environments where controlled sanding is required.
The GSA70 is an air-powered orbital sander that utilizes compressed air to drive its motor. The composite cover, molded around a lightweight aluminum alloy housing, helps reduce the effects of chill on the operator's hands, enhancing comfort and control during prolonged use. The air motor is equipped with quality bearings, ensuring smooth and powerful operation. A key safety feature is the fitted safety release trigger control, which prevents accidental operation, thereby minimizing the risk of injury. The exhaust outlet is designed to adjust 360°, directing airflow away from the operator for a cleaner and more comfortable working environment. The sander is supplied with a Ø50mm pad and an installation spanner, making it ready for immediate use upon connection to an air supply.
The combined "rotary" and "random orbit" action of the sander is crucial for achieving optimal results. The rotary motion provides aggressive material removal, while the random orbit action helps to prevent swirl marks and ensures a smoother, more uniform finish. Users are advised to work progressively from coarse to finer grit grades to achieve the best results, avoiding large jumps in grit size that can leave noticeable marks.
Before connecting the sander to an air supply, ensure the air valve (throttle) is in the "Off" position. The sander requires an air pressure between 70-90psi and an air flow consistent with the specifications. It is critical to ensure the air supply is clean and does not exceed 90psi, as high pressure or unclean air can significantly shorten the product's life and pose safety risks. Daily draining of the air tank is recommended to prevent water damage to the sander, which can invalidate the warranty. The air inlet filter should be cleaned weekly. For optimal performance, especially with long air hoses (over 8 meters), line pressure may need to be increased. The minimum hose diameter should be 1/4" I.D., and all fittings must have corresponding inside dimensions. Air hoses should be kept away from heat, oil, and sharp edges, and checked for wear regularly.
To fit the backing pad, the rotating head must first be locked using the locking pin. The pin is inserted through an aperture in the outer shroud after rotating the head until the locking hole is visible. The backing pad is then screwed into the threaded hole in the head and tightened. Only discs with speed ratings equal to or higher than the sander's speed rating should be used. Cloth-backed sanding discs are not recommended. After connecting the air supply, press the control valve lever to verify correct operation. The air flow can be regulated using the regulator valve at the back of the handle.
When operating, always wear approved eye or face and hand protection. Depending on the task, face, dust, or respiratory protection may be necessary, and safety ear defenders should be worn if noise levels exceed 85dB. Loose clothing, ties, watches, rings, and other jewelry should be removed, and long hair should be contained or tied back. Maintaining correct balance and footing, and wearing non-slip shoes, is essential. The workpiece must be secure, never held by hand, and checked for protruding screws, bolts, nuts, nails, or stones. Avoid unintentional starting. The sander should not be forced; allow the tool to do the work. Start the sander and bring the disc to the work surface evenly and slowly, moving it back and forth in overlapping areas. Remove the disc from the work surface before stopping the sander. Regularly check the sanding disc for wear and replace it if cracked or damaged. Avoid running the sander in "idle rotation" for extended periods, as this can reduce bearing life.
Before changing accessories, servicing, or performing maintenance, always disconnect the sander from the air supply. Only genuine parts should be used for replacements or repairs, as unauthorized parts can be dangerous and void the warranty.
If the air supply lacks an oiler, the air sander should be lubricated daily with a few drops of good grade air tool oil (such as Sealey ATO/500 or ATO/1000) dripped into the air inlet before use. After use, the sander should be cleaned, and pads replaced when necessary.
Loss of power or erratic action can be attributed to several factors:
If problems persist, contact a local Sealey service agent. For full service, contact your local Sealey service agent. When not in use, the sander should be disconnected from the air supply, cleaned, and stored in a safe, dry, childproof location.
If sanding surfaces suspected of containing lead paint (common in older paints), specific precautions must be taken. Lead dust is toxic.
Prolonged exposure to vibration from this sander poses a health risk. The tool's use must be managed adequately. The measured vibration emission value (a) is 4.5 m/s² with an uncertainty value (k) of 2.25 m/s². A specific evaluation of vibration emission should be conducted before commencing a specialist task, as the actual value can vary based on the operator, task, and inserted tool/consumable. Ensuring sufficient length of leader hoses can help reduce vibration. Poor maintenance of the tool can also increase the risk of Hand Arm Vibration Syndrome. Health surveillance is recommended to detect early symptoms of vibration injury. While no specific PPE provides complete protection against vibration injury from uncontrolled use, wearing sufficient clothing (including gloves) to stay warm and dry and maintain good blood circulation in fingers is advised. Prevention is the most effective protection. Further guidance can be found on the HSC website www.hse.gov.uk - Hand-Arm Vibration at Work.
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