Central Machinery 59490

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Owner’s Manual & Safety Instructions

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59490

PORTABLE SAND

BLASTER GUN KIT

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The document describes the Central Machinery Portable Sand Blaster Gun Kit, an air-powered tool designed for abrasive blasting applications.

Function Description

The Portable Sand Blaster Gun Kit is used for abrasive blasting, which involves propelling abrasive media at a surface to clean, etch, or prepare it. The tool is powered by compressed air and features a hopper for holding abrasive media. It is designed for various applications, including industrial uses, and requires the operator to follow specific safety precautions due to the nature of abrasive blasting and potential exposure to hazardous materials like crystalline silica.

The blasting process involves connecting the gun to a regulated compressed air source, filling the hopper with appropriate abrasive media (excluding silica sand), aiming the nozzle at the workpiece, and squeezing the trigger to initiate blasting. The media flow can be controlled via a knob, allowing for adjustment of the spray pattern and intensity.

Important Technical Specifications

Max. Air Pressure: 150 PSI
Air Inlet: 1/4 IN. - 18 NPT Female
Hopper Capacity: 18 OZ.
Air Flow: 7 CFM @ 90 PSI

The air supply system requires clean, dry, regulated compressed air within the rated pressure range. It is crucial not to exceed 200 PSI from the air source to prevent bursting or abnormal operation of the tool. The use of oxygen, carbon dioxide, combustible gases, or any bottled gas as an air source is strictly prohibited due to explosion risks. A 3/8" air hose is recommended for efficient operation.

Usage Features

Air Supply Setup: The tool requires an air supply system that includes a filter, regulator with pressure gauge, in-line shutoff valve, and quick coupler. An in-line shutoff ball valve is emphasized as a critical safety device for immediate air supply control. No automatic oiler system or added oil to the airline should be used, as it can contaminate the abrasive material.
Nozzle Attachment: The nozzle must be securely attached to the gun body before use by inserting the short end into the gun body, sliding the ring nut over the nozzle, and hand-tightening it onto the gun body. Tools or pliers should not be used for tightening.
Media Loading: The hopper is filled with abrasive media after removing its cap. Users are explicitly warned not to use sand (crystalline silica) for blasting due to severe health risks.
Media Flow Control: The Media Flow Control Knob (15) allows for adjustment of the abrasive media flow. Turning it counterclockwise increases flow, while clockwise decreases it. It is recommended to start blasting with the knob in the off position and slowly increase flow to achieve the desired intensity. Turning the media flow off before releasing trigger pressure helps prevent nozzle clogging.
Work Area Setup: A clean, well-lit work area free from distractions (children, pets) and hazardous objects is essential. The air hose should be routed safely to prevent tripping hazards or damage. Barriers or shields are recommended to protect people and property from flying debris. If possible, the workpiece should be placed inside a sandblast cabinet.
Safety Precautions: The manual strongly emphasizes personal safety, including wearing protective paint spraying gloves, a NIOSH-approved respirator, ANSI-approved safety goggles, and hearing protection. Loose clothing, jewelry, and long hair should be avoided. The tool should not be operated while tired or under the influence of substances. Directing the spray at people or animals is prohibited.
Silicosis and Aluminum Oxide Warnings: Extensive warnings are provided regarding the dangers of crystalline silica (silicosis, cancer, death) and aluminum oxide (eye, skin, breathing irritation). NIOSH-recommended measures to reduce exposure are detailed, including prohibiting silica sand, conducting air monitoring, using containment methods, practicing good personal hygiene, wearing protective clothing and respirators, providing medical examinations and training, and reporting silicosis cases.

Maintenance Features

Inspection: Before each use, a thorough inspection of the tool is required. This includes checking for loose screws, misalignment or binding of moving parts, a clogged nozzle, damaged air supply hose, cracked or broken parts, and any other condition affecting safe operation. Damaged equipment must not be used.
Cleaning: After use, the external surfaces of the tool should be cleaned with a clean, moist cloth and mild detergent. Solvents or immersion in liquids should be avoided to prevent damage.
Air Supply Maintenance: Daily maintenance of the air supply components (filter, regulator, etc.) should be performed according to their respective manufacturers' instructions.
Storage: The tool should be stored in a dry, secure area, out of reach of children.
Troubleshooting: A troubleshooting guide is provided for common issues like the tool not starting, blast flow surges, excessive abrasive consumption, clogging, and lack of abrasive flow, along with possible causes and solutions. Users are advised to disconnect the air supply before any service.
Service: Tool service and repairs should only be performed by qualified repair personnel using identical replacement parts. The manufacturer explicitly states that the manual is a reference tool only and does not qualify buyers to perform repairs.