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The Makita DSC251 is a cordless steel rod cutter designed for efficient and safe cutting of rebar. This instruction manual provides comprehensive guidance on its operation, maintenance, and safety procedures, ensuring users can maximize the tool's performance and longevity.
The DSC251 is a specialized power tool intended solely for cutting rebar. It operates on a D.C. 18V battery and features a tipped saw blade for precise and effective cutting. The tool incorporates a battery protection system for lithium-ion batteries with a star marking, which automatically cuts off power to extend battery life under conditions such as overload, low battery voltage, or overheating. This system ensures the tool's durability and prevents damage to both the tool and the battery.
The tool offers an automatic speed change function, allowing it to switch between 'high speed mode' and 'high torque mode' based on the work load. This intelligent feature optimizes cutting performance and efficiency. A battery indicator displays the remaining battery capacity, helping users manage their work and recharge the battery when necessary.
Before operation, users must thoroughly read and understand the instruction manual, paying close attention to all safety warnings and operating procedures. The tool is designed for safe use, but proper handling is crucial.
To begin, ensure the switch is in the "O" (off) position before inserting the battery cartridge. The battery cartridge should be installed firmly until it locks in place, with the red indicator no longer visible. For safety, the motor cannot be energized if the battery is inserted with the switch in the "I" (on) position.
The handle can be screwed into either a vertical or parallel position for easier operation, enhancing user comfort and control. Once the battery is inserted and the switch is in the "I" position, the motor will turn on. The switch can then be pushed down on its forward end to lock it for continuous operation.
When cutting, the guide should be positioned against the rebar. The tool should be pushed forward slowly to initiate the cut. It is crucial to maintain a 90-degree angle to the rebar to prevent shaking and overloading the tool. Users should allow the tipped saw to reach full speed before beginning to cut. Slowing down the cutting movement, especially at the beginning and end of the cut, is recommended to prevent damage to the blades and injury from flying debris. The tool should be held firmly to avoid shaking, which can shorten the life of the tipped saw and damage the blades.
After completing a cut, push down on the rear end of the switch to automatically move it to the "O" position, turning off the motor. The tool is designed exclusively for cutting rebar; attempting to cut other materials may damage the tipped saw blades.
The DSC251 is equipped with a dust bag to collect debris during operation. The dust bag should be correctly fixed over the dust bag holder and secured with drawstrings. Users should periodically check the dust bag and ensure it is not clogged, as a clogged dust cover can damage the tool.
Regular maintenance is essential for the DSC251 to ensure its safe and efficient operation. Before any inspection or maintenance, always ensure the tool is switched off and the battery is removed to prevent accidental startup and potential injury.
The tipped saw blades are a critical component and require careful attention. Before each use, inspect the blades for any chips, cracks, or wear. Damaged or worn-out blades should not be used, as they can cause further damage to the tool and serious personal injury. The instruction manual specifies that tipped saw blades cannot be resharpened and should be replaced when they become blunt, chipped, or when the cutting speed becomes very slow, or the cut piece shows heat discoloration. Only genuine Makita-supplied tipped saws with three holes that fit the output shaft pins should be used.
When replacing the tipped saw, remove the tipped saw cover by unscrewing the retaining bolts with a hexagonal wrench. Push in the lock button and rotate the blade with a hexagonal wrench until it is prevented from further rotation. Then, loosen and remove the bolt and washer, followed by the tipped saw guide and the tipped saw itself. When installing a new tipped saw, ensure it is fitted over the output shaft with the three pins correctly aligned in the blade's holes. Replace the tipped saw guide, bolt, and washer, then tighten the bolt with the hexagonal wrench while the lock button is fully pushed in. Finally, replace and firmly tighten the tipped saw cover retaining bolts.
The dust cover should be removed from the air vent and cleaned regularly to ensure proper air circulation. A clogged dust cover can lead to motor overheating and damage.
Users are advised not to use gasoline, benzine, thinner, alcohol, or similar substances for cleaning, as these can cause discoloration, deformation, or cracks. The battery cartridge should also be maintained properly. Avoid storing it in containers with other metal objects, exposing it to water or rain, or charging it at extreme temperatures (below 10°C or above 40°C). If the operating time significantly reduces, stop operation immediately, as this may indicate overheating or a risk of explosion. The battery cartridge should be charged before it is completely discharged, and overcharging should be avoided to prolong its service life. If the tool is not used for an extended period (more than six months), the battery cartridge should still be charged.
General| Cutting Depth | 25 mm |
|---|---|
| Weight | 5.7 lbs |
| Cutting Capacity (Mild Steel) | 25 mm |
| Cutting Capacity (Stainless Steel) | 20 mm |
| Voltage | 18V |
| Battery Voltage | 18V |
| Battery Type | Li-ion |
| Cutting Capacity | 25 mm |
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