The provided document is a parts breakdown and list for a Makita tool, specifically identified by the model number "1902". Based on the visual representation and the listed components, this device appears to be an electric planer, a power tool used for shaving thin layers of wood from the surface of a workpiece.
Function Description:
The Makita 1902 electric planer is designed for woodworking tasks that require precise material removal to achieve smooth surfaces, reduce thickness, or create specific profiles like chamfers. Its primary function is to plane wood surfaces quickly and efficiently, offering an alternative to manual planing for larger or more demanding projects. The tool operates by means of a rotating cutter head equipped with blades that shave off wood as the tool is pushed across the material. The depth of cut can be adjusted, allowing for fine control over the amount of material removed in each pass. This makes it suitable for tasks such as fitting doors, leveling uneven wood, or preparing lumber for joinery.
Important Technical Specifications:
While specific power ratings (e.g., motor wattage, RPM) are not explicitly detailed in the parts list, several components provide clues about the tool's construction and capabilities:
- Motor and Drive System: The presence of an "ARMATURE ASS'Y 115V" (Part ID 511936-3) and a "FIELD ASS'Y 115V" (Part ID 593116-3) confirms it is an AC-powered electric tool designed for 115V operation. The "B. BEARING 6000LLB" (Part ID 211061-7) and "B. BEARING 627LB" (Part ID 211028-5) are crucial for the smooth rotation of the armature. The "POLY V BELT" (Part ID 225071-8) and "V-PULLEY 4-18L" (Part ID 222145-6) along with "V-PULLEY 4-38" (Part ID 222146-4) indicate a belt-driven system, which typically connects the motor to the cutter head. This design often helps in reducing vibration and noise while transferring power efficiently.
- Cutter Head and Blades: The "DRUM PLATE SET" (Part ID 345007-2) and "DOUBLE EDGED BLADE SET, N1900B" (Part ID D-16966) are central to the planing action. The term "double-edged" suggests that the blades can be flipped over to use a fresh cutting edge once one side becomes dull, extending their lifespan. The "BLADE GAUGE" (Part ID 123062-2) is a critical accessory for accurately setting the blades.
- Depth Adjustment: The "ADJUST PLATE" (Part ID 342430-2) and "SCALE PLATE, N1900B" (Part ID 812137-9) indicate that the tool features a mechanism for adjusting the depth of cut, allowing users to control the amount of material removed per pass. The "KNOB 46" (Part ID 271231-0) is likely the control for this adjustment.
- Housing and Ergonomics: The "MAIN FRAME CPL." (Part ID 150847-3), "HANDLE COVER" (Part ID 411170-4), and "FRONT BASE" (Part ID 316963-3) form the main body and user interface of the tool. The "CORD GUARD" (Part ID 682502-4) and "CORD (2X18X8 SJT)" (Part ID 664013-1) ensure power delivery and protection for the electrical cord.
Usage Features:
- Portability: As an electric planer, the Makita 1902 is designed to be handheld and portable, allowing it to be moved along the workpiece.
- Depth Control: The adjustable depth of cut, facilitated by the "KNOB 46" and "SCALE PLATE," is a key feature for precision work, enabling users to remove very thin layers for fine finishing or deeper cuts for rapid material removal.
- Ergonomic Design: The "HANDLE COVER" suggests attention to user comfort and grip during operation.
- Dust Management: The "CHIP COVER" (Part ID 416523-2) indicates a system for managing wood chips and dust, which is important for maintaining a clean workspace and clear visibility of the workpiece. While not explicitly stated, many modern planers include a port for connecting a dust bag or vacuum system.
- Switch Mechanism: The "SWITCH" (Part ID 651232-8) is the primary control for activating and deactivating the tool.
Maintenance Features:
- Replaceable Blades: The "DOUBLE EDGED BLADE SET" (Part ID D-16966) highlights that the cutting blades are replaceable. This is a standard maintenance item for planers, as blades dull over time and require sharpening or replacement to maintain cutting performance. The double-edged design offers extended use before replacement is necessary.
- Carbon Brush System: The presence of "CARBON BRUSH 76" (Part ID 191947-0) and "CARBON BRUSH SET CB-76" (Part ID 194972-0), along with "BRUSH CAP" (Part ID 643550-8), indicates that the motor is a brushed type. Carbon brushes are wear items in brushed motors and need periodic inspection and replacement when they wear down. The "BRUSH CAP" provides easy access for this maintenance task.
- Bearing Replacement: Various bearings, such as "B. BEARING 6000LLB" and "B. BEARING 627LB," are listed. Bearings are critical for the smooth operation of rotating parts and can be replaced if they become worn or noisy, extending the life of the tool.
- Belt Replacement: The "POLY V BELT" (Part ID 225071-8) is a drive component that can wear out or break over time. Its inclusion in the parts list confirms it is a replaceable item, allowing for continued operation of the tool.
- Cord and Strain Relief: The "CORD (2X18X8 SJT)" and "STRAIN RELIEF" (Part ID 687063-9) are replaceable components, ensuring the electrical integrity and safety of the tool can be maintained.
- General Fasteners: A variety of screws (e.g., "P.H. SCREW M4X16," "P.H. SCREW M4X18," "PAN HEAD SCREW M4X60") are listed, indicating that the tool is designed to be disassembled for repair and component replacement, facilitating comprehensive maintenance.
In summary, the Makita 1902 is a robust electric planer designed for efficient and precise woodworking. Its construction, featuring a 115V brushed motor, belt-driven cutter head with double-edged blades, and adjustable depth control, makes it a versatile tool for various planing applications. The availability of replacement parts for wear items like blades, carbon brushes, and bearings underscores its design for long-term serviceability and maintenance.
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