The Yato 18V cordless reciprocating saw is powered by an 18V DC (direct current) source and a standard 4000 mAh Li-Ion battery. The saw's key performance metrics are a stroke rate of 0–3000 min⁻¹ combined with a 22 mm stroke length, which enables efficient material removal. The standard 1/2″ (12.7 mm) chuck ensures mechanical compatibility with the most common reciprocating saw blades on the market, regardless of manufacturer. The total weight of the tool has been optimized to be minimal, with the saw body itself weighing only 1.5 kg.

In terms of powertrain and motor, the device utilizes brushless motor technology. The brushless design eliminates physical friction between the rotor and stator, which reduces the device's heat load and improves the efficiency of the 18V battery compared to a traditional brushed motor, extending operating time. The tool's control electronics support mechanical stroke rate adjustment via the switch response without a separate electronic speed pre-selection. The device also features an integrated battery charge indicator to enable accurate electrical power monitoring.

The cutting capacity is mechanically calibrated according to material densities; the device's certified maximum cutting depth for wood is 150 mm, and the corresponding maximum depth for metal is 6 mm. Structural electrical safety meets the requirements of insulation class III. The system's acoustic emission during operation produces a sound pressure level (LpA) of 87.3 ± 5.0 dB(A) and a sound power level (LwA) of 95.3 ± 5.0 dB(A), necessitating the use of professional protective equipment.

The mechanical enclosure rating of the tool body is IPX0, meaning it is unprotected against water ingress. Mechanical vibration exposure in the control handles varies at levels of 7.2 ± 1.5 / 9.4 ± 1.5 m/s² depending on the material being cut and the blade used. The assembly includes a fast charger, which allows the included 4.0 Ah capacity battery to reach maximum electrical charge in exactly 2 hours.

Intended use and suitability:

The device's 18V voltage and brushless motor design are suitable for mobile installation work and mechanical dismantling. The device's 1.5 kg weight allows for safe operation during overhead work phases.

• Structural demolition work: The 22 mm stroke length and 150 mm maximum capacity for wood enable efficient sawing of studding, construction timber, and partition walls in demolition sites.
• HVAC and plumbing installations: The 6 mm cutting capacity for metal is suitable for cutting steel pipes, copper pipes, and installation rails directly at the point of use.
• Fieldwork without mains power: The 4.0 Ah Li-Ion battery combined with 2-hour fast charging provides an autonomous power supply in locations where fixed mains power is not available.

Package contents:

Product package with code YT-828151 is delivered as a ready-to-use set.

• Yato cordless reciprocating saw YT-828151
• 18V 4.0 Ah Li-Ion battery
• Battery charger (2-hour charging time)

Features:

The key features of the device are based on minimizing motor friction and standardized mechanical connections.

• Brushless motor technology: Eliminates mechanical friction of the rotor, which reduces heat load and optimizes the 18V battery discharge cycle.
• Standard 1/2″ (12.7 mm) blade chuck: Allows installation of all industry-standard reciprocating saw blades regardless of blade manufacturer.
• Stepless speed control: Allows infinitely variable control of the stroke rate (0-3000 min⁻¹) directly by physical pressure on the switch.
• Battery charge indicator: Enables real-time visual monitoring of remaining charge, preventing unexpected work interruptions.

Technical Specifications:

Precise numerical breakdown of the device's mechanical and electrical values.

• Operating voltage: 18 V d.c.
• Battery type and capacity: Li-Ion, 4000 mAh.
• Stroke rate: 0-3000 min⁻¹.
• Stroke length: 22 mm.
• Maximum cutting depth (wood): 150 mm.
• Maximum cutting depth (metal): 6 mm.
• Blade attachment: 1/2″ (12.7 mm) standard.
• Weight (without blade): 1.5 kg.
• Charging time: 2 h.
• Sound pressure level (LpA): 87.3 ± 5.0 dB(A).
• Sound power level (LwA): 95.3 ± 5.0 dB(A).
• Vibration level: 7.2 ± 1.5 / 9.4 ± 1.5 m/s².
• Insulation class: Class III.
• Enclosure protection class: IPX0.

Yato YT-828151 User Manual:

Precise mechanical procedures for safe operation of the device.

• 1. Blade installation: Always remove the 18V battery from the saw body before installing the blade to ensure safety. Twist the quick chuck, insert the 1/2″ blade tang all the way into the base of the chuck, and release the quick chuck to ensure mechanical locking.
• 2. Power connection: Use the charger to ensure the 4.0Ah battery is fully charged (2-hour cycle). Slide the battery into the rail at the bottom of the handle until an audible click confirms mechanical locking.
• 3. Sawing process: Place the saw's metal support shoe firmly against the material to be cut to prevent vibration from being transmitted to the tool. Adjust the stroke rate (0-3000 min⁻¹) infinitely by physical finger pressure on the switch.
• 4. Maintenance: Remove the battery immediately after completing the work phase. Clean the motor's ventilation openings and the 1/2″ blade chuck of mechanical dust with compressed air to ensure adequate ventilation.

Warnings:

Critical technical warnings to ensure electrical and work safety.

• Acoustic exposure: The tool produces a sound power level of 95.3 dB(A) when operating. Standard hearing protection is absolutely mandatory to prevent permanent hearing damage.
• Vibration exposure: The tool's generated vibration level of 9.4 m/s² requires continuous monitoring of exposure time during long-term demolition work to prevent circulatory disorders.
• Electrical safety: The IPX0 enclosure rating does not provide protection against water ingress. Exposing the tool to rain or moisture creates a risk of short circuit.
• Hidden structures: Ensure the backgrounds of closed wall structures are checked with appropriate equipment before cutting through to prevent unintentional cutting of live wires.

Frequently Asked Questions, FAQ:

• Are blades from other manufacturers compatible with the Yato YT-828151 saw? Yes, the device is equipped with an industry-standard 1/2″ (12.7 mm) blade chuck, which is mechanically compatible with all standard blades, regardless of brand.
• How long does it take for the included battery to charge from empty to full? A full charging cycle between the fast charger included in the device package and the 4000 mAh Li-Ion battery takes exactly 2 hours.
• Does this product code include a battery and charger, or is it just the bare tool? Product number YT-828151 is supplied as a ready-to-use installation kit, which includes the reciprocating saw body, one 18V 4.0Ah Li-Ion battery, and a compatible charger. The bare tool model is available under product number YT-828152.
• What are the saw's maximum capacity and stroke length for structural demolition? The saw's 22 mm stroke length structurally allows a maximum cutting capacity of 150 mm for wood materials and 6 mm for metal profiles.

Recycling Instructions:

Material-specific recycling instructions according to industrial and professional use regulations.

• Saw body and charger: Devices containing electronic components and a motor must be delivered to an official waste electrical and electronic equipment (WEEE) collection point at the end of their lifecycle. The device must not be disposed of as mixed waste.
• Li-Ion battery: The 18V lithium-ion battery contains reactive materials. Tape the mechanical contact terminals of the battery to prevent short circuits and return it to an approved battery collection point.
• Packaging materials: The cardboard delivery packaging of the device should be sorted for cardboard recycling, and the protective plastics of the components for plastic recycling for reuse.