Mirka DEROS II 5650 Random Orbital Sander
The Mirka DEROS II 5650 is a direct electric random orbital sander manufactured by Mirka, designed for effective and dust-free sanding applications. The model designation "5650" indicates its capability to accommodate both 125mm and 150mm backing pads with a 5.0mm orbital diameter. As the second generation of the DEROS series, this tool represents a significant evolution from its predecessor, incorporating numerous improvements based on user feedback and technological advancement.
The sander is characterized by its brushless electric motor rated at 400W, which provides consistent power delivery across its variable speed range of 4,000 to 10,000 revolutions per minute. The DEROS II 5650 is supplied in a high-quality plastic case alongside its 2-in-1 backing pad solution, making it immediately ready for deployment in professional environments. The tool's 5.0mm oscillation is specifically engineered for general-purpose sanding operations, representing the most commonly used orbit size that achieves an optimal balance between material removal rates and surface finish quality.
The DEROS II incorporates Bluetooth connectivity for integration with Mirka's myMirka mobile application, enabling real-time vibration monitoring and tool management. As part of Mirka's comprehensive dust-free sanding solution, the tool is designed to connect to central vacuum extraction systems, promoting healthier and safer working conditions when used in conjunction with Mirka's mesh abrasive systems.
Technical Specifications
Power and Performance
The Mirka DEROS II 5650 is equipped with a high-efficiency brushless motor rated at 400W power input, operating on 220-240 VAC with a UK-style plug configuration. The brushless motor design eliminates the need for carbon brush replacement and provides extended operational life compared to traditional brush motors. The sander features a variable speed range between 4,000 and 10,000 revolutions per minute, allowing operators to adjust the rotational speed to suit different materials and applications. According to manufacturer specifications, the brushless motor delivers up to 20% more sanding power than the original DEROS model while maintaining consistent speed under heavy load conditions.
Operational Characteristics
The tool produces a noise level of 71.0 dB (LpA), which is relatively low for electric sanders in this power category. The vibration level is measured at 3.4 m/s², contributing to reduced operator fatigue during extended use periods. These low vibration values are achieved through the tool's balanced design and the incorporation of an integrated vibration sensor that monitors operational characteristics. The orbital action is classified as random orbital type with a 5.0mm orbit diameter, meaning the sanding pad rotates while simultaneously moving in small orbital circles to prevent visible scratch patterns on the workpiece.
Physical Specifications
The DEROS II 5650 has a total weight of 1 kilogram, making it lightweight enough for overhead work while maintaining sufficient mass for effective material removal. The tool is described as having a low-profile and lightweight design that facilitates access to confined spaces and reduces operator strain during prolonged use.
Pad Configuration and Connectivity
The sander accommodates two interchangeable backing pad sizes: 125mm (5 inches) and 150mm (6 inches) diameter. The tool is supplied with specific backing pad models 8292502511 for 125mm and 8292605011 for 150mm, both featuring net-style construction for optimal dust extraction through the abrasive disc. The DEROS II is central vacuum ready, designed to connect directly to dust extraction systems for continuous dust removal during operation. The tool features Bluetooth connectivity for wireless communication with mobile devices running the myMirka application.
Key Features
Motor Technology
The DEROS II incorporates a long-life and high-efficiency brushless motor that represents a significant technological advancement over traditional brush-type motors. The brushless design eliminates the periodic maintenance requirement of replacing worn carbon brushes while delivering enhanced power efficiency and extended operational lifespan. According to specifications, the brushless motor maintains consistent speed under heavy load and can effortlessly tackle demanding jobs and heavy applications that would cause traditional motors to bog down or stall.
Ergonomic Design
The DEROS II features a compact, ergonomic design that prioritizes operator comfort during extended use periods. The low-profile construction allows the tool to access tight spaces and confined areas while maintaining a balanced feel in the user's hand. The sander's symmetrical design ensures that it can be held and manipulated comfortably regardless of hand orientation or working position. Due to its low noise level and low vibration values, the DEROS II can be used for long periods without causing operator fatigue, a critical consideration in professional environments where sanders may be operated for multiple hours daily.
User Interface and Controls
The tool incorporates an easy-to-operate lever for adjusting sanding speed that allows quick changes to rotational speed without interrupting work. The new design features clearly visible LED indicators for the speed selector that provide immediate visual feedback on the current operating speed, eliminating guesswork about the selected RPM setting. Additionally, the DEROS II includes a separate on/off switch, distinguishing power control from speed adjustment and preventing accidental speed changes during operation.
Smart Technology Integration
The DEROS II features an integrated vibration sensor that continuously monitors the tool's operational characteristics during use. This sensor works in conjunction with the Bluetooth connectivity to enable communication with Mirka's myMirka mobile application. Through this connection, operators can monitor vibration levels in real-time, track tool usage patterns, and receive maintenance notifications. This smart technology integration allows for proactive tool management and helps ensure compliance with occupational health and safety regulations regarding hand-arm vibration exposure.
Dust Extraction System
As part of Mirka's dust-free sanding solution, the DEROS II enables efficient dust-free sanding when connected to appropriate extraction equipment. The tool is designed to connect directly to Mirka's dust extractor systems through a vacuum hose connection. When used with Mirka's net-style backing pads and mesh abrasive products such as Abranet, the system achieves highly efficient dust collection by allowing suction to occur directly through the abrasive disc. This comprehensive dust extraction approach promotes a healthier and safer working environment by minimizing airborne particulate matter and maintaining visibility of the work surface.
Applications
General Purpose Sanding
The Mirka DEROS II 5650 is designed for effective and dust-free sanding of all kinds of surfaces, making it a versatile tool for multiple industries and applications. The 5.0mm oscillation is suitable for general purpose sanding, representing the most commonly used orbit size in professional applications. This orbital diameter achieves a good balance between stock removal and surface finish, making it effective for both intermediate sanding stages where material needs to be removed and final finishing operations where surface quality is paramount.
Professional Trade Applications
The tool's combination of power and precision makes it well-suited for professional woodworking, furniture manufacturing, and cabinetmaking operations. The ability to switch between 125mm and 150mm backing padsprovides flexibility when working on different sized workpieces or accessing areas with varying space constraints. The smaller 125mm pad configuration allows for greater maneuverability in confined spaces and when working on detailed components, while the larger 150mm pad offers increased coverage area for faster work on larger flat surfaces.
Refinishing and Restoration
The DEROS II's dust extraction capabilities and variable speed control make it particularly suitable for refinishing and restoration work where cleanliness and surface quality are critical. The tool's compact and ergonomic design allows operators to work on vertical surfaces, overhead applications, and in other challenging positions without excessive fatigue. The random orbital action eliminates the risk of visible circular scratch patterns that can occur with rotary sanders, producing a scratch pattern that is virtually invisible to the naked eye.
Heavy-Duty Operations
Despite its relatively lightweight construction, the DEROS II is capable of handling demanding applications. The brushless motor can effortlessly tackle demanding jobs and heavy applications, maintaining consistent performance even under sustained load. This capability makes the tool suitable for industrial production environments where continuous operation is required. The high operator comfort characteristics ensure that the tool can be used for long periods without causing excessive fatigue to the operator, a critical factor in maintaining productivity and work quality throughout extended shifts.
Material Versatility
While the documentation does not explicitly enumerate all compatible materials, the tool's designation as a general-purpose sander and its variable speed control suggest suitability for multiple substrate types. The ability to adjust rotational speed allows operators to optimize performance for different material densities and hardnesses, from softwoods that require lower speeds to prevent excessive material removal, to harder materials that benefit from higher speeds for efficient stock removal.