Differences Between Proxxon LWB and LHW – Tool Mounting, Advantages and Disadvantages
The Proxxon brand has long been among the top names in the field of precision electric tools. Its products are used in modeling, fine mechanics, restoration, and by professional craftsmen. Two popular models, the Proxxon LWB and Proxxon LHW, may look similar at first glance. Both have a slim body, high RPM, and a high-quality gearbox. The real difference between them, however, does not lie only in their intended use, but mainly in the way tools are mounted. This factor determines the precision, stability, and type of work for which each tool is best suited.
The Proxxon LWB, produced in several versions (such as LWB/E or LWB/A), is designed as an angled micro drill or milling machine with a long neck. It allows work even in hard-to-reach areas and uses the MICROMOT collet clamping system. This set of precision steel collets enables the clamping of shank tools from 1.0 to 3.2 millimeters in diameter. As a result, it achieves high rotational accuracy and minimal runout. The tool is ideal for fine drilling, milling, or detailed machining of metal, plastic, and ceramics. The speed control, up to 20,000 rpm, allows precise work without overheating the material while maintaining excellent control over the result.
The Proxxon LHW, on the other hand, is an angle grinder designed for cutting, grinding, and shaping materials. Its construction is more robust, the gearbox head is made of cast aluminum, and the entire tool is optimized for transferring higher lateral forces. The LHW does not use collets but a classic disc mounting system with a bore and nut. This allows for the use of a wide range of cutting and grinding discs, often with a diameter of around 50 millimeters. For this reason, the LHW is an excellent choice for tilers, stonemasons, restorers, and anyone who needs to grind and cut hard materials with stability and confidence.
The difference between the two models lies mainly in their philosophy. The LWB, with its collet system, offers high precision because the tool is tightly clamped around its entire circumference. This ensures a very stable rotation without noticeable offset. However, this system requires cleanliness and maintenance. The collets are sensitive to dust and dirt and can wear out over time. Their main limitation is also size – larger discs or tools with differently shaped shanks cannot be mounted. On the other hand, during delicate work, the LWB provides perfect control, smooth operation, and precision results that standard grinders cannot achieve.
The disc mounting system of the LHW is structurally simpler and considerably more durable. The disc is attached using a screw or nut, ensuring a firm and stable connection. The advantage is the ability to use a wide range of grinding, cutting, or flap discs available on the market. The LHW can handle higher side loads, which makes it suitable for demanding work. Its disadvantage compared to the LWB is lower rotational precision since the discs are not mounted with the same axial accuracy as collets. If the disc is unbalanced, it can cause vibration or eccentric motion, which transfers to the hand and the work surface. Frequent tightening and loosening of nuts may also wear the threads or washers over time.
From a practical point of view, the LWB is better suited for fine, precise work where detail, smooth surface, and accuracy are the priority. The LHW, in contrast, is a tool for heavier-duty applications where greater material removal and durability are required. Both systems complement each other perfectly in a workshop – the LWB covers delicate operations, while the LHW handles rougher and more forceful tasks.
In terms of maintenance, attention should be paid primarily to keeping the clamping parts clean. Collets should be cleaned and lightly lubricated regularly; otherwise, runout may increase. For the LHW, it is advisable to check the threads and washers frequently to prevent the disc from loosening. In both cases, using original Proxxon accessories is recommended to ensure proper balance and precision.
Choosing between the LWB and LHW should not depend only on price or power but mainly on the type of work. Those who need to drill, mill, and handle fine details will appreciate the LWB. Those who need to cut, grind, or shape hard materials will choose the LHW. Many professionals, however, use both tools in combination – the LWB for precise work and the LHW for rapid material removal and shaping.
When using both models, it is important to follow basic safety rules. Discs must always be correctly balanced and checked before operation. Collets should not be worn, and tools must be securely fastened but not over-tightened. Each tool has its limits, which should not be exceeded. Only then can you achieve results that reflect the quality Proxxon stands for.
In conclusion, the collet system of the LWB represents a precision instrument for detailed work, while the LHW with its disc mounting system offers strength, versatility, and durability. Both models have their rightful place in any workshop – the LWB brings accuracy, the LHW delivers power. For craftsmen who want to combine delicacy with force, owning both tools is the ideal solution. Together, they give the user the freedom to choose the right tool for the job, not just a compromise.