Precision crushing for demanding laboratories with the BB 50 from Retsch
The BB 50 from Retsch is a bench-top jaw crusher designed to meet the specific requirements of laboratory sample preparation. Compact and ergonomic, it can be easily installed on a workbench while offering remarkable crushing performance. This device is intended for users who need to quickly and efficiently reduce the size of medium to hard materials, whether brittle, hard or slightly tough.
Thanks to its optimised grinding chamber and powerful drive system, the BB 50 can process samples with an initial size of up to 40 mm to a final fineness of less than 0.5 mm. The crushing process is based on a pressure principle, using a fixed jaw and a movable jaw driven by an eccentric shaft. The elliptical movement of the movable jaw breaks up the material, which then falls by gravity into a removable sample collector.
One of the major advantages of the BB 50 is its intuitive digital control, which allows the gap width to be precisely adjusted between 0 and 11 mm in 0.1 mm increments, as well as the jaw speed between 550 and 950 min⁻¹. This flexibility makes it possible to adapt the process to the specific characteristics of each sample. The machine also features a rotation reversal function, which is very useful for unblocking the chamber in the event of material overload.
The zero point adjustment system is another notable advantage. It compensates for gradual wear of the jaws to maintain the reproducibility of results. The device also signals when the jaws need to be replaced, thus avoiding any risk of damage to the equipment. This feature helps to extend the service life of the device while reducing maintenance costs.
Designed for safe and convenient use, the BB 50 has a large feed hopper with splash protection, ensuring safe handling of samples. Cleaning the machine is particularly easy thanks to the fold-down hopper and removable crusher arm, which can be removed without any tools. The jaws can also be easily replaced to adapt the device to different materials or to avoid cross-contamination.
The BB 50 is compatible with different jaw and wear plate materials: manganese steel, stainless steel, tungsten carbide, zirconium oxide or heavy metal-free steel. This choice allows you to optimise preparation according to analytical requirements and the nature of the samples. Additional accessories, such as a lid for the receptacle or a cyclone system, can be added to further improve the safety and cleanliness of operations.
The versatile BB 50 is used in a wide range of fields, including construction material analysis, geology, metallurgy, ceramics, glass, minerals, cement clinker, quartz, coal and tungsten alloys. Its compact size and reliable design make it an essential tool for laboratories looking for an efficient and durable solution for sample pre-grinding and crushing.
