braun simplex rock crusher
Braun Simplex Rock Crusher: A Reliable Tool for Mineral Sampling
The Braun Simplex rock crusher is a compact and durable device designed for crushing small samples of rocks, ores, and minerals. Originally manufactured by Bico Braun International, this crusher has been a trusted tool among geologists, prospectors, and assayers for decades. Its robust construction and efficient operation make it ideal for laboratory use or field sampling.
Design and Functionality
The Braun Simplex crusher features a sturdy cast iron frame with a hand-operated lever mechanism. The crushing chamber consists of two hardened steel plates—one stationary and one movable—that apply pressure to break down materials into fine particles. The adjustable gap between the plates allows users to control the final particle size, ensuring consistent results for analysis.

Unlike motorized crushers, the Braun Simplex relies on manual operation, making it highly portable and suitable for remote locations where electricity is unavailable. Despite its simplicity, it delivers reliable performance for processing gold-bearing quartz, hard rock specimens, or other mineral samples.
Applications in Geology and Mining
This crusher is widely used in mineral exploration and assay labs due to its precision and ease of use. Key applications include:
- Sample Preparation: Crushing ore samples before chemical analysis or fire assaying.
- Prospecting: Breaking down small rock specimens to identify valuable minerals or metals.
- Education: Teaching students basic mineral processing techniques in geology courses.

Because of its durability, many vintage Braun Simplex crushers remain operational today, often sought after by collectors and small-scale miners who appreciate their reliability.
Maintenance and Longevity
To ensure optimal performance, regular maintenance is recommended:
- Clean the crushing plates after each use to prevent cross-contamination between samples.
- Periodically lubricate moving parts to reduce wear on the lever mechanism.
- Inspect the steel plates for signs of excessive wear; replacements are available if needed.
With proper care, a Braun Simplex rock crusher can last decades—proof of its high-quality engineering from an era when tools were built to endure harsh conditions.
Where to Find a Braun Simplex Crusher
While no longer in production, these crushers can still be found through online marketplaces specializing in vintage mining equipment or used laboratory instruments. Collectors often restore them to working condition due to their historical significance in early 20th-century mining operations.
For modern alternatives with similar
