RETSCH / COMPACT BENCHTOP PREPARATION

BB 50.
Small footprint. Fine preparation.

A compact benchtop jaw crusher for laboratory sample preparation, with feed below 40 mm and final fineness below 0.5 mm, depending on the material and settings.

Request a quote Technical data

RETSCH BB 50 Jaw Crusher for crushing hard, brittle samples

Explore the equipment and access details.

FEED SIZE*< 40 mm

FINAL FINENESS*< 0.5 mm

BATCH CAPACITY3 L / batch

THE MODEL IN FOCUS

Benchtop sample preparation.

Adapt the crushing cycle

Set the speed between 550 and 950 min⁻¹ to suit the material. Reverse rotation can help clear a blockage caused by overfeeding.

Set and repeat the gap

Digital gap display, 0.1 mm setting increments and gap-setting memory support controlled sample preparation. Zero-point adjustment compensates for jaw wear.

Clean between samples

Remove the fold-back hopper and crusher arm without tools. A 3 L collector and optional lid help manage sample recovery and carryover.

*Feed size, final fineness and throughput depend on the material, jaw selection, gap setting and configuration. Published capacities are not simultaneous performance guarantees.

SEE THE BB 50

Operation and access, in detail.

Original RETSCH videos demonstrate the equipment and service access.

BB 50 introduction ↗Zero-point adjustment ↗Crushing-arm access ↗

PUBLISHED MODEL DATA

The technical
picture.

BB 50 uses pressure for coarse and pre-crushing of medium-hard, hard, brittle and tough materials.

Feed size, final fineness and throughput depend on the material, jaw selection, gap setting and configuration. Published capacities are not simultaneous performance guarantees. Confirm current electrical and configuration requirements before ordering.

Original Glen Mills product page

Feed size*: < 40 mm
Final fineness*: < 0.5 mm
Throughput*: 3 l/batch
Jaw width: 45 x 59 mm
Gap width setting: 0 – 11 mm in increments 0.1 mm
Collector capacity: 3 l
Drive power: 1.1 kW
Dimensions, W × H × D: 420 x 460 x 560 mm
Net weight: ~ 79 kg

More specifications & configuration details

Applications: coarse and pre-crushing
Field of application: agriculture, biology, construction materials, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals
Feed material: medium-hard, hard, brittle, tough
Size reduction principle: pressure
Material of grinding tools: manganese steel, stainless steel, tungsten carbide, zirconium oxide, steel 1.1750 (for heavy-metal free grinding)
Gap width display: digital
Zero point adjustment: yes
Reverse rotating direction: yes
Hinged hopper: yes
Dust extraction unit: already dust-tight
Central lubrication: lifetime lubrication by manufacturer
Process line version: process line use is possible by removing drawer
Drive: 3-phase motor with frequency converter
Electrical supply data: different voltages
Power connection: 1-phase
Protection code: IP 20 / IP 00 at ventilation slots
Standards: CE

JAW MATERIALS & CONFIGURATION

The details shape
the result.

Match wear materials and the complete crushing route to the sample and the analysis.

Breaking jaws & wear plates

Published tool-material options for BB 50: manganese steel, stainless steel, tungsten carbide, zirconium oxide, steel 1.1750 (for heavy-metal free grinding). Confirm the exact combination and wear contribution for your material; a named heavy-metal-free grade does not eliminate every possible source of sample contamination.

Cleaning, collector & process-line use

The 3 L collector is available with an optional lid to help limit residues entering the next sample. Process-line use is possible by removing the drawer; discuss the complete setup.

RETSCH breaking jaws and wear plates for crushing samples in laboratory jaw crushers — Illustrative crusher components. Confirm material and configuration availability.

RETSCH BB 50 Jaw Crusher for crushing hard, brittle samples, shown connected to a cyclone collection system — Cyclone-system example shown on a BB 50. Connections and equipment vary by model.

OPTIONAL CYCLONE COLLECTION

Recover the sample.
Manage the dust.

Discuss cyclone-assisted collection to help reduce sample loss and dust exposure during crushing. Retrofit options are listed for BB 50, BB 250, BB 400 and BB 500; confirm the setup for BB 50.

Discuss cyclone compatibility

PRESSURE. MOVEMENT. CONTROL.

Start with the feed.
Control the gap.

Material enters through the hopper into a wedge-shaped chamber. One jaw is fixed while the other moves, applying pressure to reduce the sample. Particles pass to the collector when small enough to move through the discharge gap.

Watch the jaw-crushing principle

RETSCH animation illustrates the principle using the BB 100.

Match the feed.

Check maximum dimensions, hardness, brittleness and the material’s breaking behavior.

Set the reduction.

Choose a model, jaw material and gap suited to the required result.

Validate the output.

Assess the size distribution, recovery, wear and throughput with representative material.

TYPICAL MATERIALS

Begin with the sample.

Discuss material properties, purity requirements and downstream analysis alongside the model specifications.

Ores & mineralsConstruction materialsGranite & quartzGlass & oxide ceramicsSlag & cement clinkerCoal & silicon

MODEL APPLICATION REVIEW

Put BB 50
to the material test.

Share the feed material, starting dimensions and target particle size. We’ll help review the jaw material, collection method, electrical configuration and practical next step.