Geneq > Materials testing > Crushers

Jaw crusher
Model BB 51


Description
The BB 51 has been specially designed for sample preparation in the laboratory. The space-saving, dust-tight instrument fits on any laboratory bench. Small amounts of sample with large feed sizes are crushed gently and without loss. The Jaw Crusher BB 51 rests on four rubber feet and has a closed housing that provides for ultimate operator safety. The on-off switch and gap width setting (0 – approx. 10 mm) with digital display are conveniently located on the front panel. Reproducible results are ensured by the zero-point adjustment of the gap width. This means that any breaking jaw wear can be compensated by simply pressing a button. The feed hopper of the BB 51 can be easily dismantled for cleaning. Breaking jaws and wearing plates are available in five different materials to be selected depending on the sample and the analysis to be carried out. A version for heavy-metal-free size reduction is also available. The breaking jaws and wearing plates are easily exchanged. This means that the Jaw Crusher can be converted to suit different applications. The BB 51 is driven by a powerful single-phase AC motor with 1100 W. A disc spring package and thermal overload protection device protect the Jaw Crusher against overloading. Due to permanently lubricated bearings and its solid design, the BB 51 is virtually maintenance-free. Its compact size makes the BB 51 an ideal choice for use in mobile laboratories. Carrying handles for the Jaw Crusher are available on request.

Benefits at a glance
  • Compact, space-saving benchtop instrument
  • Excellent performance and high final fineness (d90 <0.5 mm)
  • Digital gap width display
  • Zero-point adjustment for wear compensation
  • Neutral-to-analysis size reduction thanks to breaking jaws made from 5 different materials
  • Safe and user-friendly
  • Escape-free hopper
  • Dust-tight, maintenance-free
  • Smooth and quiet operation
  • CE-conforming

Jaw Crusher technology
The Jaw Crushers are robust and powerful forced-feed crushers. The feed material passes through the no-rebound hopper and enters the crushing chamber. Size reduction takes place in the wedgeshaped area between the fixed crushing arm and one moved by an eccentric drive shaft. The elliptical motion crushes the sample which then falls under gravity. As soon as the sample is smaller than the discharge gap width, it falls into a removable collector. The continuous gap width setting with scale resp. digital display ensure optimal size reduction in accordance with the set gap width value.

Selection guide for Jaw Crushers
The choice of Jaw Crusher depends primarily on the feed material size and the amount to be crushed.
With its compact space-saving design, model BB 51 is often used in laboratories for pre-crushing small amounts of sample with a large feed size.
Series BB 100, BB 200 and BB 300 Jaw Crushers are mainly used for pre-crushing hard, brittle products with a degree of hardness >3 on the Mohs' scale.
BB 100 and BB 200 are particularly suitable for standard size reductions, e.g. of minerals, ores and fossil fuels.
Models BB 200 and BB 300 are also suitable for size reduction in process plant, e.g. when included in a sampling station.

Increased user convenience combined with maximum working safety
Safety is very important for Jaw Crushers. The interior of the feed hopper cannot be accessed by hands and the baffles prevent the sample material from rebounding. Integral Belleville spring washer packages and a thermal overload protection switch protect the Jaw Crushers against overloading. The hopper is hinged for easy cleaning (BB 100 to BB 300) or can be easily removed. The Jaw Crushers run very smoothly and quietly. Due to their solid design, Jaw Crushers are virtually maintenance-free.

The suitable material for your requirements
  • Selecting the breaking jaw material. Breaking jaws made from different materials are available for different applications:
  • Manganese steel
    is a material whose structure becomes compressed under pressure and becomes harder with time (cold hardening).
  • Stainless steel
    is recommended if the expected feed material is not too hard and could cause corrosion.
  • Tungsten carbide
    is the most abrasion-resistant and pure material. It provides an increased working life even with materials up to 7-8 on Mohs’ scale.
  • Zirconium oxide,
    partially yttrium-stabilized is used as a ceramic material for metal-free preparation, e.g. for dental or clinical ceramics, optical glasses. A further advantage is that no color changes as a result of abrasion are observed (only available for BB 51).
  • Heavy-metal-free steel
     is optimal for the sample preparation of materials which will be submitted for analysis on heavy metals and which are not too abrasive, such as construction waste, soil samples and road surfacing.
    Apart from giving guideline information about their analytical compositions, the table below provides an overview of which breaking jaw materials are available for which Jaw Crusher models.

Jaw Crushers order data
Jaw Crushers Item No.
Breaking jaws Version1 BB 51 BB 100 BB 200 BB 3002
Manganese steel 3/N~ 400 V, 50 Hz
230 V, 50 Hz 		-
20.056.0006		 20.052.0001
20.052.0003		 20.053.0001
20.053.0007		 20.054.1001
-
Stainless steel 3/N~ 400 V, 50 Hz
230 V, 50 Hz		 -
20.056.0002		 20.052.0004
20.052.0006		 20.053.0002
20.053.0008		 20.054.1003
-
Tungsten carbide 3/N~ 400 V, 50 Hz
230 V, 50 Hz		 -
20.056.0003		 20.052.0007
20.052.0009		 20.053.0003
20.053.0009		 20.054.1013
Zirconium oxide 230 V, 50 Hz 20.056.0004 - - -
For grinding without heavy-metal contamination
steel 1.1750 3/N~ 400 V, 50 Hz
230 V, 50 Hz		 -
20.056.0013		 20.052.0027
20.052.0028		 20.053.0018
20.053.0019		 20.054.1006
-
For grinding of semi-conductor materials (all parts coming into contact with the sample are heavy-metal-free)
Tungsten carbide 3~ 400 V, 50 Hz - - 20.059.0001 -
For integration into a system at the customer’s location, with manufacturer’s declaration according to EC machine directive, with three-phase motor (voltages on request) and central lubrication, without hopper and protective motor switch
Manganese steel on request - - 20.058.1001 20.057.1001
Stainless steel on request - - 20.058.1002 20.057.1002
Tungsten carbide on request - - 20.058.1003 -
1)other electrical versions available on request 2)please order receptacle separately 3)versions with wearing plates of tungsten carbide available
Spare breaking jaws and wearing plates Item No.
Spare breaking jaws, 1 pair BB 51 BB 100 BB 200 BB 300
Spare breaking jaws, manganese steel 22.048.0014 22.048.0001 22.048.0004 22.048.0007
Spare breaking jaws, stainless steel 22.048.0012 22.048.0002 22.048.0005 22.048.0008
Spare breaking jaws, tungsten carbide 22.048.0010 22.048.0003 22.048.0006 on request
Spare breaking jaws, zirconium oxide 22.048.0011 - - -
Spare breaking jaws, steel 1.1750 22.048.0016 22.048.0017 22.048.0018 22.048.0019
Spare wearing plates, 1 pair BB 51 BB 100 BB 200 BB 300
Spare wearing plates, stainless steel 22.711.0009 22.711.0002 22.711.0003 22.711.0004
Spare wearing plates, tungsten carbide 22.711.0008 22.711.0005 22.711.0010 on request
Spare wearing plates, zirconium oxide 22.711.0007 - - -
Spare wearing plates, steel St 1203 22.711.0011 22.711.0012 - 22.711.0013
Spare wearing plates, steel 1.0038 - - 22.711.0006 -