Stirrer Heads

The 4-blade propeller stirrers provide axial flow and create increasing shear forces at higher stirring speeds. Recommended for medium to high speed operations.

The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily.

Operating temperature: -200°C to +250°C

Additional sizes and accessories are available on request.
Information on the mixing effects of the different stirring geometries can be found in the descriptions of the stainless steel stirring rotors.
The semi-circular shape of the paddle is ideal for mixing in round-bottom flasks. The pivoting blade allows insertion into vessels with narrow necks and/or ground joints.

The dissolver stirrers create a radial flow with high turbulence. The mixture is drawn from top to bottom. High shear forces are created at the dissolver disk, which provides effective particle reduction. Recommended for medium to high speed operations.

With R 270 bosshead.

Powerful Stirring

Shaft diameter: 8mm

Blade and Half-Moon Impeller

• These impellers are recommended for applications which require an average speed
• For mixing products with average viscosity
• Models BR 12, BR 14 and HR 18 come with collapsible blade for narrow neck vessels

• These impellers are recommended for applications which require an average or high speed
• For mixing products with medium or high viscosity
• Excellent mixing properties for homogenisation and suspensions
• These models create an axial flow

• These impellers are recommended for applications which require an average speed
• For mixing products with average viscosity up to <500mPas
• Ideal for gassing of liquids
• These impellers create a radial flow

• These impellers are recommended for applications which require a low speed
• For mixing products with medium or high viscosity

Stainless steel 1.4301. With screwthread fitting as outlined below.

Stable stands with H-shaped base. Stands have a levelling screw to compensate for unevenness on the laboratory bench. Max. load 10 kg.

Plate stands with slip resistant foil. Max. load 5 kg.

The 3-blade propellers produce axial flow, and reduce shear forces to a minimum, even at high stirring speeds, thanks to their optimised blade design. Recommended for medium to high speed operations.
Other sizes available on request.

Rigid, light and unbreakable. The ideal replacement for glass rods.

Useful extension to the existing range of Bola stirrer shafts. The additional blades can optionally be fixed in your preferred position on every stirrer shaft with diameter 8,10 or 16 mm (a flat spanner is included). The stirrer blades are entirely made of PTFE, the mounting devices are made of a special PTFE-compound. A high chemical and thermical (-200 to +250 °C) resistance is assured. This "building block system" allows the user to define a stirrer of their own special requirements.

The anchor-shape rotor creates a tangential flow and high shear forces between the vessel wall and stirring blades. This stirrer is especially suitable for medium to high viscosity fluids. Recommended for low speed operations.

The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily.

Operating temperature: -200°C to +250°C

Additional sizes and accessories are available on request.
Information on the mixing effects of the different stirring geometries can be found in the descriptions of the stainless steel stirring rotors.
Recommended for low speed operations.

The anchor stirrers create a tangential flow and high shear forces between the vessel wall and stirring blades. Especially suitable for medium to high viscosity fluids. Recommended for low speed operations.

The 4-blade diagonal blade stirring rotor provides axial flow and creates increasing shear forces at higher stirring speeds. Recommended for medium to high speed operations.
Other sizes available on request.

Generates a radial flow. For drawing the material to be mixed from the top and bottom. For aerating of low viscosity media and for homogenizing solids in liquids. Used at medium to high speeds.

This novel stirring system has been conceived to mix low viscosity fluids as well as highly viscous media at slow speeds. Its special design creates inherent dynamic currents to produce perfectly homogeneous mixing results in very little time. Additional components like baffles, bottom bearings, etc. are not needed.

Advantages at a glance:

• suitable for low to highly viscous fluids
• stirs media containing solids and fibres without any difficulty
• gentle, low-shear stirring, due to slow stirring speed
• constant product temperature, with no heating effect
• short mixing times as the entire contents of the container are agitated
• no air addition, no foaming
• no baffles required
• low gear wear due to balanced forces
• minimal power consumption thanks to low speeds and short operation times
• easy cleaning
• material no. 1.4404

• a single stirring zone, near to the container base, ensures easy mixing of settled residues, e.g. in flow-through mixing containers
• no baffles required, thus no additional sources of ignition

The folding blades of this 2-blade centrifugal stirring rotor open with increasing speed, allowing use with narrow-neck vessels. The stirring effect it provides is similar to a standard diagonal blade stirring rotor. Recommended for medium to high speed operations.

BSR series stirrers perform routine mixing tasks up to 200 l.

General specifications:

• operating pressure max. 6 bar
• air consumption 800 l/min. at 6 bar
• power output 640 W at 6 bar
• clockwise rotation
• ATEX rating to Ex II 2G Ex h IIC T5 Gb

• all-stainless steel housing
• continuously adjustable speed control valve
• spherical clamping device with support arm diam. 16 mm, length 200 mm
• floor stand with rod (height 1000 mm, width 600 mm) and bosshead
• plug-in connector DN 7.8
• silencer
• output shaft L 32 mm x diam. 14 mm

Connection couplings VK:
Fixed-diameter connection for motor/magnetic coupling drive shaft and stirring rod. Suitable for use in potentially explosive atmospheres. Material No. 1.4404.
Flexible glass stirring shaft couplings PK:
For stirring tasks using glass stirring rods. Elastic connector between motor and stirring shaft. Provides exact alignment of motor and shaft, and evens out axial and height differences. Accepts 6mm to 10mm diameter shafts.
Flexible glass stirring shaft couplings K:
For stirring tasks using glass stirring rods. Elastic connector between motor and stirring shaft. Provides exact alignment of motor and shaft, and evens out axial and height differences. Accepts 6mm to 10mm diameter shafts
Double-Cardan-Coupling DCK I:
With 8mm dia. hexagonal input drive receiver and 6mm square socket drive output.

Fixed-diameter connection between motor and stirring shaft. Suitable for use in potentially explosive atmospheres (ATEX). Material no. 1.4404

Needles ideal for picking single colonies. Flexible loops for easier collection and inoculation.

Proporties:

• Sterilised by irradiation
• Colour coding for volume differentiation
• Single and bulk packaging options

The dissolver stirring rotor creates a radial flow with high turbulence. The mixture is drawn from top to bottom. High shear forces are created at the dissolver disk, which provides effective particle reduction. Recommended for medium to high speed operations.

The worldwide patented VISCO JET^® Mixing System is the result of the so-called cone-principle. Turbulent flows are created at the taper end by acceleration, displacement and retardation. These flows advance through the stirred medium and result in the new dynamic mixing motion.

• One system for literally all mixing tasks for low to high viscosity media
• Patented cone-principle creates even at low speeds a turbulent flow which is unique to the VISCO JET^®
• Even with high-viscosity media and gels which naturally do not mix by using common impellers you will observe an immediate flow through the entire beaker
• This technology allows for de-gassing of gels while preventing air intake and foaming
• Reduce process times significantly while performing the best mixing result ever

Generates axial flow. For drawing the material to be mixed from above. For circulating and handling low to medium viscous liquids. Recommended for medium speed operations.

With PTFE-coated, stainless steel shaft.

Stainless steel. Supplied as separate 8mm diameter shaft with tapped screwthread end onto which can be attached a choice of paddle types. Lengths as indicated.

The paddle stirring rotor creates a tangential flow with minimum turbulence. Its design ensures a gentle action on sensitive products and good heat exchange. Recommended for low to medium speed operations.
Other sizes available on request.

For use with 9.950 401 and 9.950 402 shafts.

Stainless steel 1.4301. With screwthread shaft connection as outlined below.

PLR compressed air laboratory stirrers are designed for all kinds of standard mixing tasks. The vane type, air-driven motor offers a high power density and is significantly lighter and smaller than an equivalent electric motor.

General specifications:

• operating pressure max. 6 bar
• air consumption 260 L/min. at 6 bar
• power output 200W at 6 bar
• clockwise rotation
• ATEX certification

• all-stainless steel housing
• continuously adjustable speed control valve
• support arm diam. 14 mm
• snap connection for NW 5
• output shaft L x diam. 26 x 10 mm

The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily.

Operating temperature: -200°C to +250°C

Additional sizes and accessories are available on request.
Information on the mixing effects of the different stirring geometries can be found in the descriptions of the stainless steel stirring rotors.
The blades are inclined at 45 °. Recommended for medium to high speed operations.

The SI400 consists of an end switch (normally closed contact / switch) and a magnetic switch contact (actuator) which is mounted either on the floor stand R472 with the fixing device SI472 or alternatively on the telescopic stand R474 with the fixing device SI474.
The stirring unit RW47 can only be switched on through the SI400, when the agitator is adjusted to the user-selected height within the mixing vessel.
The power supply to the RW47 automatically shuts off if the stirring unit is lifted above the selected height.

Generates axial flow. Medium is conveyed from the bottom upwards. For homogeneous mixing and heat exchange of medium to high viscosity media. Recommended for medium speed operations.

Floor stand BS 1 with angled foot, plastic-coated, stand rod Ø 34 x 1000 mm
Floor stand BS 2 with angled foot, plastic-coated, stand rod Ø 34 x 1500 mm
Floor stand BS 3 with angled foot 600 mm, completely made of stainless steel, stand rod Ø 34 x 1000 mm

Wall bracket WS
Rod diam. 34 x 1000 mm, clearance from wall: 200 mm.

The 3-blade turbine stirring rotor produces axial flow; the guide ring surrounding the blades reduces shear forces, and offers protection when contacting the wall or bottom of the vessel. Recommended for medium to high speed operations.

These attachments are by far the safest, fastest and most efficient method for heating and mixing solutions in round-bottom flasks from 10 ml to 5L. Heat-On fits precisely to every flask, thus insuring maximum surface contact and fast heat transfer. This eliminates the need for oil as a heat conductor.

• This unique design prevents glass breakage and protects from spilled chemicals or solvents
• The high temperature range provides unlimited safety for applications up to 260°C
• A unique PTFE coating on the aluminum Heat-On body allows for superior chemical resistance and many years of service life
• 150 ml of water boils in less than 11 minutes

Powerful and highly flexible container stirrers designed to be used across industries; compact and lightweight construction, easily detachable.

General specifications:

• operating pressure max. 6 bar
• air consumption 23 L/sec. at 6 bar
• clockwise rotation
• ATEX certification

• motor drive PM 120 made of stainless steel
• continuously adjustable speed control valve
• traverse support made of stainless steel
• stirring system type SW 2 diam. 400 mm with residue paddle
• connection coupling
• silencer
• clip plug

Resin-free and non-corrosive oil for lubrication of compressed air stirrers.

For manual lubrication of compressed air coming into the motor.

Fine speed controller.

PTFE-jacketed stainless steel shaft, paddle completely made of PTFE with two 45° angled blades. Universal chemical resistance since the product is only exposed to PTFE. Temperature resistance: from -200 to +250 °C. The product is sucked bottom-up, very good axial flow with low shear force.

The soil sampler made from iron consists of 3 parts: a handle with rod, optional extensions and the hardened drill bits. For determining soil properties, moisture
and structure. Extension rods can extend the working depth of the Mole down to 5 m. Individually customisable.

Drill bits for different soil properties:
Clay and damp soil: With narrow side panels for minimum soil friction/resistance. The soil adheres to the bit very well
Sand: With broad side panels and therefore a large retention capacity for the sand
Coarse sand: With extra broad side panels for sampling sandy soils and very dry soils
Combination: Retains both strongly cohesive and less cohesive soils
Riverside: Very suitable for drilling in hard, encrusted soils and soils mixed with fine gravel. The drill cutters project from the drill itself, so that friction is greatly reduced
Gravel drill: With slightly rounded, oblique scoops. Any stones present are clamped between the drill sides.
Stone catcher: The stone catcher is used to collect and remove stones that prevent proper sampling