SL 20

Selectra slicing machine - SL 20

SL 20

SL 20, Selectra slicing machine

SL 20 offen

SL 20, Selectra slicing machine, open

Line SL 20

When the EC 130 clipping unit is combined with the SL 20 or SL 25 slicing machine, a bagging table and an inclined conveyor belt, you receive a proven, semi-automatic and complete solution for slicing and packaging bread.


Optional: Drip lubrication


Blade guide with defined slice thickness


Outfeed: speed is continuously adjustable and thus can be synchronised with the packaging machine.

SL 20
SL 20 offen
Line SL 20
Standard specification

Welded machine frame, lacquered in stainless steel design colour, standard
Hinged door at the outfeed side
Panels, doors and electrical cabinet or switchbox made from stainless steel
Hasp locking for cover panels
Protection hoods made of polycarbonate
Slides and/or funnels for bread crumbs
Footrests without dowel holes
Band-blade drive 3 kW
Conveyor system with adjustable speed
Product infeed with lateral guides, manually adjustable
Slicer - Bottom infeed: Plastic slat conveyor belt
Slicer -Upper infeed by belt
Top belt height manually adjustable by handwheel
Slicing compartment with additional sensors with mechanical safety locking for openings
Equipment stops in case of blade break
Blade tensioning device with automatic spring-tension regulation
Blade guides with hardened round fingers for one constant slice thickness
Hand slider (POM with stainless steel handle)
Set of band blades 18x
Spare set of band blades 18x
Lower drum, standard
Crumb scraper, permanent, installed at both drums
Plate at the infeed side of the slicer Outfeed
Slicer-Outfeed equipped with chain conveyor with pusher bars, base plate made from structured stainless steel.
Product outfeed with lateral guides, manually adjustable
Switch cabinet with hasp locking
Switch cabinet with fan+filter system - standard-
Operating elements located in the machine panel or door of the switch box
Contactor control system with switches
Frequency converter Hitachi
Electric execution according to CE-specification
Operating language and labels in German language
Operating manual in German language
Spare parts catalogue in German language

Welded machine frame, stainless steel, standard (supporting tube for drums made of galvanised steel)
Protection hoods made of perforated stainless steel panels
Band-blade drive 4 kW
Band-blade drive 5,5 kW
3 Sensors to detect twisted products - installed above the transport system
Additional set of blade guides with hardened round fingers for one constant slice thickness
Storage Trolley - Space for up to 5 additional sets of blade guides
Oiling system near to the lower drum (drip system), up to 40% rye content
Blade sterilization by 2 UV-light radiators (Brand SterilAir, ET2230-4NA, Dose approx. 22-33 mW/cm²)
Refuse of endpieces / heels. Adjustable plate in front of the slicer Outfeed
Clean room stage 3/4/5: Crumb suction at the outfeed, guide plates and collecting funnel inside the slicer for crumbs and endpieces. Vibrating slide with channel for bread crumbs installed in the upper slicing housing. Pipeworks up to the central connection point for connection to local suction system
Additional signal lamp
Switch cabinet with air-conditioning
RFID - Panel access authorization per chip, 10 pieces with up to 5 authorization levels
RFID - Additional chip, 10 pcs. with up to 5 authorization levels
Frequency converter Allen Bradley
Voltage modulation, 3-phase
Electric execution according to UL-specification
Customer-specific special machine modifications
Customer-specific operating language and labels
Customer-specific operation manually
Layout SL 20
SL20 Linie
Layout SL 20
SL20 Linie

Can the machine be cleaned wet?

The machines are designed according to protection class IP54. Wet cleaning of the machines inside the cutting and packaging room is not recommended as moisture and bread crumbs directly cause the formation of mold spores.

Wet cleaning should therefore only take place outside the cutting and packaging room: components of the machine, such as guide plates, can be dismantled and cleaned at an external washing area. After drying and disinfection, the hygienically flawless dry components can be inserted into the device and reused.

Change kits allow cleaning and preparation in addition to the production operation.

Are brochures in other languages available?

Further brochures in other languages ​​are available here. The technical state may not be updated!

Is it possible to combine a GHD Hartmann Schneider with other packaging machines?

Of course, our bread slicers can not only be combined with capping and packaging machines from GHD Hartmann, but also with machines from other manufacturers.

Take advantage of our many years of experience for optimum coordination and connection.

How loud is a machine by GHD Hartmann?

The noise emission initially depends on the type of machine. Packaging machines, cutters or systems for grouping are fundamentally different due to the different functions.

Another factor is the nature of the products, which can behave differently during processing and transportation. A machine may be very quiet at idle, but produces varying amounts of noise during processing, depending on the products.

The type of cover also has a great influence on the noise emission: Polycarbonate viewing covers significantly reduce the noise level, while perforated grids can not significantly reduce noise emissions.

As a rule, the maximum noise emission of the machines is not more than 78 dB (A).

Which controls can GHD Hartmann Maschinenbau offer?

In addition to contactor controls for simple devices, GHD Hartmann Maschinenbau offers systems from the manufacturer Omron as a standard controller for more complex tasks.

Siemens or Allen Bradley are available as options.

What is the difference between a fixed blade guide and an adjustable blade guide?

Adjustable blade guides:



  • Complicated access for cleaning
  • Complicated exchange of guiding pads
  • One position for wearing of pads
  • Correct cleaning would require the dismantling of the both adjustable guides. This requires hours
  • Not according to sanitary demands (local laws and rules)
  • If used in combination with oil the unit might “stick together”


  • One system for every slice thickness (if within the adjustable range)
  • Tolerances within the length of loaves are divided to the slice thicknesses


Exchangeable blade guides



  • One set of blade guides per slice thickness required


  • Always correct adjustment of slice thickness
  • Fingers could be turned several times in case of wearing
  • Fingers could be easily exchanged in case of wearing
  • Jet-wash cleaning and drying outside the packaging area
  • Good access for cleaning
  • Good access for blade exchange
  • Better visibility of the slicing process

What compressed air quality is recommended for machine use in the food industry?

According to ISO 8573-1 with reference to VDMA standard sheet 15390-2, we specify a compressed air quality that we recommend when using the machines and devices.

How is the blade change performed on a belt cutter?

The slicer band blades are a wearing part of the band cutter. The service life of the slicer band blades varies depending on the type of bread. Usually a complete set of slicer band blades is always changed, as the slicer band blades stretch slightly during use and thus become "longer".

For the slicer band blades change you can disassemble the knife guide for easy accessibility quickly and easily. Depending on the experience, changing a knife set takes about 5-10 minutes

Toast_fallende Scheiben
Toast_5 Scheiben

SL 20

Fully automatic band slicing machine for toast and mixed rye bread. The slicing process is performed using band blades with a length of 150 inches (approx. 3.8 m). These are tensioned between two hard chrome-plated drums. The self-supporting, torsion-resistant tubular steel frame ensures smooth running of the machine. Generously dimensioned doors and hoods enable good cleaning and maintenance access along with rapid blade changing.

Technical specifications

Dimensions: Length: 2330 mm, Width: 1050 mm, Height: 2380mm
Weight: 850 kg
Product dimensions: Length: 100 - 350 mm, Height: 50 - 150 mm
Capacity: up to 2500 products /h
Speed of the slicer: Soft start, 300 m / min
Band slicer length: 150 inch / approx. 3,8 m
Controller: Contractor control
Operating panel: Switches and buttons
Control voltage: 24 V, DC
Frequency controller: Hitachi
Pneumatic system: Festo
Power supply: 400 Volts / 50 cycles
Power consuption: approx. 4 kW
Compressed air: min. 6,0 bar (ISO 8573-1)
Operating side: left / right
Protection class: IP 54
Adjustment: manual