Retsch SK 300 Manual
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Retsch SK 300 Manual

Cross beater mill
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Cross Beater Mill SK 300
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© Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany | 16.11.2020 Version 0003

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  • Page 1 Manual Cross Beater Mill SK 300 Translation © Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany | 16.11.2020 Version 0003...
  • Page 2 Copyright © Copyright by Retsch GmbH Retsch-Allee 1-5 42781 Haan Germany...

  • Page 3: Table Of Contents

    Table of Contents Notes on the manual ..........................6 Explanation of signs and symbols ..................... 6 Disclaimer ............................6 Copyright............................6 Safety ..............................7 Explanations of the Safety Instructions ..................... 8 General Safety Instructions ....................... 9 Repairs ............................. 10 Confirmation Form for the Managing Operator................11 Technical Data .............................
  • Page 4 7.2.2 Start Process ..........................38 7.2.3 Feeding Sample Material ......................39 7.2.4 Stop Process..........................39 Error Messages and Information Notes .................... 40 Error Messages ..........................40 Information Notes ..........................40 Return for Service and Maintenance ....................42 Cleaning, Wear and Maintenance ...................... 43 10.1 Cleaning ............................
  • Page 5 Notes on the manual...

  • Page 6: Notes On The Manual

    This manual does not contain any repair instructions. Please contact your supplier or contact Retsch GmbH directly if anything is unclear or you have questions about these guidelines or the device, or in the case of any faults or necessary repairs.

  • Page 7: Safety

    All those operating, cleaning or working with or on the device. This device is a modern, powerful product from Retsch GmbH and has been developed in line with the state-of-the art. The device is safe to use when operated correctly and when following the instructions in this manual.

  • Page 8: Explanations Of The Safety Instructions

    Safety 2.1 Explanations of the Safety Instructions The following warnings in this manual warn of possible risks and damage: DANGER D1.0000 Risk of fatal injuries Source of danger − Possible consequences if the danger is ignored. • Instructions and information on how to avoid the risk. Fatal or serious injuries may result if the “Danger”...

  • Page 9: General Safety Instructions

    − The conformity declared by Retsch GmbH with the European Directives will lose its validity. − Any warranty claims will be terminated. • Do not make any modification to the device. • Use spare parts and accessories that have been approved by Retsch GmbH exclusively.

  • Page 10: Repairs

    2.3 Repairs This manual does not contain any repair instructions. For safety reasons, repairs may only be carried out by Retsch GmbH or an authorised representative or by qualified service technicians. In case of repair, please inform… …the Retsch GmbH representative in your country, …your supplier, or...

  • Page 11: Confirmation Form For The Managing Operator

    Safety 2.4 Confirmation Form for the Managing Operator This manual contains essential instructions for operating and maintaining the device which must be strictly observed. It is essential that they be read by the user and by the qualified staff responsible for the device before the device is commissioned. This manual must be available and accessible at the place of use at all times.
  • Page 12 Safety...

  • Page 13: Technical Data

    Technical Data Technical Data 3.1 Protective Equipment − This device is equipped with a door lock. The locking mechanism prevents the device from being started when in an unsafe state. − The device can only be started when the door is closed. −...

  • Page 14: Electromagnetic Compatibility (Emc)

    Technical Data Example 2: Wood pellets (< 5 mm) Feed material: Bottom sieve: 0.5 mm Speed: 4 000 rpm At these operating conditions, the workplace related equivalent continuous sound level = 75.1 dB(A). 3.4 Electromagnetic Compatibility (EMC) − EMC class according to DIN EN 55011: B 3.5 Rated Power ~ 1 500 W (VA) 3.6 Motor Rotation Speed...

  • Page 15: Receptacle Volume

    Technical Data Location requirements: When used as table-top device, the device must be bolted to a vibration-free, plane, stable and free surface. When used as floor-standing device (mounted on the optional base frame), the device must be placed on a level base and secured against rolling away. 3.9 Receptacle Volume The receptacle volume (feed volume) depends on the sample material and the collecting receptacle used.

  • Page 16: Packaging, Transport And Installation

    N5.0014 Complaints Incomplete delivery or transport damage − The forwarding agent and Retsch GmbH must be notified immediately in the event of transport damage. It is otherwise possible that subsequent complaints will not be recognised. • Please check the delivery on receipt of the device for its completeness and intactness.

  • Page 17: Temperature Fluctuations And Condensation

    CAUTION The weight of the SK 300 without collecting receptacle and base frame amounts approx. 50 kg. The device may only be lifted or transported by at least two people. The SK 300 has a transportation lug (A) at which the device can be lifted and transported by means of hoists.

  • Page 18: Electrical Connection

    Packaging, Transport and Installation NOTICE N7.0021 Ambient temperature Temperatures outside the permitted range − Electronic and mechanical components may be damaged. − The performance data alter to an unknown extent. • Do not exceed or fall below the permitted temperature range (5 °C to 40 °C ambient temperature) of the device.

  • Page 19: Type Plate Description

    Packaging, Transport and Installation 4.6 Type Plate Description Fig. 2: Type plate 1 Device designation 2 Year of production 3 Part number 4 Serial number 5 Manufacturer’s address 6 CE marking 7 Disposal label 8 Bar code 9 Power version 10 Mains frequency 11 Capacity 12 Amperage...

  • Page 20: First Commissioning

    First Commissioning First Commissioning WARNING W3.0002 Danger to life through electric shock Damaged power cable − Operating the device with a damaged power cable or plug can lead to life- threatening injuries caused by an electric shock. • Before operating the device, check the power cable and plug for damage.

  • Page 21: Setting Up As Table-Top Device

     Loosen the four hexagon socket head screws (SC) to remove the transport profiles (TP) from the SK 300.  Position the SK 300 on the designated table as close as possible to the front edge of the table. Make sure that the discharge flange (AF) for the sample receptacle does not touch the edge of the table.

  • Page 22: Setting Up On Base Frame

    Fig. 4: Table mounting  Bolt the SK 300 to the tabletop by means of four M8 screws of the required length (not supplied). Use the second (LP2) and fourth pair of holes (LP4) of the U-profiles for this purpose.
  • Page 23 First Commissioning − cross bar (UG2) − left roller rail (UG3) − right roller rail (UG4) UG4.1 UG3.1 UG2.1 Fig. 6: Assembly of the cross bar  Remove the two front covers (UG3.1) and (UG4.1) from the left and right roller rails (UG3) and (UG4).
  • Page 24 First Commissioning  Tighten the hexagon socket head screws (WK2) firmly to the left and right brackets (WK1). NOTICE Ensure that the cross bar (UG2) lies flush against the two pre-assembled brackets (WK1). Fig. 8: Screwing tight the cross bar ...
  • Page 25 Screwing tight the base  Place the SK 300 on the base frame.  Use the four supplied M8x35 hexagon socket head screws (UG1.2), including the lock nuts and washers, to screw the U-profiles of the SK 300 tight on the base (UG1).
  • Page 26 First Commissioning UG1.2 Fig. 12: Mounting the SK 300...

  • Page 27: Operating The Device

    • Take note of the safety data sheets for the sample material. This Cross Beater Mill of the Retsch GmbH is a laboratory device. It is used for the batch-wise or continuous coarse and fine grinding of dry, medium-hard and brittle materials such as soils, gypsum, glass, granite, coal, coke, minerals, oxide ceramics, chamotte, slag, gravel, cement clinker and many other substances.

  • Page 28: Principle Of Operation

    Operating the Device Thereby, the grinding material is hardly heated, so that the SK 300 is also suitable for temperature-sensitive materials. Depending on the mesh size of the bottom sieve and the fracture properties of the grinding material, the achievable final fineness can be < 100 µm.

  • Page 29: Views Of The Device

    Operating the Device 6.3 Views of the device 6.3.1 Front Fig. 13: Front view of the device...

  • Page 30: Back

    Operating the Device Element Description Function Transportation lug Attachment point for hoist Operating controls Operation of the device Rotor Crushes the sample material Grinding insert with bottom sieve Grinds and sieves the grinding material Locking pin Holds the grinding chamber cartridge in position Feed hopper Takes the sample material...

  • Page 31: Switching On / Off

    240 V) 6.4 Switching On / Off  Turn on the SK 300 with the mains switch (I) on the back side of the device. When the device is switched off, it is completely disconnected from the mains. 6.5 Opening and Closing of the Device The SK 300 has a locking mechanism (K) that locks the door mechanically.

  • Page 32: Opening

    Operating the Device 6.5.1 Opening Fig. 15: Opening the device  Connect the device to the mains.  Switch the device on by means of the mains switch (I).  Pull and hold the catch mechanism (J) forwards.  Turn the locking lever (H) forwards. The locking mechanism (K) is released and the door can now be opened.

  • Page 33: Inserting The Grinding Set

    Operating the Device 6.6 Inserting the Grinding Set CAUTION C10.0085 Cutting injuries Sharp cutting edges − The sharp cutting edges on the rotors and/or the cutting bars in the grinding chamber can lead to hand lacerations. • Grasp the rotor only on the hub and do not touch the cutting edges or bars.

  • Page 34: Inserting The Grinding Insert

    Operating the Device 6.6.1 Inserting the Grinding Insert Fig. 17: Inserting the grinding insert  Pull up and hold the locking pin (E).  Align the grinding insert so that the opening (ME1) for the locking pin is at the top, and the three recesses (ME2) are aligned with the corresponding cylinder pins.

  • Page 35: Inserting The Bottom Sieve

     Slide the bottom sieve (BS) into the grinding insert (ME) up to the stop. NOTICE If the door of the SK 300 cannot be closed, check the correct alignment of the bottom sieve, and make sure that the bottom sieve has been completely pushed in.
  • Page 36 Operating the Device NOTICE If the collecting receptacle is installed without the filter hose or ring filter, it is to be expected that dust will be emitted out of the feed hopper (F). Therefore, never operate the SK 300 without the filter hose or ring filter! Fig.
  • Page 37 Operating the Device Fig. 22: Clamping the collecting receptacle CAUTION C11.0032 Danger of crushing Clamping the clamping levers − If the clamping levers are completely enclosed by the hand, the fingers can be pinched. • Do not clasp the clamping levers completely with the fingers during clamping.

  • Page 38: Controlling The Device

    Controlling the Device Controlling the Device 7.1 Operating Controls, Displays and Functions Fig. 23: Operating controls and functions Element Description Function STOP button Stops the grinding process START button Starts the grinding process Status LED STOP Lights up when STOP is pressed Status LED START Lights up when START is pressed Rotation speed setting...

  • Page 39: Feeding Sample Material

    (M). The collecting receptacle must be emptied as soon as the filling level reaches 90 % of its volume.  For the batch-wise or continuous operation, the SK 300 can be retrofitted with a 30 l collecting receptacle and the...

  • Page 40: Error Messages And Information Notes

    Error Messages and Information Notes Error Messages and Information Notes 8.1 Error Messages Error messages inform the user about detected device or programme errors. In the event of an error message, a fault has occurred, in which the operation of the device or the programme is automatically interrupted.
  • Page 41 Error Messages and Information Notes...

  • Page 42: Return For Service And Maintenance

     When returning a device, attach the return form to the outside of the packaging. In order to eliminate any health risk to the service technicians, Retsch GmbH reserves the right to refuse the acceptance and to return the respective delivery at the expense of the sender.

  • Page 43: Cleaning, Wear And Maintenance

    Improper repairs − Unauthorised and improper repairs can cause injuries. • Repairs to the device may only be carried out by the Retsch GmbH , an authorised representative or by qualified service technicians. • Do not carry out any unauthorised or improper repairs to the device! 10.1 Cleaning...

  • Page 44: Cleaning The Grinding Set

    Drying ovens of various sizes can be used for drying bottom sieves. Additional information concerning ultrasonic cleaning-baths and drying ovens can be found on the Retsch GmbH homepage (https://www.retsch.com). Cleaning the rotor: The rotor (RO) can be cleaned with alcohol, petrol or normal household detergent.

  • Page 45: Cleaning The Feed Hopper

    Cleaning, Wear and Maintenance 10.1.2 Cleaning the Feed Hopper Fig. 25: Cleaning the feed hopper  Unscrew the three M4 oval-head screws (G1).  Pull the splashback protection (G) slightly backwards, then remove it upwards.  Clean the feed hopper (F) and the splashback protection (G) with alcohol, petrol or normal household detergent.

  • Page 46: Replacing The Felt Ring

    Cleaning, Wear and Maintenance 10.2.1 Replacing the Felt Ring The felt ring (ME3) is located on the backside of the grinding insert (ME). In order to replace it when worn, the grinding insert must be removed from the grinding chamber. Fig.

  • Page 47: Maintenance

    11 Maintenance The SK 300 is largely maintenance-free. With each cleaning, it is recommended to additionally lubricate the feather key (PF) on the motor shaft (MW) with a few drops of machine oil.

  • Page 48: Replacing The Fuses

    Maintenance 11.1.1 Replacing the Fuses WARNING W6.0014 Risk to life caused by an electric shock Exposed contacts − Replacing the fuses without pulling out the mains plug can lead to life threatening injuries caused by an electric shock on contact with the fuse holder or the live contacts on the fuse.

  • Page 49: Accessories

    Retsch GmbH homepage (https://www.retsch.com) under the heading "Downloads" of the device. Information on wear parts and small accessories can be found in the Retsch GmbH general catalogue also available on the homepage. In case of any questions concerning spare parts please contact the Retsch GmbH representative in your country, or Retsch GmbH directly.
  • Page 50  If not already done, replace the transportation lug (A) on the SK 300 with the supplied plastic screw (PS).  Loosen the two M5 oval-head screws at the housing of the SK 300 and use them to screw the angle plate (DR2) to the SK 300.

  • Page 51: Cyclone Separator

     Plug the power cable into the mains connection on the rear.  Set the operating mode selector switch (DR3) to "Standard". A control via "Extern" (external) is not possible in conjunction with the SK 300.  Turn on the vibratory feeder DR 100 via the rear mains switch (DR4).
  • Page 52 SK 300 and cyclone separator with 5 l collecting receptacle (left) and 30 l collecting receptacle (right) When grinding light sample material, the SK 300 can be operated with a cyclone separator, so that even light feed material or small quantities can be easily processed.
  • Page 53 Fig. 37: Installing the cyclone adapter  Fasten the cyclone adapter (ZY3) to the housing of the SK 300 with the four supplied M6x20 hexagon socket head screws (ZY4).  Make sure that the sealing gasket (ZY5) rests correctly on the cyclone adapter.
  • Page 54 Accessories 30 l ZY9.1 ZY9.2 Fig. 38: Assembly of the cyclone funnel for the 5 l collecting receptacle (left) and the 30 l collecting receptacle (right)  Depending on the type of the cyclone separator, either screw the cover (ZY9.1) of the 5 l collecting receptacle together with the sealing gasket (ZY8) into the socket of the cyclone funnel (ZY7), or, in case of the 30 l collecting receptacle, screw the filter hose (ZY9.2) together with the sealing gasket (ZY8) into the socket of the cyclone funnel (ZY7).
  • Page 55 Accessories ZY11 ZY10 ZY10 Fig. 39: Placing the coupling (left) and mounting the cyclone funnel (right)  Slide the coupling (ZY10) completely over the tube of the cyclone funnel.  Mount the assembled cyclone funnel into the mounting bracket (ZY1) and align it to the cyclone adapter (ZY3).
  • Page 56 Accessories ZY13 Fig. 41: Connecting the industrial vacuum cleaner  Insert the connection of the industrial vacuum cleaner (ZY13) into the upper opening of the cyclone funnel.  Always switch on the industrial vacuum cleaner first, before starting the grinding process. CAUTION Read the manual of the industrial vacuum cleaner before commissioning.

  • Page 57: Disposal

    Disposal 13 Disposal In the case of a disposal, the respective statutory requirements must be observed. In the following, information on the disposal of electrical and electronic devices in the European Community are given. Within the European Community the disposal of electrically operated devices is regulated by national provisions that are based on the EU Directive 2012/19/EU on Waste Electrical and Electronic Equipment (WEEE).

  • Page 58: Index

    14 Index Accessories ............49 Electrical connection .......... 18 Accessory Electromagnetic compatibility ......14 base frame ............22 EMC ..............14 Adjustment sheet ..........46 Emissions ............13 Ambient temperature ........17, 18 Equivalent continuous sound level ....13, 14 Amendment status ..........
  • Page 59 Hearing damage ..........13 Range of application of the device ..... 28 Height..............14 Rated power ............14 Humidity .............. 18 Receptacle volume ..........15 Repair ............ 10, 42, 43 Repair instructions ..........10 Information note Required floor space .......... 14 H10 ..............
  • Page 60 Wear............33, 43, 45 Wear parts ............49 Vibrations ............20 Weight ............14, 17 Vibratory feeder DR 100 ........49 Width ..............14 Views of the device ..........29 base ..............14 Voltage ..............18 with open door ..........14 Working space ...........
  • Page 62 Copyright © Copyright by Retsch GmbH Retsch-Allee 1-5 42781 Haan Germany...

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