Large Cryogenic Grinding Mill – SPEX Freezer Mill® 6875 & 6875D

Specifically designed for grinding and pulverising tough and/or temperature sensitive samples immersed in liquid nitrogen. SPEX FreezerMills are capable of grinding almost anything.

  • The SPEX 6875 Freezer/Mill® is a large cryogenic grinding mill that accommodates sample sizes ranging from 0.1 – 100 grams
  • The 6875D provides double the capacity with dual grinding chambers, as well as dual pre-cooling chambers for increased throughput

Features

  • Auto-Fill System available for automated filling with liquid nitrogen (standard on 6875D)
  • Closed grinding vials eliminate sample cross-contamination, retain volatiles, control hazardous or critical samples, and simplify clean-up
  • Coil holds one Large Grinding Vial, one Mid-Size Vial, four Standard Grinding Vials, or four Microvial Sets
  • Equipped with liquid nitrogen level sensor and lid safety interlock for operator protection
  • Grinding Vial Sets offered in a variety of materials including polycarbonate, stainless steel, and Cr-free steel
  • Grinds samples in the 0.1 – 100 gram range (per chamber)
  • Large cryogenic impact grinder with self-contained liquid nitrogen tub and insulated case
  • Liquid nitrogen required for operation
  • Magnetically driven impactor is the only moving part so there are no mechanical linkages or bearings to fail
  • Programmable parameters include grinding time, impactor rate, pre-cooling and cooling times
  • Stores up to 20 user-defined grinding programs for quick and easy recall
  • Touch-screen control panel is detachable and can be used for remote operation
  • Run history can be uploaded to a USB memory stick
  • Training videos and manuals available on the touchscreen
  • 2 pre-cooling chambers and 2 grinding chambers increase throughput rates on the 6875D

Typical Samples

Typical samples that can be processed by the Freezer/Mill 6875/6875D include:

  • Plant & animal tissues
  • Seeds
  • Plastic and Polymers
  • Pharmaceuticals
  • Food products
  • Electronic components
  • Textiles and fibres
  • Hair
  • Teeth and bones

Vial Volumes

 MicroSmallMediumLarge
Maximum Capacity0.5mL4mL25mL50mL
Recommended Sample Capacity0.1-0.2mL1-2mL5-10mL10-20mL
Recommended Sample Capacity (approx)30-200mg1-4g40g10-40g

Specifications

Model68756875D
SPEX 6875D cryogenic millSPEX 6875D cryogenic mill
Sample Capacity0.1 - 100g0.1 - 200g (using 2 chambers)
Grinding Chambers12
Precooling Chambers02
Stored Grinding Programs2020
LN2 Auto FillOptionalStandard
Dimensions52cm x 55cm x 46cm51cm x 53cm x 65cm
Weight24kg35kg
Voltage240V/50Hz240V/50Hz
CE ApprovedYesYes

Applications

SPEX Freezer Mills are suited to a wide range of different samples, these include:

Life Science

  • DNA/RNA extraction
  • Yeast analysis
  • Pharmaceuticals
  • Drug testing
  • Cannabis research
  • Food testing
  • Animal tissue
  • Plant tissue
  • Human tissue (incl. hair, teeth, bones, etc.)

Materials Science

  • Plastics and polymers
  • Composite materials
  • Textiles
  • Electronics
  • RoHS/WEEE

Application Examples

PotatoSPEX Freezer Mill cryogenic grinder with arrow image
Beef LungSPEX Freezer Mill cryogenic grinder with arrow image
HairSPEX Freezer Mill cryogenic grinder with arrow imageHair after cryogenic milling in a Spex Freezer mill
Polyethylene Beadspolyethylene beads before cryogenic milling in a Spex Freezer millSPEX Freezer Mill cryogenic grinder with arrow imagepolyethylene after before cryogenic milling in a Spex Freezer mill
Plastic ToysPlastic toy before cryogenic milling in a Spex Freezer millSPEX Freezer Mill cryogenic grinder with arrow imagePlastic treat after cryogenic milling in a Spex Freezer mill
Dog TreatsDog treat before cryogenic milling in a Spex Freezer millSPEX Freezer Mill cryogenic grinder with arrow imageDog treat after cryogenic milling in a Spex Freezer mill

Spex Freezer Mill on CSI Miami

6808 Vial Extractor

6758 End Plug Extractor for Micro Vials

 MicroSmallMediumLarge
Part No.6757
Polycarbonate cylinder, stainless steel end plugs and impactor
6751
Polycarbonate cylinder, stainless steel end plugs and impactor
6881
Polycarbonate cylinder, stainless steel end plugs and impactor
6801
Polycarbonate cylinder, stainless steel end plugs and impactor
Maximum Capacity0.5mL4.0mL25mL50mL
Recommended Capacity0.1-.02mL1-2mL5-10mL10-20mL
Recommended Capacity30-200mg1-4g5-40g10-40g
Diameter (Length 137mm including end caps)9.5mm22mm38.5mm57mm
Freezer Mill 6770/67751 Set (3 total)1NANA
Freezer Mill 6870/68754 Sets (12 total)411
Freezer Mill 6870D/6875D8 Sets (24 total)822
Freezer Mill 69708 Sets (24 total)822
Note: Capacities are a guide and will depend on density.
SPEX 6875D cryogenic mill
SPEX Freezer Mill Vials

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