GENERAL INFORMATION.


Safety instructions for the handling of grinding and polishing tools

It is most important for your personal safety to wear gauntlets, eye protection, and probably a safety helmet.
Below, please find our safety recommendation downloads for grinding and polishing tools.

Download: Safety recommendations for grinding tools

Download: Safety recommendations for abrasive belts


 

Grinding fleece tools 15-25 m/s

Grinding
Common metal 30-40 m/s
Stainless steel 20-30 m/s
Hard metals 10-15 m/s
Thermo plastics 8-15 m/s
Duro plastics 10-25 m/s
Acryl glass 3-8 m/s
Polishing
Steel 30-35 m/s
Non-ferrous metals 30-50 m/s
Light metals 40-45 m/s
Thermo plastics 5-15 m/s
Duro plastics 25-30 m/s
Polyester coatings 15-30 m/s

 

Step rate depending on rotational speed and diameter

100 125 150 200 250 300 350 400 450 500 mm ∅
700 U/min 4 5 5 8 9 11 13 15 17 19 m/sec
850 U/min 4 6 6 9 11 13 15 18 20 22 m/sec
950 U/min 5 6 7 10 12 14 16 19 22 25 m/sec
1200 U/min 6 8 10 12 16 19 22 25 28 31 m/sec
1400 U/min 7 9 11 15 18 22 26 29 33 36 m/sec
1600 U/min 8 11 13 17 21 25 29 33 34 42 m/sec
1800 U/min 9 12 14 19 24 28 33 37 42 47 m/sec
2000 U/min 10 13 15 21 26 31 37 42 47 52 m/sec
2200 U/min 12 14 17 23 29 34 40 46 52 57 m/sec
2600 U/min 14 17 20 27 34 40 47 54 61 68 m/sec
2800 U/min 15 18 22 29 37 44 51 58 65 73 m/sec
3000 U/min 16 20 24 31 40 47 55 63 70 78 m/sec
3200 U/min 17 21 25 33 42 50 58 67 75 83 m/sec

Impregnations

In order to achieve longer tool life and improved aggressive effect, sisal rings, fibre brushes, grinding fleece tools, and cotton polishing rings are available with different types of impregnation.

Sisal Impregnations

I 03 soft to highly elastic
modifies hardness of the sisal fibre only slightly, but shows longer tool life and aggressive effect
I 3 see under I 03, but slightly more adhesive and firmer
I 53 see under I 03, but slightly drier and firmer
I 04 medium firm, very dry
I 05 firmness is the same as under I 04, but not that dry
I 06 firm, most suitable when high firmness and aggressive effect is required for sisal cord brushes and sisal calico rings
I 07 firmness is the same as under I 06, but it is slightly drier
I 09 extra hard and firm, for extreme use and aggressive effect
I 40 slightly adhesive, especially for fibre, sisal cord, and sisal calico rings, improves the effect of fibres and cord rings
I 50 brown, oily, for fibres, sisal cords, and sisal cloth
I 90 developed especially for fibre impregnation, good paste adhesion

Impregnations for cotton polishing rings

I 80 especially for cotton polishing rings, dry, strongly stiffening
I 90 see under I 80, but extra hard, improves aggressive effect and tool life

Grinding fleece impregnation

I 1 soft to medium
I 2 medium to hard

Abrasive cloth impregnation

Due to impregnation of the flap wheels (abrasive cloth) tool life is improved while the amount of dust is reduced. Preferred applied for machines.

I 4 soft to medium, especially for flap wheels

Grinding fleece products

The basic material for manufacturing grinding fleece, consists of three elements

  • synthetic fibre fleece
  • resin
  • abrasive grain

Synthetic fibres and abrasive grains are bonded with resin, so that there is produced a tight, open, flexible, lasting and largely chemical random laid non-woven fabric. Grinding fleece is a three-dimensional grinding tool. Three-dimensional means equal distribution of the mineral within the whole fleece which guarantees consistent results during the complete tool life.


 


Advantages of grinding fleece

  • the geometric form of the workpiece remains unchanged
  • increases corrosion resistance of surfaces
  • increases the surface and thus allows perfect adhesion of subsequent coatings
  • no divergences in the surface appearance due to equal grain distribution (reproducible)
  • adjusts to the shape of the workpiece
  • dry and wet applicable with oil
  • minimal warming, therefore no discoloration of the workpiece
  • free profiles
  • no decreasing grinding effect
  • working at a low noise level

Fields of application

A-material

steel, stainless steel, non-ferrous metals

S-material

high alloy materials, plastics, wood, ceramics and glass, non-ferrous metals

With the same grain size and workpiece, S-grain – compared to A-grain – produces a finer and more compact grinding pattern with low roughness.


Materials and degrees of fineness (grain size)

A-material = aluminium oxide – red mineral colour

A002 = extra coarse grain 80
A004 = coarse grain 100
A006 = fine grain 180
A007 = very fine 280

S-material = silicon carbide – grey mineral colour

S004 = coarse grain 100
S006 = fine grain 180
S007 = very fine grain
280 S008 = very fine grain 500
S009 = extra coarse grain 800