Gesswein Abrasive Stones

Gesswein Abrasive Stones are designed to be used directly after machining, or spark eroding, in the preparation of surfaces for final polishing. All stones are manufactured to high standards from a liquid mix of the abrasive and the bonding agent, which is then fired in a thermostatically controlled kiln to ensure uniform distribution of the abrasive particles in each stone.

The stones are cut after firing and ground to size when cold, this process yields consistent quality and performance. Care should be taken in use and storage to prevent contamination from one grit, or type, to another. It is recommended that Kemet Stoning Oil is used as a lubricant with the stones.

Gesswein Abrasive Stones

Use the chart below to determine which finishing stone is right for you based upon the type of surface or contact us to ask our technical staff to choose the best stone for your application.

u = Most commonly used for each application.

Surface Type Diemaker EDM EDM Blue Oil Treated Premium White RA GP Mould-maker Mould-maker Plus Super Fine Ultra Soft Rough Out
All Tool Steels    
Heat Treated Tool Steel         u            
EDM Surface   u            
Machined Surface     u            
Stainless Steel           u        
Aluminum               u
Non-Ferrous               u
High Polishing                   u  
Rough Grinding                       u

Gesswein Diemaker

(Beige/light brown) This range of stones has established itself as one of the most popular in use today. Fast cutting with moderate breakdown, the DF can be used on both hard and soft steels, and is also suitable for some non-ferrous materials. Able to be used by hand or in profiling machines.

  • Medium-hard aluminium oxide stones combine the characteristics of fast cutting and moderate breakdown.
  • Ideal for general purpose stoning on hard and soft tool steels such as H-13, P-21, SS420 and pre-finishing.
Size (mm) Grit 150 220 320 400 600 800 900 1200
6 x 1.6 x 100 - 311236 311276 311234 311275 - 311245 311055
13 x 1.6 x 150 311260 311232 311237 311209 311279 - 311280 311056
6 x 3 x 150 311262 311253 311238 311242 311251 311057 311254 311058
13 x 3 x 150 311229 311202 311206 311211 311215 311059 311267 311080
25 x 3 x 150 - - 311289 311290 311291 - - -
13 x 6 x 150 311230 311203 311207 311212 311216 311081 311255 311082
19 x 6 x 150 311270 - 311274 311272 311252 - 311266 -
25 x 6 x 150 311083 311084 311241 311287 311288 - - -
25 x 13 x 150 311249 311235 311240 311250 311281 - 311282 -
4 x 4 x 100 311422 311401 311403 311408 311409 311421 311419 311420
6 x 6 x 150 311228 311201 311205 311210 311214 311085 311243 311086
9.5 x 9.5 x 150 311259 311204 311208 311213 311217 311087 311244 311088
13 x 13 x 150 311231 311257 311256 311273 311233 311089 311278 311090
25 x 25 x 150 311277 311258 311239 311263 311283 - - -
6 x 6 x 6 x 150 311284 311285 311286 312041   - - -
9.5 x 9.5 x 9.5 x 150 312022 311271 312031 312023   - - -
Ø 6 x 150 311246 311218 311221 311224 311261 - 311268 -
Ø 13 x 150 311264 311219 311222 311269 311226 - - -
25 x 13 x 150 311091 311092 311093 311094 311095 311096 311097 311098
gesswein DF stones

Gesswein EDM Orange

(Orange) stones are designed to remove the tough hard scale left by ElectroDischarge Machining. These stones contain extra sharp particles of Aluminium Oxide, together with a small amount of Chromium Oxide, within a special bond, which enables them to follow contours. May be used by hand, or in a profiler.

  • Remove the tough, hard scale left by the EDM process much faster than any of our other finishing stones.
  • Contains extra-sharp premium-grade aluminium oxide for fast cutting action.
  • Special clay bond enables the EDM stones to hold their shape well for working small details and sharp corners.
  • Breaks down slowly, cuts fast and resists loading.
Size (mm) Grit 120 180 220 320 400 600
6 x 1.6 x 100 - 311798 311794 311731 311736 311740
13 x 1.6 x 150 311720 311722 311724 311730 311785 311786
6 x 3 x 150 311702 311707 311725 311714 311733 311793
13 x 3 x 150 311704 311709 311727 311716 311734 311795
13 x 6 x 150 311705 311710 311728 311718 311735 311739
25 x 13 x 150 311024 311025 311026 311027 - -
4 x 4 x 100 311701 311712 311796 311713 311732 311737
6 x 6 x 150 311703 311708 311726 311715 311787 311738
9.5 x 9.5 x 150 311706 311711 311789 311719 - -
13 x 13 x 150 311048 311049 311950 311035 311028 311029
25 x 25 x 150 311721 311723 311729 311717 - -
6 x 6 x 6 x 150 312024 312066 312028 311781 311784 311797
9.5 x 9.5 x 9.5 x 150 312025 311788 312029 - - -
Ø 6 x 150 311779 311780 311799 311781 311784 311797
Hybrid 6 x 6 x 150 311042 311043 311044 311045 311046 311047
Gesswein EDM

Gesswein EDM Blue

(Blue) stones are a natural development from the extremely popular EDM (orange) stones. Due to the inclusion of a small amount of cobalt, they are harder than EDM, maintaining their strength even in small section sizes, with good resistance to loading. Excellent for use in profiling or ultrasonic machines. EDM Blue stones break down slowly and cut fast. Very good for detailed work.

  • Harder than our regular EDM Stones and designed to remove the tough, hard scale left by the EDM process.
  • Breaks down slowly and cuts fast. Maintains shape, saving you time.
  • Contains extra-sharp premium-grade aluminium oxide for fast cutting action plus a small amount of cobalt blue for added hardness.
  • Resists breakage and specifically designed for use in reciprocating profilers.
Size (mm) Grit 120 180 220 320 400 600
13 x 1.6 x 150 311742 311747 311753 311760 311766 311772
6 x 3 x 150 311743 311748 311754 311761 311767 311773
13 x 3 x 150 311745 311750 311756 311763 311769 311775
13 x 6 x 150 311746 311751 311757 311764 311770 311776
4 x 4 x 100 311741 311752 311758 311759 311765 311771
6 x 6 x 150 311744 311749 311755 311762 311768 311774
Ø 6 x 150 311777 311778 - 311782 - -
gesswein edm stones

Gesswein Oil Treated

These stones have been increasing in popularity over recent years. Able to be used on hard or soft mould and die steels, OT stones are made from white premium grade Aluminium Oxide, in a medium/hard bond, which is soaked in oil during the manufacturing process. This enables the stones to be used, if required, without lubrication. OT stones maintain good shape during use, and are excellent for processing machined or even EDM surfaces. Good for use in profiling machines.

  • Excellent for machined surfaces.
  • Fine cutting ability.
  • Medium-hard stone with white aluminium oxide soaked with oil.
  • Can be used without additional lubrication.
  • Holds shape well for finishing mould details. Moderate breakdown.
  • Often used for EDM removal. Special oil treatment prevents loading.
Size (mm) Grit 120 180 220 320 400 600 800 1200
6 x 3 x 150 311801 311336 311805 311809 311813 311817 311355 311362
13 x 3 x 150 311803 311337 311807 311811 311815 311819 311356 311363
6 x 6 x 150 311802 311338 311806 311810 311814 311818 311357 311364
13 x 6 x 150 311804 311339 311808 311812 311816 311820 311358 311365
4 x 4 x 100 311400 311340 311410 311411 311412 311413 311359 311366
Ø 6 x 150 311334 311341 311344 311347 311350 311353 311360 311367
Hybrid 6 x 6 x 150 311335 311342 311345 311348 311351 311354 311361 311368
gesswein oil treated stones

Gesswein Premium White

Hard general purpose polishing stone, made of pure white premium Aluminium oxide abrasive, for use on all steels from hard to softer. Exposed sharp grains cause the stone to cut well. Good shape retention for finishing surface details. A special additive makes this stone load resistant. Both our PW and OT stones work well in a profiler and ultrasonic polisher.

  • Pure white premium-grade aluminum oxide stones
  • Specially formulated to be load-resistant.
  • Can be used on all steels, from the hard A2, D2 and M2 to the softer P20, 420SS and SAE4130.
  • Retain their shape well, making them a good choice for finishing details.
  • Can be used in a profiler or ultrasonic polisher.
Size (mm) Grit 100 180 220 320 400 600
6 x 1.6 x 100 - - 311070 311071 311072 -
13 x 3 x 150 312049 311073 311074 312043 311075 311076
6 x 3 x 150 311062 311063 311064 312084 312046 311065
13 x 6 x 150 312050 312032 312062 312044 312087 311077
4 x 4 x 100 - - 312048 312045 311060 311061
6 x 6 x 150 311066 312083 311067 312042 311068 311069
Gesswein premium white polishing stones

Gesswein RA

Manufactured from very hard Aluminium Oxide within a resin bond to give flexibility and resilience. Excellent for corners, deep ribs and areas of fine detail, these stones produce a finer finish than other stones of the same grit. RA stones are extremely versatile and may be used by hand, or with profiler or ultrasonic.

  • Aluminium oxide abrasive bonded together with a unique organic resin bond gives these stones great resiliency.
  • Retain their shape and have a flexing capability, making them resistant to breakage even during heavy use.
  • Leave a finer finish with less stock removal than other stones of the same grit.
  • Can be used by hand, in a profiler or in an ultrasonic polisher on all mould and die steels.
  • Ideal for finishing slots, deep ribs and other hard-to-reach mould areas and can also be used to remove EDM scale.
Size (mm) Grit 90 120 180 220 320 400 600
13 x 1.5 x 150 - 311625 311626 311635 311627 311628 311634
6 x 3 x 150 311601 311605 311609 311613 311617 311629 311621
13 x 3 x 150 311603 311607 311611 311615 311619 311631 311623
13 x 6 x 150 311604 311608 311612 311616 311620 311632 311624
4 x 4 x 100 - - 311404 311405 311406 311417 311407
6 x 6 x 150 311602 311606 311610 311614 311618 311630 311622
Ø 4 x 100 - - - - 311402 - -
RA Gesswein stones

Gesswein General Purpose

  • Cuts well, holds their shape and resists loading.
  • Made of extra-sharp pure white aluminium oxide grains in a specially formulated bond & a proprietary treatment.
  • Suitable for use on both EDM and machined surfaces of all tool and hardened steels.
  • Polishers will notice the special treatment provides a lubricating effect.
Size (mm) Grit 150 180 220 320 400 600
6 x 1.5 x 100 312759 312760 312761 312762 312763 312764
13 x 3 x 150 312765 312766 312767 312768 312769 312770
13 x 6 x 150 312771 312772 312773 312285 312774 312284
4 x 4 x 100 312775 312776 312777 312778 312779 312780
6 x 6 x 150 312781 312782 312783 312784 312785 312786
Ø 6 x 150 312787 312788 312789 312790 312791 312792
Hybrid 6 x 6 x 150 312793 312794 312795 312796 312797 312798
Gesswein General Purpose GP stones

Gesswein Mouldmaker

(Grey/Blue), soft-bonded Silicon Carbide, which constantly presents fresh sharp edged particles to the work material. These stones produce fast stock removal and are widely used on hardened steel surfaces, as well as to rough finish non-ferrous materials. Excellent for contours. Generally used by hand.

  • Resists loading.
  • Ideal for blending, detailing radii and following contours.
  • Suitable for working on all types of steels as well as roughing out nonferrous metals.
  • Medium-soft stone with silicon carbide abrasive designed to break down rapidly and expose fresh edges.
Size (mm) Grit 100 150 220 320 400 600
6 x 1.5 x 100 311295 311296 311133 311134 311135 311136
6 x 3 x 150 311297 311298 311147 311158 311129 311141
13 x 3 x 150 311299 311300 311161 311148 311155 311157
13 x 6 x 150 311307 311308 311123 311126 311140 311144
4 x 4 x 100 311309 311310 311311 311312 311313 311314
6 x 6 x 150 311315 311316 311121 311124 311150 311152
13 x 13 x 150 311317 311318 311149 311154 311151 311142
25 x 25 x 150 311319 311320 311171 311128 311168 311169
Ø 6 x 150 311321 311322 311323 311324 311325 311326
Hybrid 6 x 6 x 150 311327 311328 311329 311330 311331 311332
Gesswein MF Mouldmaker

Gesswein Mouldmaker Plus

(Grey/Blue), slightly harder than MF, the MFP cuts well with slower breakdown. It is a good choice for contours and radii, and generates a silky matt surface on hardened steels. Can be used on non-ferrous materials. May be used by hand or in a profiler.

  • A premium complement to the Mouldmaker Series.
  • Produces a silky matte finish on all prehardened tool steels, from 28Rc SAE 4130 through 60Rc A2 and M2. Can also be used to rough out aluminium, beryllium copper and kirksite.
  • General-purpose, premium-grade green silicon carbide stones.
  • A good choice for stoning contours and radii.
  • Medium stone with slower breakdown characteristics than our standard Mouldmaker stones.
Size (mm) Grit 100 150 220 320 400 600 800 1200
6 x 3 x 150 311183 311184 311185 311159 311130 311167 311186 311187
13 x 3 x 150 311175 311146 311122 311160 311172 311166 311180 311189
13 x 6 x 150 311117 311137 311165 311127 311131 311170 311162 311191
4 x 4 x 100 - 311198 311199 311200 311181 311178 311176 311100
6 x 6 x 150 311177 311119 311164 311125 311156 311163 311179 311188
13 x 13 x 150 311192 311182 311153 311193 311194 311195 311196 311197
25 x 25 x 150 311118 311120 311190 311132 - - - -
Gesswein MFP Mouldmaker Plus

Gesswein Super Fine

Made of levigated alumina, SF series has a very rapid breakdown and does not scratch. Ideal for finishing steel. An excellent stone for final finish prior to diamond polishing.

  • One of our “softest” stones for finishing P20 and 420SS steel surfaces­. Breaks down very rapidly and does not scratch.
  • Contain levigated (finely powdered) alumina.
  • Good choice for finishing details.
  • Not quite as soft as our Ultra-Soft stones.
Size (mm) Grit 1200
6 x 3 x 150 312047
13 x 3 x 150 312036
13 x 6 x 150 312006
4 x 4 x 100 312060
6 x 6 x 150 312034
gesswein super fine stones

Gesswein Ultra Soft

Specially developed for use on soft and non-ferrous metals, with excellent results obtained on Aluminium in particular. Manufactured with an extra soft bond, the US stone shapes readily to contours. Fast cutting without loading. Recommended for use by hand only.

  • Aluminium oxide abrasive with a special bonding agent designed for very rapid breakdown.
  • Cuts fast without loading; easily shaped for contours.
  • Formulated for soft metals, stainless steel, aluminium,brass, beryllium and kirksite.
Size (mm) Grit 120 320 600 1200
13 x 3 x 150 312038 312010 312015 312016
13 x 6 x 150 312008 312011 312013 312033
25 x 13 x 150 312039 312035 312014 311054
6 x 6 x 150 312007 312009 312012 312040
25 x 25 x 150 311050 311051 311052 311053
gesswein ultra soft stones

Gesswein Rough Out

  • Large, coarse, relatively soft stones containing aluminum oxide.
  • Cuts fast with rapid breakdown.
  • Quickly remove rough scratches and machine tool marks.
  • A good choice for roughing surfaces of larger molds and dies.
  • Ideal for “hogging” out large amounts of material prior to finishing.
Size (mm) Grit 80 100 150 220
13 x 6 x 150 - 311902 - -
25 x 6 x 200 311903 311906 311909 311912
25 x 13 x 200 311904 311907 311910 311913
38 x 19 x 200 311905 311908 311911 311914
6 x 6 x 200 - 311901 - -
rough out stones