Introduction Index - Swiss Instruments Ltd

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
INTRODUCTION
CONTENT Details Page
BONDS Resin-ceramic 1
cBN in vitrified bond 1
Metal 2
Galvanic surface layer 2
Bakelite 3
Ceramic 3
Grinding agents Diamond and cBN 4
Grit sizes cBN 5
Diamant 6
Comparison micron grit sizes 7
Concentration C (V) 8
Surface quality Rz, Ra 9
Cutting speed m/sec r.p.m. 10
Wheels engraving Haefeli-ID 11
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
BONDS
In addition to the grit size and concentration, the bond decisively determines the performance and behaviour of the Diamond and
cBN wheel. Various adapted bonds provide optimum solutions for numerous different grinding tasks. They are distinguished based
on their binder materials, which in turn contain numerous alloy types.
Resin-ceramic bond (Resin) cBN in vitrified bond (Vitrified)
Haefeli bond name: R100 - R999 Haefeli bond name: V5000 - V5999
Resins, to which apart from the grinding granules also filler
has been added, are used as binding agent. Grinding wheels
with resin-ceramic bond offer a wide range of application.
The wheels offer rapid and cool grinding, can be used for dry
and wet grinding and generate only low grinding forces. The
resin-ceramic bond is used from polishing grinding to deep
grinding processes with high rates of material removal. In
short, it is the most universal bond.
Products Products
Type: 1A1, 1V1, 11V9, 12A2, profiles, 1A1W Type: 1A1W, 1A1, profiles
Diameter: ∅ 3.0 - 400 mm Diameter: ∅ 4.0 - 60 mm
Granulation: D7 - D251 Granulation: D46 - D251
Concentration: C 30 - C 125 Concentration: C 100 - C 150
Application: Materials for diamond:
Hard metal, cermets
The mixture of meltable glass powder, filler and cBN
abrasive wheel constitutes the ceramic bond. In contrast to
the resin-ceramic and metal bonds, the vitrified bond offers
a.o. the advantage that a certain pore volume can be
produced. As the bond is made from glass, the grinding
wheels cannot withstand major impacts or temperature
shocks. Cooling is therefore always required. The ceramic
bond provides cool grinding with low grinding forces and
can be easily dressed on the machine, using a rotating
dresser.
Materials for cBN: Application: Materials for cBN:
HSS, alloyed tool steel, hardened steel
HSS, alloyed tool steel, hardened steel
Cooling: Oil, emulsion, dry Cooling: Only with cooling, such as oil, emulsion
Regeneration: HACO-FLEX manually Regeneration: -
Dressing: Rotating SiC wheels (no stationary tool or
metal-bonded dressing wheels!)
Dressing: Rotating, metal-bonded conical wheels
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
BONDS
Metal bond: (Metal) Galvanic surface layer: (Electro plated)
Haefeli bond name: M4000 - M4999 Haefeli bond name: E6000 - E6999
Sintered metal bonds are predominantly bronze bonds and
are characterised by a higher bond hardness. The grains are
tightly enclosed, as a result of which, the grinding wheel
appears to be "more blunt" but offers a significantly longer
service life. In contrast to resin-ceramic-bonded grinding
wheels, the metal bond generates more grinding heat if it is
not regenerated effectively (-> HACO-FLEX). Grinding
wheels with metal bonds achieve harder grinding at a lower
speed. Metal bonding is best suited for sharp profiles from
radius R 0.08 mm onwards, thin bond widths and very small
sintered grinding pins (from Ø 0.2 mm) and for use on
materials subjecting the bond to high levels of wear. Metal
bonds are generally the most hard wearing bonds.
Products Products
Type: 1A1W, profiles such as 14E1, 14A1R, Type: 1A1, profiles, 1A1W
Diameter: ∅ 0.2 - 300 mm Diameter: ∅ 0.5 - 400 mm
Granulation: D16 - D251 Granulation: D46 - D352
Concentration: C 30 - C 175
Application: Materials for diamond: Application: Materials for diamond:
Hard metal, cermets, sapphire, ruby, glass,
technical ceramics
Materials for cBN: Materials for cBN:
HSS, alloyed tool steel, hardened steel HSS, alloyed tool steel, hardened steel
Cooling: Oil, emulsion Cooling: Oil, emulsion, dry
Regeneration: HACO-FLEX manually Regeneration: -
Dressing: Rotating SiC wheels (no stationary tool or
metal-bonded dressing wheels!)
Dressing: -
This bond is electro-plated onto a steel base structure. As a
result of this single-layer bonding process, the grinding
coating produces large swarfs. The galvanic bond is
particularly suited for applying to profiled base structures.
Profile accuracy does, however, depend on the grain size.
Due to the large grain overhang, the covered workpiece
offers a very good grip and leaves the workpiece with a
very rough surface. With increased use, the grip is reduced
as the grain peaks are worn away.
Hard metal, plastic, glass fiber reinforced
plastic
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
BONDS
Bakelite bond (Bakelite) Ceramic bond
Haefeli bond name: B3000 - B3999
Bakelite, to which apart from the grinding granules also filler
has been added, is used as binding agent. In the past, the
bonding was used with fine granules due to its polishing
effect. Grinding wheels with bakelite bond are only still used
in a few exceptional cases as bakelite can be substituted by
more versatile and more cleanly cutting resin bonds.
The ceramic bond consists of meltable glass powder, filler
and abrasive grains. It is the cheapest and most popular
bond. It can also be used to grind "soft" (

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
SCHLEIFMITTEL
DIAMANT
Diamant ist das härteste bekannte
Material (8000 Knoop Härte) und
eignet sich zum Schleifen von
kristallinen Werkstoffen wie:
LES MATIÈRES
ABRASIVES
DIAMANT
Le Diamant est la matière la plus
dur (8000 dureté Knoop) qu'on
connaît et convient au meulage
des matières dont au moins une
partie est cristaline, soit:
- Hartmetall - carbur de tungstene - tungsten carbide
- Keramik - céramique - ceramic
- Glas - verre - glass
- Saphir - saphire - saphire
- Graphit - graphite - graphite
- Ferrit - ferrite - ferrite
- Ferro-Tic - ferro-tic - ferro-tic
- u.s.w. - e.t.c. - a.s.f.
cBN (cubic Boron Nitride)
(Borazon)
cBN ist das zweithärteste Material
(4500 Knoop Härte) und eignet sich
zum Schleifen von Werkstoffen
ohne kristalline Anteile wie:
cBN ( c ubic B oron N itride )
(Borazon)
Le cBN et la matière la plus dure
après le Diamant (4500 dureté
Knoop) qu'on conna'it et convient
au meulage des matières sans
partie cristaline, soit:
- HSS-Stähle - acier HSS - high-speed steel
- Werkzeugstähle - acier à outils et étampage - tool and die steel
- Einsatz-Stähle - acier de cémentation - carburized steel
- Stellit - stéllite - stellite
- u.s.w. - e.t.c. - a.s.f.
Die härtesten Materialien im
Vergleich:
Les matières les plus dures en
comparaison:
GRINDING AGENTS
DIAMOND
Diamond is the hardest material
known (8000 Knoop hardness) and
is suited for grinding of material
with at least part of crystaline
content, such as:
cBN (cubic Boron Nitride)
(Borazon)
cBN is the second hardest material
known (4500 Knoop hardness) and
is suited for grinding material
without crystalline content such
as:
The hardest materials in
comparison:
Material: Knoop Härte: Matière: Knoop dureté: Material: Knoop hardness:
Diamant 8000 Diamant 8000 Diamond 8000
cBN 4500 cBN 4500 cBN 4500
SiC 2700 SiC 2700 SiC 2700
Al 20 3 2500 Al 2 0 3 2500 Al 20 3 2500
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
cBN KORNGRÖSSEN / DIMENSIONS DES GRAINS / GRIT SIZES
For cBN grinding tools cBN
FEPA-Grit sizes
Micron
min.
Micron
max.
FEPA
Application US mesh
212 250 +1= BN 251 Very rough ginding = 60 - 70
180 212 +1= BN 213 = 70 - 80
150 180 +1= BN 181 = 80 - 100
125 150 +1= BN 151 = 100 - 120
106 125 +1= BN 126 = 120 - 140
90 106 +1= BN 107 Rough grinding = 140 - 170
75 90 +1= BN 91 = 170 - 200
63 75 +1= BN 76 = 200 - 230
53 63 +1= BN 64 Semifinish grinding = 230 - 270
Micron-Grit sizes
32 38 +1= BN 39 B 35 = 400 - 500
22 36 +1= BN 37 B 30
25 32 +1= BN 33 B 30 Ultrafine grinding = 500 - 600
20 30 +1= BN 31 MB 25
10 20 +1= BN 21 MB 16
8 15 +1= BN 16 MB 15 (abt. 1000 )
6 12 +1= BN 13 MB 10
US mesh
(US mesh): Grains per inch
1" = 25,4 mm
max. Grit size FEPA .
ø
180 micr. + 1 micr. = BN 181 80 - 100 = 80-100 Grains per inch
180/1000 mm
45 micr. + 1 micr. = BN 46 325 - 400 = 325-400 Grains per inch
45/1000 mm
HAEFELI-Micron-Grit sizes follow the logic of FEPA-norm (biggest grit in micron + 1 = FEPA/HAEFELI-norm)
Ceramic wheels
(SiC, Al 20 3, ..)
45 53 +1= BN 54 = 270 - 325
38 45 +1= BN 46 = 325 - 400
Micron
min.
Micron
max. HAEFELI
Other
producers
description
30 40 +1= BN 41 MB 40 Fine grinding
Dez 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
DIAMOND KORNGRÖSSEN / DIMENSIONS DES GRAINS / GRIT SIZES
For diamond grinding tools DIAMOND
FEPA-Grit sizes
Micron
min.
Micron
max.
FEPA
Application US mesh
212 250 +1= D 251 = 60 - 70
180 212 +1= D 213 = 70 - 80
150 180 +1= D 181 Rough grinding = 80 - 100
125 150 +1= D 151 = 100 - 120
106 125 +1= D 126 = 120 - 140
90 106 +1= D 107 Semifinish grinding = 140 - 170
75 90 +1= D 91 = 170 - 200
63 75 +1= D 76 = 200 - 230
53 63 +1= D 64 Fine grinding = 230 - 270
Micron-Grit sizes
32 38 +1= D 39 D 35 = 400 - 500
22 36 +1= D 37 D 30
25 32 +1= D 33 D 30 = 500 - 600
20 30 +1= D 31 MD 25
15 25 +1= D 26
10 20 +1= D 21 MD 16
8 15 +1= D 16 MD 15 (abt. 1000 )
6 12 +1= D 13 MD 10
US mesh
(US mesh): Grains per inch
1" = 25,4 mm
max. Grit size FEPA .
ø
180 micr. + 1 micr. = D 181 80 - 100 = 80-100 Grains per inch
180/1000 mm
45 micr. + 1 micr. = D 46 325 - 400 = 325-400 Grains per inch
45/1000 mm
HAEFELI-Micron-Grit sizes follow the logic of FEPA-norm (biggest grit in micron + 1 = FEPA/HAEFELI-norm)
Ceramic wheels
(SiC, Al 20 3, ..)
45 53 +1= D 54 = 270 - 325
38 45 +1= D 46 = 325 - 400
Micron
min.
Micron
max. HAEFELI
Other
producers
description
30 40 +1= D 41 MD 40 Ultrafine grinding
Dez 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
Vergleich Micron - Korngrössen / Comparaison des grains microns /
Comparison micron grit sizes
Micron-Körnungen nach FEPA Idee
Grains micron d'après idée FEPA
micron grit sizes following FEPA idea
Micron
min.
Micron
max +1=
HAEFELI
Bezeichnung
Hersteller A
Désignation
producteur A
Descprition
producer A
32 52 D 25
30 45 MD 40 / MB 40
32 40 D 35
Bezeichnung
Hersteller B
Désignation
producteur B
Descprition
producer B
30 40 +1= MD / MB 42 D 20 B / B 30
20 40 +1= MD / MB 41 MD 25 / MB 25
32 38 +1= MD / MB 39
22 36 +1= MD / MB 37
25 32 +1= MD / MB 33 D 30 / B 30
25 30 D 20 A / B 30
20 30 +1= MD / MB 31 D 25 MD 20
20 25 D 15 C
15 25 +1= MD / MB 26 D 20 MD 18 D 30 / B 30
10 25 D 15
12 22 +1= MD / MB 23 MD 16 / MB 16
15 20 D 15 B / B 15 D 20
10 20 +1= MD / MB 21 D 15 / B 15 D 15 / B 15
10 16 MD 14
8 / 10 15 +1= MD / MB 16 D 10 D 15 A / B 9
6 12 +1= MD / MB 13 D 7 MD 10 D 10 / B 10
6 10 +1= MD / MB 11
5 10 D 7 / B 6
4 8 +1= MD / MB 9 D 6 MD 6.3 D 6
3 6 +1= MD 7 MD 4
2 5 D 3 / B 3
1 5 +1= MD 6
2 4 +1= MD 5 D 3 MD 2.5
2 3 MD 1.8
0.5 3 +1= MD 4
1 2 +1= MD 3 D 1 D 1 / B 1 MD 1
0 1 +1= MD 2
0.5 1 D 0.7
< 0.5 D 0.25
Bezeichnung
Hersteller C
Désignation
producteur C
Descprition
producer C
Bezeichnung
Hersteller D
Désignation
producteur D
Descprition
producer D
Dez 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
cBN KONZENTRATION / CONCENTRATION C
DIAMANT
Konzentration C: cBN/Diamant-Körner Sättigung im Schleifbelag
Concentration C: Densité des grain cBN/Diamant dans le liant
Concentration C: Density of the cB/Diamond grit in the bond
Schleifbelag / Couche / Layer
Bezeichnung / Désignation /
Designation
Ansicht Volumen Fepa
vue cBN + Diamant cBN + Diamant cBN
view % C V
0 V% C 0 (V0)
7.5 V% C 30 V70
12.5 V% C 50 V120
15 V% C 60 V150
18.75 V% C 75 V180
25 V% C 100 V240
31.25 V% C 125 V300
37.5 V% C 150 V360
50 V% C 200 V480
100 V% C 400 (V1000)
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
OBERFLÄCHENGÜTE / L'ETAT DE SURFACE / SURFACE QUALITY
Kreuzschliff - Richtwerte / Meulage croisée - Valeurs indicatives / Cross grinding - Standard values
Ra (micr.)
Rmax (micr.)
Rz (micr.)
cBN DIAMOND
BN 151
BN 126
BN 107 D 181
BN 91 D 151
BN 76 D 126
BN 64 D 107
BN 54 D 91
BN 46 D 76
D 64
D 54
D 46
D 41
D 26
D 13
0.025
0.50
0.40
0.05
0.80
0.63
Ultrafine grinding
Superfinition
Feinstschleifen
Feinschleifen
Fine grinding
Feinstschleifen Feinschleifen Vorschleifen Grobschleifen Schruppen
Superfinition Finition Ebauche Ebauche grossière Dégrossissage
Ultrafine grinding Fine grinding Semifinish grinding Rough grinding Very rough grinding
Dez 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch
1.25
1.00
N 1 N 2 N 3
0.10 0.2
Finition
2.5
2.0
N 4
Ebauche
0.4
5.0
4.0
N 5
Vorschleifen
Semifinish grinding
Grobschleifen
Ebauche grossière
Rough grinding
Schleifen mit HAEFELI Kunstharz-Keramik-Bindungen / Meulage avec des liants HAEFELI résine-céramique /
Grinding with HAEFELI resin ceramic bonds
0.8
8.0
6.3
N 6
Schruppen
Very rough grinding

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
SCHNITT-GESCHWINDIGKEIT / VITESSE DE COUPE / CUTTING SPEED
Schleifkörper-
Durchmesser
Diamètre de la
meule
Diameter of the
wheel
cBN- und Diamantwerkzeuge / outils cBN et Diamant / cBN and Diamond tools
2 5 10 15 20 25 30 35 40 45
(m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec) (m/sec)
r.p.m.
Kunstharz-Keramik / résine-céramique / resin-ceramic
Metall / métal / metal
Vollkeramik / vitrifiée / vitrified
∅ 600 mm `64 `159 `318 `477 `637 `796 `955 1`114 1`273 1`432 r.p.m.
∅ 500 mm `76 `191 `382 `573 `764 `955 1`146 1`337 1`528 1`719 r.p.m.
∅ 400 mm `95 `239 `477 `716 `955 1`194 1`432 1`671 1`910 2`148 r.p.m.
∅ 350 mm `109 `273 `546 `818 1`091 1`364 1`637 1`910 2`182 2`455 r.p.m.
∅ 300 mm `127 `318 `637 `955 1`273 1`591 1`910 2`228 2`546 2`864 r.p.m.
∅ 250 mm `153 `382 `764 1`146 1`528 1`910 2`292 2`673 3`055 3`437 r.p.m.
∅ 225 mm `170 `424 `849 1`273 1`697 2`122 2`546 2`971 3`395 3`819 r.p.m.
∅ 200 mm `191 `477 `955 1`432 1`910 2`387 2`864 3`342 3`819 4`297 r.p.m.
∅ 175 mm `218 `546 1`091 1`637 2`182 2`728 3`274 3`819 4`365 4`910 r.p.m.
∅ 150 mm `255 `637 1`273 1`910 2`546 3`183 3`819 4`456 5`092 5`729 r.p.m.
∅ 125 mm `306 `764 1`528 2`292 3`055 3`819 4`583 5`347 6`111 6`875 r.p.m.
∅ 100 mm `382 `955 1`910 2`864 3`819 4`774 5`729 6`684 7`638 8`593 r.p.m.
∅ 75 mm `509 1`273 2`546 3`819 5`092 6`365 7`638 8`912 10`185 11`458 r.p.m.
∅ 50 mm `764 1`910 3`819 5`729 7`638 9`548 11`458 13`367 15`277 17`187 r.p.m.
∅ 40 mm `955 2`387 4`774 7`161 9`548 11`935 14`322 16`709 19`096 21`483 r.p.m.
∅ 30 mm 1`273 3`183 6`365 9`548 12`731 15`913 19`096 22`279 25`461 28`644 r.p.m.
∅ 25 mm 1`528 3`819 7`638 11`458 15`277 19`096 22`915 26`735 30`554 34`373 r.p.m.
∅ 20 mm 1`910 4`774 9`548 14`322 19`096 23`870 28`644 33`418 38`192 42`966 r.p.m.
∅ 15 mm 2`546 6`365 12`731 19`096 25`461 31`827 38`192 44`558 50`923 57`288 r.p.m.
∅ 12 mm 3`183 7`957 15`913 23`870 31`827 39`784 47`740 55`697 63`654 71`610 r.p.m.
∅ 10 mm 3`819 9`548 19`096 28`644 38`192 47`740 57`288 66`836 76`384 85`933 r.p.m.
∅ 8 mm 4`774 11`935 23`870 35`805 47`740 59`675 71`610 83`546 95`481 107`416 r.p.m.
∅ 6 mm 6`365 15`913 31`827 47`740 63`654 79`567 95`481 111`394 127`307 143`221 r.p.m.
∅ 5 mm 7`638 19`096 38`192 57`288 76`384 95`481 114`577 133`673 152`769 171`865 r.p.m.
∅ 4 mm 9`548 23`870 47`740 71`610 95`481 119`351 143`221 167`091 190`961 214`831 r.p.m.
∅ 3 mm 12`731 31`827 63`654 95`481 127`307 159`134 190`961 222`788 254`615 286`442 r.p.m.
∅ 2 mm 19`096 47`740 95`481 143`221 190`961 238`701 286`442 334`182 r.p.m.
∅ 1.8 mm 21`218 53`045 106`090 159`134 212`179 265`224 318`269 r.p.m.
∅ 1.5 mm 25`461 63`654 127`307 190`961 254`615 318`269 r.p.m.
∅ 1.2 mm 31`827 79`567 159`134 238`701 318`269 r.p.m.
∅ 1.0 mm 38`192 95`481 190`961 286`442 r.p.m.
∅ 0.8 mm 47`740 119`351 238`701 r.p.m.
∅ 0.6 mm 63`654 159`134 318`269 r.p.m.
∅ 0.5 mm 76`384 190`961 r.p.m.
∅ 0.4 mm 95`481 238`701 r.p.m.
∅ 0.3 mm 127`307 318`269 r.p.m.
∅ 0.2 mm 190`961 r.p.m.
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch
r.p.m.

Entwicklung und Fabrikation von
cBN- und Diamantwerkzeugen
SCHEIBEN-GRAVUR / GRAVAGE DE MEULES / WHEELS ENGRAVING
Bindung
Liant
Bond
Konzentration
Concentration
cBN oder Diamant
Korngrösse cBN ou Diamant
Grain cBN or Diamant
Grit size
Produktionsnummer
No. de productions
Productionnumber
Apr 05
HAEFELI Diamantwerkzeugfabrik AG, CH-8046 Zürich
Riedenhaldenstrasse 51 Tel: +41 (0)44 377 80 50 Fax: +41 (0)44 377 80 60 Email: post@haefeli-info.ch Internet: www.haefeli-info.ch