Manufactures high-performance grinding wheels and precision grinding tools – conventional, CBN and diamond – in St. Ingbert
Comet Schleiftechnik GmbH
St. Ingbert (DE)New on Amplifa
About COMET Schleiftechnik
Comet Schleiftechnik GmbH manufactures high-performance grinding wheels and other precision grinding tools on more than 15,000 m² of company premises in St. Ingbert. Founded in 1949, the owner-managed family company produces vitrified and resin-bonded grinding wheels in fused alumina, sintered alumina and silicon carbide, CBN and diamond grinding wheels in resin, hybrid, metal, vitrified and electroplated bonds, as well as dressing tools and diamond/CBN cutting tools. Production includes mixing with electronic weighing systems, pressing on NC-controlled presses with online data recording, firing of vitrified grinding bodies at 1000–1300 °C in kilns with electronic firing-profile control, CNC finishing and comprehensive final inspection. Customers come from the automotive industry, machinery and plant engineering, aerospace, tool manufacturers and plastics processing companies. With an export share of over 60 %, COMET supplies customers worldwide and, in addition to its stock program, offers express manufacturing, reworking, regrinding service and on-site process optimization.
- Site
- St. Ingbert
- Processes
- Manufacture of high-performance grinding wheels and precision grinding tools, Surface grinding (grinding wheels for surface grinding, reworking to final dimensions), Cylindrical grinding (external and internal cylindrical grinding wheels, centreless through-feed and, Gear grinding (continuous generating grinding and discontinuous grinding, generation, Diamond and CBN grinding wheels (resin, hybrid, metal, vitrified and electroplated bond), Tool grinding / special grinding processes (grinding wheels according to catalogue), Cutting & roughing (cut-off wheels, segment wheels, grinding and polishing wheels), Manufacture of stationary dressing tools (DIAROLL, DIALETTEN, single-point dressers, profile
- Materials
- Fused alumina, Sintered alumina, Silicon carbide, CBN (cubic boron nitride), Diamond (natural diamond, PCD, MKD, CVD diamond), Carbide, Low-alloy steels (soft and hardened up to approx. 62 HRC), High-alloy, high-strength steels
- Certificates
- DIN EN ISO 9001:2015, DIN EN 16247 (energy efficiency)
- Founded
- 1949
- Industries
- Automotive industry and suppliers, Machinery and plant engineering, Tool manufacturers, Machine shops, Plastics processing companies, Aerospace
- 01
Mixing (electronic weighing systems)
- 02
Pressing (NC-controlled presses with online data recording)
- 03
Firing (1000–1300 °C, electronic firing-profile control)
- 04
Finishing (CNC machining, profiling)
- 05
Testing (dimensional, unbalance, hardness, ring and ultrasonic testing)
- 06
Shipping (stock program, express service)
Materials & Processes
Fused alumina
Abrasive for vitrified and resin-bonded grinding wheels for soft and hardened steels.
Sintered alumina
Abrasive for high-load vitrified grinding wheels.
Silicon carbide
Abrasive for wheels for HSS steels, non-ferrous metals, aluminium, copper and stainless steel materials.
CBN (cubic boron nitride)
Superhard abrasive for hardened long-chipping steels from approx. 45 HRC.
Diamond (natural diamond, PCD, MKD, CVD)
Grinding and dressing material for carbide, ceramics, glass, stone and short-chipping materials.
Resin bond
Most common bond for diamond and CBN wheels with good free-cutting behaviour and low heat generation.
Hybrid bond
High-performance bond for deep grinding, e.g. on carbide (M23) and HSS (M91).
Metal bond
Bronze-based bond with good edge and profile retention for ceramics, glass, stone and concrete.
Vitrified bond
Mainly with CBN grit for long-chipping materials, easy to profile, large-series production.
Electroplated bond
Single-layer electroplated diamond/CBN tools, can be re-coated multiple times.
Carbide
Substrate and cutting material for diamond and CBN cutting tools such as indexable inserts.
GRP/CFRP
Materials machinable with diamond and CBN grinding wheels.
Locations
St. Ingbert
DEHeadquarters, production and administration
- Part weight / size
- Wheel diameters up to 915 mm (gear grinding)
- Lot size
- Prototype to large series, express manufacturing in 10 working days
- Materials
- Fused alumina, sintered alumina, silicon carbide, CBN, diamond
- NC-controlled presses with online data recording
- Ceramic kilns (1000–1300 °C, electronic firing-profile control)
- Second kiln hall (since 2011)
- CNC machining machines for profiling of grinding wheels
- Photovoltaic system (since 2010)
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of high-performance grinding wheels and precision grinding toolsSurface | – | – | – | – | Fused alumina, Sintered alumina, Silicon carbide, CBN, Diamond |
| Surface grinding (grinding wheels for surface grinding, reworking to final dimensions)Surface | – | – | – | – | soft and hardened low-alloy steels, Cast iron, hardened steels, high-alloy high-strength steels, HSS, Non-ferrous metals, Aluminium, Copper, Stainless steel materials |
| Cylindrical grinding (external and internal cylindrical grinding wheels, centreless through-feed andSurface | – | – | – | – | high-alloy and hardened steels, high-temperature-resistant alloyed cast iron, Steel |
| Gear grinding (continuous generating grinding and discontinuous grinding, generationSurface | – | – | – | – | – |
| Diamond and CBN grinding wheels (resin, hybrid, metal, vitrified and electroplated bond)Surface | – | – | – | – | Carbide, Tool steel, HSS, Ceramics, Glass, Stone, Concrete, Graphite, GRP/CFRP, High-alloy steels, Bearing steel, Plastics |
| Tool grinding / special grinding processes (grinding wheels according to catalogue)Surface | – | – | – | – | – |
| Cutting & roughing (cut-off wheels, segment wheels, grinding and polishing wheels)Surface | – | – | – | – | – |
| Manufacture of stationary dressing tools (DIAROLL, DIALETTEN, single-point dressers, profileSurface | – | – | – | – | Natural diamond, synthetic diamond, PCD, MKD, CVD diamond, Sintered metal, Steel |
| Manufacture of rotary dressing tools (diamond profile rolls, diamond form rolls, dressers up to 400Surface | – | 400 mm (dressing range wheel diamete | – | – | Diamond, PCD, CVD |
| Manufacture of diamond and CBN cutting tools (turning tools, shank tools, finger andCutting | – | – | – | – | CBN, PCD, CVD diamond, MKD, Natural diamond, Carbide, Steel, stainless antimagnetic steel |
| Regrinding service for diamond/CBN grinding wheels and dressers (also third-party products,Surface | – | – | – | – | Diamond, CBN |
| Reworking of grinding wheels (width, diameter, profile, bore)Surface | – | – | – | – | – |
| Process optimization (optimization of grinding, cutting and dressing parameters on site)Engineering | – | – | – | – | – |
| Express manufacturing of grinding wheels (standard delivery time 8 weeks, express 2 weeks or 10Surface | – | – | – | – | – |
| Final inspection/testing: dimensional inspection, unbalance inspection, hardness testing, ring andTesting | – | – | – | – | – |
| Manufacture of vitrified grinding bodies (mixing, pressing, firing at 1000–1300 °C,Surface | – | – | – | – | vitrified grinding bodies, fused and sintered alumina |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| NC-controlled presses (with online data recording) | – | – | – | – | St. Ingbert |
| Ceramic kilns (firing temperature 1000–1300 °C, electronic firing-profile control) | – | – | – | – | St. Ingbert (second kiln hall since 2011) |
| CNC machining machines (finishing/profiling of grinding wheels) | – | – | – | – | St. Ingbert |
Additional services
Quality
COMET is TÜV-inspected and certified to ISO 9001:2015; quality assurance includes incoming goods inspection, production-accompanying inspection and final inspection with dimensional, unbalance, hardness, ring and ultrasonic testing for cracks as well as strength testing by trial run. In many cases, in-house inspection specifications exceed the official requirements.
| Evidence | St. Ingbert |
|---|---|
| DIN EN ISO 9001:2015 | |
| DIN EN 16247 (energy efficiency) |
History
- 1949
Founded in St. Ingbert by Dr. Werner Seidel sen.
- 1958
Relocation to the site "Im Pottaschwald"
- 1985
Introduction of the COMET EXPRESS SERVICE: manufacturing to customer request in 10 working days
- 1988
Acquisition of the Dettinger Schleifscheibenfabrik / Plochingen
- 1991
Acquisition of Meules Ars / Paris
- 1995
Certification to DIN EN ISO 9001
- 2001
Presentation of the highly porous grinding wheel generation COMET AIR CUT
- 2002
Construction of the new office and administration building
- 2003
Expansion of the product range to CBN and diamond grinding wheels
- 2005
Acquisition of Ph. Oskar Weiss Diamant / Stuttgart
- 2006
Presentation of the COMET COOL CUT grinding wheel generation for deep and profile grinding; introduction of a new afterburning technology to reduce kiln emissions
- 2009
Construction of the new quality control department; acquisition of Abrasifs Virudia / Colmar
- 2010
Installation of a photovoltaic system to reduce CO2 emissions
- 2011
Construction of a second kiln hall to expand capacity
- 2014
Acquisition of Gossweiler Schleifwerkzeuge
- 2015
Presentation of the new grinding wheel generation Galaxy2 for gear grinding
- 2016
Acquisition of Elbe Schleifmittelwerke GmbH & CO KG
- 2018
Acquisition of Bauer Werkzeugtechnik
- 2020
Presentation of the new grinding wheel generation GreenTech