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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryIndustryMechanical Engineering IndustryMännedorfErnst Grob AG
Ernst Grob AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Ernst Grob AG is the development and manufacture of machines and systems for cold forming processes, particularly for the processing of metal parts through external and internal forming, slitting, punching and spinning. The company also offers integrated services from product development to maintenance and works closely with customers to develop individual solutions for their specific requirements.

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Products & services

Industry:Mechanical Engineering Industry
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4.1/5

Ernst Grob AG

11
Cold forming machines
Cold forming machines for A9/A9T, C6, C9/C9T, C9T-Helix and T12, as well as custom special machines for external and internal gearing.
Cold forming processes
Cold forming processes for external and internal gearing, slotting & coining, as well as spinning for the efficient production of complex components and geometries.
Engineering and co-engineering
Development and co-engineering for custom concepts, technical design and joint solution development during the development phase.
Contract manufacturing
Contract manufacturing of workpieces using roughing processes, from standard gearing to special geometries, for small and large series.
Customer service
Customer service for the entire machine lifecycle, including training, inspections, maintenance and repairs.
Toolmaking
Toolmaking for specific requirements, including manufacture of suitable tools and short-notice delivery.
Factory overhauls and conversions
Factory overhauls and conversions for retrofits, functional adaptations and modernization of existing systems for continued long-term use.
Used machines
Used machines, inspected and reconditioned by the specialist team, as a cost-effective alternative with Grob technology.
Applications for drive and gearbox technology
Applications for motors, gearboxes, differentials, drive shafts and Cardan shafts with profiling and highly precise gearing.
Applications for extruders and pumps
Applications for extruders and pumps with highly precise, wear-resistant gearing and shafts designed for specific materials.
Applications for chassis, steering and brakes
Applications for axles, steering and brakes with weight-optimized formed components and splines.
Trust & reputation

ranQ Trust Score of Ernst Grob AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of October 2026

Ernst Grob AG scores 60.4 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.63.324%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.45.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.70.08%
Ernst Grob AG scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Ernst Grob AG scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Ernst Grob AG scores 46.5 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.82.94%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

Ernst Grob AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.2 out of 5 stars from 5 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.2
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle4.25
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

November 25, 2015Media
«Wir konnten sogar neue Leute einstellen»
tagesanzeiger.ch

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Location

Rohrgasse 9
8708 Männedorf
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.970.774
Founded
1986 · 40 years
Last commercial register change
August 8, 2025
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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