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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryRetail & CommerceAuto Repair ShopsThunZSW Zylinderschleifwerk Bertolino GmbH
ZSW Zylinderschleifwerk Bertolino GmbH Logo
Verified· 4 sourcesTrust Score
Summary

About the company

ZSW Zylinderschleifwerk Bertolino GmbH performs overhaul and repair of petrol and diesel engines and provides cylinder head machining, flywheel grinding and dynamic balancing services. The workshop also manufactures mechanical and industrial components (turning, milling, grinding, honing), offers on‑site interventions such as removal of broken bolts, and sells engine parts.

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Products & services

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4.0/5

ZSW Zylinderschleifwerk Bertolino GmbH

✓ Offered
8
Engine overhauls and engine machining
Overhaul, machine and fit all engine components for petrol and diesel engines; also repairs and minor machining operations such as flywheel grinding or surface milling cylinder heads.
Cylinder head machining and overhauls
Plane cylinder heads or fully overhaul them; including machining of cylinder-head components and suitable reconditioning.
Flywheel grinding
Grind damaged flywheels and perform minor flywheel machining in an express service.
Precision balancing
Precision balance crankshafts and assemblies and carry out dynamic balancing as part of mechanical work.
Mobile repair and boring work
Remove broken-off screws and glow plugs, repair threads and carry out work on site even with the parts installed.
Mechanical custom fabrication
Milling, turning, honing, drilling, grinding and producing mechanical parts to specification.
Machining of industrial parts
Turn, mill, grind and hone industrial parts.
Sale of engine parts
Sell engine parts such as plain bearings, valves and pistons.
Trust & reputation

ranQ Trust Score of ZSW Zylinderschleifwerk Bertolino GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

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Data basis 100% · As of October 2026

ZSW Zylinderschleifwerk Bertolino GmbH scores 82.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.79.124%
  • 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.81.910%
  • 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.95.08%
ZSW Zylinderschleifwerk Bertolino GmbH scores 65.0 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.58.012%
  • 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.55.07%
ZSW Zylinderschleifwerk Bertolino GmbH 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%
ZSW Zylinderschleifwerk Bertolino GmbH scores 5.5 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 35.0.94%
  • 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

ZSW Zylinderschleifwerk Bertolino GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.7 out of 5 stars from 24 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.7
of 5

Aggregated from 24 reviews across all connected sources

Sources
GGoogle4.724
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

December 19, 2022Media
Thuner Unternehmen: Stabübergabe im Zylinderschleifwerk Bertolino
bernerzeitung.ch

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Comparisons

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Location

Gwattstrasse 64
3604 Thun
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-271.157.863
Founded
2022 · 4 years
Last commercial register change
October 11, 2022
Employees
1 to 10
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.88.06%
  • 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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