Novexa 55 rue Linné 26500 Bourg les VALENCE
Contact us+33 (0)4 75 25 14 18 France


Our interventions are guaranteed, our results are quantifiable and our clients satisfied.

Gear reprofiling

  • Less than 0.15 mm reprofiling tolerance (kiln) and 0.1 mm (ball mill) – tolerance close to that of a new ring
  • Durability is prolonged by 8 to 10+ years (depending on wear speed rates)
  • Substantial reduction of vibration levels ( -50% to -80%)
  • Strict compliance with the gear’s involute profile
  • At least 70% facewidth contact (light gear honing necessary to achieve 90%)
  • Average of 3,000 measurements before and after reprofiling

On-site tire/roller machining

Machining of ball mill trunnion

  • Diametre tolerance of less than 0.2 mm
  • Flatness inferior to 0.05 mm
  • Circularity of less than 0.1 mm
  • Maximum possible roughness 0.8 micrometres


  • 12-month guarantee after intervention
  • Re-assembling follows a strict and regulated protocol

The results

Our results are measurable

When it comes to gears, clients compare part replacement to a reprofiling service’s quality and performance using the vibration levels.
For a new girth gear: the usual maximum vibration level is 5 mm/s.

Novexa’s latest assignments show a very low vibration level:

  • HHOLCIM prachovice. Vibrations before intervention: 37 mm/s. After intervention 4 mm/s, in March 2013.
  • Omya Orgon. Vibrations before intervention: 15mm/s. After intervention 2mm/s, in March 2015.
  • Heidelberg Fieni. Vibrations before intervention: 35 mm/s. After intervention 5 mm/s, in April 2013.
  • Cement Tasek (Malaysia). Kiln speed before intervention 2.9 tr/min. After intervention 4.2 tr/min. Clinker output increase of 900 tonnes per day, in August 2015

Interventions which minimize stop times

NOVEXA ensures a ring refurbishing in an average of 3 days (refurbishing times can vary from 2 to 5 days depending on the defect and the number of staff required daily).

Our reduced intervention times are a substantial way to make savings as they prevent production losses related to equipment stoppages.

Spare parts accuracy control is planned after each on-site reprofiling intervention.
Upon completion of the intervention, a statement is signed by both our companies

Our customers are satisfied

A satisfaction questionnaire is sent to customers
The questions are articulated around:

  • Technical satisfaction (planning, implementation, deadline)
  • Results in line with objectives
  • Behavior of our teams
  • Compliance with safety rules
  • Commercial Reactivity

We get a general average between 85 and 95 out of 100
Our goal is a minimum of 80.


  • 2-to-5 days intervention time
  • 0,07 mm (precision) similar to that of a new girth gear
  • 100 % satisfaction thanks to our 5-step control
Crack repair on kiln

After finding a crack on 60% of the tire width, the French cement-manufacturer decided to limit the risk by choosing an on-site repair.
Ultrasound analysis with detection.

Contact us

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Enquire with our experts

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