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Molykote - Speciality lubricants for the wind energy industry

Publié le 2021-06-07

Correct tightening and prevention of corrosion will prevent bolt failure on wind turbines.

Help improve the quality, safety and reliability of the joint through correct tightening. Prevent corrosion, avoid bolt failure and reduce maintenance costs. Use Molykote® Smart Lubrication™ products to ensure strong threaded connections on :

  • Nacelle frame joints
  • Front and rear main journal bearings
  • Trunnion bearing mounting bolts
  • Gearbox, drives and coolers
  • Slewing ring mounting bolts
  • Tower segment flange bolts
  • Foundation Anchor Bolts

The safety and reliability of wind turbines depends on the strength of the threaded connections.

Common problems with threaded connections :

  • Difficulty in tightening and damage to threads.
  • Uneven or low clamping force.
  • Broken bolts and base parts (flanges or plates).
  • Difficult disassembly and destroyed threads

Good bolt and fastener lubricants can help solve problems and increase reliability by reducing the effects of root causes, including

  • Seizure and abrasive wear
  • Uneven coefficient of friction
  • Frictional corrosion
  • Substrate embrittlement failures due to the use of low melting point metals such as lead, tin and copper
  • Stress corrosion cracking

Good lubrication can help reduce clamping resistance, prevent damage and improve clamping force on thousands of different sized threaded connections on wind turbines.

Découvrez nos solutions pour les raccords filetés

Tighten all assembly bolts to the required tension with the correct torque: Roughness of the threads creates uneven friction and incorrect tightening of the bolts during installation. Lubricate the threads with Molykote pastes to achieve a consistent low coefficient of friction, which ensures correct tightening and tensioning of all wind turbine assembly bolts.

Protect threaded assemblies to extend their life: Equipment bolts and fittings must remain invulnerable to heat, cold, pollution, rain, snow and even salt spray. Apply Molykote pastes to help provide threaded bolts with increased, long-lasting protection against corrosion and galling.

Helps make disassembly of threaded assemblies easier: Corrosion, sticking and galling make disassembly difficult after long outdoor service. Use Molykote brand pastes for bolt lubrication, protection against fretting corrosion and easy disassembly without damage.

Brake system lubrication

ApplicationDesign requirementMolykote® Solution(s) Molykote® Product Benefits
Brake system
(Shrink disk)
Dry lubrication for outside Molykote® 
D-321-R
Dry lubrication (MoS2) Does not accumulate dust and prevents seizing
Screws and bolts Corrosion protection + assembly assistance. Molykote® 
G-Rapid Plus
Complementary to Molykote® D-321-R, prevents fretting and seizing. Low friction coefficient (µ thread = 0.10 / µ head = 0.06).

Corrosion protection / assembly assistance

ApplicationDesign requirementMolykote® Solution(s)Molykote® Product Benefits
Assembly assistance Dry lubrication for the outside Molykote® 
D-321-R
Dry lubrication (MoS2) Does not accumulate dust and prevents seizing
Assembly assistance + Corrosion protection Corrosion protection (orientation brake pads) + assembly assistance Molykote® 
3402 C Lead Free
Dry lubrication (MoS2). Good protection against corrosion. Good protection against chatter and seizure.



Lubrication and protection of screwed assemblies

ApplicationDesign requirementMolykote® Solution(s)Molykote® Product Benefits
Hub assembly/generator shaft 
Blade assembly/hub

Corrosion protection
Protection against chattering + seizing
Molykote® 
G-Rapid Plus
Dry lubrication (MoS2) Good protection against chatter and seizure. High load capacity. 

Molykote® 
G-n Plus

Prevents fretting, chattering, seizing and scoring. Facilitates disassembly

Molykote® 
1000

Paste for copper screws. Lead and nickel free, high load capacity. Constant coefficient of friction even after several assembly/disassembly operations.
Mast assembly Corrosion protection + assembly assistance. Molykote® 
1000
Paste for copper screws. Lead and nickel free, high load capacity. Constant coefficient of friction even after several assembly/disassembly operations.
Molykote® 
D-321-R
Dry lubrication (Molybdenum disulfide MoS2) Good protection against chatter and seizure. Does not accumulate dust.
Molykote® 
7400
Dry coating (MoS2) Water based. Low coefficient of friction
Generator screws Protection against corrosion and chatter Molykote® 
G-Rapid Plus
Complementary to Molykote® D-321-R, prevents fretting and seizing. Low friction coefficient (µ thread = 0.10 / µ head = 0.06).

Lubrication of bearings / crowns

ApplicationDesign requirementMolykote® Solution(s)Molykote® Product Benefits
Lubrication of blade slewing rings, nacelle Long life lubrication
Corrosion protection
Molykote® 
Longterm 2plus
Extreme pressure grease, allows long term lubrication, has a very good adhesion. Protects against corrosion.
Lubrication of the generator bearings


Plus d'info :

Needs information about the brand of industrial lubricants Molykote®? Contact our technical service by phone to +33 426 680 680 or fill our Contact form.

Download our selector guide dedicated to the wind energies :

Source : DGE-Europe