Coatings - V2



Extend Product Life
and Reduce Downtime.

From corrosion resistance to wear protection, surface treatment helps limit bearing and component damage in a diverse range of applications. Timken coatings meet the high standards for quality and performance that you expect from Timken and our expert tribology team. Simplify your supply chain process and improve your bottom line with a single source supplier for products and coatings.

Timken Coatings

10 Coating Optionsfor Diverse Applications

  • Agriculture
  • Automotive
  • Cement
  • Civil Aerospace
  • Commercial Vehicles
  • Construction
  • Defense
  • Energy
  • Food and Beverage
  • Industrial Equipment & Machinery
  • Metals
  • Mining
  • Outdoor Power Equipment
  • Rail
How Bearing Coatings Can Bring Big Savings to Cement Plants
Case Study

How Bearing Coatings Can Bring Big Savings to Cement Plants

View Case Study

Timken Coating Portfolio

Coating Product Surface Key Features Applications
ES200 Tapered roller bearings, cross (XR) roller bearings Roller ends Oil out, adhesive wear mitigation Aerospace, off-highway, wind
ES300 Tapered roller bearings, pump shaft Roller ends, sliding surfaces Wear resistance, oil out, adhesive wear mitigation Aerospace, fuel injector pins, automatic transmission pumps
ES302 Cylindrical roller bearings, spherical roller bearings, tapered roller bearings, thrust bearings Roller body and ends Wear resistance, debris resistance, oil out Wind, oil and gas, mining trucks, gudgeons, axle pinions, pump drives
AquaSpexx® Tapered roller bearings Inner and outer rings (all surfaces) Corrosion, fretting, and galling resistance Boat trailer bearings, rolling mills, circuit breakers
Thin Dense Chrome (TDC) Tapered roller bearings, spherical roller bearings, SurvivorTM series ball bearing housed units and wide inner ring ball bearing, inner ring bores, housed units Inner and outer rings (all surfaces) Corrosion and wear resistance Conveyors, ovens, fans, blowers, aerospace
Black Oxide Cylindrical roller bearings, spherical roller bearings, tapered roller bearings Inner and outer rings and rollers (all surfaces Retains lubricant and increases smear-resistance especially during run-in periods Wind, industrial, aerospace
Zinc Phosphate Tapered roller bearings, backing rings, end caps, seal cases Inner and outer rings, auxiliary components (all surfaces) Lubrication during fitting; corrosion, galling and wear resistance Rail
E-Coat Timken® Type E tapered roller bearing housed unit, rail ancillary components, backing rings Auxiliary components (all surfaces) Corrosion resistance Used on all Type E housings
Powder Coat Housings for ball housed units (Timken® Fafnir® and U series), Timken® spherical roller bearing solid block housed units (excludes bearing surface) Cast iron housing surface, steel locking collars Corrosion resistance Conveyors, ovens, fans, blowers
Dielectric Coat TS/TSF outer ring O.D., ball bearings, cylindrical roller bearings O.D. surfaces in contact with housings and shafts Electric insulation Rail traction motors, electric motor and generator bearings
Coating Technique Coating Thickness (nominal value) Chemistry Nanohardness (GPa)
ES200 Reactive Physical Vapor Deposition 1-2 µm TiC/a-C:H 12 ± 1
ES300 Reactive Physical Vapor Deposition 2-3 µm WC/a-C:H 12.5 ± 0.8
ES302 Reactive Physical Vapor Deposition 1-2 µm WC/a-C:H 13 +/- 1.5
AquaSpexx® Electrodeposition 8-10 µm Zn-Ni 4.4 ± 0.3
Thin Dense Chrome (TDC) Electrodeposition 1-1.5 µm Cr 9.5 ± 2
Black Oxide Alkaline bath 1-2 µm Fe3O4 2.6 ± 0.1
Zinc Phosphate Phosphate bath 1-2 µm Zn-Phosphate 2.6 ±1.1
E-Coat Cathodic epoxy 15-20 µm Epoxy N/A
Powder Coat Electric-static powder coating 90-100 µm Epoxy mixed with ceramic N/A
Dielectric Coat Plasma spray 220-280 µm Alumina based dielectric coat N/A

Timken Coating Portfolio

Benefit from superior wear resistance and friction reduction with the industry-leading line of PVD (Physical Vapor Deposition) hard coatings that won the Engineering Materials Achievement Award from ASM International. These PVD coatings are deposited at temperatures between 150-160°C and designed to operate at temperatures up to 220°C.

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Conversion coatings combine exceptional wear and corrosion resistance with an ability to withstand false brinelling.

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Comparison Data and Test Results

Rigorous testing measures how each coating type compares in relation to corrosion resistance, hardness and friction. Each Timken coating is uniquely adapted to the needs and operating conditions of the application.

Polarization and Tafel curves

Corrosion resistance compared to uncoated baseline product:

Baseline 1
TDC 67x
AquaSpexx® 10x
Zinc Phosphate 6x
ES200 1.4x
ES300 2.3x
ES302 1.9x
Baseline >0.6
ES200 0.26 ± 0.01
ES302 0.29 ± 0.02
Zinc Phosphate 0.17 ± 0.01
Black Oxide 0.51 ± 0.04
TDC 0.49 ± 0.06
AquaSpexx 0.72 ± 0.12


A high H/E ratio implies the coating is hard and tough. A low H/E ratio implies the coating is hard and brittle.

Baseline 3 x 10-2
Zinc Phosphate 2 x 10-2
Black Oxide 4 x 10-2
AquaSpexx 3 x 10-2
TDC 4 x 10-2
ES200 10 x 10-2
ES300 9 x 10-2
ES302 9 x 10-2

Making A Difference

Find out how Timken coatings add value to your business. Our custom surface treatment technology solutions combat wear and improve component durability to save you time and money. Contact your Timken sales representative today.

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