OTT®

Tensioner & Idler Pulley Bearings

OEM-grade tensioner & idler pulley bearings — supplying assembly plants and aftermarket worldwide.

80+ SKUsCatalog Pages: 34–40
Tensioner & Idler Pulley Bearings

About Tensioner & Idler Pulley Bearings

OTT is a leading tensioner bearing manufacturer in China, supplying precision inner bearings to tensioner pulley assemblers and aftermarket distributors worldwide. Having passed over 500 hours of life testing, OTT tensioner bearings match the quality of imported brands like INA, SKF, and Gates. Our bearings are used inside complete tensioner pulley assemblies for Mercedes-Benz, Fiat, Renault, Peugeot, Toyota, Ford, and 30+ other vehicle brands. Features include high-speed capability (800–1000 RPM), temperature resistance (-20°C to 130°C), glass-fiber reinforced housing option, and steel or plastic housings. Available as bare bearings for assembly plants or as complete tensioner units.

Key Features

  • High-speed rated: 800–1000 RPM
  • Operating temperature: -20°C to 130°C
  • Glass-fiber reinforced plastic housing option
  • Double/triple lip seal for grease retention
  • Vibration dampening design
  • Passed 500+ hour life test — import replacement grade
  • Available as bare bearings or complete pulley assemblies
  • Cross-reference to INA, SKF, Gates, Dayco, Koyo OEM numbers
  • Supplying tensioner assemblers in Turkey, Brazil, Russia, and Middle East

Applications

Automotive enginesTruck enginesTiming belt systemsSerpentine belt systemsTensioner pulley assembly plantsAftermarket distributorsOEM Tier-2 supply

Representative Models

VKM74200 Timing Belt Tensioner

Precision timing belt tensioner with eccentric adjustment mechanism for engine timing systems.

ModelVKM74200
Bore Diameter9 mm
Outer Diameter52 mm
Width25 mm
Base Bearing3203
TypeEccentric tensioner
Request a Quote for VKM74200

6202 Idler Pulley Bearing

Standard idler pulley bearing for serpentine belt systems. Compact design with deep groove ball bearing core.

Model6202
DimensionsΦ15 × Φ35 × 11
Base BearingKN6006
TypeIdler pulley
Request a Quote for 6202

Frequently Asked Questions

What is the role of a tensioner bearing in a car engine?
Tensioner bearings maintain constant belt tension in the accessory drive system, which includes the alternator, water pump, A/C compressor, and power steering pump. Proper tension prevents belt slipping, reduces vibration, and extends belt life.
How do OTT tensioner bearings handle high engine temperatures?
OTT tensioner bearings use glass-fiber reinforced housing materials that maintain dimensional stability up to 130°C. The sealed design retains high-temperature grease, and our precision manufacturing ensures consistent performance under thermal cycling.
Can OTT supply bare tensioner bearings for pulley assembly plants?
Yes. OTT supplies bare inner bearings (6202, 6203, 6006, 6007, 6008 series and custom sizes) to tensioner pulley assembly plants worldwide. We currently supply assemblers in Turkey, Brazil, Russia, and the Middle East who build complete tensioner units for the automotive aftermarket. MOQ starts at 500 pcs per model.
How do OTT tensioner bearings compare to INA, SKF, or Koyo?
OTT tensioner bearings are manufactured to the same dimensional and tolerance standards as INA (Schaeffler), SKF, and Koyo. Our bearings have passed 500+ hours of continuous life testing, reaching import-replacement quality grade. Many tensioner assemblers have switched from Japanese/European brands to OTT while maintaining the same OEM approval from vehicle manufacturers.
What tensioner bearing models does OTT offer for Mercedes-Benz vehicles?
OTT offers a complete range of tensioner bearings for Mercedes-Benz applications, including timing belt tensioners and serpentine belt idlers. Models are cross-referenced to INA and SKF part numbers. Contact us with your Mercedes OEM part number for exact cross-reference.
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