3909

Tier-one manufacturer — brand supplied may vary ✓ Bore checked against the ISO table
$200.00 USD
$200.00 USD
Sale Sold out
Bore45 mm 1.7717 in
Outside dia.85 mm 3.3465 in
Width28 mm 1.1024 in
TypeDouble row angular contact ball bearing
SealingOpen
ClearanceNormal
Ships from US partner stock — flat-rate shipping, calculated by weight at checkout
  • 3909 Thrust Ball Bearings
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Image is for illustration purposes only.

What 3909 means

CodePositionMeaning
3 Type Angular contact ball bearing, double row
9 Diameter series Diameter series 9 (very thin)
09 Bore Bore code 09 × 5 = 45 mm

Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.

3909 specifications

Specification Metric Inch Basis
Bore (d) 45 mm 1.7717 in ISO table for this designation, confirmed by supplier data
Outside diameter (D) 85 mm 3.3465 in Supplier catalogue listing
Width (B) 28 mm 1.1024 in Supplier catalogue listing
Bearing type Double row angular contact ball bearing Stated by the designation
Seals / shields Open (no seals or shields) Stated by the designation
Internal clearance Normal (CN): no clearance code in the designation Stated by the designation
Tolerance class Normal (ISO P0 / ABEC 1): no tolerance-class code Stated by the designation

3909 is a double row angular contact ball bearing, 45 mm bore × 85 mm OD × 28 mm wide (1.7717 × 3.3465 × 1.1024 in).

The 3909 is a thrust ball bearing designed to support axial loads in one direction. Thrust ball bearings consist of two washers (shaft and housing washers) with a ball and cage assembly between them, allowing for efficient transmission of thrust loads between rotating and stationary components.

Related sizes & variants

  • 51309 · 45×85×28 mm · Open
  • 2910 · 50×74×18 mm · Open
  • 2913 · 65×90×20 mm · Open
  • 2914 · 70×95×20 mm · Open
  • 3910 · 50×92×31 mm · Open
  • 51100 · 10×24×9 mm · Open
  • 51102 · 15×28×9 mm · Open