The mounting dimensions are 45x85x19 mm and the weight is 0.4 kg; technical details beyond these are shown in the specification table. This variant features increased radial clearance (C3). Gearbox and drive arrangements demand both: protection against coarse ingress from outside and free access for the lubricant from inside. This version combines a directional design with an allowance in clearance, and both features act on the same process: the temperature in the rolling contact.
On the closed side a non-contacting shield holds back coarse ingress without contributing a frictional torque; on the open side lubricant from the surrounding space can reach the rolling contact and carry frictional heat away with it. It is precisely this passage that distinguishes the version from a doubly closed, grease-filled variant: the heat leaves the bearing not only through the rings but also with the lubricant, and that changes the temperature gradient between inner and outer ring.
Increased clearance (C3) nevertheless holds an allowance ready, because at such positions several shares typically come together: the interference fit on the shaft, a heat flow supplied from outside and an ambient temperature above that of a free-standing drive. What governs here too is the residual clearance in the warm running state, which should lead neither to a preloaded rolling contact nor to an unnecessarily narrow load zone.
The asymmetry of the design also implies a mounting instruction: the shielded side belongs to the loaded surroundings, the open side to the interior supplied with lubricant, and this assignment is to be recorded in the assembly documents. The gap of the shield holds back neither liquid nor fine dust; where these are to be expected, the sealing belongs in the surrounding design.
Through-hardened standard bearing steel sets the frame for hardness, dimensional accuracy and the ratings listed in the catalogue. Metal shield on one side — Dimensional/form-fit equivalent — verify suffix-level details for critical applications. Matching suffixes are also listed by SKF (Z), NSK (Z), NTN (Z) and NACHI (ZE).
ManufacturerFAG
Bearing typeDeep-groove ball bearings
Bore d45 mm
Outer Ø D85 mm
Width B19 mm
Dyn. load C33.5 kN(Catalogue value, not verified)
Stat. load C₀20.3 kN(Catalogue value, not verified)
Weight0.4 kg
Sealsshield on one side
Clearanceradial internal clearance greater than normal
Cagepressed steel cage
Materialstandard bearing steel
Tolerancetolerance class P6 (ABEC 3)
Bore typecylindrical bore
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FAG 6209-C-Z-C3 (-Z-C3) Kugellager (45x85x19)
— 45 x 85 x 19 mm
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Same dimensions means the same bearing type and matching main dimensions (d × D × B). Sealing, cage, internal clearance and execution (e.g. material, precision, grease fill) are encoded in the suffix and may differ — please check before ordering. Equivalent additionally means the same sealing, internal clearance and tolerance class; the cage and other suffix features (e.g. lubrication groove) may differ.
