The mounting dimensions are 20x42x12 mm and the weight is 0.068 kg; technical details beyond these are shown in the specification table. What does not bear does not wear — the barrier effect of this version stays largely unchanged over the operating period, whereas a bearing lip weakens with the operating hours. The non-contact seal consists of an elastomeric sealing body on a sheet-metal insert, fixed in the outer ring, whose contour follows the shoulder or groove of the inner ring down to a narrow distance without touching it.
The difference from a shield lies less in the principle than in what can be realised: an elastomeric body can be moulded and guided more closely than a sheet-metal part, so the remaining passage cross-section comes out smaller and the grease charge is better retained in the rolling chamber. The difference from a contact version, by contrast, is fundamental: without contact pressure no load-independent frictional torque arises, no additional heat source at the inner ring and no wear point, which is why the permissible speed stays close to that of the open form and the barrier effect does not decline over the operating period through lip wear.
The limit of this version follows from the same geometry: a gap, however closely it may be guided, does not hold back liquid permanently, so for flushed or continuously wetted positions a contact version or an upstream seal in the design is to be provided. The grease charge is included in the delivered condition and dimensioned for the service life; its ageing at the actual operating temperature is frequently the limiting quantity at moderate load.
Normal radial clearance is matched to one interference-fitted ring and a moderate temperature difference between the rings, whereby the seal itself makes no contribution to the warming and therefore does not enter the consideration of the residual clearance. Through-hardened standard bearing steel sets the temperature and load frame of the rings; the temperature limit of the sealing material is to be taken from the designation.
ManufacturerSNR
Bearing typeDeep-groove ball bearings
Bore d20 mm
Outer Ø D42 mm
Width B12 mm
Dyn. load C9.95 kN(Catalogue value, not verified)
Stat. load C₀5 kN(Catalogue value, not verified)
Reference speed38,000 min⁻¹(Catalogue value, not verified)
Weight0.068 kg
Sealsnon-contact seals on both sides
Clearancenormal radial internal clearance
Cagepressed steel cage
Materialstandard bearing steel
Tolerancetolerance class P0/PN (ABEC 1)
Bore typecylindrical bore
€4.19/ pc
incl. VAT, plus shipping · price drops with quantity
In stock
Typically ready to ship in 1–2 days
In stock · ships via DPD, UPS or Deutsche Post
QtyUnit priceDisc.
1+€4.19—
Total (1 pc)€4.19
SNR 6004 EE Kugellager (20x42x12)
— 20 x 42 x 12 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.
