The dynamic load rating of 16.8 kN characterises this bearing. The static load rating is 7.8 kN. This variant features reduced radial clearance (C2). Point contact between ball and raceway keeps frictional torque low, which is why this type runs faster and cooler than any other rolling bearing. The deep, closely conforming raceway grooves in the inner and outer ring capture the balls positively, so the bearing takes radial load and moderate axial load in both directions without a second bearing position to oppose it.
Because the ball touches the raceway at a point, friction and heat stay low — the precondition for high speeds and for grease-for-life designs. The limits follow from that same geometry: the small contact area caps load capacity against a roller bearing of equal size, and the bearing tolerates misalignment within narrow limits only, since angular error transfers straight into the raceway grooves.
Seats in shaft and housing must therefore be aligned and geometrically accurate; where shaft deflection is expected, a self-aligning type belongs in that position. The open version leaves sealing, initial filling and relubrication to the surrounding design, while keeping the rolling chamber accessible for a directed supply of lubricant. Rings and rolling elements are made of through-hardened standard bearing steel.
The reduced radial clearance raises guiding accuracy and is intended for positions that run closely guided and are thermally lightly loaded.
ManufacturerSKF
Bearing typeDeep-groove ball bearings
Bore d20 mm
Outer Ø D52 mm
Width B15 mm
Dyn. load C16.8 kN
Stat. load C₀7.8 kN
Fatigue limit Pu0.335 kN
Weight0.139 kg
Sealsnone (open bearing)
Clearanceradial internal clearance smaller than normal
Cagepressed steel cage
Materialstandard bearing steel
Tolerancetolerance class P0/PN (ABEC 1)
Shaft shoulder dₐ27–30.4 mm
Housing shoulder Dₐ41.6–45 mm
Bore typecylindrical bore
€9.46/ pc€12.59−25 %
incl. VAT, plus shipping · price drops with quantity
Lowest price in the 30 days before the reduction: €12.59
In stock
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QtyUnit priceDisc.
1 – 4€9.46—
5 – 9€9.18−3 %
10 – 24€8.99−5 %
25 – 49€8.71−8 %
50 – 99€8.52−10 %
4 more for −3% volume discount
From 100 pcs: price and lead time on request – subject to review.
Total (1 pc)€9.46
SKF 6304/C2 Kugellager (20x52x15)
— 20 x 52 x 15 mm
Response within 4 business hours
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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.
