This NTN bearing measures 25x52x15 mm and weighs 0.14 kg; the specification table carries the supplementary technical details. This variant features greatly increased radial clearance (C4). Strongly increased clearance (C4) usually points to an interference-fitted outer ring — and it is in that very ring that the shields sit in their groove.
In this combination the clearance class and the design belong together more closely than it first appears. Strongly increased clearance (C4) is selected when not only the inner ring is expanded but the outer ring is also compressed in a tight housing bore, or when a high temperature gradient is added; both shares reach the rolling chamber at the same time and leave too little of the normal clearance.
At the same time the outer ring is the component in whose groove the shields are fixed. An interference fit large enough to raise a clearance class deforms that ring measurably, and the deformation also reaches the shield seat: the gap to the inner ring can change unevenly in the process, in an unfavourable case as far as contact. Where the housing fit lies in this range, free running is to be checked after assembly and the fitting force introduced solely through the ring that carries the interference fit.
If the shield is undamaged, its contribution remains unchanged: a non-contacting gap that keeps the grease charge in the bearing and coarse contamination out, without contributing a frictional torque or a heat source, and which does not hold back liquid or fine dust. At low radial load the wide clearance has to be taken into account, because the load zone becomes narrow and the load-free part of the ball set can slide without sufficient minimum load.
The grease charge is enclosed and dimensioned for the service life; relubrication is not foreseen. Through-hardened standard bearing steel sets the frame for hardness and dimensional accuracy.
ManufacturerNTN
Bearing typeDeep-groove ball bearings
Bore d25 mm
Outer Ø D52 mm
Width B15 mm
Dyn. load C15.5 kN(Catalogue value, not verified)
Stat. load C₀7.85 kN(Catalogue value, not verified)
Limiting speed15,000 min⁻¹(Catalogue value, not verified)
Reference speed13,000 min⁻¹(Catalogue value, not verified)
Weight0.14 kg
Sealsshields on both sides
Clearanceradial internal clearance much greater than normal
Cagepressed steel cage
Materialstandard bearing steel
Tolerancetolerance class P0/PN (ABEC 1)
Bore typecylindrical bore
€8.63/ 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€8.63—
5 – 9€8.37−3 %
10 – 24€8.20−5 %
25 – 49€7.94−8 %
50 – 99€7.76−10 %
4 more for −3% volume discount
From 100 pcs: price and lead time on request – subject to review.
Total (1 pc)€8.63
NTN 6205 ZZC4/5K Kugellager (25x52x15)
— 25 x 52 x 15 mm
Response within 4 business hours
✓Free shipping over €100 · 14-day returns
✓Purchase on invoice – first order paid before dispatch, then 14-day terms for approved business customers
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.
