5204SCZZ bearing: complete specifications & equivalents
The 5204SCZZ is a ISO 15 radial bearing sized 20 x 47 x 20.6 mm (bore x OD x width) with ZZ sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 20 mm |
| Outer diameter D | 47 mm |
| Width B | 20.6 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 15.9 kN |
| Basic static load rating C0 | 10.7 kN |
| Fatigue load limit Pu | 0.64 kN |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160 g |
| Manufacturer designation | NTN 5204SCZZ |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & 5200S-series range
| Bore d | 0.787 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 0.811 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 5200S-series | 10 mm |
| Largest outer diameter in 5200S-series | 150 mm |
| Width range across 5200S-series | 14.3–49.2 mm |
| Bore position in 5200S-series (smallest first) | 5 of 18 |
| Bore above smallest 5200S-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 5204SCZZ | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 5204SCZZ model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 5204SCZZ appears as a medium-duty 5200S double-row family bearing of 20 mm bore, 47 mm outside diameter and 20.6 mm width. Two fields make up the code — 52 is the double-row dimension series (medium-duty 5200S double-row family) and 04 encodes the 20 mm bore (bore code x 5), and CZZ marks the double-row SC internal design with pressed-steel shields on both sides. The radial section height here is 13.5 mm, and the catalogue couples that with C 15.9 kN / C0 10.7 kN. Against a deep-groove bearing of the same 20 mm bore, this bearing trades some pure-radial comfort for real one-direction thrust capacity and higher running accuracy. Set preload or end-play with the pair as a unit and lock the adjustment; a single angular-contact bearing cannot run free like a deep-groove one.
Typical equipment & failure modes
Common applications
- servo and stepper motor shafts with axial preload
- bicycle and motorcycle wheel and steering positions
- small gearbox pinion shafts with helical gears
- precision instrument and encoder support shafts
Known failure patterns
- false brinelling on the raceway contact ellipses when a preloaded spindle sits vibrating at standstill — visible as evenly spaced flute-like wear at ball pitch
- thermal runaway from excessive preload: the pair runs hot, grease darkens and the contact ellipse spreads until the raceways smear
- machined-cage land scoring when a high-speed spindle runs past its grease rating and the cage runs dry on its guidance surface
- contamination-induced denting — hard particles rolled into the contact ellipse become the initiation points for surface fatigue
- contamination-induced denting — hard particles rolled into the contact ellipse become the initiation points for surface fatigue
Selection pitfalls — read before you substitute
- At 20 mm bore the rings are thin-sectioned: press force must go through the ring being fitted, never through the balls, or the first damage is already in the raceway before the machine runs.
- Sealed ZZ shielded executions are grease-for-life: there is no relubrication path, so the grease life calculation replaces the relubrication plan.
- The C0 of 10.7 kN is a static rating, not a permissible running thrust — sizing continuous axial load from C0 alone is a recurring drawing-office error.
- A single-row angular contact left loose on the shaft to "help assembly" will fret the seat: the contact angle keeps driving the ring axially under load.
- A single-row angular contact left loose on the shaft to "help assembly" will fret the seat: the contact angle keeps driving the ring axially under load.
- The 15.9/10.7 kN ratings and 0.64 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 5204SCZZ; internal geometry legitimately differs between manufacturers, so re-verify ratings, contact angle and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 5204SCZZ?
5204SCZZ is a sealed double-row angular contact ball bearing to ISO 15: 20 mm bore, 47 mm outside diameter, 20.6 mm width (0.787 x 1.85 x 0.811 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 15.9 kN, C0 10.7 kN and a 0.64 kN fatigue load limit Pu; the grease limiting speed is 10,000 r/min and the oil rating 13,000 r/min; mass about 160 g.
How is the 5204SCZZ designation structured?
52 is the double-row dimension series (medium-duty 5200S double-row family); 04 encodes the 20 mm bore (bore code x 5), and CZZ marks the double-row SC internal design with pressed-steel shields on both sides. The 47 mm OD and 20.6 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 5204SCZZ support?
5204SCZZ is a sealed double-row bearing: thrust in both directions, radial and moment load in one envelope, with pressed-steel shields that keep the open-bearing speed ratings.
What lubrication speeds does NTN print for 5204SCZZ?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 10,000 r/min and the oil rating 13,000 r/min. These are catalogue ceilings for a correctly mounted bearing with the stated lubricant; preload, fill quantity, ambient heat and paired arrangements all move the real limit.
What should be checked before substituting another make for 5204SCZZ?
The 20/47/20.6 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 15.9 kN / C0 10.7 kN, the speed figures, contact angle and suffix meaning against the donor catalogue before swapping on a rated drive.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.