5206SCLLM bearing: complete specifications & equivalents
The 5206SCLLM is a ISO 15 radial bearing sized 30 x 62 x 23.8 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 30 mm |
| Outer diameter D | 62 mm |
| Width B | 23.8 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 25.2 kN |
| Basic static load rating C0 | 18.2 kN |
| Fatigue load limit Pu | 1.1 kN |
| Limiting speed (mechanical) | 7100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 300 g |
| Manufacturer designation | NTN 5206SCLLM |
| 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 | 1.181 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.937 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 16 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) | 7 of 18 |
| Bore above smallest 5200S-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 5206SCLLM | 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 5206SCLLM model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 5206SCLLM appears as a medium-duty 5200S double-row family bearing of 30 mm bore, 62 mm outside diameter and 23.8 mm width. The designation breaks down as 52 is the double-row dimension series (medium-duty 5200S double-row family); 06 encodes the 30 mm bore (bore code x 5), and CLLM marks the SC internal design with non-contact rubber seals on both sides. The radial section height here is 16.0 mm, and the catalogue couples that with C 25.2 kN / C0 18.2 kN. Against a deep-groove bearing of the same 30 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
- industrial pump and blower impeller shafts
- gearbox input shafts under helical-gear thrust
- electric motor shafts with axial locating duty
- conveyor drive and tension-drum 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
- loss of preload after housing-fret or shaft creep, leaving the pair loose — ball skidding, cage rattle and a falling natural frequency follow
- machined-cage land scoring when a high-speed spindle runs past its grease rating and the cage runs dry on its guidance surface
- current-erosion pitting on VFD-driven motor shafts, first visible as a grey frosted band across both raceways
- lubricant starvation scoring at the ball/raceway contact when grease volume or relubrication interval is guessed instead of calculated
Selection pitfalls — read before you substitute
- In this size class the common miss is lubrication interval, not fit — a 30 mm spindle at the catalogue speeds needs a calculated relubrication plan, not a calendar one.
- Sealed LLM non-contact-seal executions are grease-for-life: there is no relubrication path, so the grease life calculation replaces the relubrication plan.
- 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.
- If the application vibrates at standstill (transport, idle machine next to a running line), specify protection: the contact ellipse of a preloaded bearing false-brinells faster than a loose one.
- 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 25.2/18.2 kN ratings and 1.1 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 5206SCLLM; 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 5206SCLLM?
5206SCLLM is a sealed double-row angular contact ball bearing to ISO 15: 30 mm bore, 62 mm outside diameter, 23.8 mm width (1.181 x 2.441 x 0.937 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 25.2 kN, C0 18.2 kN and a 1.1 kN fatigue load limit Pu; the grease limiting speed is 7,100 r/min and the oil rating 9,500 r/min; mass about 300 g.
How is the 5206SCLLM designation structured?
52 is the double-row dimension series (medium-duty 5200S double-row family); 06 encodes the 30 mm bore (bore code x 5), and CLLM marks the SC internal design with non-contact rubber seals on both sides. The 62 mm OD and 23.8 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 5206SCLLM support?
5206SCLLM is a sealed double-row bearing: thrust in both directions, radial and moment load in one envelope, with non-contact rubber seals that keep the shield-level speed ratings.
What lubrication speeds does NTN print for 5206SCLLM?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 7,100 r/min and the oil rating 9,500 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 5206SCLLM?
The 30/62/23.8 mm envelope is ISO 15 interchangeable, but internal geometry — contact angle, osculation, cage and shoulder details — is maker-specific. Re-verify C 25.2 kN / C0 18.2 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.