5305SCLLD bearing: complete specifications & equivalents
The 5305SCLLD is a ISO 15 radial bearing sized 25 x 62 x 25.4 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 | 25 mm |
| Outer diameter D | 62 mm |
| Width B | 25.4 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) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 360 g |
| Manufacturer designation | NTN 5305SCLLD |
| 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 & 5300S-series range
| Bore d | 0.984 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 1 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 18.5 mm |
| Smallest bore in 5300S-series | 15 mm |
| Largest outer diameter in 5300S-series | 150 mm |
| Width range across 5300S-series | 19–63.5 mm |
| Bore position in 5300S-series (smallest first) | 4 of 13 |
| Bore above smallest 5300S-series size | 10 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 5305SCLLD model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 5305SCLLD appears as a heavy-duty 5300S double-row family bearing of 25 mm bore, 62 mm outside diameter and 25.4 mm width. NTN builds the number from 53 is the double-row dimension series (heavy-duty 5300S double-row family), then 05 encodes the 25 mm bore (bore code x 5), and CLLD marks the SC internal design with contact rubber seals on both sides. NTN prints 25.2 kN dynamic and 18.2 kN static for this size and a 1.1 kN fatigue load limit Pu. Choose the heavy-duty 5300S double-row family when the shaft needs a stiff locating support and the axial component is known to act mostly one way. A 25 mm shaft typically takes a k5/m5 fit for rotating inner-ring load; keep the housing bore to G6/H6 class so the contact geometry is not distorted.
Typical equipment & failure modes
Common applications
- high-speed router, grinder and woodworking spindles
- small pump and compressor shafts with combined load
- servo and stepper motor shafts with axial preload
- bicycle and motorcycle wheel and steering positions
Known failure patterns
- impact brinelling dents on the 30 deg contact path after a shaft-side hammer blow during mounting, because axial shock travels straight through the contact angle
- loss of preload after housing-fret or shaft creep, leaving the pair loose — ball skidding, cage rattle and a falling natural frequency follow
- resin-cage cracking on the 7900-series sizes after hot, dry running or solvent attack on the polymer
- flaking that starts at the raceway shoulder on the thrust-loaded side when axial load repeatedly exceeds the design share
- flaking that starts at the raceway shoulder on the thrust-loaded side when axial load repeatedly exceeds the design share
Selection pitfalls — read before you substitute
- At 25 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 LLD contact-seal executions are grease-for-life: there is no relubrication path, so the grease life calculation replaces the relubrication plan.
- 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.
- Never use a four-point or double-row bearing as a like-for-like swap for a single 5305SCLLD without re-checking axial float, heat and housing width — the kinematics differ.
- Never use a four-point or double-row bearing as a like-for-like swap for a single 5305SCLLD without re-checking axial float, heat and housing width — the kinematics differ.
- The 25.2/18.2 kN ratings and 1.1 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 5305SCLLD; 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 5305SCLLD?
5305SCLLD is a sealed double-row angular contact ball bearing to ISO 15: 25 mm bore, 62 mm outside diameter, 25.4 mm width (0.984 x 2.441 x 1 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 6,300 r/min and no oil rating is printed for this execution; mass about 360 g.
How is the 5305SCLLD designation structured?
53 is the double-row dimension series (heavy-duty 5300S double-row family); 05 encodes the 25 mm bore (bore code x 5), and CLLD marks the SC internal design with contact rubber seals on both sides. The 62 mm OD and 25.4 mm width follow the ISO 15 boundary-dimension plan for that series.
Which axial direction does 5305SCLLD support?
5305SCLLD is a sealed double-row bearing: thrust in both directions, radial and moment load in one envelope, with contact rubber seals (grease-lubricated, no oil speed rating).
What lubrication speeds does NTN print for 5305SCLLD?
Per NTN Ball and Roller Bearings CAT.No.2203E, the grease limiting speed is 6,300 r/min and no oil rating is printed for this execution. 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 5305SCLLD?
The 25/62/25.4 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.