24196BK30 bearing: complete specifications & equivalents
The 24196BK30 is a ISO 15 radial bearing sized 480 x 790 x 308 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 480 mm |
| Outer diameter D | 790 mm |
| Width B | 308 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 8250 kN |
| Basic static load rating C0 | 15300 kN |
| Fatigue load limit Pu | 860 kN |
| Limiting speed (mechanical) | 350 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 600000 g |
| Manufacturer designation | NTN 24196BK30 |
| 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 & 24100-series range
| Bore d | 18.898 in |
|---|---|
| Outer diameter D | 31.102 in |
| Width B | 12.126 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 155 mm |
| Smallest bore in 24100-series | 100 mm |
| Largest outer diameter in 24100-series | 1150 mm |
| Width range across 24100-series | 65–438 mm |
| Bore position in 24100-series (smallest first) | 25 of 32 |
| Bore above smallest 24100-series size | 380 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24196B | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 24100-series envelope, cage and ratings; this is the tapered-bore execution (K30, 1:30) of the cylindrical-bore 24196B — mounting (adapter/withdrawal sleeve or tapered seat, drive-up) differs. Verify shaft arrangement. |
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 24196BK30 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 24196BK30 denotes the 480 mm bore spherical roller bearing (8250 kN C / 15300 kN C0) in the 24100 series, the self-aligning choice for heavy combined load. The leading digits are the ISO 15 dimension series (24100 series); the bore code resolves to 480 mm (two-digit code ×5, with the 00–03 exception table), and 790 mm OD / 308 mm width follow the general plan. The 1:30 tapered bore mounts on an adapter/withdrawal sleeve (or tapered seat); drive-up sets the residual radial clearance and fixes the axial position of the 480 mm bore assembly. Catalogue mass 600000 g (600.00 kg) for the 480×790×308 mm execution includes the basic cage and both roller rows; shaft and housing shoulders must support that ring squarely. Never mount 24196BK30 by striking the outer ring through the roller set; drive through ring faces (or the adapter sleeve nut) and support the ring square to avoid brinelling the 790 mm race.
Typical equipment & failure modes
Common applications
- cement-rotary-kiln support and trunnion rolls
- large SAG/ball-mill trunnion and pinion shafts
- heavy vibrating screens and grizzly feeders
- offshore and marine propulsion shaftlines
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- cage damage when a mounting force is applied through the roller set instead of the ring face
- micro-pitting when the EHL film is thinner than the raceway composite roughness
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
- hard-particle indentation through the open arrangement in dusty mining duty
Selection pitfalls — read before you substitute
- At 480 mm bore 24196BK30 is normally mounted on adapter/withdrawal sleeves with hydraulic assistance; follow the NTN drive-up angle or oil-injection procedure — manual nut tightening cannot set the multi-tonne seating correctly.
- Minimum load must be maintained even at rest under vibration: an unloaded 24196BK30 on a stopped screen false-brinells; parking brakes and shaker isolation both matter.
- The D1/W33 groove only helps if the housing has a matching grease passage; mounting a grooved 24196BK30 in a solid block with no port wastes the feature and leaves the centre rows under-lubricated.
- Never substitute 24196BK30 by envelope alone: the 15300 kN C0 and 860 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- Do not confuse EA and EM at the same number: 24196BK30 carries basic; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 480×790 mm envelope is identical.
- The 8250/15300 kN ratings, 860 kN Pu and 600000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 24196BK30 (basic); another maker's same-envelope part revises internal geometry, so re-verify ratings and cage before substitution on vibrating or rated drives.
Frequently asked questions
What are the dimensions and catalogue data of 24196BK30?
24196BK30 is an NTN double-row spherical roller bearing to ISO 15: 480 mm bore, 790 mm OD and 308 mm width (18.898 × 31.102 × 12.126 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 8250 kN, C0 15300 kN, Pu 860 kN, grease limiting speed 350 r/min, oil 450 r/min, mass about 600000 g. It is open, with pressed-steel cage (standard execution) and a 1:30 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K30 denotes a 1:30 tapered bore (the wide 24100 series). 24196BK30 mounts on a matching adapter or withdrawal sleeve on a plain 480 mm shaft and is driven up to a measured radial clearance; the cylindrical-bore counterpart is 24196B.
What do EA and EM mean on NTN spherical roller bearings?
EA is the NTN standard-capacity/high-capacity execution with a pressed sheet-steel window cage; EM is the high-capacity execution with a one-piece machined brass cage. Both use the optimised symmetric-roller design, but cage identity changes mass, speed behaviour and suitability for duties like vibrating screens, so they are separate order numbers. 24196BK30 is the basic execution.
What do D1 and W33 mean on 24196BK30?
24196BK30 is listed without a D1/W33 outer-ring groove in 2203E; lubrication is supplied from the ring sides. D1 (NTN spelling) and W33 add the annular groove plus holes and are ordered as distinct suffixed executions of the same envelope.
How much misalignment and axial load can 24196BK30 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 24100 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 8250 kN C / 15300 kN C0 — but sustained pure axial load is not recommended because it unloads one row.
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.