241-710B bearing: complete specifications & equivalents
The 241-710B is a ISO 15 radial bearing sized 710 x 1150 x 438 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 710 mm |
| Outer diameter D | 1150 mm |
| Width B | 438 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 16100 kN |
| Basic static load rating C0 | 32000 kN |
| Fatigue load limit Pu | 1190 kN |
| Limiting speed (mechanical) | 220 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1800000 g |
| Manufacturer designation | NTN 241/710B |
| 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 | 27.953 in |
|---|---|
| Outer diameter D | 45.276 in |
| Width B | 17.244 in |
| ISO bore code | 41 |
| Radial section height (D−d)/2 | 220 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) | 32 of 32 |
| Bore above smallest 24100-series size | 610 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 241-710BK30 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 24100-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 241-710BK30 (K/K30 sleeve or tapered-seat mounting). 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 241-710B model number is decoded
241/710B is an NTN double-row spherical roller bearing: two rows of symmetric rollers on a sphered outer raceway, 710×1150×438 mm to ISO 15, with pressed-steel cage (standard execution). Reading the full code: the number gives the 710×1150 mm envelope, — names the cage/capacity execution, no bore suffix means cylindrical bore for a direct shaft seat, and plain outer ring (no D1/W33 groove) completes the order number. Suffix reading on 241/710B: the bare number is the standard open execution; B marks the standard large-bore internal design on slash-size 230–232 series; quote the full code because each suffix is a distinct article. Catalogue mass 1800000 g (1800.00 kg) for the 710×1150×438 mm execution includes the basic cage and both roller rows; shaft and housing shoulders must support that ring squarely. Fillet radii on shaft and housing must clear the ring chamfers of the 438 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
Typical equipment & failure modes
Common applications
- large SAG/ball-mill trunnion and pinion shafts
- heavy vibrating screens and grizzly feeders
- offshore and marine propulsion shaftlines
- large wind-turbine main-shaft arrangements
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- roller-end smearing during skidding starts under light load and high viscosity grease
- rolling-contact fatigue after the catalogue L10 life at the actual load
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
Selection pitfalls — read before you substitute
- At 710 mm bore 241/710B 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.
- The cylindrical-bore 241/710B and its tapered-bore counterpart 241/710BK30 share envelope and ratings but not mounting: do not order the K variant unless the drawing specifies a sleeve or tapered seat.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 710 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- Never substitute 241/710B by envelope alone: the 32000 kN C0 and 1190 kN Pu are specific to the NTN basic execution, and vibrating duty depends heavily on cage identity.
- The two roller rows must share load equally — a tilted spacer or unequal abutment on the 438 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- The 16100/32000 kN ratings, 1190 kN Pu and 1800000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 241/710B (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 241/710B?
241/710B is an NTN double-row spherical roller bearing to ISO 15: 710 mm bore, 1150 mm OD and 438 mm width (27.953 × 45.276 × 17.244 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 16100 kN, C0 32000 kN, Pu 1190 kN, grease limiting speed 220 r/min, oil 280 r/min, mass about 1800000 g. It is open, with pressed-steel cage (standard execution).
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
241/710B has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 241/710BK30 (K = 1:12, or K30 = 1:30 on the wide series), intended for adapter/withdrawal-sleeve mounting.
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. 241/710B is the basic execution.
What do D1 and W33 mean on 241/710B?
241/710B 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 241/710B 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 — 16100 kN C / 32000 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.