NU1019 bearing: complete specifications & equivalents
The NU1019 is a ISO 15 radial bearing sized 95 x 145 x 24 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 95 mm |
| Outer diameter D | 145 mm |
| Width B | 24 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 101 kN |
| Basic static load rating C0 | 120 kN |
| Fatigue load limit Pu | 13.9 kN |
| Limiting speed (mechanical) | 4800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1380 g |
| Manufacturer designation | NTN NU1019 |
| 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 & NU1000-series range
| Bore d | 3.74 in |
|---|---|
| Outer diameter D | 5.709 in |
| Width B | 0.945 in |
| ISO bore code | 19 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in NU1000-series | 25 mm |
| Largest outer diameter in NU1000-series | 1090 mm |
| Width range across NU1000-series | 12–150 mm |
| Bore position in NU1000-series (smallest first) | 15 of 47 |
| Bore above smallest NU1000-series size | 70 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NU1019-ML | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 95×145×24 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application 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 NU1019 model number is decoded
The NTN order number NU1019 denotes a 95×145×24 mm (3.74 × 5.709 × 0.945 in) cylindrical roller bearing in the NU1000 family, a pressed sheet-steel cage. Numbering ties NU1019 to its envelope: type code NU, series NU1000, 95 mm bore; the 145×24 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. Line contact between rollers and raceways gives NU1019 high radial capacity but no tolerance for misalignment: beyond roughly 3–4 arc-minutes the roller ends edge-load and fatigue accelerates. Mass 1380 g for the 95×145×24 mm NU1019 execution covers the pressed-steel cage and full roller complement; substitute on mass plus rating, not envelope alone. Housing and shaft fillets must clear the ring chamfers of NU1019; an oversized radius locks the ring on its face and tilts the 24 mm-wide seat.
Typical equipment & failure modes
Common applications
- crusher and vibrating-screen drive shafts
- marine gearbox and deck-machinery shafts
- large electric-motor and generator rotors
- cement and mining conveyor drive pulleys
Known failure patterns
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- pressed-steel cage pocket wear when rollers skid at light load or too-thin lubricant
- roller-end and raceway scoring from inadequate oil flow under heavy radial load
- rolling-contact fatigue after the catalogue L10 life is exceeded
- hard-particle indentation of raceways in unfiltered oil or open arrangements
Selection pitfalls — read before you substitute
- Induction-heat the 95 mm inner ring (max 120 °C) and mount it before fitting the outer ring; the ring mass makes square guidance essential — driving through the rollers brinells the 145 mm raceway.
- Open NU1019 units need application-supplied sealing and a defined lubricant schedule; film thickness is the first failure mode for line contact when viscosity drops at the 95 mm contact.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NU1019 skids at 4,800 r/min and fails by smearing long before L10 fatigue.
- The 24 mm width and abutment faces must be square to the axis; a tilted spacer concentrates load across the roller set and shows as uneven raceway polish on the 95 mm inner ring.
- Wide (22/23) and light (10/49) executions at 95 mm bore share bore but not OD/width; check the full NU1000 series code before substituting, because housing and shoulder geometry will not interchange.
- The 101/120 kN ratings, 13.9 kN Pu and 1380 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU1019 (standard execution); other makes sharing the ISO 15 envelope revise internal geometry without changing the order number, so keep the 2203E reference with the specification for critical drives.
Frequently asked questions
What are the dimensions and catalogue data of NU1019?
NU1019 is an NTN NU single-row cylindrical roller bearing to ISO 15: 95 mm bore, 145 mm OD and 24 mm width (3.74 × 5.709 × 0.945 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 101 kN, C0 120 kN, Pu 13.9 kN, grease limiting speed 4,800 r/min, oil 5,600 r/min, mass about 1380 g. It is open, with a pressed sheet-steel cage.
What is the difference between NU, NJ, NUP, N and NF cylindrical roller bearings?
The prefix states the rib arrangement: NU has two outer-ring ribs and a ribless inner ring (float, no axial load); NJ adds ribs for one-direction location; NUP adds a loose L-ring to locate both directions; N has two inner-ring ribs and a separable outer ring; NF has one rib per ring for one-direction guidance. NU1019 is two integral ribs on the outer ring and a ribless, separable inner ring — a non-locating bearing that lets the shaft float axially.
What do the EA, E and ＊ suffixes mean on NTN cylindrical roller bearings?
EA is NTN's high-capacity design with a pressed sheet-steel cage and optimised roller complement in the same ISO 15 envelope; E marks the high-capacity design at the larger bores; the ＊ symbol printed before the code in the NTN catalogue marks the ULTAGE new-generation specification and is not typed as part of the order number. NU1019 is supplied in the standard open execution shown in the table.
Can NU1019 take axial load and locate a shaft?
the NU design carries no axial load and floats axially on both sides. Provide axial location with an adjacent locating bearing (angular-contact, deep-groove or a paired NJ/NUP set).
What do Fw and Ew mean for NU1019?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 108 mm, Ew 132 mm. The nominal bore/OD remain 95/145 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 4,800 r/min grease / 5,600 r/min oil.
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.