NU1012 bearing: complete specifications & equivalents
The NU1012 is a ISO 15 radial bearing sized 60 x 95 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 60 mm |
| Outer diameter D | 95 mm |
| Width B | 18 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 44.5 kN |
| Basic static load rating C0 | 48.5 kN |
| Fatigue load limit Pu | 5.95 kN |
| Limiting speed (mechanical) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 467 g |
| Manufacturer designation | NTN NU1012 |
| 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 | 2.362 in |
|---|---|
| Outer diameter D | 3.74 in |
| Width B | 0.709 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 17.5 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) | 8 of 47 |
| Bore above smallest NU1000-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NU1012-ML | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×95×18 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 NU1012 model number is decoded
The NTN order number NU1012 denotes a 60×95×18 mm (2.362 × 3.74 × 0.709 in) cylindrical roller bearing in the NU1000 family, a pressed sheet-steel cage. Digit by digit, NU1012 reads as NU (outer ring ribbed, inner ring ribless), ISO 15 series, and bore 60 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. The separable ring comes off without removing the roller assembly from the other ring, which eases inspection and lets the non-locating arrangement accommodate thermal shaft growth — the NU design floats on both sides. The 60 mm (2.362 in) bore and 95 mm (3.74 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 18 mm-wide ring. Housing and shaft fillets must clear the ring chamfers of NU1012; an oversized radius locks the ring on its face and tilts the 18 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
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- cage wear accelerated when the EA high-capacity roller complement runs continuously above its thermal balance
- grease starvation and cage drag when relubrication intervals are extended past the grease life
- 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 60 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 95 mm raceway.
- Do not replace NU1012 with a deep-groove ball bearing on rating alone: line contact gives 44.5 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
- Do not replace NU1012 with a deep-groove ball bearing on rating alone: line contact gives 44.5 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
- The 17.5 mm section at 60 mm bore leaves a narrow oil path; with the standard cage the relubrication groove and oil-level design must keep grease from churning in the 18 mm-wide cavity.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 44.5/48.5 kN pair here belongs to NU1012 as printed, not to the bare size.
- The 44.5/48.5 kN ratings, 5.95 kN Pu and 467 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU1012 (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 NU1012?
NU1012 is an NTN NU single-row cylindrical roller bearing to ISO 15: 60 mm bore, 95 mm OD and 18 mm width (2.362 × 3.74 × 0.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 44.5 kN, C0 48.5 kN, Pu 5.95 kN, grease limiting speed 7,500 r/min, oil 8,800 r/min, mass about 467 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. NU1012 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. NU1012 is supplied in the standard open execution shown in the table.
Can NU1012 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 NU1012?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 69.5 mm, Ew 85.5 mm. The nominal bore/OD remain 60/95 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 7,500 r/min grease / 8,800 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.