22312EMKD1 bearing: complete specifications & equivalents
The 22312EMKD1 is a ISO 15 radial bearing sized 60 x 130 x 46 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 | 130 mm |
| Width B | 46 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 340 kN |
| Basic static load rating C0 | 319 kN |
| Fatigue load limit Pu | 20.3 kN |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2850 g |
| Manufacturer designation | NTN 22312EMKD1 |
| 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 & 22300-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 1.811 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 22300-series | 40 mm |
| Largest outer diameter in 22300-series | 620 mm |
| Width range across 22300-series | 33–185 mm |
| Bore position in 22300-series (smallest first) | 5 of 28 |
| Bore above smallest 22300-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22312EMD1 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 22300-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 22312EMD1 — 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 22312EMKD1 model number is decoded
22312EMKD1 is an NTN double-row spherical roller bearing: two rows of symmetric rollers on a sphered outer raceway, 60×130×46 mm to ISO 15, with one-piece machined brass cage (EM high-capacity design). On the NTN nameplate the suffix cluster after the size reads in order: cage design (EM), bore (K), lubrication feature (D1); 22312EMKD1 is assembled exactly in that order. The 1:12 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 60 mm bore assembly. With about 5.7 kN of C per millimetre of the 60 mm bore, 22312EMKD1 screens interchange candidates quickly — then verify cage (EA/EM), bore (K/K30) and lubrication feature (D1/W33) suffixes. Fillet radii on shaft and housing must clear the ring chamfers of the 46 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
Typical equipment & failure modes
Common applications
- wind-turbine gearbox and rotor bearings
- large vibrating screens and mining feeders
- heavy conveyor and bucket-excavator pulleys
- jaw/cone crusher eccentric and shaft positions
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
- hard-particle indentation through the open arrangement in dusty mining duty
Selection pitfalls — read before you substitute
- Mount the 60 mm ring with induction heat or the sleeve drive-up procedure; at 2850 g cocking damages the spherical raceways, and repositioning after seating is impractical.
- Do not confuse EA and EM at the same number: 22312EMKD1 carries EM machined-brass-cage; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 60×130 mm envelope is identical.
- Minimum load must be maintained even at rest under vibration: an unloaded 22312EMKD1 on a stopped screen false-brinells; parking brakes and shaker isolation both matter.
- Open spherical rollers swallow dust in mining duty; specify labyrinth or taconite seals externally, or the 3,600 r/min grease rating is lost to abrasive wear long before fatigue.
- Do not confuse EA and EM at the same number: 22312EMKD1 carries EM machined-brass-cage; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 60×130 mm envelope is identical.
- The 340/319 kN ratings, 20.3 kN Pu and 2850 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22312EMKD1 (EM machined-brass-cage/D1); 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 22312EMKD1?
22312EMKD1 is an NTN double-row spherical roller bearing to ISO 15: 60 mm bore, 130 mm OD and 46 mm width (2.362 × 5.118 × 1.811 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 340 kN, C0 319 kN, Pu 20.3 kN, grease limiting speed 3,600 r/min, oil 4,600 r/min, mass about 2850 g. It is open, with one-piece machined brass cage (EM high-capacity design) and a 1:12 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K denotes a 1:12 tapered bore. 22312EMKD1 mounts on an adapter sleeve (or tapered shaft seat) and is driven up to the specified residual clearance; its cylindrical-bore counterpart in the same envelope and ratings is 22312EMD1.
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. 22312EMKD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22312EMKD1?
D1 is NTN's outer-ring lubrication feature: an annular groove with oil holes around the outer ring, aligned with a housing grease port so lubricant reaches both roller rows directly. 22312EMKD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 22312EMKD1 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 22300 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 340 kN C / 319 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.