QJ-212-N2PHAS bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.

Cross references & equivalents

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 QJ-212-N2PHAS model number is decoded

QJ 212 N2PHAS is SKF's 60 mm-bore QJ four-point contact ball bearing of the QJ200 series, 60×110×22 mm, with a two-piece inner ring for bidirectional axial location beside a radial bearing. QJ identifies a four-point contact ball bearing with a two-piece inner ring: the gothic-arch raceways seat each ball at four points, giving axial location in both directions while a paired radial bearing carries the radial load. N2 marks two locating slots, 180° apart, in one outer-ring side face: pins or dogs engage the slots to stop the outer ring turning in its radially-clear housing bore. glass-fibre reinforced PEEK cage, outer-ring-centred with lubrication grooves in the guiding surfaces (suffix PHAS), for very high-speed oil-air or grease lubrication. Envelope 60×110×22 mm (2.362×4.331×0.866 in), 25.0 mm radial section height, C 96.5 kN, C0 93 kN, Pu 4 kN.SKF publishes only the 10,000 r/min limiting speed for this execution, catalogue mass 990 g. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 10,000 r/min and no separate thermal reference is published; at dm ≈ 85.0 mm the corresponding dn is approximately 850k mm·r/min. Sizing arithmetic on the 60 mm bore: 96.5 kN C divided by the 25.0 mm radial section height gives 3.9 kN per section millimetre; the 990 g mass and 4 % Pu/C share frame the light-load floor for the adjusted-life check. Bore-to-OD planning: OD 110 over bore 60 is a 1.83× step for this size, and the 22 mm width gives a bore/width ratio of 2.73; use these ratios when housing space around the 60 mm shaft is the first constraint. Locating-slot execution: the two N2 notches are milled into one outer-ring side face exactly 180 degrees apart and engaged by housing dogs or headed pins during assembly; verify dog engagement by hand before the cover goes on, deburr the slot edges after any housing rework, and re-inspect the slot roots for fretting marks at each overhaul because a dog that rides only one slot lets the outer ring walk. The slots identify this order number unmistakably: the plain MA/PHAS execution of the same bore has no notches and must be secured differently.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Provide a minimum axial load (spring preload is common) so the balls stay correctly seated at speed and light-load conditions; otherwise they skid.
• The inner ring is two-piece: handle both halves together, mount square, and do not separate the split ring unless the fitting procedure requires it.
• Provide a minimum axial load (spring preload is common) so the balls stay correctly seated at speed and light-load conditions; otherwise they skid.
• Anti-rotation is built into QJ-212-N2PHAS: check the two N2 slot faces and the engaging housing dogs at every refit, and never rely on cover friction to stop the radially loose outer ring.
• The PHAS PEEK cage of QJ-212-N2PHAS is outer-ring-centred with lubrication grooves: feed clean oil-air or appropriate grease to the guide land and inspect groove filling at overhaul.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for QJ 212 N2PHAS as the qj slotted execution; the other order numbers of the QJ 212 size are different products and may carry different ratings — always quote the full designation when purchasing.