3313-A-2Z 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 3313-A-2Z model number is decoded

3313 A-2Z is the capped double-row angular-contact ball bearing for a 65 mm shaft, 65×140×58.7 mm, greased and sealed (or shielded) for life at the SKF works. A on this double-row bearing means no filling slots, so both ball rows retain their full complement. -2Z marks a sheet-metal shield on each side: non-contacting, grease-retention and dust protection with negligible drag, the bearing remaining open-style relubricatable only through the shield clearance. Envelope 65×140×58.7 mm (2.559×5.512×2.311 in), 37.5 mm radial section height, C 146 kN, C0 110 kN, Pu 4.55 kN.SKF publishes only the 4,500 r/min limiting speed for this execution, catalogue mass 4100 g. At the printed limiting speed of 4,500 r/min the mean pitch diameter dm ≈ 102.5 mm implies a dn value around 461k mm·r/min; only the limiting speed is published for this execution. Selection figures for 3313 A-2Z: the static-to-dynamic ratio C0/C is 0.75, Pu 4.55 kN is about 3 % of C, and catalogue mass works out to roughly 63 g per millimetre of bore. Bore-to-OD planning: OD 140 over bore 65 is a 2.15× step for this size, and the 58.7 mm width gives a bore/width ratio of 1.11; use these ratios when housing space around the 65 mm shaft is the first constraint. Shielded execution note: the two sheet-metal -2Z covers clip into the outer ring without contacting the inner ring, giving grease retention and coarse-dust protection at virtually no friction; the cavity is factory-greased and the shield arrangement suits dry, moderately dusty positions rather than wash-down duty, where the A-2RS1 contact-seal order number is the alternative.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The non-contact shields cap the speed with negligible drag: no relubrication is provided for, so mounting cleanliness decides much of the real grease life.
• Open 3313 and capped 3313-A-2Z share the 65×140×58.7 mm envelope and 146/110 kN ratings — the choice is maintenance access and contamination, not capacity.
• Open 3313 and capped 3313-A-2Z share the 65×140×58.7 mm envelope and 146/110 kN ratings — the choice is maintenance access and contamination, not capacity.
• Fit and fillet rules are unchanged from the open double-row 3313: k5 on a 65 mm rotating shaft, radii clearing the chamfer.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 3313 A-2Z as the double shielded execution; the other order numbers of the 3313 size are different products and may carry different ratings — always quote the full designation when purchasing.