3315-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 3315-A-2Z model number is decoded

3315 A-2Z is the capped double-row angular-contact ball bearing for a 75 mm shaft, 75×160×68.3 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 75×160×68.3 mm (2.953×6.299×2.689 in), 42.5 mm radial section height, C 176 kN, C0 140 kN, Pu 5.5 kN.SKF publishes only the 4,000 r/min limiting speed for this execution, catalogue mass 5600 g. Selection figures for 3315 A-2Z: the static-to-dynamic ratio C0/C is 0.80, Pu 5.5 kN is about 3 % of C, and catalogue mass works out to roughly 75 g per millimetre of bore. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 4,000 r/min and no separate thermal reference is published; at dm ≈ 117.5 mm the corresponding dn is approximately 470k mm·r/min. Speed-ratio note for this exact unit: no thermal reference speed is listed (seal/grease life governs), so the 4,000 r/min limiting value is the single published ceiling. 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

• Fit and fillet rules are unchanged from the open double-row 3315: k5 on a 75 mm rotating shaft, radii clearing the chamfer.
• The capped speed ceiling is 4,000 r/min — seal drag and grease life govern, which is why SKF publishes no thermal reference speed for A-2Z.
• The capped speed ceiling is 4,000 r/min — seal drag and grease life govern, which is why SKF publishes no thermal reference speed for A-2Z.
• Fit and fillet rules are unchanged from the open double-row 3315: k5 on a 75 mm rotating shaft, radii clearing the chamfer.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 3315 A-2Z as the double shielded execution; the other order numbers of the 3315 size are different products and may carry different ratings — always quote the full designation when purchasing.