3313-DNRCBM 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-DNRCBM model number is decoded

3313 DNRCBM is SKF's 65 mm-bore double-row angular-contact ball bearing of the 3300 series — two ball rows back-to-back for two-direction axial location in one unit, 65×140×58.7 mm. A on a double-row bearing means no filling slots, so both rows carry their full ball complement in both directions. D marks a two-piece (split) inner ring that simplifies mounting of the heavy 33-series section. NR adds a snap-ring groove in the outer ring supplied with the appropriate snap ring, and CB gives controlled axial clearance. DNRCBM combines the split inner ring, snap ring (NR), controlled CB clearance and a machined brass ball-centred M cage. CB means universally matchable with Normal axial internal clearance: the two side faces are ground so any two units form DB (back-to-back), DF (face-to-face) or DT (tandem) sets without regrinding. Envelope 65×140×58.7 mm (2.559×5.512×2.311 in), 37.5 mm radial section height, C 138 kN, C0 122 kN, Pu 5.1 kN.reference speed 5,300 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 4000 g. Sizing arithmetic on the 65 mm bore: 138 kN C divided by the 37.5 mm radial section height gives 3.7 kN per section millimetre; the 4000 g mass and 4 % Pu/C share frame the light-load floor for the adjusted-life check. Envelope economics: the 58.7 mm width over a 37.5 mm section yields 1.57 mm of ring width per section millimetre, and the bearing weighs 4000 g for 138 kN of dynamic capacity — about 29 g per rated kN. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Compared with a single-row pair of the same bore, the double-row 3313 occupies less axial space but offers less freedom to adjust preload — do not substitute without re-checking the arrangement.
• The D executions have a two-piece inner ring: mount both halves square to each other, never press on the outer ring, and keep the split faces clean during fitting.
• Controlled axial clearance is the heart of the design: CB denotes controlled Normal axial clearance between the two rows; check residual clearance after mounting and at operating temperature.
• The double-row 3313 takes thrust in both directions by itself — that is the reason to choose it over two single-row bearings: one housing bore, one fit, built-in set geometry.
• The D executions have a two-piece inner ring: mount both halves square to each other, never press on the outer ring, and keep the split faces clean during fitting.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 3313 DNRCBM as the double d nr cb m execution; the other order numbers of the 3313 size are different products and may carry different ratings — always quote the full designation when purchasing.