29675-29620 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); 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 29675-29620 model number is decoded

SKF 29675/29620 belongs to the SKF single-row tapered roller range — the 69.85 mm bore entry in the inch 29600-series, dimensioned 112.712 mm OD and 25.4 mm wide.Digit by digit, 29675 reads as cone reference / cup reference in the 29600-series inch series; the 69.85 mm bore, 112.712 mm OD and 25.4 mm width are the metric equivalents of the original inch boundary values. In SKF suffix language a bare 29675 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Selection arithmetic: the C0/C ratio is about 1.29 (static 156 kN against dynamic 121 kN), typical of a tapered roller sized for axial capacity, and the 17.6 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 29675 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Load system: the 121 kN basic dynamic rating C and 156 kN static rating C0 give a C0/C balance of 1.29, and dividing C by the 69.85 mm bore yields 1.73 kN per millimetre of journal — a density metric that compares across families; the 17.6 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 69.85 mm shaft carrying variable duty. Within the 29600-series tables, 29675 appears in several rows because SKF lists multiple cup options for the same cone. 29675 is the 29620 variant, with 112.712 mm OD and 25.4 mm width; neighbouring rows on the same cone differ only in the cup but are separate orderable bearings.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 69.85 mm bore 29675 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
• The 29600-series inch series at 69.85 mm bore (112.712×25.4 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
• Setting is a design value, not an assembly feel: excessive preload in the 29675 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• At the 121 kN rating of 29675, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 5,300 r/min speed end and heavier preload only where moment stiffness dominates.
• The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
• The 121/156 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of 29675 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 29675/29620 designation when purchasing and match the execution to the mounting arrangement.