7305 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 3.1 single-row ACBB); 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 7305 model number is decoded

For a 25 mm shaft carrying combined load, SKF lists 7305 under catalogue execution 7305 BEP: one open single-row angular-contact ball bearing, 40° contact angle, in the medium (7300) series of the 7xxx family.Reading the designation: the leading 7 marks a single-row angular-contact ball bearing, the 3 is ISO diameter series 3 (medium section), and the last two digits encode the 25 mm bore; the 62 mm OD and 17 mm width follow the ISO 15 general plan. The suffix decodes as B for the 40° contact-angle execution, E for SKF's enhanced internal design with larger/fewer balls, and P for the glass-fibre reinforced PA66 ball-centred cage (continuous temperature ceiling 120 °C). At 14,000 r/min reference speed the 18.5 mm-section 7305 is governed thermally by preload and lubricant flow; oil-air or grease pack selection should be made against that value, with 14,000 r/min as the mechanical ceiling. Mounting practice for 7305: the rotating ring takes the interference fit (k5 on a 25 mm rotating shaft), the stationary ring slides for axial location, and reversing-thrust duty demands a paired DB/DF set rather than one bearing.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 25 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight 7305 pair heats, loses preload control and smears the raceways.
• The 73xx medium section at 25 mm bore (62×17 mm) is heavier-rated than the 7205 but runs hotter at the same speed; do not substitute a 7305 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• DB (back-to-back) pairs are stiffer against moments, DF (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common 7305 mounting error.
• A single 7305 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use a DB or DF matched pair for bidirectional location.
• Shaft and housing fillets must clear the bearing chamfer so the 17 mm-wide ring seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 24.2/14 kN ratings are SKF catalogue 17000 values for the 7305 BEP 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 7305 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7305 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7305 BEP is a single open bearing, not a universally matchable one; to mount a defined DB/DF pair order the BECBP (CB) execution — pairing two unmatched basic units gives uncontrolled preload because the side faces are not ground for set mounting.