7317 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 7317 model number is decoded

In SKF catalogue PUB BU/P1 17000, 7317 appears as 7317 BEP: a 40° contact-angle, open, one-direction-thrust ball bearing in the medium (7300) series, supplied with a glass-fibre PA66 cage as standard.The code breaks down as type prefix 7 (angular contact), diameter series 3 (the medium section), and bore code 17 = 85 mm; dimensions 85×180×41 mm therefore match the 6317 deep-groove envelope even though the internal design is different. Here B marks the steep 40° contact angle (the highest-capacity single-row angle), E the modernised internal geometry and P the glass-fibre nylon cage; the same bare size in a 25° A-angle or brass M-cage execution carries a different suffix. Catalogue mass 4450 g for the 85×180×41 mm open execution covers the PA66 cage and standard ball complement; sealed or brass-cage variants of the same size differ slightly in mass and carry their own order numbers. Fit selection follows the rotating ring — interference on a rotating inner ring — and two 7317 units are required to take reversing thrust; keep the induced axial load (0.5·Fr/Y for the 40° angle) inside the rated capacity when calculating the pair.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 85 mm bore 7317 by induction heating of the inner ring (max 120 °C — the PA66 cage sets the ceiling, not the steel); driving it home through the outer ring or balls brinells the asymmetric raceway.
• The 73xx medium section at 85 mm bore (180×41 mm) is heavier-rated than the 7217 but runs hotter at the same speed; do not substitute a 7317 into a 72-series spindle position without re-checking dn, lubricant film and preload.
• At the 146 kN rating of 7317, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 4,300 r/min speed end and heavier preload only where moment stiffness dominates.
• Do not mix execution classes inside one 7317 pair — universal-matchable (CB) bearings are ground for arbitrary pairing, but a CB unit paired with an unmatched basic BEP bearing will not share preload evenly.
• Shaft and housing fillets must clear the bearing chamfer so the 41 mm-wide ring seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 146/122 kN ratings are SKF catalogue 17000 values for the 7317 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 7317 (BEP basic, BECBP universally matchable, BE-2RZP sealed, BECBM brass-cage, ACC-series at 25°); they are not interchangeable order numbers — quote the full 7317 BEP designation when purchasing and match the execution to the mounting arrangement.
• A plain 7317 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.