305707-C-2Z bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 14 cam rollers) · extracted 2026-10-14

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 14 cam rollers); 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

No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.

How the 305707-C-2Z model number is decoded

the 80 mm outside diameter is the crowned track contact surface, the 35 mm bore takes the pin and the 27 mm overall width spreads the Hertzian contact across the thick-walled outer ring published ratings C 31.9 kN and C0 20.4 kN already include the outer-ring bending correction that track rollers require; the C/C0 ratio of 1.56 reflects two ball sets at a 30 deg contact angle fatigue load limit Pu 0.865 kN against a 35 mm bore gives 0.91 kN per mm of bore, and the 4,300 r/min figure is a mechanical limit rather than a thermal one the maximum permissible radial loads are Fr 15.6 kN dynamically and F0r 22.4 kN statically; because the permissible static load is the lower of F0r and C0, the 20.4 kN figure governs static selection here the 27 mm width carries 1.18 kN per mm, the ring section measures 22.5 mm between bore and track surface, and 650 g over a 80x27 mm envelope is 0.301 g per mm2 of projected area for low-speed cam duty dimensionally this is a 32 dimension series of double row angular contact ball bearings at 35 mm bore with a thick-walled outer ring pushed out to 80 mm (the base bearing measures 72 mm); the additional ring wall is what resists bending when the roller is unsupported in a housing at 35 mm bore this is the largest cam roller listed; the 27 mm width gives 31.9 kN dynamic capacity but the limiting speed drops to 4,300 r/min, so it suits slow, heavily loaded cams 3057.. C is the flat-surface counterpart of 3058.. C; it presents the full 27 mm width to a flat track, which raises the contact area but leaves no margin for track angularity double row cam rollers use two cages — a ribbon-type ball-centred stamped steel cage and a snap-type ball-centred cage in PA66, glass fibre reinforced — so high-temperature duty must respect the polyamide cage's temperature ceiling the running surface here is cylindrical (flat), so the contact geometry assumes a well-aligned track; any angular misalignment between the roller axis and the guide surface moves the load straight onto the ring edges typical duties are paper converting web guides, textile machinery cam gear and food processing index conveyors this size is regularly specified for paper converting web guides and textile machinery cam gear, where the 80 mm ring rides the cam profile and the 35 mm bore takes a g6 pin the two ball rows and the 27 mm wide ring make food processing index conveyors a natural fit; the 650 g mass keeps the follower inertia low enough for rapid oscillating cam motion the flat running surface assumes an accurately aligned track; angular misalignment between the roller axis and the guide surface puts the whole load onto the ring edges the cylindrical ring offers no crown relief, so any track crown, deflection or parallelism error shows up directly as edge stress and shortened ring life

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the cylindrical ring offers no crown relief, so any track crown, deflection or parallelism error shows up directly as edge stress and shortened ring life
• the flat running surface assumes an accurately aligned track; angular misalignment between the roller axis and the guide surface puts the whole load onto the ring edges
• the flat profile cannot be swapped for a crowned 3058 ring without changing the contact geometry and the tolerance budget for track alignment