305702-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 305702-C-2Z model number is decoded

the 40 mm outside diameter is the crowned track contact surface, the 15 mm bore takes the pin and the 15.9 mm overall width spreads the Hertzian contact across the thick-walled outer ring published ratings C 10.1 kN and C0 5.5 kN already include the outer-ring bending correction that track rollers require; the C/C0 ratio of 1.84 reflects two ball sets at a 30 deg contact angle fatigue load limit Pu 0.263 kN against a 15 mm bore gives 0.67 kN per mm of bore, and the 9,000 r/min figure is a mechanical limit rather than a thermal one the maximum permissible radial loads are Fr 5.85 kN dynamically and F0r 8.5 kN statically; because the permissible static load is the lower of F0r and C0, the 5.5 kN figure governs static selection here the 15.9 mm width carries 0.64 kN per mm, the ring section measures 12.5 mm between bore and track surface, and 100 g over a 40x15.9 mm envelope is 0.157 g per mm2 of projected area for medium-high-speed cam duty dimensionally this is a 32 dimension series of double row angular contact ball bearings at 15 mm bore with a thick-walled outer ring pushed out to 40 mm (the base bearing measures 35 mm); the additional ring wall is what resists bending when the roller is unsupported in a housing at 15 mm bore this size balances load capacity against envelope: 10.1 kN of dynamic capacity in a 40 mm ring, with the 15.9 mm width still narrow enough for compact cam plates 3057 is the flat-running-surface double row cam roller: the same 30 deg double row angular contact basis as 3058, but with a cylindrical (flat) outer ring instead of a crowned one the 30 deg contact angle of the two ball sets is what gives the double row roller its tilting stiffness — under a moment load the rows react in opposite directions instead of unloading one edge of the ring the 2Z suffix means sheet steel shields on both sides rather than elastomeric seals: they keep coarse debris out but will not retain a grease fill as tightly as the NBR contact seals of the single row roller typical duties are textile machinery cam gear, food processing index conveyors and packaging machine timing cams this size is regularly specified for textile machinery cam gear and food processing index conveyors, where the 40 mm ring rides the cam profile and the 15 mm bore takes a g6 pin the two ball rows and the 15.9 mm wide ring make packaging machine timing cams a natural fit; the 100 g mass keeps the follower inertia low enough for rapid oscillating cam motion relubrication depends on the inner-ring lubrication hole and a drilled pin; if neither is provided, grease replacement needs the roller dismantled from the yoke 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

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the 2Z shield keeps coarse debris out but is not a contact seal, so fine abrasive dust in a wash-down environment can still reach the ball rows
• relubrication depends on the inner-ring lubrication hole and a drilled pin; if neither is provided, grease replacement needs the roller dismantled from the yoke
• 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