305801-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 305801-C-2Z model number is decoded

the 35 mm outside diameter is the crowned track contact surface, the 12 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 9.04 kN and C0 4.555 kN already include the outer-ring bending correction that track rollers require; the C/C0 ratio of 1.98 reflects two ball sets at a 30 deg contact angle fatigue load limit Pu 0.193 kN against a 12 mm bore gives 0.75 kN per mm of bore, and the 9,500 r/min figure is a mechanical limit rather than a thermal one the maximum permissible radial loads are Fr 3.8 kN dynamically and F0r 5.4 kN statically; because the permissible static load is the lower of F0r and C0, the 4.555 kN figure governs static selection here the 15.9 mm width carries 0.57 kN per mm, the ring section measures 11.5 mm between bore and track surface, and 78 g over a 35x15.9 mm envelope is 0.140 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 12 mm bore with a thick-walled outer ring pushed out to 35 mm (the base bearing measures 32 mm); the additional ring wall is what resists bending when the roller is unsupported in a housing the 12 mm bore places this at the bottom of the range, where the double row angular contact basis still yields a useful tilting-moment capacity and the 78 g mass keeps drive inertia low 3058 is the crowned double row cam roller: two ball sets on a 30 deg contact angle inside a thick-walled ring whose running surface is ground crowned (400 mm radius), which is the standard surface for the double row design 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 on this roller denotes sheet steel shields rather than contact seals — effective against coarse contamination, but the design also provides a lubrication hole in the inner ring so that grease can be replenished through the pin typical duties are sheet metal forming press feeds, tube and wire drawing guides and material handling lift tracks this size is regularly specified for sheet metal forming press feeds and tube and wire drawing guides, where the 35 mm ring rides the cam profile and the 12 mm bore takes a g6 pin the two ball rows and the 15.9 mm wide ring make material handling lift tracks a natural fit; the 78 g mass keeps the follower inertia low enough for rapid oscillating cam motion the permissible static load is governed by the lower of F0r and C0, and the two ball rows must not be sized on C0 alone in a stationary cam position read the loading direction before selecting the contact angle: the 30 deg double row design is strong radially and in tilt, but continuous axial load on the outer ring is outside its intended duty

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• the 2Z shows as a sheet steel shield, so it will not hold grease as tightly as a contact seal and will not exclude fine abrasive dust from wash-down environments
• the permissible static load is governed by the lower of F0r and C0, and the two ball rows must not be sized on C0 alone in a stationary cam position
• read the loading direction before selecting the contact angle: the 30 deg double row design is strong radially and in tilt, but continuous axial load on the outer ring is outside its intended duty