305803-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 305803-C-2Z model number is decoded

the 47 mm outside diameter is the crowned track contact surface, the 17 mm bore takes the pin and the 17.5 mm overall width spreads the Hertzian contact across the thick-walled outer ring published ratings C 13 kN and C0 7.35 kN already include the outer-ring bending correction that track rollers require; the C/C0 ratio of 1.77 reflects two ball sets at a 30 deg contact angle fatigue load limit Pu 0.315 kN against a 17 mm bore gives 0.76 kN per mm of bore, and the 8,000 r/min figure is a mechanical limit rather than a thermal one the maximum permissible radial loads are Fr 9.3 kN dynamically and F0r 13.4 kN statically; because the permissible static load is the lower of F0r and C0, the 7.35 kN figure governs static selection here the 17.5 mm width carries 0.74 kN per mm, the ring section measures 15.0 mm between bore and track surface, and 160 g over a 47x17.5 mm envelope is 0.195 g per mm2 of projected area for medium-high-speed cam duty the catalogue sizes cam rollers on ISO 15 with the outside diameter excepted: bore 17 mm and width 17.5 mm follow the 32 series, but the 47 mm ring OD sits 7 mm proud of the 40 mm base-bearing diameter so that the track contact area is increased the 17 mm bore puts this in the small-to-medium transition; the two ball sets give the tilting stiffness needed when the cam track runs slightly out of parallel 3058.. C denotes the crowned variant of the double row cam roller; the two ball rows and the 30 deg contact angle give it more tilting-moment capacity than any single row execution 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 crowned outer ring is ground to a 400 mm radius while the bore and width follow the standard 32-series envelope, so the roller can be swapped into an existing yoke without changing the pin or housing typical duties are packaging machine timing cams, glass handling line guides and cam drives and indexing mechanisms this size is regularly specified for packaging machine timing cams and glass handling line guides, where the 47 mm ring rides the cam profile and the 17 mm bore takes a g6 pin the two ball rows and the 17.5 mm wide ring make cam drives and indexing mechanisms a natural fit; the 160 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 crowned surface is ground at twice the Normal tolerance for its diameter; do not mix a 3058 ring with a 3057 flat ring in a matched pair
• 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
• relubrication is only possible through the inner-ring lubrication hole, which needs a matching duct in the pin; without that duct the roller is effectively sealed for life