305804-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 305804-C-2Z model number is decoded

the 52 mm outside diameter is the crowned track contact surface, the 20 mm bore takes the pin and the 20.6 mm overall width spreads the Hertzian contact across the thick-walled outer ring published ratings C 16.5 kN and C0 9.5 kN already include the outer-ring bending correction that track rollers require; the C/C0 ratio of 1.74 reflects two ball sets at a 30 deg contact angle fatigue load limit Pu 0.4 kN against a 20 mm bore gives 0.82 kN per mm of bore, and the 7,000 r/min figure is a mechanical limit rather than a thermal one the maximum permissible radial loads are Fr 8.3 kN dynamically and F0r 12 kN statically; because the permissible static load is the lower of F0r and C0, the 9.5 kN figure governs static selection here the 20.6 mm width carries 0.80 kN per mm, the ring section measures 16.0 mm between bore and track surface, and 220 g over a 52x20.6 mm envelope is 0.205 g per mm2 of projected area for medium-high-speed cam duty the 20 mm bore and 20.6 mm width are those of the 32 series ball bearing at the same size code, while the 52 mm outside diameter is 5 mm larger than that bearing's 47 mm OD — this follows the SKF rule that cam rollers keep the ISO 15 dimension series except for the outside diameter the 20 mm bore places this in the medium band where the thick-walled outer ring is deep enough to carry 16.5 kN without excessive edge stress on the track reading 3058.. C-2Z: double row cam roller based on the 32 dimension series of double row angular contact ball bearings, crowned track surface, sheet steel shields on both sides the inner ring carries a lubrication hole on the double row design: where the mating pin is drilled with a matching duct, the roller can be relubricated in situ without dismantling the yoke 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 glass handling line guides, cam drives and indexing mechanisms and woodworking machinery feed cams this size is regularly specified for glass handling line guides and cam drives and indexing mechanisms, where the 52 mm ring rides the cam profile and the 20 mm bore takes a g6 pin the two ball rows and the 20.6 mm wide ring make woodworking machinery feed cams a natural fit; the 220 g mass keeps the follower inertia low enough for rapid oscillating cam motion 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

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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
• 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