305703-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 305703-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 dimensionally this is a 32 dimension series of double row angular contact ball bearings at 17 mm bore with a thick-walled outer ring pushed out to 47 mm (the base bearing measures 40 mm); the additional ring wall is what resists bending when the roller is unsupported in a housing at 17 mm bore this size balances load capacity against envelope: 13 kN of dynamic capacity in a 47 mm ring, with the 17.5 mm width still narrow enough for compact cam plates the 3057 prefix identifies the cylindrical running surface option of the double row cam roller, for guides and tracks that are machined and aligned accurately enough not to need the crown's misalignment tolerance because there are two ball rows, this roller accepts noticeably higher tilting moments than a single row cam roller of the same outside diameter; the trade is a larger section and a lower limiting speed 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 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 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 woodworking machinery feed cams a natural fit; the 160 g mass keeps the follower inertia low enough for rapid oscillating cam motion 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

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 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
• the flat profile cannot be swapped for a crowned 3058 ring without changing the contact geometry and the tolerance budget for track alignment