6304E-2RS/Z2 Deep Groove Ball Bearing
Selection Guide
First confirm bore, outer diameter and width match the dimensional envelope of your housing and shaft, then verify dynamic load rating Cr and limiting speed against actual radial load and operating speed. Deep groove ball bearings tolerate moderate bidirectional axial load; for heavier axial loads choose angular contact ball bearings or tapered roller bearings instead. Common suffix meanings: ZZ = metal shields on both sides, 2RS = contact rubber seals on both sides, C3 = radial clearance greater than normal (used with interference fits or elevated operating temperatures).
Frequently Asked Questions / FAQ
Is RAYSDE 6304E-2RS/Z2 available, and what is the MOQ?
6304E-2RS/Z2 is supplied by RAYSDE through ISO 9001:2015 certified partner factories, with both stock and build-to-order options. Standard-part MOQ is tiered by bore: ≤50mm:500 pcs / 51–100mm:100 pcs / 101–300mm:20 pcs / >300mm:4 pcs; non-standard items are quoted per drawing. Send an inquiry for formal pricing and lead time.
What are the technical specifications of RAYSDE 6304E-2RS/Z2?
Key parameters of the 6304E-2RS/Z2 Deep Groove Ball Bearing: bore d=20mm, outer D=52mm, width B=15mm. For the full dimension table, load and speed data, and CAD drawings, please contact RAYSDE.
Which industries and equipment use the 6304E-2RS/Z2 Deep Groove Ball Bearing?
Widely used in electric motors and generators, household appliances, water pumps and fans, automotive alternators and wheel hubs, agricultural transmissions, conveyor rollers and general-purpose gearboxes — the highest-volume general bearing type in industry.
What are the advantages of RAYSDE 6304E-2RS/Z2 versus imported brands?
As a supplier partnered with ISO 9001:2015 certified factories, RAYSDE offers 6304E-2RS/Z2 at competitive ex-works pricing with shorter lead times than comparable imported brands, plus non-standard customization and OEM support. Partner factories certified to ISO 9001:2015, with 3.1 material certificates available.
Can you provide engineering drawings and material certificates for 6304E-2RS/Z2?
Yes—CAD/DXF/PDF high-precision drawings and 3.1 material certificates (GCr15 bearing steel) for 6304E-2RS/Z2 are available on request from RAYSDE.
6304E-2RS-Z2 What do the ZZ, 2RS and C3 suffixes mean on a deep groove ball bearing?
ZZ means metal shields on both sides — they keep dust out but are not fully grease-tight. 2RS (also 2RSH / 2RS1) means contact rubber seals on both sides, giving better dust and water protection at slightly reduced limiting speed. C3 means radial internal clearance greater than normal, used when interference fits or high operating temperature would otherwise consume the clearance. Tell us your operating temperature and fit tolerances and we will confirm the correct clearance class.
6304E-2RS-Z2 What should I watch for when installing and lubricating deep groove ball bearings?
Never strike the rolling elements or cage directly — use a fitting sleeve and press on the ring with the interference fit (press the inner ring for a shaft fit, the outer ring for a housing fit). Fill grease to roughly one third to one half of the free internal space; overfilling causes excessive temperature rise at speed. For machines that stand idle for long periods, apply rust prevention and keep moisture out to avoid raceway corrosion.