Skip to content
All products
Deep groove ball bearing with metal side shields · SKF W 6304-2Z
SKF W 6304-2Z stainless steel deep groove ball bearing

SKFBrand we market

SKF W 6304-2Z stainless steel deep groove ball bearing

Manufacturer Part NumberW 6304-2ZDimensions: 20 x 52 x 15 mm (d x D x B)Other bearings 20 x 52 x 15 mm →Also searched as: W63042Z · W6304-2Z · W 6304 2ZSKF W 63 series: dimension table →
Brand
SKF
Category
Bearings
Request a quote for W 6304-2Z via WhatsApp

We respond promptly.

Request your quote via WhatsApp or email, with the quantity you need.

Other brands in this category

Ask us about alternatives. Equivalence is verified for each reference and application.

Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.

Ask via WhatsAppAsk via email

How to read SKF W 6304-2Z

W 63Series
Stainless steel deep groove ball bearings, W 63 series. For the same bore, each series has a different outside diameter and width.
04Bore
20 mm bore: 04 × 5.
2ZSuffix
SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).

W 6304 is the standard (ISO) basic designation: it defines the type, the series and the bore.

Description

The SKF W 6304-2Z bearing has a 20 mm bore, a 52 mm outside diameter and a 15 mm width (20 x 52 x 15 mm).

SKF W 6304-2Z is a reference of stainless steel deep groove ball bearing, within Bearings. Request a quote for W 6304-2Z via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF W series stainless steel deep groove ball bearings are manufactured from stainless steel, which gives them high corrosion resistance. They are suitable for applications where moisture, chemicals or frequent washdowns are present. They are used in medical equipment, the food industry, precision instruments and machinery exposed to aggressive environments. Their single-row ball design supports moderate radial and axial loads.

The designation of these bearings follows a clear pattern. The initial letter W indicates that the bearing is made of stainless steel, which gives it corrosion resistance. Then comes the series number, which defines the size and load capacity; for example, W 608-2Z corresponds to the 608 series, with a thin section and reduced outer diameter. The -2Z suffix indicates that the bearing incorporates two metal protective shields, one on each side, which prevent the entry of contaminants and retain the lubricant. Other possible suffixes, such as -2RS, indicate elastomer seals for tighter sealing. The examples W 619/3-2Z and W 619/4-2Z show the 619 series with very small diameters, typical of precision instruments.

These bearings are used in industries where corrosion is a constant problem. In the food industry, they are used in conveyors, mixers and packaging equipment that are washed daily. In the medical sector, they appear in infusion pumps, centrifuges and diagnostic equipment. They are also found in machines for the chemical industry, in irrigation systems, in marine equipment and in laboratory applications. In Argentina, they are common in food processing plants and in the pharmaceutical industry, where hygiene and resistance to cleaning agents are critical.

To select the right bearing, take into account the type of load, the rotation speed and the environment. If there is direct exposure to liquids or dust, choose the variant with -2RS seals instead of the -2Z shields. The factory lubrication is sufficient for most applications; if you need to relubricate, check that the bearing has a lubrication groove. During mounting, ensure correct alignment between shaft and housing to avoid additional loads. Use suitable tools and avoid striking the rings. Excessive interference can damage the seals and reduce service life.

When looking for equivalents, bear in mind that each manufacturer has its own nomenclature. A stainless bearing from another brand may have a similar code, but they are not always interchangeable in terms of tolerances or load capacity. SKF's W series stands out for its high-quality stainless steel and its specific suffixes. If you need to replace a bearing, the safest approach is to compare the critical dimensions and the service conditions. At MR Accesorios Industriales we can advise you to find the best option.

If you already have your bearing's part number, send it by WhatsApp to MR Accesorios Industriales and we will quote you promptly. We work with SKF and can help you select the variant that best suits your application. Do not hesitate to ask us about sealing options.

Dimensions

Boundary dimensions of the basic designation W 6304 per ISO 15: 20 x 52 x 15 mm (d x D x B).

Bore
20mm
Outside diameter (D)
52mm
Width (B)
15mm

Frequently Asked Questions

What are the dimensions of the SKF W 6304-2Z bearing?
The SKF W 6304-2Z bearing has a 20 mm bore, a 52 mm outside diameter and a 15 mm width (20 x 52 x 15 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation W 6304.
What does the -2Z suffix mean on an SKF W bearing?
The -2Z suffix indicates that the bearing has two metal protective shields, one on each side. These shields prevent the entry of dust and particles, and retain the lubricant. They are suitable for applications where there is no direct contact with liquids.
What is the difference between a W bearing and a standard one?
The W series is manufactured from stainless steel, which gives it greater corrosion resistance compared to standard chrome steel bearings. This makes them suitable for humid environments, frequent washdowns or exposure to chemicals.
Can I replace a stainless bearing from another brand with an SKF W one?
In general, yes, but it is important to verify the dimensions and load conditions. Each manufacturer may have different tolerances and capacities. We recommend consulting us with the original part number to ensure compatibility.
Request a quote for W 6304-2Z via WhatsApp
Request a quote on WhatsApp