Bearing 6004

The 6004 bearing is a single-row ball bearing measuring 20 × 42 × 12 mm (internal diameter 20 mm, external diameter 42 mm, width 12 mm). We stock 17 variants, 13 of which are in stock and ready for dispatch within 24 hours. Prices start at 30 Kč and vary depending on the manufacturer and variant.

Dimensions and interchangeability

The designation 6004 is an international standard (ISO 15), so a 6004 bearing from any manufacturer always has the same dimensions of 20 × 42 × 12 mm and is mechanically interchangeable. They differ only in terms of seal design, clearance, precision and service life. When replacing a worn part, you can therefore choose a different brand from the one used in the original machine.

The variants we stock

• 6004 2RS – double-sided rubber seals – for dusty and damp environments
• 6004 2RSH – double-sided rubber seal (SKF designation)
• 6004 LLU – double-sided rubber seal (NTN designation)
• 6004 2Z – double-sided metal cover – lower friction, higher speeds
• 6004 ZZ – double-sided sheet metal cover (NTN designation)
• 6004 C3 – increased radial clearance – for higher temperatures and interference fits
• 6004 N – groove for a retaining ring on the outer ring

Without a suffix, this is an open bearing without a seal — the cheapest option for clean and permanently lubricated mountings.

Manufacturers

For the 6004 designation, we offer SKF, NTN, ZVL, ZKL and IBB brands. ZVL or ZKL are sufficient for standard operation; for demanding and high-speed applications, we recommend SKF or NTN.

How to choose

The dimensions are identical for all 6004 bearings, so the choice depends on the operating environment: the 2RS with seals for dusty and damp conditions; the 2Z with covers for clean and high-speed applications; and C3 clearance for heating or press-fitting. If you’re unsure, we’ll advise you based on the machine and the original part — tel: 270 003 620. You can find details on bearing designations in the guide ‘How to Choose a Bearing’.