6404 bearing: 20 × 72 × 19 mm

Bearings › 6404

A 6404 is a deep groove ball bearing, 20 mm bore, 72 mm outside diameter, 19 mm wide. Variants: 6404-2RS (rubber sealed), 6404-ZZ (metal shields), 6404 open.

Sizes from maker catalogues. No sourced load ratings for this one yet, so none are shown.

Open 6404 in BenchsmithAdd to order list

What the number means

Ask for

• 6404-2RS: rubber sealed both sides. Other brands: SKF 6404-2RSH, FAG 6404-2RSR, NSK 6404DDU, NTN 6404LLU, Koyo 6404-2RS.
• 6404-ZZ: metal shields both sides. Other brands: SKF 6404-2Z, FAG 6404-2ZR, NSK 6404ZZ, NTN 6404ZZ, Koyo 6404ZZ.
• 6404: open, no seals or shields.

Add C3 for electric motors and anything that runs hot.

Same bore, different size

• 680420 × 32 × 7
• 690420 × 37 × 9
• 1600420 × 42 × 8
• 600420 × 42 × 12
• 620420 × 47 × 14
• 630420 × 52 × 15

One size up or down

• 640317 × 62 × 17 (down)
• 640525 × 80 × 21 (up)

Every bearing 20 × 72 × 19 mm: 20 × 72 × 19 mm bearings. Measured a bearing with no number on it? Type the bore, OD and width into Benchsmith → Find → Bearing.