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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
3 in stock
Maximum-capacity filling-slot ball bearing, 30 x 90 x 23 mm, open both sides, straight bore, heavy 400 series. Extra ball complement for radial load.
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$26.73
3 in stock
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| MFR / Brand | MRC |
|---|---|
| MPN | 406M |
| Model | 406-M 6406 |
| Bearing Type | Ball Bearing, Open |
| ID | 30 mm |
| OD | 90 mm |
| Width | 23 mm |
| Base Number | 406 |
|---|---|
| Common Misspellings | 406-MM, 4O6M, 406 Max |
| Mpn Variants | 406M, 406 M, 406-M, MRC406M, 6406M |
| Material | Chrome steel |
| Series | 400 |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Bearing Material | Chrome steel |
| Industry Terms | max type ball bearing; filling slot ball bearing; heavy series deep groove bearing; 30x90x23 bearing |
| Application Types | gearboxes; pumps; industrial machinery; heavy radial load shafts |
| Cross Reference 1 | SKF 6406 (related, Conrad type) |
|---|---|
| Cross Reference 2 | FAG 6406 (related, Conrad type) |
| Cross Reference 3 | NSK 6406 (related, Conrad type) |
| Cross Reference 4 | NTN 6406 (related, Conrad type) |
| Cross Reference 5 | Koyo 6406 (related, Conrad type) |
| Cross Reference 6 | Timken 6406 (related, Conrad type) |
| Cross Reference 7 | RHP 6406 (related, Conrad type) |
| Cross Reference 8 | MRC 406S (related, Conrad type) |
MRC 406M maximum-capacity single-row filling-slot ball bearing. Bore Diameter: 30 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1. Series: 400. Base Number: 406. Bearing Material: Chrome steel. Unit Quantity: 1 Pc.
400 — MRC heavy dimension series, the widest and thickest section for a given bore.
06 — bore code 06, giving a 30 mm bore.
M — maximum-capacity construction, with a filling slot ground into both ring shoulders.
Bore Diameter: 30 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Closure Type: Open. Series: 400. Country of Origin: United States.
The filling slot lets the factory load more balls into the raceway than a Conrad assembly of the same size will take, giving more radial capacity from the same 30 x 90 x 23 mm envelope. The 400 series adds section thickness, so a 30 mm shaft gets a 90 mm outside diameter where a light 6006 gives 55 mm. Open faces let the housing feed grease or oil straight to the raceways.
Straight bore, interference fit on the shaft. The filling slots sit in the ring shoulders and are visible on the outer ring face. One complete bearing, open on both faces.
The 30 x 90 x 23 mm envelope is the ISO 6406 boundary, so SKF 6406, FAG 6406, NSK 6406, NTN 6406 and Koyo 6406 fit the same space. Those are Conrad-assembly bearings with a smaller ball complement and different capacities, so they are related types rather than direct substitutions for a filling-slot max bearing. Designation variants: 406M, 406 M, 406-M, MRC406M, 6406M.
Maximum-capacity construction with a filling slot in both ring shoulders.
30 mm bore, 90 mm outside diameter, 23 mm width.
Same 30 x 90 x 23 mm envelope; the 6406 is a Conrad type with fewer balls and different capacities.
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