MRC406MMaximum Capacity Filling Slot Ball Bearing – 30 mm Bore, 90 mm OD, 23 mm Width, Open, Straight Bore, Heavy 400 Series

Product Description

What this part is:

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.

Decoding the designation:

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.

Specifications:

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.

Dimensions and mounting:

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.

Compatibility and replacement:

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.

Frequently asked questions:

What does the M in 406M mean?

Maximum-capacity construction with a filling slot in both ring shoulders.

What are the dimensions of the 406M?

30 mm bore, 90 mm outside diameter, 23 mm width.

Is the 406M the same as a 6406?

Same 30 x 90 x 23 mm envelope; the 6406 is a Conrad type with fewer balls and different capacities.