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Catalogue substitution sheet
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NTN NA 4909.2RS

Needle · 2RS contact seal

The seat — 45 MM × 68 MM × 23 MM

Bore
45 MM
Outside dia
68 MM
Width
23 MM
Type
Needle
Seal
2RS contact seal
Clearance
CN (Normal)
Precision
P0
Dynamic C
45.0 kN
Static C0
64.0 kN

No other designation in the catalogue shares this bore × outside diameter × width. There is nothing to compare, and nothing here guesses at a near neighbour: a bearing one millimetre off this seat is a different seat.

What this sheet is — and what the catalogue did not say

Anyone with this link can view this part and its recorded candidate comparison.

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