NTN NA 4903 RS

Needle · Open

The seat — 17 MM × 30 MM × 14 MM

Bore

17 MM

Outside dia

30 MM

Width

14 MM

Type

Needle

Seal

Open

Clearance

CN (Normal)

Precision

Dynamic C

9.5 kN

Static C0

12.9 kN

32 other designations in the catalogue share this bore × outside diameter × width. Each was compared on the four fields every bearing row carries — Type, Seal, Clearance, Precision — as recorded, case- and separator-insensitively. All four agreeing puts a designation in the first list; anything else, a difference or a blank, puts it in the second with the fields named.

Candidates at the recorded dimensions above

May substitute — 0 designations

No designation in this seat matches this part on all four compared fields.

Check before substituting — 32 designations · top 12 shown

Part number	Manufacturer	C	Differs from this part
GE 17 TXGR	NTN	60.0 kN	Type: Spherical — this part: Needle
GE 17 C	NTN	22.4 kN	Type: Spherical — this part: Needle
GE 17 ES	NTN	21.2 kN	Type: Spherical — this part: Needle
GE 17 ES-2RS	NTN	21.2 kN	Type: Spherical — this part: Needle Seal: 2RS contact seal — this part: Open
NA 4903.2RS	NTN	9.5 kN	Seal: 2RS contact seal — this part: Open
71903 CD/HCP4ADGA	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/HCP4ADGC	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/P4ADBA	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/P4ADBB	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/P4ADBC	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/P4ADFC	NTN	6.8 kN	Type: Angular — this part: Needle
71903 CD/P4ADGA	NTN	6.8 kN	Type: Angular — this part: Needle

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

The envelope is recorded dimensions only: the same bore, outside diameter and width. Every designation above shares all three, or it would not be on this page.
The four compared fields are Type, Seal, Clearance, Precision. Two recorded spellings were counted to mean one value and are read as one: CN/Normal = CN, and ABEC-1/P0 = P0. A third precision spelling, P0/Class4, is deliberately not equated with either — the catalogue's meaning for it has not been sourced, so it lands in the warnings where both spellings are printed for the reader to judge.
A blank is a difference. Missing is the absence of the proof, not the proof.
Cage material and ring material are never compared: the catalogue records neither, on any bearing row.
Suffixes the catalogue does not record separately — a snap ring (NR) and anything else outside those four fields — are not compared, and this sheet does not claim they match.
Ranking is recorded dynamic load, strongest first, with an unrecorded rating ranked last. It orders the lists; it is not a verdict.
Compiled from catalogue records. This is not a manufacturer interchange list, no manufacturer has confirmed any line on it, and it does not know what job the bearing is doing. Verify before fitting.

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

BEARINGBRAIN.COM/PART/NA4903RS/SUBSTITUTE