NTN 71801 CDGA/HCP4

Angular · Open

The seat — 12 MM × 21 MM × 5 MM

Bore

12 MM

Outside dia

21 MM

Width

5 MM

Type

Angular

Seal

Open

Clearance

CN (Normal)

Precision

ABEC-1 (P0)

Dynamic C

2.1 kN

Static C0

1.2 kN

36 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 — 9 designations

Part number	Manufacturer	C	C0
71801 CD/HCP4	NTN	2.1 kN	1.2 kN
71801 CD/P4	NTN	2.1 kN	1.2 kN
71801 CDGA/P4	NTN	2.1 kN	1.2 kN
71801 CDGB/HCP4	NTN	2.1 kN	1.2 kN
71801 CDGB/P4	NTN	2.1 kN	1.2 kN
71801 ACD/HCP4	NTN	1.9 kN	1.1 kN
71801 ACD/P4	NTN	1.9 kN	1.1 kN
71801 ACDGA/P4	NTN	1.9 kN	1.1 kN
71801 ACDGB/P4	NTN	1.9 kN	1.1 kN

Check before substituting — 27 designations · top 12 shown

Part number	Manufacturer	C	Differs from this part
DDL-2112	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular
DDL-2112DD	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular Seal: 2RS contact seal — this part: Open
DDL-2112SS	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular
L-2112	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular
L-2112DD	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular Seal: 2RS contact seal — this part: Open
L-2112KK	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular
L-2112SS	MinebeaMitsumi (NMB)	1.9 kN	Type: Deep groove ball — this part: Angular
61801	NTN	1.7 kN	Type: Deep groove ball — this part: Angular
61801-2RS1	NTN	1.7 kN	Type: Deep groove ball — this part: Angular Seal: 2RS contact seal — this part: Open
61801-2Z	NTN	1.7 kN	Type: Deep groove ball — this part: Angular Seal: 2Z shield — this part: Open
6801-2RS1	NTN	1.6 kN	Type: Deep groove ball — this part: Angular Seal: 2RS contact seal — this part: Open
6801-2Z	NTN	1.6 kN	Type: Deep groove ball — this part: Angular Seal: 2Z shield — this part: Open

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.

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