NTN 6307-ZNR

Deep groove ball · Open

The seat — 35 MM × 80 MM × 21 MM

Bore

35 MM

Outside dia

80 MM

Width

21 MM

Type

Deep groove ball

Seal

Open

Clearance

CN (Normal)

Precision

ABEC-1 (P0)

Dynamic C

35.1 kN

Static C0

19.0 kN

132 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 — 22 designations · top 20 shown

Part number	Manufacturer	C	C0
6307 JEM	NTN	35.1 kN	19.0 kN
6307 N	NTN	35.1 kN	19.0 kN
6307 NR	NTN	35.1 kN	19.0 kN
6307 NRJEM	NTN	35.1 kN	19.0 kN
6307 RSJEM	NTN	35.1 kN	19.0 kN
6307 ZJEM	NTN	35.1 kN	19.0 kN
6307 ZNRJEM	NTN	35.1 kN	19.0 kN
MRC.307S	NTN	35.1 kN	19.0 kN
MRC.307SF	NTN	35.1 kN	19.0 kN
MRC.307SFF	NTN	35.1 kN	19.0 kN
MRC.307SFFG	NTN	35.1 kN	19.0 kN
MRC.307SG	NTN	35.1 kN	19.0 kN
307	NTN	34.7 kN	26.5 kN
307-ZNR	NTN	34.7 kN	26.5 kN
307 NR	NTN	34.7 kN	26.5 kN
MRC.307M	NTN	34.7 kN	26.5 kN
MRC.307MFF	NTN	34.7 kN	26.5 kN
MRC.307MG	NTN	34.7 kN	26.5 kN
307K	Timken	33.5 kN	19.0 kN
6307	NTN	33.5 kN	19.0 kN

Check before substituting — 110 designations · top 12 shown

Part number	Manufacturer	C	Differs from this part
21307 CC	NTN	79.2 kN	Type: Spherical — this part: Deep groove ball
21307 CC/C2	NTN	79.2 kN	Type: Spherical — this part: Deep groove ball Clearance: C2 — this part: CN (Normal)
21307 CC/C3	NTN	79.2 kN	Type: Spherical — this part: Deep groove ball Clearance: C3 — this part: CN (Normal)
BC1-0314	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
N 307 ECP	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NF 307 ECP	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NJ 307 ECJ	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NJ 307 ECM	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NJ 307 ECP	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NJ 307 ECP/C3	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball Clearance: C3 — this part: CN (Normal)
NU 307 ECJ	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball
NU 307 ECJ/C3	NTN	75.0 kN	Type: Cylindrical — this part: Deep groove ball Clearance: C3 — this part: CN (Normal)

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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