NTN
⌀20
20 × 40 × 14 mm
Load C
19 kN
Speed
5,600
Weight
0.07 kg

The NTN 51204 is a small size thrust ball bearings with ISO dimensions 20×40×14 mm. Bearings in the 20mm bore range are commonly used in CNC rotary tables, couplings, hydraulic jacks, small vertical motor shafts. This is an open type, requires periodic lubrication, suitable for clean environments variant. NTN Japan — Japanese technology, consistent quality, strong in automotive and machine tool bearings — 4 equivalent brands available under ISO designation 51204.

NTNThrust Ball BearingsPre-Order 3–5 Days

NTN 51204

Thrust Ball Bearings — 20×40×14 mm — ISO 51204

Dimensions
Bore Diameter (d)20 mm
Outside Diameter (D)40 mm
Width (B)14 mm
Dynamic Load Rating (C)19 kN
Static Load Rating (C₀)25.5 kN
Limiting Speed (grease)5,600 rpm
Mass0.07 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0
Genuine NTN2–4h delivery in cityFree technical support

Technical Specifications

Full specifications for NTN 51204 per OEM catalog.

Bore Diameter (d)20 mm
Outside Diameter (D)40 mm
Width (B)14 mm
Dynamic Load Rating (C)19 kN
Static Load Rating (C₀)25.5 kN
Limiting Speed (grease)5,600 rpm
Mass0.07 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0

* Tolerances per ISO. Specifications per OEM catalog.

Cross-Reference — Equivalent Codes

Same ISO 51204 — interchangeable dimensions.

BrandPart Number
NTN51204
fag51204
nsk51204
skf51204
zvl51204
nachi51204

* C/C₀ may vary ±5% across manufacturers.

Compare 51204 Across Brands

Same interchangeable dimensions — different load ratings and pricing.

BrandSKUd×D×BC (kN)C₀ (kN)
NTN5120420×40×141925.5Current
FAG5120420×40×1419.4—View
NACHI5120420×40×1418.8—View
NSK5120420×40×1419—View
SKF5120420×40×1419—View
ZVL5120420×40×1419—View

FAQ — NTN 51204

Quick answers to common questions.

NTN 51204 có kích thước d×D×B = 20×40×14 mm theo tiêu chuẩn ISO. Đường kính trong d = 20 mm, đường kính ngoài D = 40 mm, chiều rộng B = 14 mm.

Common Applications

Machine toolsAutomotive

Thrust Ball Bearings with 20mm bore diameter are commonly used in CNC rotary tables, couplings, hydraulic jacks, small vertical motor shafts.

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NTN 51204
20×40×14 mm
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