NTN
55
55 × 105 × 35 mm
Load C
90 kN
Speed
2,000
Weight
0.95 kg

The NTN 51311 is a standard size thrust ball bearings with ISO dimensions 55×105×35 mm. Bearings in the 55mm bore range are commonly used in vertical ball screws, large CNC rotary tables, heavy jacks, vertical pump 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 51311.

NTNThrust Ball BearingsPre-Order 3–5 Days

NTN 51311

Thrust Ball Bearings55×105×35 mm — ISO 51311

Dimensions
Bore Diameter (d)55 mm
Outside Diameter (D)105 mm
Width (B)35 mm
Dynamic Load Rating (C)90 kN
Static Load Rating (C₀)140 kN
Limiting Speed (grease)2,000 rpm
Mass0.95 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0
Genuine NTN2–4h delivery in cityFree technical support

Technical Specifications

Full specifications for NTN 51311 per OEM catalog.

Bore Diameter (d)55 mm
Outside Diameter (D)105 mm
Width (B)35 mm
Dynamic Load Rating (C)90 kN
Static Load Rating (C₀)140 kN
Limiting Speed (grease)2,000 rpm
Mass0.95 kg
Seal TypeOpen
ClearanceCN
Precision ClassP0

* Tolerances per ISO. Specifications per OEM catalog.

Cross-Reference — Equivalent Codes

Same ISO 51311 — interchangeable dimensions.

BrandPart Number
NTN51311
fag51311
nsk51311
skf51311
zvl51311
nachi51311

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

Compare 51311 Across Brands

Same interchangeable dimensions — different load ratings and pricing.

BrandSKUd×D×BC (kN)C₀ (kN)
NTN5131155×105×3590140Current
FAG5131155×105×3591.8View
NACHI5131155×105×3589.1View
NSK5131155×105×3590View
SKF5131155×105×3590View
ZVL5131155×105×3590View

FAQ — NTN 51311

Quick answers to common questions.

NTN 51311 có kích thước d×D×B = 55×105×35 mm theo tiêu chuẩn ISO. Đường kính trong d = 55 mm, đường kính ngoài D = 105 mm, chiều rộng B = 35 mm.

Common Applications

ManufacturingEnergy

Thrust Ball Bearings with 55mm bore diameter are commonly used in vertical ball screws, large CNC rotary tables, heavy jacks, vertical pump shafts.

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NTN 51311
55×105×35 mm
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