Koyo
40
40 × 90 × 23 mm
Load C
40.2 kN
Speed
8,000
Weight
0.56 kg

The Koyo 6308ZZ is a standard size deep groove ball bearings with ISO dimensions 40×90×23 mm. Bearings in the 40mm bore range are commonly used in motors 5.5-37kW, centrifugal pumps, air compressors, industrial gearboxes (5.5-37kW range). This is an double shielded (ZZ), effective dust prevention while allowing grease replenishment variant. Koyo (JTEKT) Japan — OEM automotive bearings for Toyota, Honda, Japanese quality competitive pricing — 6 equivalent brands available under ISO designation 6308.

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Koyo 6308ZZ

Deep Groove Ball Bearings40×90×23 mm — ISO 6308

Dimensions
Bore Diameter (d)40 mm
Outside Diameter (D)90 mm
Width (B)23 mm
Dynamic Load Rating (C)40.2 kN
Static Load Rating (C₀)22 kN
Limiting Speed (grease)8,000 rpm
Mass0.56 kg
Seal TypeDouble Shielded
ClearanceCN
Precision ClassP0
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Technical Specifications

Full specifications for Koyo 6308ZZ per OEM catalog.

Bore Diameter (d)40 mm
Outside Diameter (D)90 mm
Width (B)23 mm
Dynamic Load Rating (C)40.2 kN
Static Load Rating (C₀)22 kN
Limiting Speed (grease)8,000 rpm
Mass0.56 kg
Seal TypeDouble Shielded
ClearanceCN
Precision ClassP0

* Tolerances per ISO. Specifications per OEM catalog.

Cross-Reference — Equivalent Codes

Same ISO 6308 — interchangeable dimensions.

BrandPart Number
Koyo6308ZZ
fag6308-2Z
nsk6308ZZ
ntn6308ZZ
skf6308-2Z
zvl6308-2ZR
nachi6308ZZE
timken6308-2Z

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

Compare 6308 Across Brands

Same interchangeable dimensions — different load ratings and pricing.

BrandSKUd×D×BC (kN)C₀ (kN)
Koyo6308ZZ40×90×2340.222Current
FAG630840×90×2341.8View
FAG6308-2RSR40×90×2341.8View
FAG6308-2Z40×90×2341.8View
Koyo630840×90×2340.2View
Koyo63082RS40×90×2340.2View
NACHI630840×90×2340.6View
NACHI63082NSLE40×90×2340.6View
NACHI6308ZZE40×90×2340.6View

FAQ — Koyo 6308ZZ

Quick answers to common questions.

Koyo 6308ZZ có kích thước d×D×B = 40×90×23 mm theo tiêu chuẩn ISO. Đường kính trong d = 40 mm, đường kính ngoài D = 90 mm, chiều rộng B = 23 mm.

Common Applications

Heavy industryPumps

Deep Groove Ball Bearings with 40mm bore diameter are commonly used in motors 5.5-37kW, centrifugal pumps, air compressors, industrial gearboxes (5.5-37kW range).

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Koyo 6308ZZ
40×90×23 mm
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