1. Design & Construction
The 23964 bearing features a spherical outer ring raceway, two rows of symmetrical spherical rollers, and a robust cage. The spherical raceway allows the bearing to self‑align, compensating for up to 1.5°–3° of angular misalignment, which reduces edge stresses and prolongs service life.
Common suffixes:
CA: Symmetrical rollers guided by a machined brass cage. Provides high load capacity, good shock resistance, and low friction.
W33: Oil grooves and three lubrication holes in the outer ring enable easy relubrication without dismantling the equipment.
C3: Increased internal radial clearance for applications with higher operating temperatures or interference fits.
2. Key Features
High Radial Load Capacity – Optimized internal geometry and roller design support heavy loads and shock loads.
Self‑Aligning – Compensates for shaft deflection and mounting errors, simplifying installation.
Compact Design – Narrow width relative to bore size allows space‑saving arrangements.
Enhanced Lubrication (W33) – Integrated lubrication features improve grease replenishment and extend maintenance intervals.
Long Service Life – Manufactured from high‑quality bearing steel, heat‑treated for dimensional stability and wear resistance.
3. Technical Specifications (Reference)
Parameter | Value |
|---|
Model | 23964 |
Bore Diameter (d) | 320 mm |
Outer Diameter (D) | 440 mm |
Width (B) | 90 mm |
Basic Dynamic Load Rating (C) | ≈ 1,250 kN (manufacturer dependent) |
Basic Static Load Rating (C₀) | ≈ 2,700 kN |
Limiting Speed – Grease | ≈ 900 r/min |
Limiting Speed – Oil | ≈ 1,100 r/min |
Note: Values may vary by brand (SKF, FAG, NSK, TIMKEN, etc.).
4. Applications
Wind turbines (main shafts, gearboxes)
Marine propulsion systems
Large industrial gearboxes
Mining and mineral processing equipment
Paper making machinery
Rubber and plastic extrusion lines
5. Interchangeability
The 23964 bearing follows ISO dimensions and is interchangeable with equivalent models from major manufacturers. When selecting, confirm suffixes (e.g., CA/W33, C3) and clearance class to match application requirements.
Same Type – Related Bearing Models
The 23964 belongs to the spherical roller bearing family. Below are common series and specific models of the same type, particularly within the 23900 series (narrow cross‑section, high capacity) and other popular spherical roller bearing series.
Suffix | Meaning |
|---|
CA | Machined brass cage, symmetrical rollers, high load capacity |
CC | Window-type steel cage, improved lubrication, lower friction |
W33 | Lubrication groove and holes in outer ring |
C3 | Radial internal clearance greater than normal (for higher temperatures or interference fits) |
C4 | Even greater clearance than C3 (extreme conditions) |
MB | Machined brass cage guided on inner ring |
EM | Machined brass cage, optimized internal design (often in SKF) |
23900 Series (Compact, High Capacity)
Model | Bore (mm) | Outer (mm) | Width (mm) |
|---|
23944 | 220 | 300 | 60 |
23948 | 240 | 320 | 60 |
23952 | 260 | 360 | 75 |
23956 | 280 | 380 | 75 |
23960 | 300 | 420 | 90 |
23964 | 320 | 440 | 90 |
23968 | 340 | 460 | 90 |
23972 | 360 | 480 | 90 |
23976 | 380 | 520 | 100 |
23980 | 400 | 540 | 106 |
23000 Series (Standard Width)
Model | Bore (mm) | Outer (mm) | Width (mm) |
|---|
23064 | 320 | 480 | 121 |
23068 | 340 | 520 | 133 |
23072 | 360 | 540 | 134 |
24000 Series (Extra Heavy, Wide Width)
Model | Bore (mm) | Outer (mm) | Width (mm) |
|---|
24064 | 320 | 480 | 160 |
24068 | 340 | 520 | 180 |
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