Split bearings play a crucial role in the installation and maintenance of large industrial equipment due to their unique advantage—the inner ring, outer ring, and rolling elements are all separable. The following systematically outlines the classification, models, precision, and clearance classes of split bearings, as well as common application industries, equipment, and corresponding models.

I. Classification of Split Bearings: Split bearings are mainly divided into the following three core structural types:

Fully Split Cylindrical Roller Bearings
Features: The inner ring, outer ring, cage, and cylindrical rollers are all divided into two halves (axial or radial). They can be directly clamped onto the shaft during installation without axial sliding or positioning from the shaft end.

Advantages: Ideal for applications where shaft end installation is not possible (e.g., intermediate drive shafts, crankshafts).

Split Spherical Roller Bearings (Self-Aligning Split Bearings)
Features: Equipped with two rows of spherical rollers, capable of compensating for large shaft deflections and misalignment.

Advantages: Combines the high load-carrying capacity of traditional spherical roller bearings with the inherent ease of maintenance of a split design.

Split Tapered Roller Bearings

Features: Utilizes tapered rollers, enabling simultaneous bearing of large radial loads and bidirectional axial loads.

II. Split Bearing Model Naming and Meaning

Since split bearings are typically specialized products (e.g., from internationally renowned brands such as Cooper, SKF, and Timken), their model names usually consist of a prefix, size code (inner diameter), type/series code, and suffix (indicating cage type, seals, etc.). Taking industry-standard Cooper split bearings and general industrial models as examples, the components of the model name represent the following information:

1. Prefix/Series Code (indicating the bearing’s outer diameter and width series): For example, 01 series (light), 02 series (medium), 03 series (heavy).

2. Size Code (indicating the bearing’s inner diameter): These numbers typically correspond to a specific inner diameter dimension. For example, in some standards, numbers directly represent dimensions in inches, or dimensions in millimeters using specific conversion factors (e.g., “04E” or specific shaft diameter codes, such as “100” for a 100 mm shaft, or inch codes, such as “040” for 4 inches).

3. Meaning of structural and material suffixes: GR: Generally indicates a bearing assembly with specific internal clearance or positioning characteristics. EX: Indicates a special high-strength metal cage (e.g., a brass cage). C: Generally indicates a specific clearance class or optimized internal geometry. Split bearing housing codes (e.g., SAF, SD, and SN series): Split bearings are usually supplied as a set with split bearing housings; the model number includes the corresponding housing code to specify cast iron or ductile iron split bearing housings.

III. Precision and Clearance Grades

1. Precision Grade (Tolerance Grade): Due to the unique manufacturing process of split bearings involving segmented interface fits, their precision system differs slightly from standard bearings, but generally follows ISO standards: Ordinary Grade (code usually omitted; equivalent to ISO Ordinary/P0): Suitable for most conventional industrial transmission, conveying, and fan equipment, meeting standard operating requirements. High Precision Grade (P6/P5): Specifically designed for high-speed operation and demanding heavy-duty industrial spindles with strict runout requirements. The high precision of split bearings primarily ensures the roundness and smooth transition of the segmented interfaces after assembly.

2. Clearance Grade (Internal Clearance): Because split bearings are mounted on fixed shafts, their internal clearance is highly sensitive to thermal expansion and contraction and load conditions: C0 (Standard Clearance/Omitted): Suitable for standard operating temperatures and medium operating conditions. C3/C4 (Increased Clearance): The most commonly used clearance grade for split bearings. Since the temperature rise of the inner ring is usually greater than that of the outer ring during operation, C3/C4 clearance effectively prevents bearing seizure caused by thermal expansion.

IV. Common Application Industries, Equipment, and Corresponding Split Bearing Models:

Split bearings are most commonly used in complex mechanical components where the shaft end cannot pass through the bearing, making disassembly extremely difficult and resulting in very high downtime costs. Application Industries | Typical Equipment | Examples of Commonly Used Split Bearing Series/Models | Ports & Marine | Marine Propulsion Shafts, Large Crane Winches, Quay Cranes (STS) | Cooper 02/03 Series (e.g., 02B 100 GR, suitable for intermediate supports of long drive shafts) | Mining & Cement | Belt Conveyor Drive Wheels, Large Ball Mills, Mineral Processing Plant Hoists | SKF/Cooper Split Spherical Roller Bearing Series (e.g., for heavy-duty drive shafts) | Power & Energy | Coal Feeders in Thermal Power Plants, Large Fans, Cooling Tower Fans, Auxiliary Positions of Wind Turbine Main Shafts | Medium to Large Split Bearing Housing Assemblies (e.g., series compatible with SN/SD split bearing housings) | Metallurgy & Steel | Continuous Casting Machines (Roll Tables), Intermediate Roll Tables for Hot/Cold Rolling Mills | High-Temperature and Moisture-Resistant Split Cylindrical Roller Bearings (typically with high-strength brass cages, marked “EX”) | Pulp, Paper & Chemicals | Paper machine drying section rollers, large agitators, compressor crankshafts | Cooper/Timken special split bearings (solving problems such as high temperatures and difficult disassembly in confined spaces in the drying section).