Spherical Roller Bearings

240 Series Spherical Roller Bearings

The 240 series spherical roller bearings are constructed with thin outer ring walls paired with extra-wide barrel roller assemblies, balancing compact radial installation space and significantly elevated load-carrying capacity. Compared with the 230 thin-section range, the extended roller profile delivers enhanced radial load resistance while retaining slim overall radial dimensions.

Built-in self-aligning functionality readily compensates for mounting misalignment and shaft deflection to prevent accelerated wear during steady operation. A full range of cage configurations including CC stamped steel, E optimized internal design, and solid brass CA & MB variants are available to accommodate continuous low-speed, heavy-load operating conditions.

This series is widely specified for large drying vessels, oversized paper machine rolls, low-speed heavy metallurgical processing equipment, and heavy-duty turntable supports with restricted radial assembly clearance.

Size range: Inner Diameter: 170-700mm

Material: GCr15/GCr15SiMn/G20Cr2Ni4A

Load Capacity: High radial and axial load capacity

Cage Types: CC / E /CA / MB / others

1. What Are 240 Series Spherical Roller BearingsThe 240 series are double-row spherical roller bearings with ultra-thin cross-section and extra width. They feature extra-large bore diameters and slim outer rings with flat, wide cross-sections, tailor-made for hollow large-diameter transmission shafts, and act as core bearings for lightweight large heavy-load equipment.2. Nomenclature of 240 Series Spherical Roller BearingsExample: 24080CAK30/W33 - 240: Series code – the digit "2" means double-row rollers; "40" refers to ultra-thin, extra-wide large-bore design - 80: Bore size code, bore diameter 400 mm; suffix K30 indicates tapered bore with a taper ratio of 1:30 - CA: Brass cage

- W33: Lubrication groove on the outer ring

3. Characteristics of 240 Series Spherical Roller Bearings- Slim outer ring design, the optimal choice for equipment with restricted overall outer diameter dimensions

- Extra-wide double-row rollers achieve high load capacity even with thin cross-section - Allows mounting through large hollow shafts to simplify the spindle structure of machinery - Versions with 1:30 tapered bore match heavy-duty adapter sleeves for easy assembly and disassembly on large shafts

- Light self-weight, significantly cutting the total mass of large rotary equipment

4. Applications of 240 Series Spherical Roller BearingsGiant dryer cylinders of large paper machines, casting-rolling rolls for aluminum processing, large film stretching rollers, heavy marine transmission shafts, large rotary drying drums

Series	Bearing Models	d (mm)	D (mm)	T (mm)	Approx Weight (KGS)
24020	24020CC / 24020E / 24020CA / 24020MB	100	150	50	2.94
24022	24022CC / 24022E / 24022CA / 24022MB	110	170	60	4.88
24024	24024CC / 24024E / 24024CA / 24024MB	120	180	60	5.2
24026	24026CC / 24026E / 24026CA / 24026MB	130	200	69	7.75
24028	24028CC / 24028E / 24028CA / 24028MB	140	210	69	8.25
24030	24030CC / 24030E / 24030CA / 24030MB	150	225	75	10.5
24032	24032CC / 24032E / 24032CA / 24032MB	160	240	80	13
24034	24034CC / 24034E / 24034CA / 24034MB	170	260	90	17
24036	24036CC / 24036E / 24036CA / 24036MB	180	280	100	22.5
24038	24038CC / 24038E / 24038CA / 24038MB	190	290	100	23
24040	24040CC / 24040E / 24040CA / 24040MB	200	310	109	30
24044	24044CC / 24044E / 24044CA / 24044MB	220	340	118	39
24048	24048CC / 24048E / 24048CA / 24048MB	240	360	118	42
24052	24052CC / 24052E / 24052CA / 24052MB	260	400	140	65.5
24056	24056CC / 24056E / 24056CA / 24056MB	280	420	140	68
24060	24060CC / 24060E / 24060CA / 24060MB	300	460	160	96
24064	24064CC / 24064E / 24064CA / 24064MB	320	480	160	100
24068	24068CC / 24068E / 24068CA / 24068MB	340	520	180	136
24072	24072CC / 24072E / 24072CA / 24072MB	360	540	180	142
24076	24076CC / 24076E / 24076CA / 24076MB	380	560	180	150
24080	24080CC / 24080E / 24080CA / 24080MB	400	600	200	190
24084	24084CC / 24084E / 24084CA / 24084MB	420	620	200	205
24088	24088CC / 24088E / 24088CA / 24088MB	440	650	212	230
24092	24092CC / 24092E / 24092CA / 24092MB	460	680	218	270
24096	24096CC / 24096E / 24096CA / 24096MB	480	700	218	284

Production Process

Blueprint · Designing Precision

Given the structural characteristics of crossed roller bearings (rollers arranged in a 90° cross pattern), our technical team uses 3D CAD and finite element analysis (FEA) software to accurately calculate raceway angles, spacing, and interference.

Customizing products based on customer operating conditions, we benchmark against P2/P4/P5 tolerance classes and simulate post-assembly rotational precision in advance. The blueprint serves as the sole standard guiding all subsequent turning, grinding, and inspection processes.

Turning & Grinding · Rough to Mirror

Turning and grinding are the core processes that determine the bearing's geometric precision. We use high-rigidity CNC lathes for step-by-step ring processing, ensuring basic inner/outer diameter and raceway dimensions through rough, semi-finish, and finish turning while leaving grinding allowances.

We employ plunge grinding with formed grinding wheels for the V-shaped raceways of crossed roller bearings, and perform combination matching for the split inner/outer rings to ensure rotational plane runout meets P5 or higher standards.

Assembly · Interlocking Precision

The assembly of crossed roller bearings is more delicate than standard bearings: rollers must be arranged in an alternating cross pattern and precisely guided by spacers or cages.

All components are ultrasonically cleaned, dried, and grouped according to measured dimensions. High rigidity and stable torque are then imparted to the crossed roller bearings through negative clearance or preload adjustments. Assembly is completed in a constant temperature and humidity cleanroom to ensure P4/P2 level precision.

Inspection · Not Missing a Micron

As tolerance classes P5, P4, and P2 become progressively stricter, our inspection equipment and processes are upgraded accordingly:

We use high-precision roundness measuring instruments for dimensional tolerances, dial indicators with dedicated test mandrels for radial and axial runout, profilometers and Coordinate Measuring Machines (CMM) to verify raceway profiles and angles, and dedicated clearance and torque testers to determine clearance and starting torque.

Packaging · Anti-Rust & Protection

The packaging process is equally strict, ensuring zero loss of precision for the crossed roller bearings from the factory until pre-installation.

Eco-friendly anti-rust oil is evenly sprayed to ensure no residual particles in the inner cavity. Each bearing is vacuum-sealed in a thickened PE bag and film for water and dust protection, then boxed using wrapping tape. The outer carton is lined with high-density foam and pearl cotton to prevent transport collisions, and is marked with the model, precision grade (P5/P4/P2), and production batch number.