FAGI 22215 CAKW33 Spherical Roller Bearing
The FAGI 22215 CAKW33 is a premier double-row spherical roller bearing engineered to metric boundary dimensions: 75 mm bore diameter (d), 130 mm outside diameter (D), and a 31 mm nominal width (B). Formulated for heavy industrial machinery operating under severe operational duress, its structural hallmark is a common spherical raceway on the outer ring that allows unconstrained angular adjustment. This inherent self-aligning capability permits the bearing to self-compensate for up to 1.5° to 2° of structural frame misalignment, shaft flexure, or elastic housing deformation without inducing parasitic edge stresses across the rolling contact zones.
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Product Detail
Technical Specifications & Engineering Overview: FAGI 22215 CAKW33 Spherical Roller Bearing Standard Metric Dimensions (75x130x31 mm) | Solid Machined Brass Cage (CA) | Tapered Bore 1:12 (K) | Annular Lubrication Groove & Three Holes (W33)
Manufactured from ultra-high-purity, through-hardened 100Cr6 (AISI 52100) alloy bearing steel. Engineered to accommodate ultra-heavy dynamic radial loads, severe cyclic impact shocks, and autonomous angular shaft misalignment across primary crushers, heavy industrial gearboxes, vibrating screens, and heavy-duty conveyor drive lines.
Engineering Overview & Structural Architecture: FAGI 22215 CAKW33
The FAGI 22215 CAKW33 is a premier double-row spherical roller bearing engineered to metric boundary dimensions: 75 mm bore diameter (d), 130 mm outside diameter (D), and a 31 mm nominal width (B). Formulated for heavy industrial machinery operating under severe operational duress, its structural hallmark is a common spherical raceway on the outer ring that allows unconstrained angular adjustment. This inherent self-aligning capability permits the bearing to self-compensate for up to 1.5° to 2° of structural frame misalignment, shaft flexure, or elastic housing deformation without inducing parasitic edge stresses across the rolling contact zones.
Belonging to the globally standardized 222 Series, this design delivers an optimum synergy between massive dynamic radial load ratings ($C_r$) and dependable rotational velocity ceilings. The internally symmetrical barrel rollers with maximized contact lengths ensure Hertzian contact pressures are uniformly distributed along the raceway profile, significantly suppressing micro-spalling and premature rolling contact fatigue under severe cyclic reverse loads.
Technical Designation Anatomy (FAGI 22215 CAKW33)
Dual rows of barrel-shaped rollers capable of supporting ultra-high radial forces accompanied by simultaneous bidirectional thrust/axial loads.
Calculated via standard metric bearing nomenclature ($15 \times 5 = 75\text{ mm}$); tailored for intermediate transmission shafts and primary drives.
Precision-machined one-piece brass cage with retaining flanges on the inner ring, delivering exceptional yield strength against severe vibration and dynamic shock loads.
Internal 1:12 taper enabling rapid mounting, demounting, and precise radial internal clearance adjustment via adapter sleeves (e.g., H 315 series).
Circumferential lubrication groove and three oil/grease feed ports positioned in the outer ring for uniform lubricant delivery straight to both roller sets.
Dimensional, Mechanical & Metallurgical Specifications
| Technical Parameter | Value / Specification | Functional Mechanical Impact |
|---|---|---|
| Bore Diameter (d) | 75 mm | Tapered 1:12 bore engineered for direct mounting on tapered journals or via H 315 adapter sleeves on plain shafts. |
| Outside Diameter (D) | 130 mm | Standard ISO outer diameter compatible with split plummer block housings (SNL / SN / SNG 515 series). |
| Overall Width (B) | 31 mm | Offers optimum structural stability and provides prolonged roller-raceway line contact for uniform load dispersal. |
| Cage Architecture | CA Design (Machined Brass) | Exceptional damping, low frictional heat, and complete resistance to fatigue cracking under continuous high vibration. |
| Lubrication Circuit | Standard W33 Facility | Direct lubricant feed into the rolling zone, ensuring efficient purging of oxidized grease and lower operational temperature. |
| Ring & Roller Metallurgy | 100Cr6 Chromium Steel (AISI 52100) | Through-hardened to 60–64 HRC; outstanding microstructural stability and high rolling contact fatigue (RCF) resistance. |
| Self-Aligning Capability | Up to 1.5° to 2° | Eliminates parasitic edge loading caused by dynamic shaft deflection and housing misalignment. |
Engineering Advantages & Operational Superiority of FAGI 22215 CAKW33
1. Machined Brass Solid Cage (CA Type)
Unlike pressed sheet-steel cages prone to high-frequency fatigue fractures, the precision-machined brass cage features high tensile and shear strength, running quietly and smoothly under severe shock impacts and variable speeds.
2. Flexible Assembly & Clearance Tuning (K Bore)
The 1:12 tapered bore allows reliable mounting onto straight commercial shafts using an H 315 adapter sleeve. It enables precise, measured reduction of radial internal clearance using feeler gauges to achieve optimal operating preload.
3. Centralized Lubrication Routing (W33)
Equipped with an annular groove and 3 radial ports on the outer circumference, fresh grease or recirculating oil flows directly between the two roller assemblies, flushing out debris and minimizing friction-induced thermal build-up.
4. Inherent Misalignment Compensation
The continuous spherical outer raceway accommodates dynamic angular shaft deflection without increasing local Hertzian stress peaks, extending operating life in vibrating and heavily loaded industrial equipment.
Primary Industrial Applications & Target Equipment
- Mining Machinery, Vibrating Screens & Cone/Jaw Crushers: Brass cage durability provides supreme resistance against continuous high-amplitude vibrational shocks.
- Heavy Belt Conveyor Pulleys & Drive Drums: Installed inside SNL 515 split plummer block housings using H 315 adapter sleeves in steel and cement processing plants.
- Heavy Industrial Reduction Gearboxes: Provides rigid, high-capacity support for intermediate and output gear shafts under cyclic torque reversals.
- Industrial Exhaust Fans, Heavy Blowers & Air Washers: Ensures smooth, vibration-free rotation and high thermal stability under continuous operational cycles.
- Pulp & Paper Processing Equipment, Calender Rolls: Mitigates cyclic shaft deflection while supporting combined axial-radial loading.
Installation Directives & Workshop Warning (Tapered Bore "K" Series)
Due to the 1:12 tapered bore (K), driving the bearing onto an adapter sleeve or tapered journal expands the inner ring, progressively reducing internal radial clearance. Failure to gauge residual clearance during locknut torqueing can lead to zero internal clearance, resulting in instant overheating, micro-welding, and catastrophic roller seizure upon initial startup under load.
- Radial Clearance Gauging Protocol: Prior to mounting, measure initial unmounted radial clearance between the uppermost roller and the outer ring using calibrated feeler gauge blades. Drive the inner ring up the taper until the measured clearance reduction complies precisely with ISO standards for 222-series bearings, ensuring both roller sets rotate freely.
- Induction Heating Temperature Limit: When mounting the bearing onto a stepped tapered shaft using thermal expansion, ensure the induction heater temperature does not exceed 120°C (248°F). Heating with open torch flames is strictly prohibited as it destroys the metallurgical structure of 100Cr6 steel and causes thermal distortion of the brass cage.
- Lubricant Selection & Initial Grease Pack: In open-housing configurations, pack 100% of the internal free volume of the bearing and 30% to 50% of the split housing cavity with a high-performance Extreme Pressure (EP) lithium complex industrial grease.
- Lock washer Retention: After verifying final residual clearance, align a tab of the MB lock washer with a slot in the KM locknut and bend it securely into position to prevent vibration-induced loosening during equipment operation.
FAGI Metallurgical Integrity & Quality Assurance
Because 22215 spherical roller bearings are deployed across critical plant bottlenecks and severe transmission junctions, uncertified alternatives made from low-grade carbon steel risk sudden inner ring splitting under adapter expansion and rapid cage destruction under vibration.
FAGI 22215 CAKW33 bearings are fabricated exclusively from vacuum-degassed 100Cr6 bearing alloy steel and engineered with precision-balanced machined brass cages, guaranteeing dimensional stability, high fatigue resilience, and extended service intervals in continuous plant operations.
Price Inquiries, Technical Consultation & Bulk Orders
Contact our KGICO engineering sales department for technical datasheets, bearing life calculations, and commercial enterprise supply arrangements.
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