Product Introduction

232 Series Spherical Roller Bearings are widened‑section double‑row spherical Roller Bearings for large bore sizes, designed for heavy‑duty large‑shaft‑diameter working conditions. Spherical outer‑ring raceway and double‑row barrel‑shaped rollers deliver 1.0‑1.5° self‑aligning capability to compensate assembly misalignment caused by shaft deflection and housing deformation. It features high radial load capacity, large bidirectional axial load and excellent shock resistance, while limiting speed decreases compared with 230 and 231. Straight‑bore and 1:12 tapered‑bore K versions are available; nearly all sizes are equipped with W33 grease groove and holes. Precision grades P0 and P6. Applied for heavy‑duty equipment with large shaft diameter, heavy shock‑load and low‑speed requirement.

Brief comparison: 230 narrow‑section good‑speed low‑load; 231 medium‑width well‑balanced; 232 widened‑section for further improved load with reduced speed capacity; 239 ultra‑narrow section with limited load. Suitable for large‑shaft‑diameter machinery with allowable wider housing width and high‑load priority.

Specifications

Bore range:110‑600mm (model range 23222‑232/600). Versus 231 with same bore, load capacity increases 15‑25%, width rises significantly and limiting speed drops 10‑20%.

Reference Model:23244CA/W33

‑ Bore d:220mm

‑ Outer diameter D:370mm

‑ Width B:142mm

‑ Basic dynamic load Cr:1290kN

‑ Basic static load Cor:1680kN

‑ Limiting speed(grease):950r/min

‑ Limiting speed(oil):1200r/min

 Withdrawal sleeves are widely used for large‑bore tapered‑bore bearings. Strictly monitor clearance during assembly; over‑preload is forbidden.

Material, Model & Suffix Explanation

Inner / outer rings and rolling elements: vacuum‑degassed GCr15 bearing steel; electroslag‑remelted steel for extra‑large sizes. Quenched‑tempered hardness HRC 58‑62.

Cage:

‑ CA solid brass cage, standard for heavy‑duty shock‑loaded conditions;

‑ CC stamped‑steel cage rarely adopted for large bore;

‑ E/E1 optimized roller profile for higher load rating.

Suffixes

‑ K:1:12 tapered bore;

‑ W33: outer‑ring grease groove & lubrication holes;

‑ C2/C3/C4 radial clearance; C3 general purpose, C4 for shock‑vibration.

Typical model: 23244CAK/W33C4: 232 series, solid brass cage, tapered bore, W33 grease groove, C4 increased clearance.

Manufacturing Process

1. Ultrasonic raw‑material inspection for internal defects of large forgings;

2. Hot die forging for continuous metal flow‑lines of widened‑section raceway;

3. Controlled staged quenching‑tempering to minimize heat‑treatment distortion of wide large rings;

4. Turning to guarantee strict geometric tolerance for ribs and raceways;

5. Superfinishing of rollers and raceways to optimize contact profile and reduce stress concentration;

6. High‑precision clearance grouping‑matching and thorough W33‑groove deburring;

7. Finished‑product non‑destructive inspection, dimension‑clearance‑vibration test, multi‑point‑support cleaning and anti‑rust packaging.

Application Scenarios

Heavy‑duty equipment with large shaft diameter, allowable wide installation space, heavy load & strong shock, low‑speed requirement.

‑ Metallurgy: heavy‑duty roller tables, rotary mechanisms

‑ Building‑material: large rotary kilns, ball mills

‑ Mining: large crushers, rotary drum equipment

‑ Heavy machinery: heavy‑duty low‑speed gearboxes

W33 for on‑site re‑lubrication maintenance; downgrade to 231 if higher speed is required; select C4 clearance for heavy shock‑vibration.

Installation Guidelines

1. Max thermal‑mount heating ≤110 ℃. Ensure uniform heating for large bearings. Open‑flame prohibited. Strike only bearing end faces.

2. Tighten withdrawal sleeve step‑by‑step in multiple passes for tapered‑bore bearings, re‑measure clearance each pass.

3. Appropriately increase mounting interference under shock‑load conditions to prevent slipping damage.

4. Align W33 grease groove precisely with housing lubrication passages.

5. Manually rotate shaft after assembly; perform no‑load running‑in with normal temperature rise before full‑load operation.

After‑sales Maintenance

1. Lubrication: heavy‑duty extreme‑pressure lithium grease, fill cavity 1/3‑2/3. Periodically re‑grease to replace aged grease. Over‑filling‑caused overheating is strictly forbidden.

2. Inspection: temperature rise ≤+40 ℃ above ambient. Immediate shut‑down upon abnormal noise or sharp temperature rise.

3. Storage: large‑size bearings stored horizontally with multi‑point support. Vertical placement forbidden. Keep moisture‑proof and rust‑proof.

4. Failure modes: raceway spalling from overload; rib wear due to excessive axial force; abrasive wear from seal failure; cage damage caused by improper mounting.

Selection Notes

232 achieves higher load capacity via widened‑section design at cost of speed performance. Choose 231 for higher‑speed demand. Add thrust bearings for large axial load. Reinforce sealing under harsh operating conditions.