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Pillow Block Bearings

Pillow block bearings are mounted bearing units, also known as plummer block units. They typically consist of an insert bearing (UC type), usually a ball bearing with a spherical outer surface; in some cases, spherical roller bearings, cylindrical roller bearings, and other rolling elements may also be used, combined with a housing (pillow block or plummer block). These units use set screw locking or eccentric locking collars for shaft fixation and are equipped with contact seals, multi-lip seals, or grease fittings for relubrication.
Pillow block bearings are designed to:

  • simplify installation and replacement
  • reduce maintenance requirements
  • accommodate shaft misalignment
  • provide stable performance and long service life

BKZ Industry is a professional pillow block bearing manufacturer capable of producing a wide range of units, including UCP, UCPA, and UCPH series, as well as thermoplastic housing units and stainless steel hygienic units.
These bearings are widely used in agriculture, construction machinery, food and beverage, conveyor systems, and material handling equipment. With over 15 years of manufacturing experience and ISO 9001 certification, BKZ Industry provides reliable and cost-effective pillow block bearing solutions for global customers.

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Pillow Block Bearings Are Mounted Bearing Units

Benefits and Advantages of BKZ Industry Pillow Block Bearings

Pillow block bearings provide multiple advantages, including easy installation, self-alignment capability, reduced maintenance costs, extended service life, and reliable radial load performance with moderate axial load capacity. BKZ Industry enhances these benefits through optimized design, material selection, and strict quality control.

Benefits of Pillow Block Bearings

Easier Installation and Replacement

Pillow block bearings are supplied as pre-assembled mounted units that integrate the bearing and housing, allowing quick installation without complex alignment. Simple shaft locking methods such as set screws or eccentric collars, combined with bolt-on housing design, reduce installation time and enable easy replacement without removing the shaft.

Self-aligning Capability

The spherical outer diameter of the insert bearing fits into a matching spherical seat in the housing, allowing automatic compensation for shaft misalignment. This reduces edge stress and uneven load distribution, improving operational stability and preventing premature failure.

Lower Maintenance Cost

Effective sealing systems protect against dust, moisture, and contaminants, while relubrication options help maintain proper lubrication. The simple structure and easy replacement design reduce downtime and maintenance frequency, lowering overall operating costs.

Long Service Life

Optimized load distribution, reduced misalignment stress, and reliable sealing systems help prevent contamination and lubricant loss. These factors ensure stable operation over time and significantly extend the bearing’s service life under real working conditions.

Good Radial Load Capacity with Moderate Axial Load Capability

The bearing inside the unit is designed with optimized internal geometry to support radial loads efficiently, while also accommodating moderate axial loads in both directions. This makes pillow block bearings suitable for a wide range of general industrial applications.

Why Choose BKZ Industry

15+ Years of Manufacturing Experience

BKZ Industry has over 15 years of experience in producing pillow block bearings, supported by mature production lines and a skilled engineering team. This ensures consistent product quality, stable performance, and reliable supply for global customers.

Various Materials for Different Applications

BKZ Industry offers a wide range of material options, including chrome steel and stainless steel for bearing components, as well as cast iron, ductile iron, stainless steel, and thermoplastic housings. Combined with different sealing and cage options, these materials allow the bearings to perform reliably in corrosive, hygienic, or heavy-duty environments.

Customization Ability

BKZ Industry provides customized solutions based on specific application requirements, including material selection, sealing design, internal clearance, and housing structure. OEM and private label services are also supported to meet different market and branding needs.

On Time Delivery Promised

With multiple production facilities and high-capacity manufacturing lines, BKZ Industry ensures efficient production and stable supply. This allows timely delivery to meet project schedules and reduce supply chain risks for customers.

Strict Quality Control

BKZ Industry implements a comprehensive quality control system, including load and life testing, vibration and noise testing, dimensional inspection, material and hardness testing, as well as sealing and reliability testing, ensuring each bearing meets performance and durability requirements.

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Types of Pillow Block Bearings

Pillow block bearings can be classified by housing structure and housing material. Common types include solid pillow block bearings, split pillow block bearings, stainless steel pillow block bearings, and thermoplastic housing units. Below are some of the most common options.

Ucp Pillow Block Bearings

UCP Pillow Block Bearings

UCP pillow block bearings feature a solid cast iron base housing combined with a UC insert bearing and set screw locking. The wide mounting base provides stable support and easy installation. They offer reliable radial load capacity and accommodate slight misalignment, widely used in conveyors, agricultural machinery, and general industrial applications.

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Ucpa Pillow Block Bearings

UCPA Pillow Block Bearings

UCPA pillow block bearings have a more compact housing design with optimized mounting dimensions, making them suitable for installations with limited space. The integrated insert bearing ensures smooth operation and stable load support. They are commonly used in light-duty machinery, small conveyors, and packaging equipment.

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Ucph Pillow Block Bearings

UCPH Pillow Block Bearings

UCPH pillow block bearings feature a higher housing center height, allowing improved shaft positioning in special layouts. The robust housing structure provides stable support under moderate loads. They are suitable for applications requiring higher shaft alignment, such as material handling systems and customized machinery.

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Split Pillow Block Bearings 2

Split Pillow Block Bearings

Split pillow block bearings use a two-piece housing design, allowing easy installation and maintenance without removing the shaft. Typically paired with spherical roller bearings, they support heavy radial and axial loads. Ideal for mining, steel processing, and other heavy-duty industrial equipment.

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Thermoplastic Pillow Block Bearings

Thermoplastic Pillow Block Bearings

These bearings use thermoplastic housings combined with corrosion-resistant insert bearings. The lightweight and non-rusting design provides excellent resistance to moisture, chemicals, and washdown environments. They are widely used in food processing, beverage production, and pharmaceutical equipment.

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Stainless Steel Pillow Block Bearings

Stainless Steel Pillow Block Bearings

Stainless steel pillow block bearings feature fully corrosion-resistant housings and insert bearings, ensuring durability in wet and aggressive environments. They offer long service life and reduced contamination risk, making them suitable for food industry, marine applications, and chemical processing systems.

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*Other types not listed here are also available from BKZ Industry. Please contact us for more details.

Pillow Block Bearings Size Chart

BKZ Industry supplies pillow block bearings in a wide range of sizes and configurations. The models listed here are only part of our available options. For more sizes or customized requirements, please contact us for detailed support.

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Bearing No. B L J H H0 H1 A N N1 De Weight (kg) Bearing Type Housing Type
UCP201 27.4 125 96 30.2 57 14 36 13 19 M10 0.6 UCP201 P201
UCP202 27.4 125 96 30.2 57 14 36 13 19 M10 0.6 UCP202 P202
UCP203 27.4 125 96 30.2 57 14 36 13 19 M10 0.6 UCP203 P203
UCP204 31 127 96 33.3 65 14 38 13 19 M10 0.7 UCP204 P204
UCP205 34.1 140 105 36.5 71 15 38 13 19 M10 0.8 UCP205 P205
UCP206 38.1 165 121 42.9 83 17 48 17 23 M14 1.3 UCP206 P206
UCP207 42.9 167 127 47.6 93 18 48 17 23 M14 1.6 UCP207 P207
UCP208 49.2 184 137 49.2 100 18 54 17 23 M14 1.9 UCP208 P208
UCP209 49.2 190 146 54 106 20 54 17 23 M14 2.2 UCP209 P209
UCP210 51.6 206 159 57.2 114 21 60 20 26 M16 2.6 UCP210 P210
UCP211 55.6 219 171 63.5 126 23 60 20 26 M16 3.3 UCP211 P211
UCP212 65.1 241 184 69.8 138 25 70 20 26 M16 4.6 UCP212 P212
UCP213 65.1 265 203 76.2 151 27 70 25 31 M20 5.9 UCP213 P213
UCP214 74.6 266 210 79.4 157 27 72 25 31 M20 6.6 UCP214 P214
UCP215 77.8 275 217 82.6 163 28 74 25 31 M20 7.4 UCP215 P215
UCP216 82.6 292 232 88.9 175 30 78 25 31 M20 9 UCP216 P216
UCP217 85.7 310 247 95.2 187 32 83 25 31 M20 11 UCP217 P217
UCP218 96 327 262 101.6 200 33 88 27 33 M22 13 UCP218 P218
UCP220 100 380 308 115 225 40 95 30 38 M24 16 UCP220 P20
UCP305 38 175 132 45 85 15 45 17 20 M14 1.4 UCP305 UCP305
UCP306 43 180 140 50 95 18 50 17 20 M14 1.8 UCP306 UCP306
UCP307 48 210 160 56 106 20 56 17 25 M14 2.8 UCP307 UCP307
UCP308 52 220 170 60 116 22 60 17 27 M14 3 UCP308 UCP308
UCP309 57 245 190 67 129 24 67 20 30 M16 4.1 UCP309 UCP309
UCP310 61 275 212 75 143 27 75 20 35 M16 5.8 UCP310 UCP310
UCP311 66 310 236 80 154 30 80 20 38 M16 7.4 UCP311 UCP311
UCP312 71 330 250 85 165 32 85 25 38 M20 9.4 UCP312 UCP312
UCP313 75 340 260 90 176 33 90 25 38 M20 10 UCP313 UCP313
UCP314 78 360 280 95 187 35 90 27 40 M22 12 UCP314 UCP314
UCP315 82 380 290 100 198 35 110 27 40 M22 14 UCP315 UCP315
UCP316 86 400 300 106 210 40 110 27 40 M22 18 UCP316 UCP316
UCP317 96 420 320 112 220 40 110 33 45 M27 20 UCP317 UCP317
UCP318 96 430 330 118 235 45 110 33 45 M27 24 UCP318 UCP318
UCP319 103 470 360 125 250 45 120 36 50 M30 29 UCP319 UCP319
UCP320 108 490 380 140 275 50 120 36 50 M30 35 UCP320 UCP320

Where Are Pillow Block Bearings Used?

Pillow block bearings are widely used in industries that require reliable shaft support, easy maintenance, and stable performance under different operating conditions.

FAQs About Pillow Block Bearings

Q1. What Is the Difference Between Plummer Block and Pillow Block Bearings?

The main difference is in their size, construction, and typical usage. Pillow block bearings are usually smaller mounted bearing units with solid housings, mainly used in general industrial applications. Plummer blocks are usually larger bearing housings, often split into two parts, and are more suitable for heavy-duty applications where easier inspection, maintenance, and replacement are required.

A pillow block bearing is also commonly called a plummer block bearing or a mounted bearing unit, depending on the housing design and regional usage.

In most cases, new pillow block bearings are already pre-greased, so additional grease is not required before initial installation. However, proper relubrication may still be needed during operation depending on the working conditions and bearing design.

Spherical pillow block bearings usually refer to pillow block housings fitted with spherical roller bearings or self-aligning bearing designs. They are designed to accommodate misalignment, support high radial loads, and perform reliably in harsh and heavy-duty operating conditions.

Heavy-duty pillow block bearings are usually made with reinforced cast iron or ductile iron housings and are combined with larger insert bearings or spherical roller bearings to provide stronger shaft support. They are designed for applications involving higher loads, shock, vibration, and demanding working environments.

Linear pillow block bearings are mounted linear motion units consisting of a housing and an internal linear bearing insert, usually ball-type or plain-type, designed to run on round shafts. They provide smooth linear movement, easy installation, compact structure, and stable guidance. They are commonly used in automation equipment, packaging machines, sliding tables, CNC systems, and other linear motion applications.

High temperature pillow block bearings are mounted bearing units designed for operating temperatures typically ranging from about 150°C to 350°C. They consist of a heat-resistant insert bearing mounted in a housing, using high-temperature grease, thermally stabilized components, and suitable seal or shield designs. They provide reliable shaft support and longer service life in ovens, dryers, furnaces, bakeries, and other hot-processing equipment.

These sizes refer to the shaft diameter that the pillow block bearing is designed to fit. For example, a 1 inch pillow block bearing is made for a 1 inch shaft, while a 1-1/4 inch unit is designed for a 1-1/4 inch shaft.

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Comprehensive Bearing Solutions from BKZ Industry

In addition to pillow block bearings, BKZ Industry supplies a comprehensive range of bearing products to meet different application requirements across various industries.

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Send us the product name, model number, quantity, drawing, dimensions, application details, or any available information. Our team will review your requirements and reply soon with pricing and suitable solutions. Use the form below or contact us at sales@bkzindustry.com or +86 18901426056 (WhatsApp/phone).