UCP300 Series Pillow Block Bearing Units

UCP300 Series Pillow Block Bearing Units

Heavy duty cast iron pillow block bearing units with setscrew locking, shaft bore 25–140 mm. Maximum radial load capacity in the standard cast iron pillow block range. New-client samples 1–5 pcs at sample price. Multi-model orders from USD 1,500. Retail 1–2 pcs not accepted. Engineering drawings required — catalogue for reference only.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

SKU: GBC-UCP300 Categories: , Tags: , , ,
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UCP300 Series Pillow Block Bearing Units — Heavy Duty, Setscrew Locking, 25–140 mm

The UCP300 series represents the maximum radial load capacity available in a cast iron two-bolt pillow block configuration. Designed for demanding applications in mining, cement processing, heavy agricultural machinery, and bulk material handling, this series scales from 25 mm (UCP305) to 140 mm shaft diameter (UCP328) — the largest pillow block bore in the standard cast iron mounted bearing range. At the upper end of the series, units weigh up to 89 kg, reflecting the mass of housing required to maintain structural integrity under heavy belt tensions and large shaft overhangs.

UCP300 series heavy duty pillow block bearing unit cast iron setscrew locking 25 to 140mm shaft

Heavy-Duty Housing Design

The UCP300 housing is engineered with a fundamentally different cross-section geometry than the standard and medium-duty series. The flange foot width, the housing wall thickness at the bearing seat, and the bridge section between the mounting bolt holes are all substantially increased relative to the UCPX00 medium-duty equivalent. At bore sizes from UCP316 upward (80 mm+), the UCP300 series approaches the load territory normally served by split plummer blocks (SN series), but in a two-bolt drop-in format that is significantly faster to install and replace.

UCP300 heavy duty pillow block dimensional drawing H L J A bolt specifications

Key Features

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Maximum Load Cast Iron Housing

Heaviest housing cross-section in the standard pillow block cast iron range. From UCP305 (1.4 kg) to UCP328 (89.1 kg) — full coverage for the heaviest two-bolt pillow block applications.

🔧

Proven Setscrew Retention

Dual setscrews at 120° — same retention geometry used across the entire UCP family. No crew retraining for UCP300 units.

↔

Wide Inner Ring for Demanding Conditions

UC300 series insert bearings carry significantly higher C and C0 ratings than UC200 equivalents.

▭

Hollow Base Standard / Solid Base Available

Hollow base standard. Solid base (SB) available on request — relevant for UCP316 and above.

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Re-lubrication Under Load

Grease fittings accessible at 45° standard. At UCP318 and above, 90° fittings are increasingly practical.

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Pure Metric Bore Range

UCP300 uses metric bore only. Shaft diameter is the model suffix: UCP305 = 25 mm, UCP328 = 140 mm.

Full Dimensional Specifications

Unit No. d mm H mm L mm J mm A mm N mm N1 mm H1 mm H0 mm B mm S mm Bolt kg
UCP305 25 45 175 132 45 17 20 16 85 38 15 M14 1.40
UCP306 30 50 180 140 50 17 20 18 95 43 17 M14 1.80
UCP307 35 56 210 160 56 17 25 20 106 48 19 M14 2.80
UCP308 40 60 220 170 60 17 25 24 116 52 19 M14 3.08
UCP309 45 67 245 190 67 20 30 25 129 57 22 M16 4.10
UCP310 50 75 275 212 75 20 35 27 143 61 22 M16 6.00
UCP311 55 80 310 236 80 20 38 30 154 66 25 M16 7.40
UCP312 60 85 330 250 85 25 38 32 165 71 26 M20 9.40
UCP313 65 90 335 260 90 25 38 33 176 75 30 M20 10.00
UCP314 70 95 360 280 90 27 40 35 187 78 33 M22 12.00
UCP315 75 100 380 290 100 27 40 35 198 82 32 M22 14.00
UCP316 80 106 400 300 110 27 40 40 210 86 34 M22 18.00
UCP317 85 112 420 320 110 33 45 40 220 96 40 M27 20.00
UCP318 90 118 430 330 110 33 45 45 235 96 40 M27 24.00
UCP319 95 125 470 360 120 36 50 46 250 103 41 M30 26.50
UCP320 100 140 490 380 120 36 50 50 275 108 42 M30 34.30
UCP321 105 140 490 380 120 36 50 50 280 112 44 M30 36.60
UCP322 110 150 520 400 140 40 55 55 300 117 46 M33 42.50
UCP324 120 160 570 450 140 40 55 65 320 126 51 M33 53.50
UCP326 130 180 600 480 140 40 55 75 355 135 54 M33 72.10
UCP328 140 200 620 500 140 40 55 75 390 145 59 M33 89.10

→ Scroll table horizontally to view all columns. Catalogue dimensions for reference only — engineering drawings required before order.

Metric bore only — no inch bore variants in this series. Solid base option: suffix SB. Engineering drawings required before order confirmation.

heavy duty pillow block bearing units mining conveyor cement bulk material application

Applications

⛏

Overland Belt Conveyor Drives

Head pulley and drive pulley shafts on overland and underground mining conveyors where shaft diameters from 80–140 mm are standard. Two-bolt format allows shaft-side replacement without dismantling the conveyor structure.

🏛

Cement Plant & Clinker Handling

Bucket elevator drive shafts, clinker conveyor drive pulleys, and raw mill feed screw shafts in cement plants where abrasive dust, high ambient temperature, and heavy cyclic loads combine.

🌿

Combine Harvester Main Frame Drives

Primary threshing cylinder and straw walker drive shafts on large combine harvesters where heavy crop loads demand the UCP300 load capacity.

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Industrial Fan & Blower Shafts

Large centrifugal fan shafts in power station forced-draft systems where shaft diameters of 80–120 mm and continuous full-load operation for weeks are standard.

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Aggregate Processing Equipment

Vibrating feeder drive shafts, screen decks, and crusher auxiliary drives where impact loads combined with high belt tensions create peak bearing loads requiring UCP300 capacity.

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Bulk Handling Terminal Equipment

Ship unloader boom conveyor drives and stacker-reclaimer drives where shaft sizes reach UCP320–UCP328 territory.

📦 MOQ & Order Information

  • Standard parts: quantity-based MOQ applies per model number.
  • High-value / large items: minimum order by USD order value.
  • New-client samples: 1–5 pcs available at sample price for first-time buyers.
  • Multi-model combines: aggregate orders of USD 1,500 or more across models accepted.
  • Special materials / processes: subject to process MOQ — confirm at inquiry stage.
  • Retail (1–2 pcs): not accepted. Minimum sample order is 1–5 pcs at sample pricing.

Detailed engineering drawings must be submitted and approved before order confirmation. Catalogue dimensions are for reference only.

GBC heavy duty mounted bearing units pillow block industrial large bore

When to Choose UCP300 Over UCPX00

Select UCP300 when bearing life calculations indicate that UCPX00 at the required shaft size produces an L10 life below 20,000 hours, or when the shaft diameter exceeds 100 mm where UCPX20 is the maximum standard UCPX00 size. For loads that exceed even the UCP320–UCP328 capacity, a split-housing plummer block is required. Where precise shaft positioning without shaft machining is the primary constraint, the UKP200+H adapter sleeve series offers an alternative at smaller bore sizes.

Frequently Asked Questions

Does UCP300 have inch bore variants?

No. Metric bore only. Bore size = model suffix: UCP305 = 25 mm, UCP328 = 140 mm.

What is the maximum shaft size?

UCP328 = 140 mm shaft, 89.1 kg, M33 mounting bolts. Largest bore in standard cast iron pillow block range.

Can it accept thrust loads?

Deep groove ball inserts accept limited axial load. For sustained heavy thrust a different bearing type is required.

What is the MOQ?

Standard parts: quantity-based MOQ. Samples 1–5 pcs. Multi-model from USD 1,500. Retail 1–2 pcs not accepted.

Request a Quote for UCP300 Series

Provide shaft diameter, radial and thrust load estimates, operating speed, and daily running hours. Contact us.

Heavy duty cast iron pillow block bearing units with setscrew locking, shaft bore 25–140 mm. Maximum radial load capacity in the standard cast iron pillow block range. New-client samples 1–5 pcs at sample price. Multi-model orders from USD 1,500. Retail 1–2 pcs not accepted. Engineering drawings required — catalogue for reference only.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

Contact Us

Email

sales@australia-drive.com

stuart_hamill@generalbearing.com.au

Tel: +61 3 9070 7991

SKU: GBC-UCP300 Categories: , Tags: , , ,

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