Custom Bearing Housing Castings
Engineered for heavy industrial machinery, our custom bearing housings deliver unmatched structural rigidity, precise alignment, and excellent vibration damping. We cast and CNC machine made-to-order bearing blocks, plummer blocks, and flanged housings to your exact CAD specifications.
Custom Pillow Block Housing
Flanged Bearing Housing
What We Customize for You
When standard pillow blocks fall short of your load ratings or dimensional constraints, Kurt Foundry manufactures custom bearing housings to your exact specifications. We cast these critical components using furan resin sand casting, from 50 lbs to over 5,000 lbs per piece.
1. Material: Choosing the Right Grade for Your Custom Bearing Housing
Material grade is selected to match your load, temperature, and corrosion environment — not pulled from a generic catalog. Each grade below links to the full casting process behind it.
Gray Iron
ASTM A48 Class 30/40. The industry standard for general-duty bearing housings — graphite flakes give excellent vibration damping and machinability at the lowest cost per pound.
View Grey Iron Casting Process
Ductile Iron
ASTM A536 65-45-12. Upgraded tensile and yield strength for shock-resistant plummer blocks and heavy conveyor bearings that gray iron can’t reliably handle.
View Ductile Iron Casting Process
Carbon Steel
ASTM A27 Grade 70-36. Our highest-strength option for extreme-stress applications like mining and crushing equipment where impact loads exceed what iron can absorb.
View Carbon Steel Casting Process
Stainless Steel
ASTM A351 CF8M. For marine and chemical processing housings that need long-term corrosion resistance without a protective coating that can wear off.
View Stainless Steel Casting ProcessFull mechanical property specifications for all five grades:
| Standard / Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Common Applications |
|---|---|---|---|---|
| ASTM A48 Class 30 (Gray Iron) | ≥ 207 | – | – | Standard industrial bearing housings, excellent vibration damping. |
| ASTM A48 Class 40 (Gray Iron) | ≥ 276 | – | – | High-load machine bases, heavy-duty pillow blocks. |
| ASTM A536 65-45-12 (Ductile Iron) | ≥ 448 | ≥ 310 | ≥ 12 | Shock-resistant plummer blocks, heavy conveyor bearings. |
| ASTM A27 Grade 70-36 (Carbon Steel) | ≥ 485 | ≥ 250 | ≥ 22 | Extreme stress applications, custom carbon steel castings for mining equipment. |
| ASTM A351 CF8M (Stainless Steel) | ≥ 485 | ≥ 205 | ≥ 30 | Corrosive environments, marine and chemical processing housings. |
2. Type: Pillow Block or Flanged Custom Bearing Housing
Two base configurations cover most industrial mounting requirements — we adapt the bolt pattern, footprint, and bore to your equipment either way.
Custom Pillow Block Housing
Two-bolt (or four-bolt) base-mounted housings for surface or pedestal installation. We size the footprint, bolt spacing, and bore diameter to your shaft and frame layout, and offer split-cap or solid-cap designs depending on your maintenance access.
Flanged Bearing Housing
Face-mounted housings for through-wall or end-plate installations, cast with the bolt circle and pilot diameter matched to your mating flange — the right choice when radial space is limited and mounting has to be face-to-face rather than base-to-base.
3. Dimensions: Sizing Your Custom Bearing Housing to Your Equipment
Every dimension is sized to your equipment, not the other way around.
Weight Range
We pour custom bearing housings from 50 lbs up to 5,000+ lbs as a single casting, sized to your exact shaft diameter, bore, and mounting geometry. Nothing is pulled from a standard catalog.
For housings above 500 lbs, we switch to floor molding with custom-fabricated patterns to handle the dimensional scale.
Bore, Envelope & Mounting
Bore diameter, housing OD, bolt spacing, and base footprint are machined to match your existing equipment envelope exactly, so the new housing drops into your current frame without modification.
Send us your 2D drawing or 3D CAD file and we will confirm feasibility and quote directly against your geometry.
Why Choose Custom Bearing Housings from Kurt Foundry
Every custom bearing housing we produce is cast, heat-treated, and CNC machined under one roof — engineered to outperform off-the-shelf alternatives in your specific application.
Precision CNC Machining
A cast bearing housing is only as good as its internal bore tolerance. We utilize in-house 5-axis CNC machining centers to achieve exact concentricity and tight dimensional tolerances. Proper machining prevents premature bearing failure and ensures perfect shaft alignment.
Custom Geometries and Split Designs
Heavy industrial applications often require complex split housings or solid flanged designs that standard catalogs do not offer. Our engineers review your CAD files to optimize the gating and risering systems, ensuring solid, defect-free metal throughout the thickest cross-sections.
Direct-Factory Supply Chain
Stop paying middleman markups for critical machinery components. By partnering directly with Kurt Foundry, supply chain managers gain total transparency, direct communication with our metallurgical team, and seamless DDP shipping straight to your facility.
Our Manufacturing Process
DFM and Solidification Simulation
Our engineering team imports your bearing housing CAD model into Magmasoft simulation software. We predict metal flow and shrinkage behavior to design a gating system that eliminates internal porosity before cutting any tooling.
CNC Pattern Making & Core Design
We machine the casting patterns and core boxes in-house using precision CNC routers. For custom housings requiring complex internal oil galleries or water-cooling jackets, we engineer precise resin sand cores to form those internal cavities.
Resin Sand Molding & Pouring
We utilize a furan resin sand molding process to create exceptionally rigid molds. The rigid mold walls prevent dimensional swelling during the pour, ensuring the heavy iron or steel casting matches your exact geometric requirements.
Heat Treatment & Stress Relieving
Heavy bearing housings often develop internal residual stresses during solidification. We subject the castings to a controlled thermal stress relief cycle, ensuring the part remains dimensionally stable during aggressive CNC machining.
Final Machining & Inspection
We mill the mounting faces, bore the bearing seats, and drill the tapping holes. Every finished housing undergoes Coordinate Measuring Machine (CMM) inspection to verify the critical bore tolerances match your engineering print.
Quality & CNC Verification
We verify every dimension and material property in-house. When you order custom bearing housings, you need absolute certainty that the metal chemistry and machined tolerances meet your specifications. Read more about us and our zero-defect policy. Kurt Foundry provides fully traceable Material Test Reports (MTRs) with every single shipment.
- Spectrometric Analysis: Pre-pour chemical testing verifies the exact ASTM alloy chemistry.
- CMM Verification: Coordinate Measuring Machines confirm precise bore concentricity and mounting hole locations.
- Mechanical Testing: In-house testing verifies tensile strength, yield strength, and Brinell hardness.
- NDT Capabilities: Ultrasonic Testing (UT) confirms internal structural soundness in thick-walled sections.
- Ready-to-Assemble Delivery: Fully integrated 5-axis CNC milling and turning eliminates the need for secondary machine shops.
Where Our Custom Bearing Housings Are Put to Work
Custom bearing housings from Kurt Foundry are built into specific pieces of rotating equipment, not generic “industries.” Here is the equipment our customers install them on most.
Jaw & Cone Crushers
Crusher bearing housings endure constant impact loading and abrasive particulate contamination. We cast oversized split housings in ductile iron with heavy-duty sealing grooves to keep contaminants out.
Rolling Mill Chocks
Rolling mill bearing housings, also known as chocks, must hold precise alignment under extreme radial force and elevated temperature. We cast these in high-strength carbon steel for continuous hot-rolling duty.
Marine Winches & Propeller Shaft Housings
Winch and propeller shaft housings face persistent saltwater exposure. Our custom CF8M stainless steel bearing housings hold up long-term without a protective coating that can wear off.
Overland Conveyor Pulleys
Conveyor pulley bearing housings carry massive belt tensions across long spans. We size custom plummer blocks specifically to your pulley shaft diameter and calculated bearing load rating.
Rotary Kiln Support Rollers
Kiln support roller housings operate under sustained radial load at high ambient temperature. Our gray iron housings provide the vibration damping needed to protect expensive spherical roller bearings.
Generator Pedestals & Turbine Housings
Generator pedestal housings require absolute concentricity and thermal stability. We machine these to tight tolerances and stress-relieve every casting to guarantee dimensional stability during operation.
Custom Bearing Housing vs. Standard Catalog Bearing Blocks
Standard pillow blocks and plummer blocks are designed for general-purpose applications. When your machinery demands more, custom bearing housing castings close the engineering gap.
Custom Bearing Housing Castings
- Bore diameter, housing OD, and mounting geometry match your exact shaft and frame layout
- Material grade selected to match your specific load, temperature, and corrosion environment
- Wall thickness and rib placement engineered through FEA and casting simulation
- Integrated sealing grooves, oil passages, and cooling channels cast directly into the housing
- Split-line orientation and cap bolt pattern designed around your maintenance access requirements
- Single-source supply from casting through final CNC machining
Standard Catalog Bearing Blocks
- Fixed dimensional increments force your design to accommodate the housing rather than the reverse
- Generic gray iron material may underperform in high-impact or corrosive service conditions
- Uniform wall thickness lacks optimized reinforcement for your actual load paths
- External seals and lubrication fittings require additional assembly and potential leak points
- Standard split orientations may conflict with your equipment frame or service clearance
- Multiple vendors required for raw housing, machining, and surface treatment
Frequently Asked Questions
The optimal material depends entirely on your load requirements. Gray iron (ASTM A48) is the industry standard because the graphite flakes provide excellent vibration damping and machineability. For high-impact or heavy shock-load applications, we recommend upgrading the material to ductile iron (ASTM A536) or cast carbon steel for superior tensile strength.
Our furan resin sand molding lines are built for heavy industrial components. We can cast and machine custom bearing housings ranging from 50 lbs up to 5,000 lbs per single piece. This massive weight capacity makes our process ideal for large mining crushers, marine winches, and heavy conveyor systems.
Yes. We operate a fully integrated manufacturing facility. We cast the raw metal and perform all final CNC machining operations in-house. We bore the bearing seats, face the mounting flanges, and drill all bolt holes so the custom housing is ready to install immediately upon delivery.
Thick cross-sections are highly prone to shrinkage cavities during the cooling phase. We prevent these shrinkage defects by running 3D casting simulations before production begins. Our foundry metallurgists design optimized risers to feed molten metal into the thickest sections as the casting solidifies, ensuring a dense, sound internal structure.
Absolutely. For food processing equipment, wastewater treatment facilities, or marine applications, we pour custom stainless steel castings. We frequently cast stainless grades like 304 (CF8) and 316 (CF8M) to provide maximum corrosion resistance against harsh chemicals and saltwater.
Lead times depend on pattern complexity and order quantity. For new custom bearing housing projects requiring new pattern tooling, expect 4 to 6 weeks from design approval to first article delivery. Repeat orders using existing patterns ship within 3 to 4 weeks. We maintain your pattern tooling at our facility at no additional storage cost, ensuring fast turnaround on reorders of your custom bearing housings.
Ready to Quote Your Custom Bearing Housing Castings?
Stop compromising your machinery design with standard catalog bearing blocks. Partner with Kurt Foundry to manufacture custom bearing housings engineered exactly to your load ratings, shaft dimensions, and mounting requirements. Whether you need a single prototype bearing housing or a production run of 500+ units, our foundry delivers. Send us your CAD files today, and our metallurgical team will provide a comprehensive DFM review and a direct-factory price for your custom bearing housing project.
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