Custom Hydraulic Pump Housing & Bellhousings Manufacturing
We engineer and manufacture custom hydraulic pump housings and motor mounts to your exact CAD specifications. Kurt Foundry delivers fully machined, ready-to-assemble bellhousings designed to eliminate vibration and ensure perfect concentricity between C-Face electric motors and hydraulic pumps.
What is a Custom Hydraulic Pump Housing (Bellhousing)?
A hydraulic pump housing, commonly known as a bellhousing or motor mount, serves as the critical structural link between an electric motor and a hydraulic pump. These heavy-duty components enclose the flexible shaft coupling, protect the internal mechanisms from industrial debris, and eliminate the need for complex shim alignments.
We custom-engineer every pump housing to match your specific power unit design. Whether your application requires standard NEMA C-Face motor mounts or specialized SAE pump flanges, our foundry pours and machines the exact geometry you need. Our integrated manufacturing approach guarantees strict dimensional control, ensuring accurate shaft alignment that significantly prolongs bearing and seal life.
Supply chain managers and lead engineers rely on our direct-factory model to reduce costs without sacrificing quality. By combining heavy-duty sand casting methods with in-house 5-axis CNC machining, we deliver finished pump and motor adaptors that bolt directly onto your assembly line.
Material Options for Pump Housings
Selecting the correct alloy is vital for managing vibration, system pressure, and overall equipment weight. We cast custom bellhousings in multiple grades to suit your specific fluid power application.
| Material Grade | Tensile Strength (MPa) | Key Properties | Ideal Pump Housing Applications |
|---|---|---|---|
| ASTM A48 Class 30 (Gray Iron) | ≥ 207 | Exceptional vibration damping, excellent machinability, highly cost-effective. | Standard industrial motor mounts, stationary hydraulic power units, gear pumps. |
| ASTM A536 65-45-12 (Ductile Iron) | ≥ 448 | High impact resistance, superior tensile strength, good ductility. | Heavy-duty construction equipment, mobile hydraulics, high-shock environments. |
| ASTM A216 WCB (Carbon Steel) | 485 – 655 | Extreme toughness, excellent weldability, high pressure rating. | Severe service environments, mining machinery, ultra-high-pressure systems. |
| ASTM A351 CF8M (Stainless Steel) | ≥ 485 | Maximum corrosion resistance, chemical durability. | Marine environments, offshore drilling, corrosive chemical processing pumps. |
Engineered for High-Performance Fluid Power Systems
Precision CNC Machining & Perfect Concentricity
Misalignment destroys hydraulic pumps. We utilize advanced 5-axis CNC machining centers to finish every custom hydraulic pump housing. Our machinists routinely hold concentricity tolerances within 0.003 inches from the motor pilot to the pump pilot. Strict tolerance control guarantees smooth power transmission and prevents premature coupling failure.
Superior Vibration Damping & Sound Reduction
Hydraulic systems generate intense operational noise and physical vibration. By pouring bellhousings using custom Gray Iron Castings, we leverage the natural flake graphite microstructure to absorb mechanical resonance. These heavy-duty iron mounts reliably lower system noise levels and protect sensitive downstream damping elements.
Our Custom Engineering & Manufacturing Process
1. DFM Review & 3D Simulation
Our foundry engineers review your CAD files and simulate the molten metal flow using Magmasoft. We optimize gating designs to prevent shrinkage porosity inside the thick mounting flanges.
2. Resin Sand Molding
We utilize furan resin-bonded sand to create highly rigid molds. The specific types of sand used in sand casting dictate the surface finish, and our automated furan system ensures exceptionally smooth internal bores.
3. Precision Metal Pouring
We melt the selected iron or steel alloy in medium-frequency induction furnaces. Our metallurgists verify the exact chemical composition using spectrometry before pouring the molten metal into the sand mold.
4. Heat Treatment & Stress Relieving
Heavy castings undergo controlled heat treatment. Normalizing and tempering the bellhousings relieves internal casting stresses and maximizes the machinability of the metal.
5. CNC Machining & Final Inspection
We machine all critical mounting faces, pilot holes, and bolt circles. The finished pump adaptors undergo strict Coordinate Measuring Machine (CMM) inspection to verify perpendicularity and concentricity.
Uncompromising Quality Control for Motor Mounts
A flawless hydraulic pump housing requires rigorous verification at every manufacturing stage. We do not guess about material strength or dimensional accuracy. Our in-house testing laboratory provides fully traceable Material Test Reports (MTRs) for every batch of bellhousings we export to North America.
Spectrometric Analysis
Pre-pour chemical verification ensures exact ASTM alloy compositions.
CMM Inspection
Automated probing verifies critical NEMA, IEC, and SAE flange dimensions.
Mechanical Testing
In-house tensile, yield, and hardness testing guarantees structural integrity.
NDT Testing
Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) detect hidden surface and internal defects.
Frequently Asked Questions (FAQs)
Please provide 3D CAD models (STEP or IGES format) and 2D engineering drawings. Specify the required material grade, the motor frame size (such as NEMA or IEC), the pump flange standard (such as SAE A, B, or C), and your estimated annual production volume.
While aluminum offers weight savings, custom Ductile Iron Castings and gray iron provide superior vibration damping and higher structural rigidity. Iron is the preferred choice for heavy-duty industrial power units, construction equipment, and high-pressure hydraulic systems where noise reduction and durability are critical.
Yes. Because we custom-engineer every component, we can CNC machine any specific bolt pattern, breather hole, or inspection port your design requires. We regularly machine custom access points for flexible shaft couplings and integrated oil coolers.
Initial tooling production and first-article sampling typically require 3 to 4 weeks. Once you approve the physical prototype, standard production runs require 4 to 6 weeks, depending on the order volume and CNC machining complexity.
Absolutely. We specialize in exporting heavy industrial castings to the USA and Canada. We offer Delivered Duty Paid (DDP) shipping, meaning our logistics team manages the ocean freight, import tariffs, and final truck delivery directly to your facility’s loading dock.
Ready to Manufacture Your Custom Pump Housings?
Stop dealing with middleman markups and unreliable machining tolerances. Partner directly with the heavy industry foundry that melts the metal and machines the final part. Send us your bellhousing drawings today, and our engineering team will provide a highly competitive direct-factory quote within 48 hours.
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