Features of Bearing Housing Machining Center
- All TSINFA bearing housing machining centers must pass multiple strict tests during the production process to deliver you stable and reliable geometric accuracy, repeatability accuracy and dynamic performance of the machine tools.
- We strictly adhere to the ISO9001:2015 quality management system, with written process records for every step from component procurement to final assembly.
- Our bearing housing machining centers support common bearing housing materials such as cast iron, aluminum, structural steel and alloy steel, helping you maintain stable processing performance under different batch sizes and working conditions.
- Our bearing housing machining center integrates multiple processes such as milling, drilling, boring, tapping, and chamfering. It can reduce errors caused by clamping errors and enhance the consistency and dimensional stability of your parts.
- We offer round-the-clock technical support, covering remote diagnosis, program guidance, spare parts consultation and on-site services, to help you resume processing progress in the first place and reduce the risk of production downtime.
Advantage of Bearing Housing Machining Center
This machining center integrates milling, drilling, boring, tapping, and chamfering, completing all key surfaces and hole positions in a single clamping. This eliminates alignment errors from multi‑machine transfers and significantly improves production efficiency while ensuring consistent batch quality.
The bearing housing machining center is paired with a quick‑change mold system, completing mold swaps within 30 minutes. By switching parametric program libraries, it quickly adapts to bearing housings of various specifications without complex debugging. This flexibility enables efficient production switching on the same line, making it ideal for medium‑ to small‑batch, multi‑specification orders.
Compared to standard machining centers, bearing housing machining centers excel in overall rigidity. When processing thick‑walled or large bearing housings, they can achieve cutting depths of 3–5 mm without noticeable vibration or deformation, producing smooth bore walls free of tool marks. This structural stability extends tool life and effectively prevents micro‑cracks or vibration‑induced fatigue in the housing.
The bearing housing requires extremely high accuracy and flatness in its bore system. Even minor deviations can lead to unstable operation or premature wear. The CNC machining center meets these precision demands, ensuring a perfect fit between the bearing and the shaft after assembly. This effectively prevents shaft movement, vibration, or early failure caused by excessive clearance.
Through intelligent path optimization and a fast tool‑change system, the equipment minimizes non‑cutting time, ensuring continuous, stable production. It maintains consistent precision even across multiple shifts, allowing for higher output per unit and lower manufacturing costs.
High Batch Consistency
The machine center is equipped with an online measurement and error compensation system, which can monitor key dimensions in real time and automatically correct tool compensation, ensuring your consistent quality from the first piece to the last.
Types of Bearing Housings
The bearing housing machining center can be adapted to various structural types of bearing housings, meeting the processing requirements from medium and small-sized equipment support parts to heavy-duty working condition components.
Pillow Block Housing
The pillow bearing housing is a flat bottom and a shape similar to a “pillow”, suitable for installation on a horizontal support surface. It can maintain stable operation in harsh environments such as dust, vibration or moderate shock and is most widely used in motors, conveying systems, fans and pump equipment, with hole diameters typically ranging from 12mm to 100mm.
The bearing housing machining center can complete the overall processing of the base plane, bearing holes, installation screw holes and chamfers in one clamping. It can make the coaxiality of the bore system controlled within ±0.005mm and ensure your maximum height difference within the 100mm flatness tolerance range of the base surface shall be controlled within ±0.008mm.
Flanged Bearing Housing
Flanged bearing housings are widely used in small motors, gearboxes and automated equipment, and usually adopt two-hole or four-hole flange structures.
The machining center can achieve multi-angle processing of vertical and inclined surfaces through five-axis linkage, and simultaneously complete flange planes, threaded holes and bearing holes in one clamping. And for workpieces with shaft diameters ranging from 20mm to 400mm, the center can automatically perform angle compensation and coordinate rotation to ensure consistent distribution accuracy of each screw hole and avoid assembly deviations.
Take-Up Bearing Housing
The take-up bearing housing is mainly used in application scenarios that require axial tension adjustment or automatic centering, such as conveyor belt systems, linear drive devices and tensioning systems. It is usually an integral and inseparable structure.
The machining center can complete the compound processing of dovetail grooves, pull rod eyes and sliding planes in a single station, and monitor the key dimensions in real time through the online measurement system. And the machine can handle structural misalignment up to 5°, while allowing the shaft to move linearly during assembly.
According to different load requirements, you can choose the cast iron version (for standard industrial use) or the pressed steel version (for light load conditions), and the machining center can stably achieve the matching structural accuracy in both cases.
Flange block bearing housing
Flange blocks are mainly applied in heavy-duty mechanical equipment, such as mining machinery, compressors, large conveying systems and metallurgical equipment. Its shell is generally made of high-strength cast iron or ductile iron, because it needs to have excellent load-bearing capacity and fatigue resistance.
The machining center has a high-torque spindle and heavy-duty cutting capability, enabling rough machining with a cutting depth of 3 to 5mm while maintaining a smooth hole wall free of vibration marks. It can automatically switch between rough machining and finish machining by combining a high-precision CNC rotary table with a dual-spindle structure.
In your production, whether it is a standard model or a special custom structure, the center can be quickly adapted through parametric programming, shortening your production cycle.
Materials That The Bearing Housing Machining Center Handle
- Cast iron: Cast iron is the most common manufacturing material for bearing housings due to its high strength, excellent shock absorption performance and stable dimensional retention. Its tensile strength range is usually between 200 and 450 N/mm² and is able to withstand heavy-load impacts while maintaining precise fits. Gray cast iron and ductile iron are particularly suitable for working conditions in mining machinery, compressors, heavy conveying equipment, and so on.
- Aluminum alloys: Aluminum alloys are commonly used in marine, aerospace and lightweight machinery due to their light weight, good corrosion resistance and strong thermal conductivity. The tensile strength of some high-strength aluminum alloys can even reach 48,000 psi.
- Steel: Steel bearing housings show extremely high mechanical strength and impact resistance and are an ideal choice for you to apply in high-load and high-speed scenarios such as automotive manufacturing, construction machinery, and mining equipment. Its tensile strength usually exceeds 400 N/mm².
- Plastic composite materials: For equipment with high requirements for lightweight or corrosion resistance, it is recommended to use composite materials such as glass fiber reinforced polyamide (PA6-GF). This material features excellent impact resistance and chemical stability, particularly suitable for food processing, medical machinery, and Marine environments.
Process Flow of The Bearing Housing Machining Center
Blank Preparation
The initial shape of the bearing housing blank comes from casting or forging.
- Casting is the process of pouring molten metal, such as steel or cast iron, into molds to form rough blanks with complex shapes. And it is suitable for batch production.
- Forging achieves a dense structure through high-temperature and high-pressure plastic deformation. This way can enhance your material’s fatigue and impact resistance, and is suitable for high-intensity working conditions.
Boring
Boring is used to expand and precisely correct the pre-drilled hole size.
During this process, the center adopts the single-point cutting tool to remove material along the inner wall, achieving precise control of roundness, straightness and coaxiality.
This can ensure the high bearing mating holes accuracy and a stable assembly clearance.
Milling
The center utilizes multi-edge rotary tools to machine flat surfaces, slots, and complex features. Milling enables you to simultaneously finish mounting surfaces, threaded holes, keyways, and mating planes.
The machining center maintains tolerances of ± 0.01mm, particularly suitable for multi-angle, multi-surface simultaneous machining.
Drilling
Drilling holes are used to create functional structures such as lubricating oil channels, installation holes, and positioning holes in the shell. The machining center ensures smooth hole walls and straight deep holes through high-precision drill bits and cooling systems, and can stably form even in hard steel parts.
Grinding
Grinding involves using a grinding wheel to finely finish the mounting surface or bearing hole to remove trace materials and improve surface quality. The surface roughness after processing can reach Ra 0.2-0.4 µm, meeting your high-precision assembly requirements. It is often used for the mating surfaces of high-speed or low-noise operating equipment.
Honing
The machining center improves roundness, straightness and surface finish by performing micro-removal of the inner hole. The cross textures produced by honing help retain the lubricating oil film, reduce friction and wear and are widely used in high-precision bearing housings and hydraulic housing.
Finishing
The surface roughness is further decreased down to Ra 0.004 µm through ultrafine abrasives and the bearing area is increased up to 80-95%. This can improve the wear resistance and service life of the bearings, ensuring the long-term stable operation of the equipment.
Surface treatment
It is optional for you to take surface treatment of the processed bearing housing, such as deburring, cleaning and oiling to improve its surface quality and service life.
Depending on the application scenario, you can also choose special protective treatments such as anodizing, electrophoresis or nickel plating to further enhance the corrosion resistance.
Specification of the Bearing Housing Machining Center
Material Capacity
You need to select the appropriate machining center based on its material capacity.
For example, if your main processing material is aluminum alloy, it is recommended to choose a machining center with a high-speed spindle to achieve a higher cutting speed and surface finish. If the main processing object is cast iron or cast steel bearing housing, a machine center with high torque and high rigidity structure should be selected to ensure your stable processing accuracy even under large cutting volume conditions.
Machining Accuracy
Precision is the core control point in the processing of bearing housings, directly affecting the bearing fit clearance, transmission stability and the overall service life of the machine. Special attention should be paid to positioning accuracy, repeat positioning accuracy and hole system processing accuracy.
These parameters can ensure your bearing and the bearing housing achieve an ideal interference or clearance fit after assembly with maintaining smooth running.
Working Dimensions
The travel range of the machining center determines the maximum characteristic dimensions of the machining bearing housing. When you are choosing, the maximum external dimensions of the parts and the space of the fixture should be taken into account. It is important to ensure the entire processing area can be completed in one clamping to reduce the error of repeated positioning.
Cutting Tool
Tool configuration directly affects your processing efficiency and surface quality. It is advisable to choose high-strength cemented carbide tools for steel and cast iron processing. And it is best to select a machining center that is equipped with an automatic tool changing system and covers all process requirements such as turning, boring, drilling, milling, tapping, and chamfering.
Motor power
The power of the main motor reflects the continuous load-bearing capacity of the machine tool during cutting.
For heavy cutting conditions (such as cast steel or thick-walled shells), it is recommended to choose models with a spindle power of 15-25 kW and a spindle torque of 120-250 Nm.
It is recommended for you to adopt high-precision CNC machining centers and stable fixture systems, and use certified high-quality raw materials.
At the same time, online dimensional inspection and compensation should be carried out in key processes, and ISO standards should be strictly followed.
The globally recognized tolerance and fit standards are formulated by ISO 286-1/286-2. Common fit grades are: hole H7, shaft M6 or J6.
These codes define the allowable range of dimensional deviations to ensure the interchangeability of components among countries.
To achieve precise and reliable dimensions, it is necessary to take comprehensive quality control and inspection.
You can use a micrometer and a coordinate measuring machine (CMM) to check all key measurements (such as hole width, diameter and mounting surface) to ensure they meet the design tolerances.
And the surface roughness tester will also be used to check the surface finish.
