Support Housing: Bore Diameter 20-500 mm

Component Specifications

Definition

A support housing is a precision-engineered mechanical enclosure designed to house rolling-element or plain bearings in industrial equipment. It serves as the interface between rotating shafts and stationary machine frames, ensuring proper bearing alignment, distributing radial and axial loads to the machine structure, protecting bearings from contaminants, and often providing lubrication retention. These housings are critical for maintaining shaft positioning accuracy, reducing vibration, and extending bearing service life in demanding industrial applications.

Working Principle

The support housing operates by providing a rigid, precisely machined enclosure that positions bearings at optimal locations along a shaft. It transfers operational loads (radial, axial, and moment loads) from the rotating assembly to the machine frame through its mounting surfaces. By maintaining dimensional stability under load and temperature variations, it ensures bearing races remain properly aligned, preventing premature wear. Many designs incorporate sealing systems to exclude contaminants and retain lubricants, while some include cooling features or lubrication ports for enhanced performance.

Materials

Typically manufactured from cast iron (gray iron or ductile iron grades like ASTM A48 or GG25), cast steel (ASTM A27), or aluminum alloys (e.g., 356-T6). High-precision applications may use machined steel (AISI 1045/4140) or stainless steel (304/316) for corrosion resistance. Material selection depends on load capacity, thermal expansion compatibility with shafts, corrosion requirements, and weight considerations.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mounting	Bolt holes per ISO standards, machined base surfaces
Load Rating	Static: 10-500 kN, Dynamic: 5-300 kN
Housing Type	Pillow block, flange, take-up, cartridge
Sealing Type	Contact seals, labyrinth seals, V-ring seals
Bore Diameter	20-500 mm
Operating Temperature	-20°C to +150°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 113, ISO 3228, DIN 736, DIN 5417, ANSI/AFBMA 19

Parent Products

This component is used in the following industrial products

End Supports/Bearings

Structural components that provide mounting points and rotational support for ball screw ends within mechanical assemblies.

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Engineering Analysis

Risks & Mitigation

Misalignment causing premature bearing failure
Inadequate sealing leading to contamination
Thermal expansion mismatch with shaft
Improper mounting causing housing distortion
Corrosion in harsh environments

FMEA Triads

Trigger: Improper installation alignment
Failure: Bearing overheating and seizure
Mitigation: Use precision alignment tools during installation and verify with dial indicators

Trigger: Seal degradation or damage
Failure: Contaminant ingress leading to bearing wear
Mitigation: Implement regular seal inspection and replacement schedule; use appropriate seal type for environment

Trigger: Insufficient lubrication
Failure: Increased friction and temperature rise
Mitigation: Establish lubrication maintenance program; monitor temperature and vibration

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Housing bore: IT6-IT7 per ISO 286, mounting surfaces: flatness within 0.05 mm/m, perpendicularity within 0.1 mm

Test Method

Dimensional verification via CMM, load testing per ISO 76, seal effectiveness testing per ISO 6194, vibration analysis per ISO 10816

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Support Housing

Manufacturer profiles associated with Support Housing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a pillow block and flange housing?

Pillow block housings have a base for mounting on horizontal surfaces, while flange housings mount on vertical surfaces via bolt circles. Both serve the same function but differ in orientation and mounting configuration.

How often should support housings be inspected?

Visual inspections should occur monthly for signs of leakage or damage. Comprehensive inspections including alignment checks and internal examination should be performed annually or per manufacturer recommendations based on operating conditions.

Can support housings be used with different bearing types?

Yes, but they must be specifically designed for the bearing type (ball, roller, spherical) and size. Housing bore dimensions, tolerances, and internal geometry are matched to particular bearing series for proper function.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Support Housing