Description

Product Overview

This custom CNC machined bearing housing is specifically engineered to serve as a heavy-duty mounting base and ball screw support unit for industrial automation equipment. Featuring a robust flange mount design, an integrated side grease port, and internal screw holes for a bearing cover, this non-standard component is meticulously crafted to ensure precise alignment and reduced friction in linear motion systems. We provide tailor-made solutions based on your 2D/3D drawings, supporting both prototype and mass production runs.

1. CNC Machining Services & Technical Parameters

We utilize advanced 3-axis, 4-axis, and 5-axis CNC milling centers to achieve the complex geometries of this housing. Below are our standard manufacturing specifications:

2. Material Analysis (Steel vs. Aluminum)

Selecting the right material determines the lifespan and stability of your equipment.

• Structural Steel (45# / 4140 / 42CrMo): This is the preferred choice for the housing shown in the image. These materials offer high tensile strength and excellent wear resistance, ensuring the bearing seat does not deform under the high axial thrust loads generated by ball screws and servo motors. Steel is best for heavy-duty CNC machines and robust robot arms.

• Aluminum Alloy (6061/7075): While lighter and cheaper to machine, aluminum is softer. It is only recommended for low-load applications (e.g., light-duty 3D printers, small pick-and-place robots) to reduce the moving inertia. For the part shown, we strongly advise steel for durability.

3. Tolerance Capability & Quality Inspection

Achieving true performance in a housing like this relies entirely on precision tolerances. We guarantee the following Geometric Dimensioning and Tolerancing (GD&T) standards:

• Concentricity & True Position: The center main bore, the circular stop groove, and the bearing cover screw holes must be strictly concentric (usually within 0.02mm) to prevent bearing eccentricity and vibrations during high-speed rotation.

• Parallelism & Flatness: The back mounting face and the front flange face must be perfectly flat (within 0.02mm) to avoid stress distortion when bolted to the machine frame.

• Bore Tolerance: The inner diameter is generally finished to H7 (or custom), ensuring an exact press-fit for angular contact ball bearings.

• Inspection Method: We utilize CMM (3D Coordinate Measuring Machines) to verify hole positions and diameters, ensuring every thread and hole meets your critical blueprint requirements.

4. Application Scenarios

This custom mounting flange is widely used across various high-tech sectors:

• Industrial CNC Machine Tools: As a fixed-side support for ball screws in lathes, milling machines, and grinders, handling heavy cutting loads.

• Robotics & Automation Lines: As a motor mounting bracket for servo motors driving robotic joint arms and linear slide rails.

• Semiconductor & PCB Manufacturing: In devices requiring extreme precision (such as wafer handling robotics), where stability and vibration reduction are paramount.

• Aerospace & Medical Devices: As a precision transmission base in sensitive automation setups requiring non-standard dimensions.

5. Manufacturing Difficulties (How We Overcome Them)

Custom housing parts are notoriously complex to machine. Here is why our engineering team excels in making them:

1. High Rigidity Requirement: The thin-walled structure of the back pocket (the deep recess) is prone to deformation and “chatter” during milling. We use high-rigidity custom fixturing and optimized step-down milling strategies to maintain the pocket’s dimensional stability without causing resonant vibration.

2. Multi-Sided Setup: The part requires machining on the front (bearing seat and inner thread), back (deep pocket), and side (threaded port). This requires multiple precise setups or 5-axis machining. If using 3-axis, we employ high-precision dowel pins to ensure the work-piece realigns perfectly between the first and second operations.

3. Thread Integrity: The threads for the bearing cover (inside) and the grease port (side) must be perfectly perpendicular and clean. We use rigid tapping to ensure perfect alignment without breaking the tap.

6. Frequently Asked Questions (FAQ)

Q1: Is this a standard off-the-shelf product?
A: No, this is a non-standard, OEM custom part. We manufacture it strictly based on your provided 2D engineering drawings or 3D CAD models (STEP/IGES files).

Q2: I am confused. Is this a hydraulic O-ring flange or a mechanical bearing seat?
A: This is a mechanical bearing housing. The small internal holes are for mounting a cover plate to secure the bearing; they are not fluid ports, and the internal groove is not an O-ring seal. The side port is a grease/lubrication inlet, not a hydraulic pressure port.

Q3: What is your minimum order quantity (MOQ)?
A: We have zero MOQ requirements. We accept single-piece prototype orders for design validation, as well as high-volume production runs for mass manufacturing.

Q4: Can you provide surface treatment like black oxide or zinc plating?
A: Absolutely. For steel housings, we commonly offer Black Oxide (for corrosion resistance and aesthetics), Zinc plating, or Nickel plating. For aluminum versions, we provide hard anodizing.

Q5: How do you ensure the center hole and the four corner holes are perfectly aligned?
A: We machine the center bearing seat and the four mounting holes in the same setup on our CNC machine center. This eliminates any cumulative error from re-clamping. We then verify the exact hole position and concentricity using a 3D CMM and issue an inspection report with every shipment.