We provide full-process customization services from product design, material selection, sample making to mass production to meet customers' special specifications and functional requirements.
Comprehensive technical reference for precision spindle and instrument mounting applications.
Applications where flange mounting accuracy directly determines system performance.
CNC spindle nose bearings use precision flange units for direct, repeatable axial location without the stack-up error of a separate housing.
Precision optical instrument stages use flange bearings for accurate, repeatable rotational positioning in metrology and imaging equipment.
Precision robotic arm joints use integrated flange bearings for compact, accurate mounting where positional repeatability affects overall robot accuracy.
Wafer handling and inspection equipment uses precision flange bearings for the sub-micron positional accuracy required in semiconductor processing.
CMM rotational axes use precision ground flange bearings to maintain measurement accuracy across the machine's working envelope.
CT and imaging equipment rotating gantries use precision flange bearings for smooth, accurately located rotation critical to image quality.
Eliminated stack-up tolerance meets true positional repeatability.
Coordinated grinding of flange face and raceways in a single setup achieves tighter squareness than separately manufactured housing assemblies.
Integrated flange construction eliminates the accumulated tolerance of press-fitting a separate bearing into a housing, improving positional accuracy.
Full P4/P5 internal precision matches our high-speed bearing line, combining rotational accuracy with precise flange location in one component.
No separate housing machining required—the integrated flange mounts directly to a machined face, simplifying customer assembly and reducing part count.
Global logistics for precision Ground Flange Ball Bearings orders.
T/T (Wire Transfer): 30% deposit, 70% upon shipment.
L/C at Sight: Accepted for orders exceeding 5,000 pieces.
Open Account: Available for long-term OEM customers.
Sea Freight: FCL/LCL from Shanghai or Ningbo for bulk orders.
Air Express: DHL/FedEx for urgent samples and small batches.
Standard Flange Sizes: 20 – 30 days.
Custom Bolt Pattern: 30 – 40 days.
P4 Precision Grade Certification: 35 – 45 days.
Expert answers about precision Ground Flange Ball Bearings.
A: Standard flange units (like our two bolt or three bolt flange bearings) use a separate cast or stamped housing pressed onto an insert bearing, introducing stack-up tolerance. Precision ground flange bearings integrate the flange directly into the ground outer ring in a single machining setup, eliminating that stack-up error for applications requiring tighter positional accuracy.
A: Applications where mounting misalignment directly translates to system-level error—machine tool spindles, optical positioning equipment, semiconductor handling, and precision measurement instruments—benefit meaningfully from integrated flange precision. General-purpose shaft support does not require this level of accuracy.
A: Yes, the integrated flange mounts directly to a customer-machined mounting face using the flange's bolt pattern, eliminating the need for a separate housing component altogether.
A: Yes, due to the more complex coordinated grinding process required to achieve integrated flange squareness, these bearings typically cost 3-5x standard cast housing flange units, reflecting the precision manufacturing investment.
A: The flange face and bearing raceways are ground in the same fixture setup relative to a common datum, ensuring concentricity is controlled by a single precision grinding operation rather than the assembly tolerance of separate components.
A: Both counterbored (flush-mount) and through-hole bolt patterns are available, matched to common spindle and instrument mounting standards, with custom bolt circle diameter and hole count available for OEM-specific mounting requirements.
A: Phenolic cages offer excellent high-speed performance with low mass; brass cages offer superior strength and thermal stability for heavier preload applications; steel cages offer cost efficiency for moderate speed requirements. Selection depends on your specific speed and load profile.
A: Yes, matched bearing pairs with specified preload class are available for applications requiring zero axial and radial play, such as high-precision spindle configurations requiring maximum stiffness and positional accuracy.
A: Standard MOQ is 20 pieces for stocked flange sizes and bolt patterns. Custom flange dimensions or bolt patterns require a minimum order of 50 pieces due to dedicated grinding fixture setup.
A: Yes, full CMM dimensional inspection reports documenting flange squareness, raceway concentricity, and precision grade compliance are provided with every precision flange bearing shipment.
A: Yes, matched bearing pairs or sets ground to complementary preload specifications are available for spindle and instrument applications requiring controlled preload configuration.
A: Custom bolt pattern flange bearings typically require 30-40 days including fixture design, coordinated grinding setup, and first-article dimensional verification before production release.
Key specifications and ordering details.
| MOQ | 20 Pieces (Custom: 50) |
| Lead Time | 20 – 45 Days |
| Packaging | Individual Protective Case |
| Certifications | ISO 9001 / Full Dimensional Inspection Report |
| Materials | GCr15 Chrome Steel |
| Customization | Bolt Pattern, Cage Material, Preload Class |
10 YEARS INDUSTRY EXPERIENCE
8700m² advanced factory
15 high-tech professionals
Annual production: 2.4 million sets
Rigorous quality protocols ensure integrated flange squareness and rotational precision.
Flange face and raceways are ground in a single fixture setup to eliminate stack-up tolerance and achieve target squareness and concentricity.
CMM inspection confirms bore dimensions and bolt hole pattern location meet the specified precision grade before final assembly.
Finished bearings undergo runout and preload testing to confirm rotational accuracy meets P4/P5 precision grade specification.
Comprehensive testing protocols for precision flange bearing validation.
CMM inspection confirms flange face squareness to the bearing bore axis falls within the ±0.002-0.005mm specification for the ordered precision grade.
Precision measurement verifies the mounting flange is concentric with the bearing raceways to ensure accurate positional location upon installation.
Finished bearings are tested for radial and axial runout to confirm compliance with P4 or P5 precision grade rotational accuracy requirements.
Profilometer measurement confirms raceway surface finish meets the Ra 0.1µm specification essential for low-friction, low-vibration precision rotation.
CMM measurement confirms bolt circle diameter, hole count, and hole position match the specified mounting pattern within tolerance.
For matched bearing sets, preload force and resulting system stiffness are verified to confirm compliance with the specified preload class.
Understand when integrated flange precision is worth the investment.
| Feature | Standard Cast Housing Flange Unit | Precision Ground Flange (Our Grade) |
|---|---|---|
| Flange Squareness | Assembly-Tolerance Dependent | ±0.002-0.005mm Ground |
| Positional Stack-Up Error | Present (Housing + Bearing) | Eliminated (Integrated) |
| Precision Grade | P0 Typical | P4, P5 Available |
| Best Application | General Shaft Support | Spindle / Optical / Instrument |
| Installation | Housing + Insert Bearing | Direct Mount, No Housing |
| Cost Multiplier | 1.0x (baseline) | 3.0-5.0x |
We provide full-process customization services from product design, material selection, sample making to mass production to meet customers' special specifications and functional requirements.
With an advanced production base of 8,700 square meters and rich technical experience, we are able to respond quickly to customer needs, whether it is small batch customization or large-scale mass production.
We strictly follow the GB/T 19001-2016/ISO9001:2015 quality management system. Each customized product undergoes strict quality inspection to ensure that it meets the high standards of customers.
Our internal technical team consists of experienced engineers and designers who can provide professional technical support to help you optimize product design and improve production efficiency.
We have a stable supply chain and sales network around the world to ensure that your products can enter the market quickly and receive timely after-sales service.
Precision ground flange ball bearings can be engineered in bolt pattern, precision grade, cage material, and preload class to match your specific spindle or instrument mounting requirements. We provide full engineering collaboration from design review through delivery.