Thin Section Four-Point Contact Ball Bearing Manufacturer
Compact Type X thin section bearings for moment load, reversing axial load and space-limited precision assemblies.
Haron Bearing manufactures thin section four-point contact ball bearings for robot joints, gimbals, rotary tables, medical equipment, optical systems and automation machinery. With a thin and constant cross-section design, one bearing can support radial load, axial load in both directions and moment load in a compact envelope.
Quick Engineering Overview
Understand the structure before choosing the model.
Thin & Constant Cross-Section
The cross-section remains slim while the bore diameter can be enlarged, helping designers save radial space and reduce weight in compact cabinet drawings.
Four-Point Contact Geometry
The gothic arch raceway creates four contact points between balls and raceways, allowing the bearing to handle multiple load directions in one compact unit.
For Moment & Reversing Axial Loads
This Type X bearing is suitable for moment loading and axial loading in both directions, especially where two angular contact bearings would take too much space.
One Bearing, Simpler Assembly
In many compact mechanisms, a single four-point contact thin section bearing can simplify the open-frame structure and reduce assembly width compared with paired bearings.
Thin Section Four-Point Contact Ball Bearing Parameters
Standard and custom options for precision motion systems.
| Bearing Type | Type X / Four-Point Contact / Thin Section |
|---|---|
| Raceway Design | Gothic arch raceway |
| Load Direction | Radial load, axial load in both directions, moment load |
| Precision Grade | P5 / P4 / P2 available upon request |
| Material Options | GCr15 / 52100 chrome steel, 440C, 304/316 SS, hybrid ceramic |
| Ball Options | Chrome steel balls, stainless steel balls, Si3N4 ceramic balls |
| Cage Options | Brass cage, steel cage, nylon cage, phenolic cage |
| Closure Options | Open, ZZ shielded, 2RS sealed, low-friction seals |
| Bore Size | Standard inch / metric sizes and custom drawing sizes |
| OEM Service | Custom dimension, material, precision, packaging, private label |
What Is a Thin Section Four-Point Contact Ball Bearing?
A thin section four-point contact ball bearing is a compact Type X bearing with a slim cross-section and gothic arch raceways. Unlike standard radial ball bearings, it is designed to support radial load, axial load in both directions and moment load in one bearing. This makes it useful when the machine design requires a large bore, low weight, compact installation width and controlled rotational accuracy.
- Thin cross-section saves radial space in tight mounting holes.
- Large bore allows cables, shafts or optical paths to pass through.
- Four-point contact supports combined load efficiently.
- Can reduce the need for two separate angular contact bearings.
Engineering Pain Points This Bearing Solves
Designed for compact mechanisms where space, weight and load direction are all critical constraints in your cabinet drawing.
Limited radial space
Your equipment needs a large bore and compact outer envelope, but standard bearings occupy too much radial space. Type X solves this with a constant slim profile.
Moment load in a narrow assembly
A single radial bearing cannot control tilting moment well, while a duplex pair may be too wide. Four-point contact handles moments in one thin unit.
Reversing axial load
The shaft or rotating structure experiences axial force from both directions during operation, requiring a gothic arch raceway to prevent shifting.
Assembly weight reduction
Lightweight equipment such as robots, optical systems and aerospace mechanisms requires lower rotating mass to maintain touch accuracy and speed.
Model selection uncertainty
Unsure whether to choose Type C, Type A, Type X, or a cross roller bearing? Our engineers analyze your interface compatibility to recommend the exact fit.
Low torque & high accuracy
Precision equipment needs smooth rotation, controlled runout and stable preload without over-designing the assembly. P5/P4 grades ensure stability.
Not sure which bearing type to choose for your specific constraints?
Why Choose a Type X Four-Point Contact Thin Section Bearing?
Handles Multiple Load Directions
Supports radial load, axial load in both directions and moment load within one compact bearing.
Saves Space and Weight
The thin section profile helps reduce assembly size while keeping a large central bore for shafts or cables.
Alternative to Two Bearings
In space-limited mechanisms, one Type X bearing simplifies the design compared to a paired arrangement.
Better for Moment-Dominant Apps
Suitable for gimbals, rotary tables, and robot joints where moment load is a major concern.
Custom Preload Available
Haron supports low clearance, radial preload and application-specific stiffness requirements.
OEM Material & Seal Options
Choose chrome steel, stainless steel, hybrid ceramic, open, shielded or sealed versions.
Thin Section Four-Point Contact Ball Bearing Types
Choose the right Type X bearing according to sealing, material, precision and application environment.
Open Type X Thin Section Four-Point Contact Bearing
Designed for clean environments where low friction, flexible lubrication and easy inspection are required. Suitable for precision rotary tables, optical instruments and automation assemblies with external protection.
Sealed Type X Thin Section Four-Point Contact Bearing
Equipped with contact seals to help protect against dust, moisture and lubricant leakage. Suitable for robot joints, packaging machinery and equipment where contamination protection is important.
Shielded Type X Thin Section Four-Point Contact Bearing
Metal shields provide basic protection while keeping rotational resistance lower than contact seals. Suitable for applications requiring moderate contamination protection and smoother running.
Stainless Steel Thin Section Four-Point Contact Bearing
Made for wet, corrosive or washdown environments. 440C stainless steel can be used for corrosion resistance while maintaining good hardness for precision bearing applications.
Hybrid Ceramic Thin Section Four-Point Contact Bearing
Uses steel rings with Si3N4 ceramic balls to reduce rotating mass, friction and heat generation in demanding precision applications requiring mass production stability.
Type X vs Type A vs Type C Thin Section Bearings
Choose by load direction, speed, stiffness and available assembly space.
Type C — Radial Contact
Best For: Primarily radial load.
Features: Deep groove design, good radial load capacity, suitable for general rotation.
Not Ideal For: High moment load or heavy reversing axial load.
Type A — Angular Contact
Best For: Axial load in one direction and high-speed precision assemblies.
Features: Often used in DB / DF / DT pairs for stiffness and axial load control.
Not Ideal For: Used alone under reversing axial or moment load.
Type X — Four-Point Contact
Best For: Moment load, reversing axial load and compact multi-load assemblies.
Features: Gothic arch raceway, four contact points, one bearing supports multiple loads.
Not Ideal For: Pure radial load or extreme high-speed applications.
| Load / Requirement | Recommended Type |
|---|---|
| Primarily radial load | Type C |
| High axial load in one direction | Type A |
| Reversing axial load | Type X or paired Type A |
| Moment load in limited space | Type X |
| High-speed precision | Type A or Type C depending on load |
| Need compact design replacing two bearings | Type X |
| Need stiffness from paired arrangement | DB / DF angular contact pair |
If you are not sure which type is suitable, send Haron Bearing your drawing, load direction, speed, precision grade and working environment.
Applications of Thin Section Four-Point Contact Ball Bearings
Robot Joints
Large bore for cable routing, compact cross-section and combined load capacity for lightweight joint design.
Gimbal Systems
Supports smooth rotation and moment load in compact optical or camera stabilization assemblies.
Precision Rotary Tables
Useful for compact indexing systems and slow-to-medium speed positioning platforms.
Medical Imaging Equipment
Large bore and thin profile support compact rotation in imaging and diagnostic systems.
Optical Instruments
Helps maintain alignment where lightweight and smooth motion are required.
Semiconductor Equipment
Suitable for clean, compact and precise rotating mechanisms in wafer handling and test equipment.
Radar and Antenna Systems
Large-diameter thin section design helps reduce weight while supporting moment and axial loads.
Packaging Machinery
Works in compact rotating stations, inspection wheels and indexing devices.
How to Choose a Thin Section Four-Point Contact Ball Bearing
Confirm load direction
Identify radial load, axial load from both directions, moment load and combined load conditions.
Check if Type X is suitable
Use Type X when moment load or reversing axial load is important. If pure radial, Type C is better.
Define dimensions
Confirm d, D, B and available mounting space. Send a drawing for custom OEM sizes.
Choose material
GCr15 for standard precision, 440C stainless for corrosion resistance, hybrid ceramic for low friction.
Decide sealing & lube
Choose open, ZZ or 2RS according to speed, contamination, torque and maintenance requirements.
Confirm precision & preload
Choose P5/P4/P2, and define clearance/preload according to stiffness and runout requirements.
Before requesting a quote, please prepare:
- Bearing model or drawing
- Bore / OD / width
- Load direction & load
- Speed or oscillation angle
- Precision grade
- Working temperature
- Material and sealing
- Target application
Manufactured by Haron Bearing Since 2000
A precision bearing factory for OEM customers and engineering projects.
100 Production Lines
Stable production capacity for standard and custom bearing projects, ensuring mass production stability.
P5 / P4 / P2 Precision Capability
Support for precision applications requiring controlled runout, torque and dimensional accuracy verified by CMM.
OEM / ODM Customization
Custom size, material, cage, seal, lubrication, preload, packaging and private label support based on sample approval.
Export-Oriented B2B Service
Support global buyers with sample confirmation, technical communication, MOQ flexibility, and shipping coordination.
Factory Production Process
1. Raw Material
2. Ring Turning
3. Heat Treatment
4. Precision Grinding
5. Superfinishing
6. Assembly
7. Cleaning
8. Inspection
9. Anti-Rust
10. Packaging
Quality Control for Precision Thin Section Bearings
For robot joints, gimbals and precision rotary systems, Haron Bearing focuses on runout, torque consistency, preload stability and surface finish.
Material, Cage, Seal and Lubrication Options
Ring & Ball Materials
GCr15 / 52100, 440C stainless, 304/316 SS, hybrid ceramic and full ceramic options for different precision needs.
Cage Options
Brass, steel, nylon, phenolic and custom separator options for different speed, torque and load requirements.
Open, ZZ and 2RS
Open for low friction, ZZ for moderate protection, 2RS for dust and moisture protection.
Specific Lubrication
Low-torque grease, high-temp grease, cleanroom grease, food-grade grease and oil options.
OEM Packaging and Private Label Support
Haron Bearing supports neutral packaging, Haron branded packaging, customer logo packaging, barcode labels, model labels, anti-rust bags, carton boxes and export pallets.
- Neutral Box
- Haron Brand Box
- Customer Logo Box
- Anti-Rust Protection
- Barcode Label
- Export Carton & Pallet
FAQ About Thin Section Four-Point Contact Ball Bearings
Common questions regarding Type X bearing selection, capabilities, and OEM customization.
What is a thin section four-point contact ball bearing?
When should I choose Type X instead of Type C?
Can one four-point contact thin section bearing replace two angular contact bearings?
Is a four-point contact thin section bearing suitable for robot joints?
What materials are available?
Can Haron Bearing make custom thin section bearings?
What information should I provide for a quote?
Is Type X suitable for high-speed applications?
Key Takeaways
- Thin section four-point contact ball bearings are also known as Type X thin section bearings.
- The gothic arch raceway creates four contact points between balls and raceways.
- One bearing can support radial load, axial load in both directions and moment load.
- Type X is best for compact, moment-dominant and reversing axial load applications.
- For pure radial load, Type C may be more suitable; for high-speed axial load, Type A or duplex angular contact bearings may be considered.
