The LM30UU 30 MM Linear Motion Bearing is a precision-engineered linear ball bearing designed for smooth, low-friction motion along a single axis in medium to heavy-duty applications. Manufactured with a high-carbon chromium steel outer casing, synthetic resin retainer plate, and hardened end rings, it delivers reliable performance, high load capacity, and extended service life. Ideal for 3D printers, CNC machines, robotics, industrial automation, and heavy-duty linear guidance systems.
| ✓ Premium Quality Bearings | ✓ Technical Assistance |
| ✓ Nationwide Delivery | ✓ Industrial & Heavy-Duty Support |
Product Identification
| Field | Value |
|---|---|
| Product Type | Linear Motion Bearing |
| Model | LM30UU |
| Type | Closed Type |
| Bore Diameter | 30 mm |
| Outer Diameter | 45 mm |
| Outer Casing Material | High-Carbon Chromium Steel |
| Retainer Material | Synthetic Resin |
| End Rings | Hardened Coat |
| Design | Ball Cage Loop |
| Interchangeable | Yes (Standardized Parts) |
| Lubrication | Required (Shaft) |
| Shaft Requirement | Chrome Plated, G6 Tolerance, Hardened |
Contact our technical sales team with your application requirements, shaft diameter, or load specifications for expert assistance.
Technical Specifications
- • Model: LM30UU
- • Type: Closed Type
- • Bore Diameter: 30 mm
- • Outer Diameter: 45 mm
- • Outer Casing: High-Carbon Chromium Steel
- • Retainer Material: Synthetic Resin
- • End Rings: Hardened Coat
- • Design: Ball Cage Loop
- • Operation: Low Noise, High Speed
- • Interchangeable: Yes
- • Lubrication: Required (Shaft)
- • Shaft Requirement: Chrome Plated, G6 Tolerance, Hardened
LM Bearing Dimension Charts
Refer to the dimension charts below for complete LM bearing size specifications, including length, weight, and mounting dimensions:
LM30UU 30 MM Linear Motion Bearing – Product Overview
The LM30UU 30 MM Linear Motion Bearing is a precision ball bushing designed for smooth, low-friction linear motion along a single axis in medium to heavy-duty applications. With a 30 mm bore and 45 mm outer diameter, it offers excellent load capacity for a wide range of industrial equipment.
The bearing features a high-carbon chromium steel outer casing that provides exceptional strength and rigidity for medium to heavy-load applications. The synthetic resin retainer plate ensures accurate ball guidance while minimizing noise, even during high-speed operation. Hardened end rings with a protective coat extend the bearing’s service life and protect against wear.
All components are standardized and interchangeable, so replacing worn parts is simple and cost-effective — no need to replace the entire assembly. For optimal performance and smooth motion, the shaft should be lubricated and should meet G6 tolerance with a chrome-plated, hardened surface.
Compatibility & Interchangeability
The LM30UU 30 MM Linear Motion Bearing offers broad compatibility and is designed for seamless integration into existing systems:
- • Compatible with 30 mm diameter round shafts
- • Closed type design for unsupported shaft applications
- • Standardized dimensions for easy replacement
- • Interchangeable with industry-standard LM30UU bearings
- • Suitable for use in mounted slide units
- • Works with chrome-plated G6 tolerance shafts
For optimal performance, ensure your shaft meets G6 tolerance and is properly lubricated. Contact our technical team for installation guidance.
Key Features & Benefits
- • High-Carbon Chromium Steel Casing: Exceptional strength, rigidity, and durability
- • Synthetic Resin Retainer: Precise ball guidance with low noise operation
- • Hardened End Rings: Enhanced wear resistance and extended service life
- • Versatile 30 mm Bore: Excellent load capacity for medium to heavy-duty applications
- • Low Friction Motion: Smooth, precise movement along a single axis
- • Interchangeable Parts: Easy replacement of worn components
- • Low Noise Operation: Suitable for high-speed applications
- • Popular Size: Widely used in 3D printers, CNC, and industrial automation
LM30UU Linear Motion Bearing – Industrial Applications
The LM30UU is a versatile linear bearing suited for a wide range of medium to heavy-duty applications:
- • 3D Printers: Precision axis motion for medium to large-format printers
- • CNC Machines: Reliable linear motion for cutting and milling
- • Robotics: Smooth, accurate joint and axis movement
- • Industrial Automation: Medium to heavy-duty linear guidance systems
- • Mounted Slide Units: Component carriage and positioning
- • Packaging Machinery: Smooth, reliable linear motion
Application suitability depends on load requirements, shaft quality, lubrication, and operating conditions. Contact our team for selection assistance.
Frequently Asked Questions
What is an LM30UU linear motion bearing?
The LM30UU is a closed-type linear ball bearing with a 30 mm bore diameter and 45 mm outer diameter. It provides smooth, low-friction linear motion along a round shaft and is commonly used in 3D printers, CNC machines, and industrial automation.
What is the difference between LM30UU and LM30UU OP?
LM30UU is the closed type bearing used on unsupported shafts. LM30UU OP is the open type bearing with a cutout that allows it to be used on supported shafts. The closed type (LM30UU) is preferred when the shaft does not require support along its length.
What shaft specifications are required for the LM30UU?
The LM30UU is designed for use with 30 mm diameter round shafts. For optimal performance, the shaft should be chrome-plated, hardened, and meet G6 tolerance specifications. Proper lubrication is also essential for smooth motion.
Is the LM30UU suitable for 3D printers?
Yes. The LM30UU is widely used in medium to large-format 3D printers that use 30 mm shafts. Its low friction, low noise, and smooth motion make it ideal for precision printing applications.
How do I maintain the LM30UU linear bearing?
Regular maintenance includes keeping the shaft clean and properly lubricated. Inspect the bearing for signs of wear such as increased noise, rough motion, or visible damage. Replace worn components promptly to prevent system failure.
Is the LM30UU suitable for high-speed applications?
Yes. The synthetic resin retainer and precision ball guidance system ensure low noise and smooth operation even at high speeds, making it suitable for demanding motion control applications.
About Linear Motion Bearings
Linear motion bearings, also known as linear ball bearings or ball bushings, are precision components designed to provide smooth, low-friction motion along a single axis. They are essential in applications requiring precise linear guidance, including 3D printers, CNC machines, robotics, and industrial automation. Explore our complete linear motion bearing range →
Why Choose Golden Bearing Company
- ✓ Premium Quality Bearings
- ✓ Wide Product Range
- ✓ Technical Selection Assistance
- ✓ OEM & MRO Support
- ✓ Bulk Order Capabilities
- ✓ Industrial Quotations
- ✓ GST Tax Invoice
- ✓ Nationwide Delivery
- ✓ Technical Support Available
Complete linear motion bearing support is available, including LM, LME, LMF, LKM, and SC series bearings, as well as supported shafts and mounting accessories. Contact us for current availability and technical assistance.
Available LM Bearing Sizes
Not sure whether the LM30UU is the correct size? Compare all linear motion bearing sizes →
LM series linear motion bearings are available in a wide range of standard sizes to suit various shaft diameters and load requirements.
LM8UU
LM10UU
LM12UU
LM13UU
LM16UU
LM20UU
LM25UU
LM30UU
LM35UU
LM40UU
LM50UU
LM60UU
LM80UU
LM100UU
Open type (OP) and closed type variants available for most sizes. Contact our team for availability.
Request a Quote
Contact our technical sales team for current availability, pricing, lead time, product selection assistance, or bulk industrial quotations. Click here to contact us →
