The LM40UU 40 MM Linear Motion Bearing is a heavy-duty precision linear ball bearing designed for smooth, low-friction motion along a single axis in demanding industrial applications. Manufactured with a high-carbon chromium steel outer casing, synthetic resin retainer plate, and hardened end rings, it delivers exceptional load capacity, durability, and extended service life. Ideal for medium to large-format CNC machines, industrial automation systems, heavy-duty equipment, and high-load linear guidance applications.
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Product Identification
| Field | Value |
|---|---|
| Product Type | Linear Motion Bearing |
| Model | LM40UU |
| Type | Closed Type |
| Bore Diameter | 40 mm |
| Outer Diameter | 60 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: LM40UU
- • Type: Closed Type
- • Bore Diameter: 40 mm
- • Outer Diameter: 60 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:
LM40UU 40 MM Linear Motion Bearing – Product Overview
The LM40UU 40 MM Linear Motion Bearing is a heavy-duty precision ball bushing designed for smooth, low-friction linear motion along a single axis in demanding industrial applications. With a 40 mm bore and 60 mm outer diameter, it offers excellent load capacity for medium to large-format machinery and equipment.
The bearing features a high-carbon chromium steel outer casing that provides exceptional strength and rigidity for 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 in demanding environments.
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 LM40UU 40 MM Linear Motion Bearing offers broad compatibility and is designed for seamless integration into existing systems:
- • Compatible with 40 mm diameter round shafts
- • Closed type design for unsupported shaft applications
- • Standardized dimensions for easy replacement
- • Interchangeable with industry-standard LM40UU bearings
- • Suitable for use in heavy-duty 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 for heavy loads
- • Synthetic Resin Retainer: Precise ball guidance with low noise operation
- • Hardened End Rings: Enhanced wear resistance and extended service life
- • Versatile 40 mm Bore: Excellent load capacity for mid-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
- • Mid-Range Heavy-Duty Design: Ideal balance of capacity and footprint
LM40UU Linear Motion Bearing – Industrial Applications
The LM40UU is a versatile heavy-duty linear bearing suited for demanding industrial applications requiring excellent load capacity:
- • CNC Machines: Heavy-duty linear motion for industrial machining
- • Industrial Automation: High-load linear guidance systems
- • Heavy Equipment: Precision linear motion in large machinery
- • Manufacturing Systems: Automated production line guidance
- • Mounted Slide Units: Heavy component carriage and positioning
- • Packaging Machinery: Reliable linear motion for heavy-duty packaging
Application suitability depends on load requirements, shaft quality, lubrication, and operating conditions. Contact our team for selection assistance.
Frequently Asked Questions
What is an LM40UU linear motion bearing?
The LM40UU is a heavy-duty closed-type linear ball bearing with a 40 mm bore diameter and 60 mm outer diameter. It provides smooth, low-friction linear motion along a round shaft and is designed for demanding industrial applications requiring excellent load capacity.
What is the load capacity of the LM40UU?
The LM40UU offers high load capacity with its 40 mm bore and 60 mm outer diameter, making it suitable for mid-to-heavy duty industrial applications. For specific dynamic and static load ratings, please refer to the dimension charts or contact our technical team.
What shaft specifications are required for the LM40UU?
The LM40UU is designed for use with 40 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.
What is the difference between LM40UU and LM40UU OP?
LM40UU is the closed type bearing used on unsupported shafts. LM40UU OP would be the open type bearing with a cutout for supported shafts. The closed type (LM40UU) is preferred when the shaft does not require support along its length.
How do I maintain the LM40UU 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 in heavy-duty applications.
Is the LM40UU 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 high-speed industrial 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 LM40UU 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.
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Contact our technical sales team for current availability, pricing, lead time, product selection assistance, or bulk industrial quotations. Click here to contact us →
