0 ratings
Item #:
137846478
LM12UU Linear Ball Bearings 12mm Bore 21mm OD 30mm Long for CNC Machine 3D Printer 4pcs
Item #:
137846478
XAF 10387
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Wednesday, July 08
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
These ball bearing with two rubber dust sealed to prevent ingress of dirt, water and foreign matter.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Precision
Designed for smooth operation, these bearings ensure minimal friction for accurate motion control in CNC machines and 3D printers.
Versatile Compatibility
Perfectly suited for various applications, from DIY projects to industrial machines, enhancing performance in both 3D printing and CNC machining.
Durable Construction
Constructed with high-quality materials, these linear ball bearings offer excellent wear resistance and longevity, providing reliable performance over time.
Product Details
| Item Weight | 0.79 lbs (360 grams) |
Who Should Buy?
-
CNC Machinists
Ideal for CNC machinists needing reliable bearings for smooth movement and precision in machining operations.
-
3D Printing Enthusiasts
Perfect for 3D printer users seeking to enhance print quality with low-friction, durable bearings.
-
DIY Projects
Great for hobbyists undertaking DIY projects requiring affordable yet effective linear motion components.
-
Heavy Load Applications
Not suitable for applications involving heavy loads as these bearings may wear out quickly under stress.
-
High-Speed Machinery
Not ideal for high-speed machinery where advanced bearings are required to withstand rapid rotations.
-
Outdoor Use
Not recommended for outdoor applications as environmental exposure may lead to rust or degradation.
Product Description
LM12UU Linear Ball Bearings 12mm Bore 21mm OD 30mm Long for CNC Machine 3D Printer 4pcs
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the purpose of LM12UU linear ball bearings?
Answer: LM12UU linear ball bearings serve the primary function of providing smooth and low-friction motion in linear applications. They are designed to support linear shafts, allowing components to glide seamlessly along their path. This is crucial in CNC machines and 3D printers, where precision and accuracy are paramount. With their robust structure, these bearings minimize wear and enhance the longevity of the machinery by distributing load evenly. -
Question:
What are the dimensions of the LM12UU linear ball bearings?
Answer: The LM12UU linear ball bearings have a bore size of 12mm, an outer diameter of 21mm, and a length of 30mm. These specifications are standardized to fit various linear rails and ensure compatibility with multiple applications, particularly in hobbyist and professional-grade CNC machines and 3D printers. Knowing these dimensions helps users select the right bearings for their specific projects, ensuring optimal performance. -
Question:
Can I use LM12UU bearings in a 3D printer?
Answer: Yes, LM12UU bearings are commonly used in 3D printers to facilitate smooth movement of the print head and build platform. Their design allows for minimal axial and radial play, which is essential for maintaining print quality and precision. For instance, when configuring a Cartesian-style 3D printer, these bearings can significantly enhance the reliability of motion systems, allowing for consistent and high-quality prints. -
Question:
What materials are LM12UU bearings made of?
Answer: LM12UU linear ball bearings are typically constructed from high-quality steel and may feature a plastic or rubber seal. The steel components ensure durability and resistance to deformation, while the seals protect against dust and debris, which can impede operation. This construction makes them suitable for various environments, including workshops and home studios, ensuring reliable performance and longevity in machining applications. -
Question:
How do I install LM12UU bearings correctly?
Answer: Installing LM12UU linear ball bearings involves fitting them onto a compatible linear rail or shaft. Ensure that the shaft is clean and free of debris before sliding the bearings on. It's essential to check that the bearings align properly with the rail to avoid misalignment issues during operation. This installation technique is vital in applications like CNC machines, where precise movement is critical for achieving desired results. -
Question:
What is the load capacity of LM12UU linear ball bearings?
Answer: The load capacity of LM12UU linear ball bearings varies depending on their specific design and the conditions of use. Generally, they are capable of handling moderate loads effectively, which makes them suitable for 3D printers and CNC applications where the weights involved are within the bearings' limits. Understanding the load capacity helps users avoid overloading the bearings, thus ensuring smoother operation and a longer operational life. -
Question:
Are LM12UU bearings suitable for high-speed applications?
Answer: Yes, LM12UU linear ball bearings are designed to handle moderate speeds, making them appropriate for several high-speed applications, such as 3D printers. Their low-friction design minimizes heat build-up and wear, allowing them to perform efficiently during rapid motion. Users rely on these bearings for applications that require both speed and precision, ensuring that projects unfold seamlessly without compromising quality. -
Question:
Can I use LM12UU bearings in custom projects?
Answer: Absolutely, LM12UU linear ball bearings are versatile components that can be utilized in various custom projects, ranging from DIY CNC machines to unique robotic applications. Their standard dimensions and reliable performance make them a popular choice for engineers and hobbyists looking to innovate. When designing a custom build, it's crucial to consider compatibility with existing parts to ensure seamless integration and functionality. -
Question:
What is the difference between LM12UU and similar bearings?
Answer: LM12UU bearings differ from similar linear bearings primarily in terms of dimensions and design features. Unlike some other linear bearings, LM12UU bearings have a specific bore size of 12mm, designed for applications requiring precise fits with 12mm shafts. Additionally, the use of high-quality ball bearings within their housing helps reduce friction and increase smooth movement, making them more efficient for tasks that require high precision. -
Question:
Where can I buy LM12UU Linear Ball Bearings 12mm Bore 21mm OD 30mm Long for CNC Machine 3D Printer 4pcs?
Answer: You can buy LM12UU Linear Ball Bearings 12mm Bore 21mm OD 30mm Long for CNC Machine 3D Printer 4pcs on Ubuy. They offer a variety of components suitable for both CNC machines and 3D printers, ensuring you can find exactly what you need for your projects. Ubuy is a reliable platform that provides comprehensive details, helping you make informed purchasing decisions based on specifications and customer feedback.
FBT Linear Ball Bearings Editorial Review
No editorial reviews found
Customer Reviews & Ratings
1 customers ratings
-
5 Star
0%
-
4 Star
100%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
XAF 10387
Order now and get it around Wednesday, July 08
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Model: LM12UU, perfect for linear motion systems.
- Size: 12mm x 21mm x 30mm, ideal for various applications.
- Double seal design protects against dirt and moisture.
- Static Load Capacity: 412N, dynamic load capacity: 598N.
- Recommended load is 80% of rated load for optimal performance.
- Versatile applications: mechanical slides, linear tables, 3D printers, and more.