- 1-807-228-1532
- support@dnb3d.ca
Free shipping on orders over $175
New Products added Daily
Ready to Ship | Father’s Day Gifts | Custom Orders
Essential LM6LUU Linear Ball Bearing for smooth, stable linear motion on 6mm smooth rods in Prusa-style 3D printers, CNC projects, robotics, and compact mechanical slides.
$4.45
60 in stock
The LM6LUU Linear Ball Bearing is an extended-length linear motion bearing designed for smooth travel on compatible 6mm smooth rods. With a 6mm inner diameter, 12mm outer diameter, and 35mm overall length, this long-style bearing provides additional support compared with shorter LM6UU bearings. It is a practical choice for 3D printers, Prusa-style builds, compact CNC machines, robotics projects, linear tables, mechanical slides, and DIY motion systems.
This bearing is commonly used in applications where low-friction linear movement is required along a round shaft. The longer LM6LUU body helps provide more bearing surface contact, which can improve stability in compact motion assemblies when properly installed and aligned. For builders working on Prusa MK3-style machines, DIY 3D printers, or custom 6mm rod-based motion systems, the LM6LUU Linear Ball Bearing is a useful replacement, upgrade, or spare part.
The LM6LUU bearing is made for use with 6mm smooth rods or shafts. Proper shaft sizing and surface finish are important for smooth operation. A bent, scratched, dirty, or undersized rod can cause rough movement, excess noise, binding, or premature wear. For best performance, use clean, straight, hardened smooth rods designed for linear bearing applications.
The “LUU” style indicates a longer bearing body compared with the standard LM6UU format. This makes the LM6LUU useful where additional carriage support is preferred while still keeping the motion system compact. The longer body can be helpful for printer axes, small mechanical slides, compact gantries, measuring fixtures, and motion assemblies where stability matters.
The LM6LUU Linear Ball Bearing uses a double-sealed design to help reduce contamination from dust, debris, filament particles, and shop residue. The seals help protect the internal recirculating ball path and reduce the amount of frequent cleaning required. For the best service life, the bearing should still be kept clean, lightly lubricated when needed, and protected from abrasive particles.
This bearing is suitable for 3D printer motion systems, Prusa-style builds, light-duty CNC projects, camera sliders, robotics mechanisms, linear tables, 2-axis tables, 3-axis tables, and custom mechanical slides. It is especially useful in builds where 6mm smooth rod motion is already part of the design and a longer linear bearing is required.
For other motion components, browse the Linear Guide Rail and Blocks category. You may also want to compare this bearing with related products such as LM6UU Linear Ball Bearing, LM8UU Linear Ball Bearing, and LM8LUU Linear Ball Bearing.
LM-style linear ball bushings are commonly used with cylindrical shafts to create low-friction linear motion systems. For technical comparison, THK lists the LM6LUU format as a long-type linear bushing with a 6mm shaft size, 12mm outer diameter, and 35mm overall length. See this LM6LUU technical reference for additional dimensional context.
Every order is hand-inspected and precision-shipped from dnb3D in Marathon, Ontario. Whether you are repairing a Prusa-style printer, building a compact linear slide, or stocking spare motion components, this LM6LUU Linear Ball Bearing provides a simple and reliable option for 6mm smooth rod motion systems.
The LM6LUU Linear Ball Bearing is an extended-length linear motion bearing designed for use with compatible 6mm smooth rods and precision shafting.
| Product Type | Linear ball bearing / linear motion bushing |
|---|---|
| Bearing Series | LM6LUU |
| Shaft Compatibility | 6mm smooth rod / 6mm linear shaft |
| Inner Diameter | 6mm |
| Outer Diameter | 12mm |
| Overall Length | 35mm |
| Body Style | Long / extended-length linear bearing |
| Material | Hardened chrome steel |
| Finish | Chrome / polished steel appearance |
| Seal Style | Double sealed |
| Static Load Capacity | 265 N |
| Dynamic Load Capacity | 402 N |
| Recommended Working Load | Up to 80% of rated load; do not exceed rated load |
| Common Applications | Prusa-style 3D printers, DIY 3D printer builds, compact CNC, robotics, mechanical slides, 2-axis tables, 3-axis tables, and linear tables |
| Related Short Bearing | LM6UU Linear Ball Bearing |
| SKU | DB-0710-7594-3 |
| Fulfillment | Hand-inspected and precision-shipped from dnb3D in Marathon, Ontario, Canada |
The LM6LUU Linear Ball Bearing is designed for compatible 6mm smooth rods or linear shafts. Before installation, inspect the rod for scratches, dents, bends, rust, or debris. Damaged or dirty rods can create rough motion, noise, binding, or premature bearing wear.
Do not hammer, cl, crush, or force the bearing into place. Linear ball bearings contain recirculating steel balls and internal raceways that can be damaged by impact or uneven pressure. If the bearing is being installed into a printed part, bearing holder, or housing, make sure the bore is properly sized and aligned.
The double-sealed design helps protect the internal bearing path, but the bearing should still be kept clean. Wipe the smooth rod with a clean lint-free cloth before installation and during regular maintenance. Avoid allowing filament dust, shop debris, CNC chips, sawdust, or abrasive particles to collect on the shaft.
Use a light machine oil or suitable linear bearing lubricant when required. Avoid excessive lubricant, especially in dusty environments, because heavy buildup can attract debris. After lubrication, move the carriage through the full travel length to distribute lubricant evenly.
Linear ball bearings require good shaft alignment. Misaligned rods, twisted frames, uneven bearing holders, or over-constrained assemblies can create binding and rough travel. If using multiple bearings on one axis, confirm that both rods are parallel and that the carriage moves freely before final tightening.
Use the LM6LUU bearing only with compatible 6mm smooth rods. Do not use it on 8mm rods or mismatched shafts. If your build uses 8mm smooth rods, use an LM8UU or LM8LUU bearing instead.
Every order is hand-inspected before shipping. dnb3D precision-ships motion components across Canada from our Ontario facility, helping 3D printer builders, makers, and machine owners receive clean, usable parts ready for careful installation.
At dnb3D, we don’t just ship boxes—we manufacture solutions. Operating our Industry 4.0 micro-factory in Marathon, Ontario, means your order is handled by the same people who design and test these components.
Ready to Ship (3D Printer Parts & Hardware): Finished, inspected, and on the shelf. Dispatched within 1 to 2 business days.
In-House Manufacturing (Laser, Plasma, 3D Prints): These items are manufactured “fresh” to order. Please allow 3 to 5 business days for precision cutting and finishing.
Custom Projects: Bespoke designs require a consultation and a locked-in timeline before production begins.
We ship nationwide across Canada and the USA. Centrally located on the North Shore of Lake Superior, we are uniquely positioned to get your products moving quickly to either coast.
We stand behind every weld, cut, and print. If a product doesn’t meet your expectations, contact the Hub within 30 days. If we wouldn’t put it in our own shop, we won’t let it sit in yours.
Standard Items: Contact us within 30 days for return authorization. Items must be in original, unused condition.
Custom/Personalized Orders: Digitally fabricated to your exact specs (names, custom dimensions, or unique finishes) are final sale once production begins.
Shipping Costs: Return shipping is the responsibility of the customer unless the item arrived damaged or defective.
Have questions about a specific build? Click here to contact the shop.
