Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When shaft misalignment, binding, or inconsistent travel ruins a build, the root cause is almost always a low-tolerance bushing. Engineers, CNC builders, and robotics makers who demand repeatable, low-friction linear motion need a bearing that stays true across thousands of cycles. These SCS, SBR, TBR, and SC-VUU linear motion ball bearings are engineered for exactly that workload.
Each bearing features a chrome-steel ball complement housed in a hardened steel outer shell, with a self-aligning design that compensates for minor shaft deflection. Shaft diameter coverage spans 8 mm (0.31 in) to 60 mm (2.36 in), with standard UU (single-seal) and LUU (double-seal, extended) body lengths available across SCS and SBR series. SC-VUU units add an open-type V-groove profile suited to round-rail applications, while TBR units integrate a bolt-flange block for direct rail mounting.
Typical use cases include CNC router Z-axis carriages requiring tight positional accuracy, 3D printer X/Y gantry systems where smooth travel reduces layer artifacts, and industrial pick-and-place robotics arms where consistent stroke length is critical. Long-tail applications also include laser engraver bed assemblies, plasma cutting tables, and DIY linear actuator builds.
Available from 8 mm to 60 mm shaft diameter across SCS, SBR, TBR, and SC-VUU series — one source for your entire linear motion BOM.
UU (standard length) and LUU (extended length) variants in SCS and SBR series provide flexibility for load distribution and carriage design.
Double-lip rubber seals on UU/LUU units retain grease and block contamination, extending service life in dusty workshop and industrial environments.
Precision chrome-steel (GCr15) ball elements deliver smooth, consistent travel with minimal stick-slip — critical for CNC accuracy and 3D print quality.
SCS units use a pillow-block housing with bolt holes; SBR/TBR units bolt directly to matching rail blocks; SC-VUU units suit open round-rail track systems.
Dimensional footprints follow widely adopted SCS/SBR/TBR/SC standards, making these drop-in replacements for worn bearings on existing machines.
| Series | SCS, SBR, TBR, SC-VUU |
|---|---|
| Shaft Diameter Range | 8 mm – 60 mm (0.31 in – 2.36 in) |
| Body Length Types | UU (standard), LUU (extended) — SCS & SBR series |
| Ball Material | Chrome steel (GCr15) |
| Outer Shell Material | Hardened steel |
| Seal Type | Double-lip rubber seal (UU/LUU); Open (SC-VUU) |
| Lubrication | Factory-greased |
| Mounting Style | See variant options |
| Dynamic Load Rating | See variant options |
| Static Load Rating | See variant options |
| Operating Temperature | –10 °C to +80 °C (14 °F to 176 °F) |
| Finish | Bright / lightly oiled |
| Quantity per Order | 1 piece (select variant) |
SCS units are self-contained pillow-block bearings that clamp around a smooth round shaft — ideal for compact carriage designs. SBR units bolt onto a matching SBR rail block and are common in router and laser cutter builds. TBR units are similar to SBR but use a wider flange block suited to heavier loads. SC-VUU units are open-type bearings with a V-groove profile for round-rail track systems. Match the series to your rail or shaft system.
UU denotes a standard-length body, while LUU is an extended (long) body with more ball rows. The LUU variant distributes load over a greater contact length, which reduces bearing pressure and improves rigidity — useful for cantilevered carriages or heavier payloads. If your design has space, LUU is the more capable choice for demanding applications.
For smooth, low-play operation, use hardened linear shafts ground to h6 or f7 tolerance. Shafts with excessive surface roughness or out-of-round profiles will cause premature wear and increased noise. Induction-hardened, chrome-plated shafts (HRC 60+) are the standard pairing for this bearing family.
The standard chrome-steel construction offers moderate corrosion resistance when kept lubricated, but is not rated for continuous wet or salt-spray exposure. For humid workshops, apply a light machine oil periodically. For outdoor or washdown environments, consider stainless-steel shaft and bearing combinations instead.
Yes — SCS8UU and SCS10UU are among the most common bearings used in 3D printer X/Y/Z axes (e.g., Prusa, Anet, and similar designs). SBR and TBR series are widely used in CNC router gantry systems. Confirm the shaft diameter and series match your machine's specification before ordering.
Measure the outer diameter of your linear shaft with a caliper. The bearing model number encodes the shaft size: for example, SCS8UU fits an 8 mm shaft, SBR16UU fits a 16 mm shaft, and SC25VUU fits a 25 mm shaft. If you are replacing an existing bearing, the model number is usually stamped on the outer housing.
Yes, all units are factory-greased and ready to install. For extended service life — especially in high-cycle or high-speed applications — re-lubricate with a lithium-based grease every 3–6 months or after exposure to contaminants.
These bearings are rated for –10 °C to +80 °C (14 °F to 176 °F) continuous operation. Exceeding 80 °C will degrade the rubber seals and grease, leading to premature failure. For high-temperature environments, specify a bearing with high-temperature grease and heat-resistant seals.
