説明
Precision Starts with the Part That Slides. A CNC router is only as accurate as the bearing that carries its axis, and a cheap block introduces play that no amount of software compensation removes. The Linear Standard is an SBR open linear motion bearing unit with an aluminium housing and a caged ball race, built for smooth travel, low friction and high rigidity.
Five bores cover the common range: 10mm, 12mm, 16mm, 20mm and 25mm, matched to the SBR guide rails of the same diameter. The open profile lets the block mount over a supported rail so the load path runs closer to the frame. Manufactured from aluminium with a hardened bearing surface, the blocks are economical to replace and simple to maintain, which is the reason the format is standard across hobby CNC and light industrial machinery alike.
Applications reach beyond the router table. Linear motion blocks show up in pumps, packaging equipment, automotive components, construction machinery and low-noise high-speed motor assemblies, anywhere a load has to travel in one direction and stay in line. Four blocks per set is the working quantity for one axis on a typical build.
A linear block performs to the standard of the rail it runs on. A worn or scored rail will transfer its imperfections straight into the cut, and a rail that is not parallel to its partner will bind the gantry no matter how good the bearing is. Before fitting, wipe the rail down with a lint-free cloth and a light oil, then slide the block along the full length by hand to feel for tight spots. Four blocks per set cover one axis on a typical router build, two per rail, with the load shared between them rather than carried by a single unit.
Accuracy is not a setting. It is a component.
Key Features
- ✦ SBR open linear motion bearing blocks, four per set
- ✦ Bores of 10, 12, 16, 20 and 25mm to match SBR rails
- ✦ Aluminium housing with a caged ball bearing race
- ✦ Smooth travel with low friction and high rigidity
- ✦ Open profile for mounting over supported rail
- ✦ Economical to replace and straightforward to maintain
- ✦ Suits CNC routers, automation, pumps and machinery
- ✦ Manufactured under the CNCCANEN brand
Technical Specifications
- Models: SBR10UU, SBR12UU, SBR16UU, SBR20UU, SBR25UU
- Inner Diameter: 10 mm, 12 mm, 16 mm, 20 mm, 25 mm
- Material: Aluminium housing with ball bearing slide
- Type: Open linear motion bearing slide unit
- Set Size: 4 blocks
- Motion: Smooth, low friction, high rigidity, long service life
- Maintenance: Economical and simple to replace
- Brand: CNCCANEN
- Typical Use: CNC routers, industrial machinery, pumps, automotive components
- Rail Compatibility: SBR guide rails of matching diameter
Where It Belongs
The primary use is the moving axis of a CNC router or a laser cutter, where the block carries the gantry and the accuracy of every cut depends on how little it shifts under load. Beyond that, the format is the default for automation work: linear actuators, sliding doors, packaging machines and test rigs. Maintenance teams use them as replacements in pumps and machinery where an existing rail is sound and only the block has worn. Anyone building a custom machine gets a standardised part with predictable dimensions rather than a proprietary carriage.
Setup and Maintenance
Keep the ball race lightly lubricated and the rail clean; grit is what shortens bearing life, not load. Re-check the mounting bolts after the first few hours of running, since a new machine settles as it cuts. Where a block is being replaced rather than installed new, measure the rail diameter before ordering instead of assuming it matches the block that came out. Blocks and rails are matched by bore, and a half-millimetre of mismatch will show as play at the tool.
Frequently Asked Questions
Q: How do I choose the right bore size?
Match the block to the diameter of your SBR guide rail. A 16mm rail takes an SBR16UU, a 20mm rail takes an SBR20UU, and so on.
Q: What material are the blocks made of?
An aluminium housing with a caged ball bearing race and a hardened bearing surface.
Q: How many blocks are in the set?
Four, which is the working quantity for one axis on a typical build.
Q: Can I mix bore sizes in one order?
Each listing option carries a single bore size. For a machine using different rail diameters on different axes, order the matching size for each.
Q: Do they need lubrication?
Yes. Keep the ball race lightly oiled or greased and wipe the rail before fitting. Clean rails are the main factor in bearing life.
Q: What are these used for?
CNC routers, automation equipment, packaging machinery, pumps, automotive components and other applications where a load has to travel in a straight line.
Q: How often should I lubricate the blocks?
Lightly oil or grease the race at each service interval, and wipe down the rail before every session. Cleanliness matters more than the choice of lubricant.
Q: Can I replace a worn block on an existing machine?
Yes, provided the rail is still sound. Measure the rail diameter to confirm the bore size, then fit the matching SBR block.





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