Linear Guide Rails
Profile rail guides carry heavy, offset loads with high rigidity — the standard motion element of machine tools and automation axes.
What are linear guide rails?
A linear guide (profile rail) system pairs a precision-ground rail with one or more recirculating-ball carriages (blocks). The gothic-arch raceways take load in all four directions, giving far higher moment rigidity than round-shaft systems — which is why machine axes, gantries and precision stages are built on them.
Types of linear guide rails
Standard profile rail + block
The general automation workhorse in multiple width series.
Miniature guides
Compact rails for small stages and instruments.
Preloaded / high-rigidity classes
Interference-set balls remove play for cutting and precision axes.
High-accuracy classes
Tighter running parallelism grades for measurement and machining.
How to select linear guide rails
- Load, moment and life calculation to size the rail series.
- Accuracy class and preload for the application.
- Number of blocks per rail and rail length (butted rails for long axes).
- Lubrication and sealing options.
Not sure? Send what you have — a part number, drawing or photo — and our engineering team will confirm the selection.
Frequently asked questions
- Profile rail or round shaft — which linear guide should I use?
- Profile rails give higher rigidity and moment capacity and mount on a machined surface; round-shaft systems tolerate less-precise mounting and cost less. For loaded, accurate axes profile rail is standard; for simple guided motion round shaft is often enough.
- What does preload mean on a linear guide?
- A slight interference between balls and raceways that removes internal clearance. Preload increases rigidity and repeatability at the cost of slightly higher friction — chosen by class to match the duty.
Related components
Linear Bearings
Linear bearings put recirculating balls between shaft and carriage, turning sliding friction into smooth rolling motion.
Linear Shafts
The shaft is half of every linear bushing system — its hardness, roundness and surface finish set the accuracy and life of the motion.
Aluminium Profile
T-slot aluminium profile turns frame building into assembly — cut, bolt, reconfigure — no welding, no painting.
Need linear guide rails?
Tell us the specification, quantity and application — or just send the drawing.