Engineered small.
Spec'd serious.
Mini-Rail packs full recirculating-ball precision into rail widths down to [VERIFY] mm — purpose-built for medical, semiconductor, and lab automation where every millimeter of envelope matters and the accuracy still has to be there. Request a sample sized to your axis.
Request your sample
Tell us your envelope and load — we'll match a Mini-Rail sample to your axis.
Why engineers spec Mini-Rail
Same recirculating-ball precision as full-size profile rails, packed into the smallest profile in the catalog. Engineered for envelopes where ball bushings can't reach the accuracy.
Compact envelope
Rail widths from [VERIFY] mm fit inside instrument-scale assemblies where standard profile rail won't.
Full preload range
Light to heavy preload classes — match the carriage to your moment loads without sacrificing smoothness.
Precision accuracy
Top P3 accuracy class for repeatable positioning and tight running parallelism over the carriage's life.
Stocked + supported
Common sizes ship from Roscoe; application engineers help you size the rest. No long lead times.
Engineered specifications
Verified performance across load, accuracy, and life.
| Rail material | Hardened bearing steel |
| Rail widths | [VERIFY] mm |
| Dynamic load capacity (C) | Up to [VERIFY] kN per carriage |
| Static load capacity (C₀) | Up to [VERIFY] kN per carriage |
| Accuracy classes | Normal / High / Precision (P3) |
| Preload classes | Light / Medium / Heavy |
| Max linear speed | [VERIFY] m/s |
| Lead time | Stocked sizes ship same day |
Common applications
- Medical instrument positioning
- Semiconductor handlers
- Lab-automation gantries
- Optical and laser stages
- Compact pick-and-place
- Robotic end-effector slides
We needed full P3 accuracy in an instrument envelope where standard profile rail wouldn't fit. Mini-Rail dropped straight in — and the carriage runs quieter than the system it replaced.
Same precision.
Less envelope.
Request a free Mini-Rail sample sized to your axis — or download the engineering catalog.
Request my sample