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.
What happens next
From form submit to sample on your bench — predictable, fast, and human.
You tell us about your axis
Load, travel, application. The form takes 30 seconds.
An engineer sizes the sample
We match a stocked size to your duty — or flag a custom before we ship, if your application calls for one.
It lands on your bench
Stocked sizes ship same business day. You test. We follow up only if you want us to.
Same precision.
Less envelope.
Request a free Mini-Rail sample sized to your axis — or download the engineering catalog.
Request my sample