Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH is a miniature linear guide on a 12 mm stainless-steel rail with recirculating-ball carriages. It is the small end of the range, for light-duty precision positioning in a tight envelope — compact stages, small pick-and-place heads and inspection fixtures.
- SeriesLRM
- Supplied asComplete guide set
- SizeLRM12
- Rail width12 mm
- Carriage lengthStandard carriage
- Carriages2
- Rail length250 mm
- AccuracyH — high grade
- PreloadA — no preload
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH
This AirTAC LRM12N2X250S12.5AH is a complete miniature linear guide set: a 12 mm wide stainless-steel rail, 250 mm long, with two standard-length recirculating-ball carriages already fitted and end fixing holes 12.5 mm in from each rail end. It arrives ready to bolt down; nothing else needs buying.
What makes the two-carriage layout worth specifying is stiffness against tipping along the travel: with a carriage at each end of the moving load, a small head or bracket cannot nod forward and back the way it can on a single block. Ball retention holds the balls in place while you handle the carriage, though AirTAC still cautions against landing it on the rail at an angle or swapping it in a hurry. The recirculating balls themselves are Japanese-made to ISO 3290 grade G10 for roundness and wear, a double-lip seal scrapes oil and excludes dust, and an outer cover shields the seal strip. Ambient temperature must stay at or below 80 C, peaking no higher than 100 C. AirTAC publishes no load or moment rating for LRM, so we confirm the figures for this exact model before you commit - include it in your RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH |
|---|---|
| Series | LRM Series Miniature Linear Guide |
| Supplied as | Complete guide set |
| Construction | Recirculating ball, stainless-steel rail, common-rail design |
| Size code | LRM12 |
| Rail width | 12 mm |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 250 mm |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | H — high grade |
| Preload grade | A — no preload |
| Mounting screws | M2 or M3 rail screws depending on size |
| Lubrication | Pre-filled with Kyodo Yushi PS No. 2; top up through the rear lubrication hole |
| Ambient temperature | Up to 80 °C ambient, 100 °C transient peak |
| Interchangeability | LRM carriages fit LRM rails of the same model |
Specifications follow the official AirTAC LRM catalogue. The catalogue does not publish load or moment ratings, running parallelism, speed limits, or carriage base material for LRM. We will not quote a figure we cannot source — ask us and we will confirm it for your model.
Model Code: Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X250 | 2 carriages on a 250 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| A | A — no preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| H | H — high grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 250 mm |
| Carriage | Yes, 2 |
Rail and carriage(s) supplied together, matched as a set. If you are not sure which form you need, send us the machine or the original part number and we will confirm it before you order.
Where the Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH Is Used
Glue dispensing stage
A benchtop dispenser riding on two carriages over a 250 mm stroke keeps the nozzle plane flat, even with the dispense head hung out past the rail.
SMD pick-and-place head
Light placement heads for small components move smoothly on a 12 mm guide; the dual-carriage layout damps the pitch rock of a fast stop-and-go.
Microplate autosampler
Lab samplers shuttling plates between deck and reader need repeatable short travel at low load, exactly where a miniature ball guide is at home.
Is the Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH the Right Guide?
LRM carries no published dynamic, static or moment ratings, so treat load sizing as a conversation with us: we confirm the figures for this exact model at RFQ. When the load is substantial or cantilevered, step up to AirTAC LSH instead - that series publishes per-carriage dynamic, static and moment ratings you can plug straight into a calculation, which LRM does not offer. If the travel is short and the job demands crossed-roller rigidity, look across at LGC. Before ordering, tick off: complete set (rail plus two carriages), 12 mm rail width, standard carriage length, 250 mm rail length, preload A (none - the freest rolling and the least rigid), accuracy H (high), top-mount rail fixing, and a confirmed load rating from us.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Load and moment confirmed with us
- ✓ Travel length and mounting space
- ✓ Accuracy grade and preload
- ✓ Mounting surface ground or finish-milled
- ✓ Pairing code, if replacing a part
Installation & Maintenance Notes
- check Mounting surface must be ground or finish-milled.
- check Torque the rail screws per the recommended figures, in sequence.
- check Keep the mounting corner radius inside the stated R maximum.
- check Do not angle the carriage onto the rail; balls can drop out.
- check Drive the supplied bolt caps into the mounting holes.
- check Re-grease every 100 km of travel or every 3–6 months.
- check Installation by qualified personnel per AirTAC docs.
Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH FAQ
Rail width 12 mm; rail length 250 mm with end holes offset 12.5 mm; two standard-length carriages; preload grade A (none); accuracy H (high); top-mount rail. Fixing screws torque to 196 N.cm into steel, 127 into cast iron and 98 into aluminium for M3, or 58.8 / 39.2 / 29.4 N.cm for M2. Keep ambient temperature at or below 80 C with peaks no higher than 100 C, and re-grease every 100 km of travel or every 3 to 6 months, whichever comes first. Load and moment ratings are not published for LRM - we confirm them per model, so ask before ordering.
Decide by load character, not by rail size alone. LSH, the larger series, publishes per-carriage dynamic, static and moment ratings you can calculate against, while LRM publishes none and we confirm each model's figures manually. If the load is light, the envelope is tight and smoothness matters, LRM is the right tool; if anything is cantilevered or heavy, LSH gives you numbers to design with. Send the RFQ either way and we will confirm.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AH
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours. We can also confirm the load and moment rating for this model.