Airtac LRM Miniature Linear Guide LRM12N2X270S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X270S10AHT 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 length270 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 LRM12N2X270S10AHT
The T at the end of LRM12N2X270S10AHT changes how the rail is fixed: this is the bottom-mount version, taking its screws from the underside of the rail instead of the top. It is otherwise the same kit - a 12 mm stainless-steel rail, 270 mm long, two standard-length recirculating-ball carriages fitted, 10 mm end-hole offset, preload A (none), accuracy H. Choose it when the top face of the rail line is occupied by the moving table or when screws cannot be reached from above.
Bottom-mount fixing rewards a properly prepared seat: the mounting surface should be ground or finish-milled to achieve the rated travel accuracy, and seat flatness matters just as much from below. Either side of the rail can serve as the datum face. Inside, the design is standard LRM: Japanese-made balls to ISO 3290 grade G10 in the recirculating circuit, ball retention to keep the circuit loaded during handling, a double-lip seal and an outer cover. Keep the ambient at or below 80 C with peaks to 100 C - worth remembering if the guide runs near a heater bank or a curing lamp. Load and moment ratings are not published for LRM; confirm the figures for this model with us through the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X270S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X270S10AHT |
|---|---|
| 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 | 270 mm (spliced sections) |
| 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 LRM12N2X270S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X270 | 2 carriages on a 270 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, 270 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 LRM12N2X270S10AHT Is Used
Automated microscope focus column
A vertical focus axis under a lab microscope benefits from bottom-mount fixing, which keeps the rail's upper face clear for the bracket and the position scale.
Benchtop engraver retrofit
Converting an old engraving or plotting bed to ball-guide motion is a weekend job: bolt the rail from beneath, attach the carriage plate, and the table glides instead of slides.
Small-parts feeder in a packaging line
Light feeder pushes and pick stations run millions of short cycles; a smooth miniature rail keeps the motion consistent without grease migrating onto the product.
Is the Airtac LRM Miniature Linear Guide LRM12N2X270S10AHT the Right Guide?
The first decision here is installation, not rating: if your machine bed hides the rail's top face, bottom-mount (this SKU) is the clean answer; if screws are easy to reach from above, the non-T version is simpler to align and service. For load sizing, remember LRM publishes nothing - we confirm the per-model figures at RFQ. When the load is genuinely heavy or cantilevered, step up to AirTAC LSH, whose published per-carriage dynamic, static and moment ratings let you calculate properly; for short travel needing crossed-roller rigidity, look across at LGC. Then confirm the rest of the match: complete set with two standard carriages, 12 mm rail width, 270 mm rail length, preload A (none - the least rigid but the easiest to install without bind), accuracy H, and bottom-mount direction.
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 LRM12N2X270S10AHT FAQ
Size 12 rail, 12 mm wide and 270 mm long, end holes offset 10 mm; two standard-length carriages; preload A (none); accuracy H (high); bottom-mount rail fixing (the trailing T). M3 screws torque to 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium; M2 screws to 58.8 / 39.2 / 29.4 N.cm. Ambient temperature limit is 80 C, with peaks no higher than 100 C, and re-greasing is due every 100 km of travel or every 3 to 6 months. AirTAC does not publish load or moment ratings for LRM; we confirm the figures for this model via the RFQ.
The contents are the same complete set - rail with two fitted carriages - but the rail is the bottom-mount type, fixed from below rather than through the top. Plan the mounting holes in your machine bed accordingly and make sure the seat is ground or finish-milled. As with any LRM set, avoid striking the rail during installation: hidden damage can affect accuracy and service life. If you need a spare carriage instead of a whole set, our carriage-only range is limited and most spares are special orders requiring the pairing code off the original part.
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 LRM12N2X270S10AHT
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.