Airtac LRM Miniature Linear Guide LRM12N2X275S12.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X275S12.5AH 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 length275 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 LRM12N2X275S12.5AH
This LRM12N2X275S12.5AH kit pairs a 275 mm stainless-steel rail, 12 mm wide, with two standard-length recirculating-ball carriages running free of preload - the A grade - at high accuracy (H). The end holes sit 12.5 mm in from the rail ends, a half-step offset that some fixture hole patterns call for, and the rail fixes top-mount with screws from above.
No preload is the smoothest choice on LRM: carriage glide is at its freest, which suits hand-fed stages and anything a light actuator moves, but a small amount of play is present compared with grades B and C. The guide runs on ISO 3290 G10 grade balls - a grade for the balls themselves, not an assembly standard - held by the retainer so they stay aboard during fitting, sealed by a double lip and shielded by the outer cover. Watch the calendar as well as the distance: grease is due every 100 km or every 3 to 6 months, whichever comes first, and on a busy 200 mm stroke the 100 km mark can arrive inside three weeks of continuous running. Ambient temperature: 80 C maximum, 100 C in short peaks. Load and moment ratings are not published for LRM; we confirm them for this part number via the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X275S12.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X275S12.5AH |
|---|---|
| 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 | 275 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 LRM12N2X275S12.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X275 | 2 carriages on a 275 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, 275 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 LRM12N2X275S12.5AH Is Used
Desktop micro-engraving slide
A small engraving or marking gantry where the tool head is light and the operator jogs axes by hand; preload A keeps motion effortless while the H grade protects finished surface quality.
Small-parts kitting cell
Feeding tiny clips or springs from bowl to blister tray; the common-rail profile lets a long-body carriage from the same LRM family take over the rail if the kit head grows.
Lead-forming station
A component lead straightening and forming fixture on an electronics bench: the carriage carries the forming die across short, frequent moves, and the ball-retention design stands up to the handling a retooled cell sees.
Is the Airtac LRM Miniature Linear Guide LRM12N2X275S12.5AH the Right Guide?
Weigh the alternatives honestly. When the load is significant or reaches out on a cantilever, LSH is the correct step up: its catalogue carries per-carriage dynamic, static and moment ratings that support a real sizing calculation, which LRM deliberately lacks. Where the stroke is short and stiffness per millimetre matters more than travel, LGC and its crossed rollers are the stronger pick. For LRM12N2X275S12.5AH itself, verify each item: set form (rail included), 12 mm rail width, standard carriage length, two blocks, 275 mm rail length, preload A with its play-versus-glide trade-off, high H accuracy, top-mount mounting, and the load rating confirmed with us before you order.
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 LRM12N2X275S12.5AH FAQ
Rail width 12 mm; rail length 275 mm with end holes offset 12.5 mm; two standard-length carriages; preload A (none); accuracy grade H (high); top-mount rail fixing. M3 screws torque to 196 N.cm in steel, 127 N.cm in cast iron and 98 N.cm in aluminium. Ambient limit 80 C, peaks 100 C. Re-grease every 100 km of travel or every 3 to 6 months. One thing is deliberately absent: LRM publishes no load or moment ratings, so we confirm them for this exact model through the RFQ.
If the load is light and the envelope tight, LRM12 is hard to beat - the 12 mm rail keeps the cross-section small, and size 12 is the depth of our stock (924 of 988 stocked sets), so a 275 mm kit ships quickly. If the load is substantial or cantilevered, choose LSH: its catalogue publishes dynamic, static and moment ratings per carriage that let you calculate safety margins, which LRM does not offer. For a short stroke needing crossed-roller rigidity, LGC is the alternative. Either way, tell us the load and we will confirm the right part before ordering.
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 LRM12N2X275S12.5AH
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.