Airtac LRM Miniature Linear Guide LRM12N2X125S12.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X125S12.5AH 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 length125 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 LRM12N2X125S12.5AH
LRM12N2X125S12.5AH is a complete AirTAC LRM guide set built around a 12 mm wide stainless rail, 125 mm long, with a pair of standard carriages fitted and end holes set 12.5 mm in from each rail end. Preload grade A means the carriages run free of built-in preload, and accuracy grade H is the high grade. The rail fixes from above, with screws through the top face.
The 12.5 mm end offset defines the screw-hole spacing near the rail ends, which matters when your bed pattern is already fixed. Design points worth knowing: the balls are Japanese-made ISO 3290 G10 grade (that grade applies to the balls themselves, not the assembly), a double-lip seal scrapes oil and excludes dust, and an outer cover hides the screw heads and shields the seal strip. Ball retention keeps the balls in place during handling, but it is a handling aid rather than a promise - fitting the carriage at an angle or swapping it quickly can still drop balls, so keep a dummy rail if you plan repeated carriage changes. The ambient temperature limit is 80 C, peaks 100 C. Load and moment figures are confirmed per model - send the RFQ and we will get them for you.
Airtac LRM Miniature Linear Guide LRM12N2X125S12.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X125S12.5AH |
|---|---|
| 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 | 125 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 LRM12N2X125S12.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X125 | 2 carriages on a 125 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, 125 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 LRM12N2X125S12.5AH Is Used
Micro-dispensing gantry
A benchtop dispenser that lays adhesive dots on PCBs rides on this 12 mm set; the pair of carriages resists the small pitch that would otherwise tip a cantilevered needle head during acceleration.
Optical bench alignment slide
On an optical table, a 125 mm slide carrying a mirror mount lets you trim beam position by hand with repeatable, low-stiction motion thanks to the zero-preload grade A fitting.
Small comparator metrology fixture
A quality bench that slides small machined parts past a dial or vision sensor uses the H accuracy grade for repeatability, with the 12 mm rail fitting inside a tight fixture body.
Is the Airtac LRM Miniature Linear Guide LRM12N2X125S12.5AH the Right Guide?
Sizing first: LSH publishes dynamic, static and moment ratings per carriage, so any load that is heavy or overhung should be checked there; LRM gives you no published numbers to size against. For short-travel work where crossed-roller stiffness beats ball smoothness, look across at LGC. The checklist for this series: complete set or carriage only, 12 mm rail width here, standard or long carriage, carriage count, 125 mm rail length, preload grade (A is free-running; B light and C medium stiffen the travel at the cost of drag), H or P accuracy, top or bottom mounting, and confirmation of the load rating with us before you commit. Replacement carriages are worth planning early - we carry only a handful of carriage-only SKUs, so most spares are a special 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 LRM12N2X125S12.5AH FAQ
Rail width 12 mm; rail length 125 mm with holes 12.5 mm from each end; two standard-length carriages; preload grade A (none); accuracy grade H (high); top-mount rail. Fastening: 58.8 N.cm for M2 screws into steel, 196 N.cm for M3, with cast iron and aluminium taking less. Ambient temperature must not exceed 80 C, transient peaks 100 C. Lubrication: ships with Kyodo Yushi PS No. 2, top up 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 for this model on request via the RFQ.
Choose LSH when you need published numbers to size against - that series lists basic dynamic, static and moment ratings per carriage, plus running-parallelism data, none of which LRM publishes. Choose LRM when the envelope is miniature and the duty is light, and the choice rests on size, smoothness and precision rather than a datasheet figure. If you are unsure which side your application falls on, send the load, moment and duty cycle with the RFQ and we will confirm the right series and the actual ratings.
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 LRM12N2X125S12.5AH
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.