Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AP
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AP 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
- AccuracyP — precision 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 LRM12N2X250S12.5AP
The LRM12N2X250S12.5AP is the precision-grade version of the two-carriage 250 mm set: a 12 mm stainless-steel rail carrying two standard recirculating-ball carriages, finished to AirTAC's P grade rather than the standard H grade. P is the tighter of the two accuracy classes offered on LRM, specified where parallel running and consistent tracking matter more than price.
Both carriages ship on the rail, pre-filled with Kyodo Yushi PS No. 2 grease and ready to run after you wipe off the rust-preventive oil and re-lubricate. Ball retention keeps the balls seated during handling, the Japanese-made balls in the recirculating circuit are graded ISO 3290 G10 for roundness, and the double-lip seal with its outer cover keeps contamination out of the raceways. Ambient temperature must not exceed 80 C, with short peaks to 100 C. No load or moment rating is published for LRM; the figures are confirmed per model, so put this SKU in an RFQ and we will return the numbers before you commit.
Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AP Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AP |
|---|---|
| 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 | P — precision 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 LRM12N2X250S12.5AP
| 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. |
| P | P — precision 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 LRM12N2X250S12.5AP Is Used
Optics bench translation stage
Aligning lenses or detectors on a breadboard calls for friction-free, repeatable slides; a precision-grade 12 mm guide moves mirror holders without stick-slip.
Fiber-optic alignment fixture
Coupling a fiber to a photonic device demands repeatable, drift-free positioning; precision P grade keeps both carriages tracking the same line over 250 mm.
Semiconductor die inspection station
A microscope camera riding a dual-carriage rail over wafer strips stays steady at each die position, and the P grade supports frame-to-frame consistency.
Is the Airtac LRM Miniature Linear Guide LRM12N2X250S12.5AP the Right Guide?
One planning note that surprises buyers: across our stocked LRM sets prices run from roughly $66 to $831 with only two rail widths in play, so rail length and carriage count - not rail size - drive the cost. Trim travel before you trim size. For genuinely heavy or cantilevered loads, step up to AirTAC LSH, which publishes the per-carriage dynamic, static and moment ratings LRM lacks; for short travel needing crossed-roller rigidity, step across to LGC. Check before you order: this is a complete set (rail and two carriages), 12 mm rail width, standard carriage, 250 mm rail, preload A (none - freest rolling, least rigid, easiest to install without binding), accuracy P (precision), top-mount fixing, and a load rating confirmed with us via RFQ.
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 LRM12N2X250S12.5AP FAQ
A 12 mm wide stainless rail, 250 mm long, with end holes 12.5 mm from each end, carrying two standard-length carriages. Preload is grade A (none) and accuracy is P (precision), the tighter of LRM's two grades; the rail mounts from the top. M3 screws take 196 N.cm into steel, 127 N.cm into cast iron and 98 N.cm into aluminium (M2: 58.8 / 39.2 / 29.4 N.cm). Ambient limit is 80 C with 100 C transient peaks; re-grease every 100 km of travel or every 3 to 6 months. AirTAC publishes no load or moment ratings for LRM - we confirm them for this model through the RFQ.
One complete set: the 250 mm stainless rail with both carriages factory-fitted, greased with Kyodo Yushi PS No. 2 and protected by rust-preventive oil you wipe off before first use. There is no separate rail or carriage to buy. If you later need a spare carriage on its own, note that carriage-only codes need a pairing letter matching the rail and that our carriage-only stock is thin - most spares are special orders. The black chrome finish and cut-to-length rails exist in the catalogue but are not stocked; they are available to order.
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 LRM12N2X250S12.5AP
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.