Airtac LRM Miniature Linear Guide LRM12N2X185S5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X185S5AH 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 length185 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 LRM12N2X185S5AH
This is a complete AirTAC LRM12 miniature linear guide set: one 185 mm long, 12 mm wide stainless-steel rail carrying two standard-length recirculating-ball carriages, delivered pre-assembled and pre-filled with Kyodo Yushi PS No. 2 grease. Nothing else to purchase - the set is the rail and the two blocks, ready to bolt down from above. The S5 end offset puts the outermost fixing holes just 5 mm from the rail ends, so very little rail sits idle beyond the last screw.
Running preload-free (code A), drag is at its lowest and motion feels even and free - the trade-off being a little more play under varying loads than a preloaded set. AirTAC builds the range around a common rail profile, ball retention that keeps the balls from scattering during handling, Japanese-made ISO 3290 G10 balls inside the carriage, a double-lip seal for oil retention and dust exclusion, and an outer cover shielding the seal strip and screw heads. Ambient temperature must stay at or below 80 C, with transient peaks no higher than 100 C. Two blocks on one rail also lengthen the effective base against tipping along the travel direction. Load and moment ratings are not published for LRM; we confirm the figures for your exact model - send us the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X185S5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X185S5AH |
|---|---|
| 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 | 185 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 LRM12N2X185S5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X185 | 2 carriages on a 185 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, 185 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 LRM12N2X185S5AH Is Used
Compact XY optics stage
A benchtop positioning stage for a camera or laser diode, where a 185 mm stroke and free-running, low-drag travel make fine manual and motorised adjustment easy.
Small pick-and-place gantry
A light-duty gantry moving SMD trays between feeders and a bench press; the two-block layout helps keep the head steady along the direction of travel.
Laboratory autosampler slide
A sampling slide carrying a syringe probe between vial positions, where smooth, un preloaded motion protects reproducible probe placement.
Is the Airtac LRM Miniature Linear Guide LRM12N2X185S5AH the Right Guide?
If the load is substantial or hangs off a cantilever, step up to AirTAC LSH instead: that series publishes per-carriage dynamic, static and moment ratings you can size against, which LRM does not. If travel is short and crossed-roller rigidity matters more than stroke, LGC is the closer match. Size 12 is also the deep end of the LRM range - 924 of the 988 sets listed are LRM12 - so a design laid out around a 12 mm rail is the most straightforward to source in the family.
Before ordering, run the checklist: complete-set form, 12 mm rail width, standard carriage length, two blocks, 185 mm rail length, preload A (free-running, easiest to install, least rigid), accuracy H, top-mount fixing - and confirm the load rating with us before committing.
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 LRM12N2X185S5AH FAQ
Rail width is 12 mm, rail length 185 mm, with two standard-length carriages, preload grade A (none), accuracy grade H (high), top-mount rail fixing and a 5 mm end-hole offset. Screw torques are 58.8 N.cm (M2) into steel, 39.2 N.cm into cast iron, 29.4 N.cm into aluminium; for M3 screws, 196, 127 and 98 N.cm in the same order. The ambient temperature limit is 80 C with transient peaks to 100 C, and re-greasing falls due every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM; we confirm them for this exact model on request.
Choose LRM when the envelope is tight and the duty is light - this 12 mm set is 185 mm long with two compact blocks. Choose LSH when you need published dynamic, static and moment ratings to size a heavier or cantilevered load against, because LRM publishes none of those figures. For light-duty compact mechanisms, LRM works well, and we will confirm its load rating for this model before you order - just send the RFQ.
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 LRM12N2X185S5AH
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.