Airtac LRM Miniature Linear Guide LRM12L2X345S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X345S10AHT 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 lengthLong carriage
- Carriages2
- Rail length345 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 LRM12L2X345S10AHT
LRM12L2X345S10AHT pairs a 345 mm, 12 mm wide stainless rail with two long ball carriages, drilled for bottom-mount fixing and running without preload (A) at high accuracy (H). It is the under-mounted twin of the 345 mm top-mount set: screws enter from below and sit recessed in the seat, leaving the rail top clear.
Handling is where this family needs respect. The ball-retention design stops the balls spilling in normal use, but AirTAC's own caution is that an angled insertion or a rushed swap can still drop them - keep the carriage square to the rail, and consider a dummy rail if carriages will be changed in service. The 345 mm rail is a cut from the 1005 mm catalogue full length for size 12, drilled to your offset. Inside sit Japanese ISO 3290 G10 balls - that grade describes the balls only - behind double-lip seals under an outer cover. Load and moment ratings are not published for LRM; we confirm them for this exact model before ordering, so start with an RFQ. Keep ambient temperature at or below 80 C, peaks 100 C.
Airtac LRM Miniature Linear Guide LRM12L2X345S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X345S10AHT |
|---|---|
| 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 | Long carriage |
| Carriages supplied | 2 |
| Rail length | 345 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 LRM12L2X345S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X345 | 2 carriages on a 345 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, 345 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 LRM12L2X345S10AHT Is Used
Machine-vision focus rail
Carrying a compact camera head along a 345 mm focus axis inside a machine-vision enclosure; bottom mounting keeps the rail top flush beneath the light hood.
Desktop laser engraver Y axis
The light Y axis of a small engraving frame, where the 12 mm rail tucks under the gantry plate and no screw heads stand proud in the beam path.
Laboratory pipetting robot axis
A reagent plate shuttle in a low-volume lab robot; the carriage slides freely without preload so the drive motor sees minimal resistance on every cycle.
Is the Airtac LRM Miniature Linear Guide LRM12L2X345S10AHT the Right Guide?
Heavy or cantilevered loads belong on LSH, which publishes per-carriage dynamic, static and moment ratings for sizing; LRM does not, so capacity here is a conversation with us rather than a table lookup. Short travels that need crossed-roller rigidity point to LGC instead. Before ordering this under-mounted set, confirm: complete-set form, 12 mm rail width, long carriage, two blocks, 345 mm rail length, preload A (smooth but least stiff), accuracy H, bottom-mount fixing - and the load rating for this model. If a carriage ever needs replacing on its own, remember our carriage-only stock runs to just four SKUs, so plan spares as a set or 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 LRM12L2X345S10AHT FAQ
Published facts: 12 mm rail width, 345 mm rail length, two long carriages, preload A (none), accuracy H (high), bottom-mount fixing, 10 mm first-hole offset, 80 C ambient limit (peaks 100 C). Screws torque to 58.8 N.cm (M2) or 196 N.cm (M3) into steel, 39.2 / 127 N.cm into cast iron and 29.4 / 98 N.cm into aluminium. Factory grease is Kyodo Yushi PS No. 2; renew every 100 km of travel or every 3 to 6 months. Load and moment ratings are deliberately absent from the LRM catalogue - we confirm them per model on request.
When the payload grows or overhangs the carriage, LRM stops being the tool: it carries no published load table, whereas LSH lists dynamic, static and moment ratings per carriage that an engineer can calculate against directly. Likewise, if the axis must resist twist over very short travel, LGC's crossed rollers outperform ball-type guides. Within its envelope - light payloads, tight space, 345 mm of travel - this bottom-mounted set with preload A and two long blocks does the job with minimal drag.
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 LRM12L2X345S10AHT
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.