Airtac LRM Miniature Linear Guide LRM12N2X345S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X345S10BHT 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 length345 mm
- AccuracyH — high grade
- PreloadB — light 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 LRM12N2X345S10BHT
The trailing T in LRM12N2X345S10BHT changes how the rail sits in your machine: fixings are reached from underneath, so no screw head stands proud of the rail surface. That matters wherever a part, a lens or a product has to pass close over the guide. You get a 12 mm wide stainless-steel rail, 345 mm long, with two standard recirculating-ball carriages, shipped as one assembled set.
Preload grade B adds a light internal pre-stress to the Japanese-made ISO 3290 G10 balls - a grade that applies to the balls themselves - for running with minimal play at modest drag. The double-lip seal and outer cover work together on dust and debris, and every LRM12 carriage uses the same rail profile. One maintenance reality to plan for: re-greasing is due every 100 km of travel or every 3 to 6 months, whichever comes first, and the carriage is topped up through the lubrication hole at its rear. Keep the environment at or below 80 C, with only brief excursions to 100 C. The manufacturer publishes no load or moment rating for LRM; we confirm it for this exact model via the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X345S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X345S10BHT |
|---|---|
| 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 | 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 | B — light 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 LRM12N2X345S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X345 | 2 carriages on a 345 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| B | B — light 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 LRM12N2X345S10BHT Is Used
Machine-vision camera traverse
Moving an inspection camera over a production strip needs a guide whose top face stays flush so parts can pass beneath the lens - bottom-mount fixings recess the screws below the rail surface.
PCB marking head slide
A laser marking head traversing across printed circuit boards rides on a light-preloaded pair of carriages, keeping the spot position steady without stiff drag fighting the belt drive.
Sensor carriage on a test rig
A profilometry or thickness sensor carried along a test article needs repeatable lateral position. High accuracy grade H keeps the running straight, and the stainless rail suits a shop-floor environment.
Is the Airtac LRM Miniature Linear Guide LRM12N2X345S10BHT the Right Guide?
If your calculation needs hard numbers, step up to LSH: it lists per-carriage dynamic, static and moment ratings, which LRM deliberately does not. Cantilevered or substantial loads belong there. For short travels where rigidity per millimetre matters most, crossed-roller LGC is the alternative. Choosing this BHT set means confirming: form (complete set), 12 mm rail width, standard carriage length, block count two, 345 mm rail length, light preload B - a stiffer feel with slightly more drag - H accuracy, bottom-mount direction, and a load figure we confirm for the exact model on request. Cutting the rail length is the quickest way to cut the price.
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 LRM12N2X345S10BHT FAQ
From the catalogue: 12 mm rail width, 345 mm rail, two standard blocks, light preload B, high accuracy H, bottom-mount rail. Torque M3 screws to 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). Keep the ambient at or under 80 C with peaks to 100 C, and re-grease after every 100 km of travel or every 3 to 6 months. There is no published load or moment rating for LRM; we supply the confirmed figure for this code on request.
Fit each carriage onto the rail square and slowly. The ball-retention design keeps the balls captive in normal handling, but an angled entry or a hasty swap can still drop them - the manufacturer suggests a dummy rail as an aid. Avoid striking the rail and never dismantle a carriage; hidden damage costs accuracy with no visible sign. Since only four carriage-only SKUs sit in our stock, a spare carriage for field replacement is normally a special order - plan ahead.
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 LRM12N2X345S10BHT
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.