Airtac LRM Miniature Linear Guide LRM12L2X370S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X370S10BHT 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 length370 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 LRM12L2X370S10BHT
LRM12L2X370S10BHT is a complete AirTAC LRM miniature linear guide: a single 12 mm wide stainless-steel rail, 370 mm long, carrying two long recirculating-ball carriages. The trailing T in the code specifies a bottom-mount rail, so the fixing screws are driven from underneath the mounting surface - the answer when the top face is the working surface or simply out of reach. Preload is grade B (light) and accuracy grade H.
Each carriage runs Japanese ISO 3290 G10 balls - the grade applies to the balls alone, not to the assembly - behind a double-lip seal that scrapes oil back and keeps dust out, with an outer cover shielding the seal strip and hiding the screw holes. Ball retention keeps the balls in place during handling, though an angled fit or a rushed swap can still drop them. Ambient temperature must stay at or below 80 C, with brief peaks to 100 C. AirTAC publishes no load or moment ratings for LRM; send an RFQ and we confirm the figures for this exact configuration.
Airtac LRM Miniature Linear Guide LRM12L2X370S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X370S10BHT |
|---|---|
| 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 | 370 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 LRM12L2X370S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X370 | 2 carriages on a 370 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, 370 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 LRM12L2X370S10BHT Is Used
Benchtop pick-and-place head
A compact desktop pick-and-place shifting small connectors between trays suits a 12 mm rail with two long carriages; the long blocks give a wider bearing span against tipping when the head swings off-centre.
Optical inspection stage
A bench microscope station that translates a PCB under the lens at low, steady speed gains repeatable travel from the grade H rail and light preload B fit.
Laser alignment slide
Truing up a low-power laser diode on an optics table calls for fine, even motion; light preload keeps the slide easy to move by hand without perceptible slop.
Is the Airtac LRM Miniature Linear Guide LRM12L2X370S10BHT the Right Guide?
If the load on this rail will be substantial or cantilevered over an edge, step up to the AirTAC LSH series: it publishes dynamic, static and moment ratings per carriage, which LRM does not, so you can actually run the sizing sums. For short travels where crossed-roller rigidity matters more than stroke, compare the LGC series. Before ordering, tick off: form (complete set with rail), rail width 12 mm, long carriages, two blocks, 370 mm rail, preload B - light preload fits easier but yields slightly more under load - accuracy H, bottom-mount direction, and the load rating confirmed with us for this exact model.
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 LRM12L2X370S10BHT FAQ
Rail width 12 mm, rail length 370 mm, two long carriages on one rail, preload grade B (light), accuracy grade H, bottom-mount rail fixing. Tighten M2 screws to 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 screws to 196, 127 and 98 N.cm respectively. Keep ambient temperature at or below 80 C (100 C peaks). Re-grease with Kyodo Yushi PS No. 2 every 100 km of travel or every 3 to 6 months. Load, moment, running-parallelism and speed ratings are not published for LRM - we confirm them per model on request.
Choose LRM when the envelope is tight and the duty is light: this 12 mm set is about footprint, smoothness and travel accuracy. Choose LSH when a heavier or overhung load needs published dynamic, static and moment ratings per carriage to size against, since LRM offers no such table. If the question is rigidity over a short stroke, LGC crossed rollers is the third option. Send us the layout and we will confirm the load rating for whichever model fits.
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 LRM12L2X370S10BHT
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.