Airtac LRM Miniature Linear Guide LRM12N2X120S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X120S10AHT 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 length120 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 LRM12N2X120S10AHT
LRM12N2X120S10AHT is the bottom-mount variant of the 12 mm miniature guide set: a 120 mm stainless-steel rail with two standard recirculating-ball carriages, H accuracy grade and no preload. The trailing T in the code means the fixing holes are arranged so screws are driven from beneath the mounting surface rather than down through the rail's face. The set ships assembled and pre-greased.
Bottom mounting earns its keep when the top of the rail has to stay clear - a reference face, a workpiece, or simply no tool access from above. It also leaves the rail's upper surface uninterrupted, which fixture designers often prefer around covers and wipers. The carriage balls are ISO 3290 G10 Japanese grade, held by a retention design that still demands careful, square insertion during fitting. Double-lip seals and outer covers manage dust and hold the grease in. Keep the surroundings at or below 80 C, with only brief excursions to 100 C. No load or moment rating is published for LRM; request the figure for this exact SKU through the RFQ and we will confirm it.
Airtac LRM Miniature Linear Guide LRM12N2X120S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X120S10AHT |
|---|---|
| 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 | 120 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 LRM12N2X120S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X120 | 2 carriages on a 120 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, 120 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 LRM12N2X120S10AHT Is Used
Electronics assembly slide in a frame channel
Bolted from beneath an aluminium extrusion or machine base, the rail keeps its top face flush and clear where cables and covers pass over it.
Reject diverter on a small parts conveyor
A paddle that swings offcuts or misprints off a narrow belt rides on a short bottom-fixed rail, leaving the belt surface above unobstructed.
Burn-in rack tray carriage
Trays of small boards slide in and out of a test rack; fixing the rail from below frees the top face for the tray runners and stops.
Is the Airtac LRM Miniature Linear Guide LRM12N2X120S10AHT the Right Guide?
Because this rail bolts from below, check that your baseplate has through clearance holes and enough counterbore depth for the screw heads before committing to the T variant. If the mass carried is heavy or overhung - a vertical bracket, for instance - move to AirTAC LSH, which publishes dynamic, static and moment ratings per carriage; LRM offers nothing on paper to size against. Where travel is short and stiffness dominates, LGC's crossed-roller construction is the better match. Confirm on this order: set form, 12 mm rail, standard carriage length, 2 blocks, 120 mm rail, preload A (the forgiving choice for hand-built fixtures, since no clearance is removed at the factory), H accuracy, bottom-mount direction, and a load rating confirmed with us. Both mounting directions are stocked equally, so availability does not favour either.
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 LRM12N2X120S10AHT FAQ
This SKU is 12 mm rail width, 120 mm rail length, two standard carriages, preload A (none), accuracy H (high), bottom-mount (T) fixing. Torque M2 screws to 58.8 N.cm in steel, 39.2 in cast iron, 29.4 in aluminium; M3 to 196, 127 and 98 N.cm respectively. Ambient must not exceed 80 C, with transient peaks to 100 C. Factory grease is Kyodo Yushi PS No. 2, topped up every 100 km of travel or every 3-6 months. AirTAC publishes no load or moment rating for LRM - send the RFQ and we confirm the number for this model.
Envelope and data, mostly. LRM is the compact end of the range: a 12 mm wide rail for light-duty positioning in tight spaces. LSH is the larger series and, crucially, publishes per-carriage dynamic, static and moment ratings you can calculate with - LRM does not, which is why we verify LRM loads individually. If your application carries real mass or overhangs, size it in LSH; if footprint and smoothness dominate and the duty is light, stay with this LRM12 set and let us confirm the rating before you 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 LRM12N2X120S10AHT
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.