Airtac LRM Miniature Linear Guide LRM12L1X120S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X120S10AHT is a miniature linear guide on a 12 mm stainless-steel rail with recirculating-ball carriage. 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
- Carriages1
- 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 LRM12L1X120S10AHT
Order code LRM12L1X120S10AHT specifies the bottom-mount version of the LRM12 miniature guide: a 120 mm long, 12 mm wide stainless-steel rail with a single long carriage riding on recirculating balls. The trailing T in the code is the mounting direction - the rail is secured by screws reached from below the mounting plate, which suits frames where the upper surface cannot be drilled or is already occupied. One assembled set per box.
Because the rail is clamped from beneath, the mounting surface does the accuracy work: grind or finish-mill it before fitting, and note that either side of the rail can serve as the datum face. Inside the carriage, Japanese ISO 3290 G10 balls recirculate in the common LRM rail profile, sealed by a double-lip seal under an outer cover that keeps chips away from the seal strip. Keep the ambient temperature at or below 80 C, with 100 C as a transient peak - worth checking if the guide sits near a heater or a laser. AirTAC publishes no load or moment figures for LRM; request them from us and we confirm the capacity of this exact model.
Airtac LRM Miniature Linear Guide LRM12L1X120S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X120S10AHT |
|---|---|
| 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 | 1 |
| 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 LRM12L1X120S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X120 | 1 carriage 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, 1 |
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 LRM12L1X120S10AHT Is Used
Under-bench measuring fixture
A flat inspection plate whose working face must stay clean and uninterrupted: bottom-mount fixing hides the rail screws beneath the plate, so nothing protrudes above the measuring surface.
Semiconductor pick head rail
A light pick head making short indexing moves over a wafer tray, where the 12 mm envelope fits inside a compact handler frame and the long carriage steadies the head at the end of its reach.
Small-format 3D printer gantry
A custom compact printer axis with a fully occupied top plate: fixing the 120 mm rail from below leaves the visible surface free for the belt and tool path, and the ball-retention design eases maintenance.
Is the Airtac LRM Miniature Linear Guide LRM12L1X120S10AHT the Right Guide?
Check three things before committing to this bottom-mount set. First, capacity: LRM publishes no dynamic, static or moment ratings, so a heavy or overhung load belongs on LSH, whose datasheet lists per-carriage ratings you can size against; if the travel is short and crossed-roller rigidity matters more than smooth travel, LGC is the closer fit. Second, the mounting method: bottom-mount demands a well-finished surface and physical access to the screw positions from below - confirm your frame allows it. Third, the match list: complete set, 12 mm rail width, long carriage, one carriage on a 120 mm rail, preload A (the free-running grade, easiest to install but the softest under reversing loads), accuracy H, bottom-mount direction, and the load rating we confirm for this model via RFQ.
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 LRM12L1X120S10AHT FAQ
The T code means bottom-mount: fix the rail with screws inserted from below a ground or finish-milled surface, either side usable as the datum. Torque M2 screws to 39.2 N.cm into cast iron (58.8 N.cm into steel), M3 screws to 127 N.cm (196 N.cm into steel). The set is 12 mm rail width, 120 mm rail length, one long carriage, preload A (none), accuracy H. Ambient limit is 80 C with 100 C transients. Top up the Kyodo Yushi PS No. 2 grease every 100 km of travel or every 3 to 6 months; charge quantities are per model, from 0.02/0.01 up to 1.0/0.50 cm3. Load and moment ratings are not published for LRM - we confirm them per model.
One assembled set: the 120 mm stainless rail with the long carriage already fitted and pre-greased. Bottom-mount fixing is the only difference from the standard version - nothing changes about the carriage or the accuracy grade H. The rail is stainless steel; the catalogue does not state the carriage base material, so ask us if that matters for your build. If you later need a spare carriage on its own, plan a special order, because only a few carriage-only SKUs sit in our stock.
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 LRM12L1X120S10AHT
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.