Airtac LRM Miniature Linear Guide LRM12N2X320S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X320S10AHT 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 length320 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 LRM12N2X320S10AHT
LRM12N2X320S10AHT is the bottom-mount version of the AirTAC LRM12 set: a 320 mm stainless-steel rail, 12 mm wide, with a 10 mm end-hole offset and two standard-length recirculating-ball carriages fitted on delivery. The trailing T in the code puts the fixing holes through the rail so it bolts down from underneath. Preload is A - none - accuracy is H, high.
Bottom-mount fixing earns its place on machines where the top face of the rail must stay clear - a cover strip, a worktable skin or a guard passes over the rail while the screws sit hidden beneath. Because either side of the rail can serve as the datum face, you can reference the rail from whichever edge suits the frame; with two carriages on one rail, put both datum references on the same side for better running accuracy. The LRM family is a common-rail design, so standard and long carriages share this same rail profile. Carriages run on Japanese-made ISO 3290 G10 balls - a grade for the balls alone - behind a double-lip seal and an outer cover. Ambient temperature must not exceed 80 C, with peaks to 100 C; and remember that on an inclined rail the carriage can slide off under its own weight, so hold it during handling. Load and moment ratings are not published for LRM - confirm them per model through the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X320S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X320S10AHT |
|---|---|
| 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 | 320 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 LRM12N2X320S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X320 | 2 carriages on a 320 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, 320 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 LRM12N2X320S10AHT Is Used
Retrofit into an existing jig
A maintenance team drops a 320 mm axis into an old fixture whose top plate cannot be drilled; bottom-mount fixing lets the rail fasten from below without touching the working surface.
Fast-cycling pick station
A small pick-and-place head shuttles between feeder and nest on a short stroke; two carriages keep the overhanging head level through each rapid reversal.
Cable-dragging lab axis
A cable-harnessed axis on a benchtop analyzer routes its loom over the rail top side; with screws recessed underneath, nothing snags the moving harness.
Is the Airtac LRM Miniature Linear Guide LRM12N2X320S10AHT the Right Guide?
Because LRM publishes no dynamic, static or moment ratings, the sizing decision starts elsewhere: if the load is significant or overhung, LSH gives you published per-carriage ratings to work through, and LGC answers short-travel jobs that need crossed-roller rigidity. Keep this LRM set when the envelope is tight and the duty is light. Match on: complete-set form, 12 mm rail width, standard carriage length, two carriages, 320 mm rail, 10 mm end offset, preload A - chosen here for free, low-drag running, accepting that unpreloaded guides tolerate the least shock - accuracy H, and bottom-mount fixing, which is the defining difference from the non-T variant of the same set. Confirm the load rating with us before ordering.
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 LRM12N2X320S10AHT FAQ
Complete set: 12 mm wide stainless rail, 320 mm long, 10 mm end-hole offset, bottom-mount fixing (the trailing T in the code), two standard-length carriages, preload A (none), accuracy grade H. M3 screws torque to 196 N.cm into steel, 127 N.cm into cast iron and 98 N.cm into aluminium; M2 screws take 58.8, 39.2 and 29.4 N.cm. Ambient temperature limit is 80 C with transient peaks to 100 C. Re-grease every 100 km of travel or every 3 to 6 months, topping up through the lubrication hole at the rear of the carriage; grease quantities vary per model. Basic dynamic, static and moment load ratings are not published for LRM - we confirm them for this exact model on request.
The 320 mm rail comes with both carriages fitted and pre-filled with Kyodo Yushi PS No. 2 grease; screws and top-up lubricant are not supplied. Bottom-mount means the fixing holes run through the rail so it bolts from beneath - ideal where the top face stays clear for a cover or work surface - while the top-mount variant of the same set screws down from above. Before first use, wipe off the rust-preventive oil and apply fresh lubricant. One handling note specific to the fitted carriages: even with ball retention, sliding a carriage onto or off a rail at an angle can drop balls, and on an inclined rail the carriage can slide away under its own weight, so handle it deliberately.
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 LRM12N2X320S10AHT
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.