Airtac LRM Miniature Linear Guide LRM12L2X320S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X320S10AHT 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 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 LRM12L2X320S10AHT
LRM12L2X320S10AHT is a bottom-mount miniature guide set: a 12 mm wide stainless-steel rail cut to 320 mm with 10 mm end-hole offsets, carrying two long recirculating-ball carriages on accuracy grade H. The T suffix puts the fixing holes in the rail base so screws enter from below - useful where the top face must stay uninterrupted or the screws are simply unreachable once assembled.
With no preload (grade A), the carriages glide with minimal drag, which suits manually pushed stages and gently driven mechanisms rather than preloaded, high-stiffness axes. High accuracy H is the series' standard precision grade, the recirculating balls are Japanese-made to ISO 3290 G10 for roundness, the double-lip seal manages oil retention and dust exclusion, and the outer cover screens the seal strip from larger debris. Ambient temperature must stay at or below 80 C with peaks to 100 C. There is no published load or moment rating for LRM - send the RFQ with your load case and we confirm the figures for this configuration.
Airtac LRM Miniature Linear Guide LRM12L2X320S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X320S10AHT |
|---|---|
| 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 | 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 LRM12L2X320S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long 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 LRM12L2X320S10AHT Is Used
Measuring microscope stage
A measuring microscope's part stage pushed by hand glides freely with no preload, and high accuracy H keeps the travel honest over the 320 mm axis.
Vision inspection slider
A camera slider under a benchtop vision system gains smooth, drag-free motion from preload A while the bottom-mount rail hides inside the frame.
Sensor probe test rig
A rig presenting components to a probe on a 320 mm stroke uses two long carriages to keep the pallet level as it advances and retracts.
Is the Airtac LRM Miniature Linear Guide LRM12L2X320S10AHT the Right Guide?
A 100 km re-grease interval sounds generous until you do the arithmetic: a 200 mm stroke cycling once per second covers 100 km in roughly three weeks of continuous running, so distance rather than the calendar sets the service rhythm on a busy 320 mm axis. If the load is substantial or cantilevered, step up to LSH, whose per-carriage dynamic, static and moment ratings are published and can be sized against - the very numbers LRM withholds. If the travel is short and crossed-roller rigidity matters more than glide, look across at LGC. Before ordering, fix down the whole spec: set form (complete), 12 mm rail width, two long carriages, 320 mm rail length, preload A none, accuracy H high, bottom-mount direction - then let us confirm the load rating 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 LRM12L2X320S10AHT FAQ
Rail width 12 mm, rail length 320 mm, two long carriages, 10 mm end-hole offset, preload A (none), accuracy H (high), bottom-mount fixing. Catalogue screw torques: M2 - 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 - 196, 127 and 98 N.cm for the same materials. Ambient temperature is capped at 80 C with peaks of 100 C, and re-greasing with Kyodo Yushi PS No. 2 falls due every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM; we confirm them for this model when you enquire.
Yes - the code is a complete set: one 320 mm stainless rail with two long carriages fitted and pre-filled with Kyodo Yushi PS No. 2 grease. On an inclined rail a carriage can slide off under its own weight, so hold it during handling, and do not strike the rail, since accuracy can suffer with no visible damage. If you later need a spare carriage, note that carriage-only SKUs are thin in the range and most become a special order - the ball-retention design helps, but a dummy rail is still the safe way to swap a block.
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 LRM12L2X320S10AHT
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.