Airtac LRM Miniature Linear Guide LRM12L1X340S7.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X340S7.5AH 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 length340 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 LRM12L1X340S7.5AH
LRM12L1X340S7.5AH is a complete miniature linear guide: one stainless-steel rail, 12 mm wide and 340 mm long, with a single long recirculating-ball carriage riding on it, pre-filled with Kyodo Yushi PS No. 2 grease. The 7.5 mm S value is the end-hole offset - the first mounting hole sits 7.5 mm from the rail end, which buys a little extra usable travel at each end of the stroke compared with the 10 mm variant. Preload A means none, and H marks high-accuracy manufacture.
With no preload the carriage rolls with the least drag, which suits a free-moving manual or lightly driven axis, and the long body spreads the load over more balls for a steadier bearing span. One planning note on maintenance: the 100 km re-grease interval is shorter than it sounds - a 200 mm stroke cycling once a second covers that distance in roughly three weeks of continuous running, so on a fast axis the distance binds before the 3-to-6-month calendar does. Ball retention holds the balls during handling, though angling the carriage onto the rail or swapping it hastily can still drop balls; a dummy rail helps. The balls themselves are Japanese ISO 3290 G10 grade behind a double-lip seal and an outer cover, and ambient temperature must stay within 80 C (transient peaks 100 C). Load and moment ratings are not published for LRM; we confirm the figure for this exact model on request.
Airtac LRM Miniature Linear Guide LRM12L1X340S7.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X340S7.5AH |
|---|---|
| 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 | 340 mm |
| 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 LRM12L1X340S7.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X340 | 1 carriage on a 340 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, 340 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 LRM12L1X340S7.5AH Is Used
Automated pipetting head
A 340 mm top-mount rail drives the x-axis of a small laboratory pipetting head; with preload A the motion friction stays low, so the syringe pumps move the carriage instead of fighting it.
LCD edge inspection scan
On a flat-panel inspection rig the carriage sweeps along the panel edge over a 340 mm run, the high H accuracy holding the camera line steady end to end.
Micro adhesive dispensing
A bench-top dispenser placing adhesive dots on electronics uses the long carriage as a steadier platform for the nozzle across the dot pattern.
Is the Airtac LRM Miniature Linear Guide LRM12L1X340S7.5AH the Right Guide?
Size both ways before you commit. When the load is heavy or overhung, move up to AirTAC LSH - it publishes per-carriage dynamic, static and moment ratings that turn sizing into arithmetic rather than a conversation, which LRM cannot offer. When the travel is short and you need crossed-roller rigidity, LGC is the closer fit. For this set, work through: complete set form, 12 mm rail width, long carriage, one carriage, 340 mm rail with a 7.5 mm end-hole offset, no preload (A - the smoothest running, but expect a little free play), high H accuracy, top-mount fixing, and finally a load rating confirmed with us, since LRM has no published figures to check.
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 LRM12L1X340S7.5AH FAQ
Rail width 12 mm, rail length 340 mm, one long carriage, no preload (A), high accuracy (H), top-mount rail, first holes 7.5 mm from the ends. Torque M3 screws to 196 N.cm in steel, 127 N.cm in cast iron and 98 N.cm in aluminium; M2 screws take 58.8, 39.2 and 29.4 N.cm. Keep ambient temperature at or below 80 C (transient peaks 100 C) and re-grease every 100 km of travel or every 3 to 6 months, whichever comes first. AirTAC publishes no load or moment rating for LRM, so we confirm the figures for this model before you order.
When the application carries a real load or a cantilevered overhang. LSH publishes basic dynamic load, static load and moment ratings for each carriage, so you can size the guide against your numbers directly. LRM deliberately targets miniature, light-duty positioning and publishes no such table - its case rests on compact size, precision and smooth running. If your numbers are modest and space is tight, this 12 mm, 340 mm set fits; if not, send us the figures and we will check the LSH table for you.
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 LRM12L1X340S7.5AH
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.