Airtac LRM Miniature Linear Guide LRM12N3X190S7.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N3X190S7.5AH 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
- Carriages3
- Rail length190 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 LRM12N3X190S7.5AH
This LRM12N3X190S7.5AH is a compact complete guide: a 12 mm wide stainless-steel rail only 190 mm long, carrying three standard-length recirculating-ball carriages, fixed from the top, with high (H) accuracy and no preload. Three carriages on so short a rail give you three independent fixing positions along the span without splitting the layout across multiple rails.
The series runs on a common-rail profile, so carriages from across the LRM range share this rail geometry. Inside each carriage, the balls are Japanese-made to ISO 3290 G10 grade; a double-lip seal scrapes lubricant back and keeps dust out, while the outer cover hides the screws and shields the seal strip from swarf and larger debris. Ambient temperature must stay at or below 80 C, peaking no higher than 100 C. With three or more carriages on one rail, AirTAC advises placing the datum face on the same side for every carriage, which measurably improves running accuracy. A short rail like this sits at the low end of the stocked price spread, because rail length - not rail width - is what drives the price of LRM sets. Load and moment ratings are not published for the series; we confirm them per model via RFQ.
Airtac LRM Miniature Linear Guide LRM12N3X190S7.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N3X190S7.5AH |
|---|---|
| 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 | Standard carriage |
| Carriages supplied | 3 |
| Rail length | 190 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 LRM12N3X190S7.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 3X190 | 3 carriages on a 190 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, 190 mm |
| Carriage | Yes, 3 |
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 LRM12N3X190S7.5AH Is Used
Multi-head pick-and-place slider
A compact SMT pick-and-place head that lifts several small components per pass can mount each suction beam section over its own carriage, spreading the fixings across three points on one short rail.
Adjustable stop on bench jigs
A workshop jig needing an adjustable stop or guide block sliding along a 190 mm axis can fix through three carriages, giving the fitter several clamping positions on a single rail.
Sensor traverse on a test rig
An automated test bench scanning a probe across a small electronic assembly can carry the sensor on this three-carriage set, supporting the probe at more than one point over the short stroke.
Is the Airtac LRM Miniature Linear Guide LRM12N3X190S7.5AH the Right Guide?
Choose AirTAC LSH instead when the load is heavy or overhung: LSH carries published per-carriage dynamic, static and moment ratings you can design against, where LRM offers none. For short-travel work needing crossed-roller rigidity, compare LGC as well. Before you buy, tick through the checklist: complete-set form, 12 mm rail width, standard carriage length, three carriages, 190 mm rail, preload A (the least rigid grade but the smoothest and the most forgiving of mounting error), accuracy H, top-mount fixing and the 7.5 mm end-hole offset. Confirm the load rating with us for this exact model as the final step 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 LRM12N3X190S7.5AH FAQ
Rail width 12 mm, rail length 190 mm, three standard carriages, preload A (none), accuracy H (high), top-mount rail, 7.5 mm end-hole offset. Mount the rail on a ground or finish-milled surface to achieve the rated travel accuracy, and torque M2 screws to 58.8 N.cm in steel, 39.2 N.cm in cast iron, 29.4 N.cm in aluminium (M3: 196 / 127 / 98 N.cm). Ambient temperature must not exceed 80 C with peaks to 100 C, and re-greasing falls due every 100 km of travel or every 3 to 6 months. AirTAC publishes no dynamic, static or moment load ratings for LRM - we confirm them for this model on request.
LRM wins where the envelope is tight and the duty is light: a 12 mm rail, 190 mm long, with three carriages makes a compact, smooth precision axis. LSH is the larger series and its catalogue carries per-carriage dynamic, static and moment ratings, so if your load is substantial or cantilevered it is the series you can actually calculate with. If the travel is short and you need crossed-roller stiffness, look at LGC too. Either way, confirm the load rating with us before ordering - for LRM we do it model by model.
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 LRM12N3X190S7.5AH
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.