Airtac LRM Miniature Linear Guide LRM12N2X300S12.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X300S12.5AH 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
- Carriages2
- Rail length300 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 LRM12N2X300S12.5AH
This LRM12N2X300S12.5AH is a complete miniature linear guide set: a 12 mm wide stainless-steel rail, 300 mm long, carrying two standard-length recirculating-ball carriages. The S12.5 segment sets the end-hole offset at 12.5 mm, so the fixing-hole spacing differs from the more common 10 mm pattern - check it against your base plate drilling before ordering. The set arrives assembled, with rail, both carriages, seals and end caps fitted.
Two carriages on one rail share the load and resist tipping along the direction of travel, which suits a compact stage where a second rail would not fit. The carriages run on ISO 3290 G10 Japanese balls - a grade that covers the balls only, not the assembly - held in place by a ball-retention design so they stay put during handling, behind a double-lip seal and an outer cover that hides the screws and shields the seal strip. Preload is grade A, meaning none: the free-running choice. Ambient temperature must stay at or below 80 C, with transient peaks no higher than 100 C. Load and moment ratings are not published for LRM, so we confirm the figures for this exact model when you send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X300S12.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X300S12.5AH |
|---|---|
| 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 | 2 |
| Rail length | 300 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 LRM12N2X300S12.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X300 | 2 carriages on a 300 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, 300 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 LRM12N2X300S12.5AH Is Used
Compact XY dispensing stage
Carries the glide axis of a small gluing or dispensing stage in electronics assembly, where the 300 mm travel covers a circuit board and the two-block layout keeps the bridge flat under a lightweight head.
Benchtop pick-and-place head
Guides a light pick-and-place head on a benchtop robot, with the twin carriages resisting the tipping moment as the head reaches out to the part.
Laser alignment slide
Positions a mirror or beam-splitter mount along a laser alignment axis in a laboratory, where the no-preload grade A carriage gives free, low-stiction adjustment by hand.
Is the Airtac LRM Miniature Linear Guide LRM12N2X300S12.5AH the Right Guide?
LRM is the small end of the linear-guide range, chosen for precision and smoothness in a tight envelope rather than raw capacity. If the load is substantial or hangs on a cantilever, step up to LSH, which publishes per-carriage dynamic, static and moment ratings you can size against - LRM states none of these. Where travel is short and crossed-roller rigidity matters more than stroke, LGC is the better match. Before committing, run the checklist: form (complete set), 12 mm rail width, standard carriage length, two carriages, 300 mm rail, the 12.5 mm hole offset, preload A, accuracy H, top-mount direction - and confirm the load rating with us first. One more angle: size 12 is by far the most widely supplied LRM size, so a design laid out around this rail width avoids the ordering friction of a 15 mm layout.
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 LRM12N2X300S12.5AH FAQ
It is a complete set: 12 mm rail width, 300 mm rail length, two standard-length carriages, preload A (none), accuracy H (high), top-mount rail, and a 12.5 mm end-hole offset. Mounting screws torque to 58.8 N.cm (M2) or 196 N.cm (M3) into steel, less into cast iron and aluminium. The ambient temperature limit is 80 C with transient peaks to 100 C, and the carriage should be re-greased every 100 km of travel or every 3 to 6 months, whichever comes first. Load and moment ratings are not published for LRM - we confirm them for this model when you enquire.
The 100 km interval is shorter than it sounds. A 200 mm stroke cycling once per second covers 100 km in roughly three weeks of continuous running, so on a busy machine the distance limit binds well before the 3-to-6-month calendar limit. The carriages ship pre-filled with Kyodo Yushi PS No. 2; top up through the lubrication hole at the rear by stroking the carriage and injecting from one side until an even film shows on the rail, and never mix lubricant types.
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 LRM12N2X300S12.5AH
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.