Airtac LRM Miniature Linear Guide LRM12N2X320S10CH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X320S10CH 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
- PreloadC — medium 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 LRM12N2X320S10CH
Order the LRM12N2X320S10CH and you receive a complete miniature guide assembly: a 12 mm wide stainless rail cut to 320 mm with two standard carriages riding it, medium preload applied at the factory and high-grade accuracy. There is no trailing T in this code, so mounting is from the top - the simplest arrangement when the screw line is reachable from above - and the 10 mm end-hole offset gives the fixing pattern as catalogued.
Medium preload is the rigid choice: it removes most of the internal play, so the carriage holds position better under reversing loads, at the price of slightly higher running drag and less tolerance of imperfect mounting surfaces - grind or finish-mill the seat to get the rated travel accuracy. Inside run Japanese-made balls to ISO 3290 G10 for roundness and wear, with a double-lip seal managing oil scraping and dust exclusion under an outer cover that also conceals the screws. Because the rail uses the LRM common profile, another LRM12 carriage can be run on it later. The manufacturer caps ambient temperature at 80 C, with peaks no higher than 100 C. No dynamic or static load figure appears in the LRM data; we will confirm the rating for this exact model when you send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X320S10CH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X320S10CH |
|---|---|
| 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 |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | H — high grade |
| Preload grade | C — medium 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 LRM12N2X320S10CH
| 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. |
| C | C — medium 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 LRM12N2X320S10CH Is Used
Micro-dispensing gantry on a PCB potting line
A potting cell moves a syringe nozzle between pads on small circuit boards; preload C holds the nozzle height steady as the axis reverses at each pad, and the double-lip seal keeps resin dust out of the raceways.
PCB solder-joint camera rail
An AOI camera slides down a populated board on this 320 mm axis; top-mount fixing means the rail bolts straight onto the machine deck, and the 12 mm width keeps the camera low over the panel.
Escapement slide for brass insert feeding
A feeder escapement indexes small brass inserts one at a time, and two preloaded carriages stop the slide nodding at each reversal. It runs from the box on its Kyodo Yushi PS No. 2 charge, and since a 200 mm stroke cycling once a second covers 100 km in roughly three weeks, the distance interval - not the calendar - will call for re-greasing first.
Is the Airtac LRM Miniature Linear Guide LRM12N2X320S10CH the Right Guide?
Two carriages on one rail widen the bearing span, which is what resists tipping along the direction of travel; add medium preload and you have a short, stable axis for a head that reverses often. When the load is heavy, overhung or moment-dominated, move up to LSH - its catalogue lists per-carriage dynamic, static and moment ratings you can do arithmetic with, something LRM never publishes. If the stroke is short and the goal is crossed-roller stiffness, put LGC beside it on the comparison sheet. Run this checklist before you buy: complete set (rail plus two carriages), 12 mm rail width, standard carriage length, two blocks, 320 mm rail, preload C (stiffer and better at holding position, but higher drag and less forgiving of seat errors), accuracy H, top-mount fixing, the matching pairing code should you ever need a lone spare carriage, and a load rating we confirm with you per 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 LRM12N2X320S10CH FAQ
Decide by load, not by width. LRM wins on envelope: a 12 mm rail, 320 mm long, with two standard carriages, preload C and high accuracy in the smallest practical footprint, working below an 80 C ambient. But LRM publishes no dynamic, static or moment rating at all - we confirm each figure per model. If your sizing depends on published numbers, or the load is cantilevered, LSH lists per-carriage dynamic, static and moment ratings you can design against. Send us the sketch and we will tell you which series holds.
Rail width 12 mm; rail length 320 mm; two standard carriages at medium preload (C) with high accuracy (H); top-mount fixing. Fix with M3 screws at 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium, on a seat that is ground or finish-milled so the rated travel accuracy is achieved. Ambient limit is 80 C with transient peaks to 100 C. Grease is Kyodo Yushi PS No. 2 from the factory; top up every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM - request them from us per 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 LRM12N2X320S10CH
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.