Airtac LRM Miniature Linear Guide LRM12N2X420S10CHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X420S10CHT 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 length420 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 LRM12N2X420S10CHT
LRM12N2X420S10CHT is a complete 12 mm miniature guide: a 420 mm stainless rail with two standard carriages, drilled so the rail bolts on from underneath. That trailing T changes only the fixing direction - geometry, preload C and accuracy H are otherwise the same as the top-mount version - but it decides where the part can live. If the top face of your baseplate is the working surface, or the rail sits inside an enclosure where screws cannot be reached from above, bottom mounting is the answer.
Medium preload C minimises play along the travel; the trade is a touch more sliding drag than the light B grade. The recirculating balls are Japanese-made ISO 3290 G10 grade, and the ball-retention design keeps them in the carriage while you handle it - still, the manufacturer cautions that tilting the carriage onto the rail or swapping it quickly can drop balls, and a dummy rail is the safe way to do field swaps. The double-lip seal and outer cover work together against grease washout and debris, and re-greasing every 100 km binds by distance before the calendar: a 200 mm stroke cycling once per second covers that in roughly three weeks of continuous running. Ambient temperature must not exceed 80 C, peaks to 100 C. Because AirTAC publishes no load or moment ratings for LRM, ask us and we confirm the figures for this exact configuration.
Airtac LRM Miniature Linear Guide LRM12N2X420S10CHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X420S10CHT |
|---|---|
| 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 | 420 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 | 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 LRM12N2X420S10CHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X420 | 2 carriages on a 420 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, 420 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 LRM12N2X420S10CHT Is Used
Gauge fixture probe slide
Mounting under a ground baseplate in a shop-floor gauge fixture, letting the probe carriage run on a deck with no screw heads on top.
Wire-feeder carriage
Guiding a wire-feeder carriage on a compact winding machine, where the enclosed frame makes underside fixing the only practical route.
Film web guide slide
Positioning a small guide roller for film web alignment on a compact slitter, inside a guarded frame with no top access to the screws.
Is the Airtac LRM Miniature Linear Guide LRM12N2X420S10CHT the Right Guide?
Sizing rule of thumb: if the load is substantial or hangs off a cantilever, the LSH series is the better tool because its catalogue lists per-carriage dynamic, static and moment ratings to calculate with - LRM publishes none. For very short travel where crossed-roller rigidity is the priority, LGC is the cross-series alternative. Checklist for this set: complete set (rail included), 12 mm rail width, standard carriage, two carriages, 420 mm rail length, medium C preload - stiffer but higher in drag than B, high H accuracy, bottom-mount fixing. Confirm the load rating with us for this specific model before you commit; we will return the datasheet figures.
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 LRM12N2X420S10CHT FAQ
12 mm rail width; 420 mm rail length; 10 mm end-hole offset; two standard-length carriages; preload grade C (medium); accuracy grade H (high); bottom-mount rail. Screws: M2 at 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 at 196, 127 and 98 N.cm. Carriages ship greased with Kyodo Yushi PS No. 2; re-grease after every 100 km of travel or every 3 to 6 months, whichever comes first. Ambient temperature: 80 C maximum, 100 C transient peaks. Load and moment ratings are not published for the LRM series - we confirm them for this model on request.
Yes - this is a complete set with the 420 mm rail and both standard carriages supplied together. Carriage-only parts carry a different code shape (LRM12BK-... with a pairing letter that must match the rail the carriage will serve), contain no rail, and we hold very few of them, so plan replacements as special orders. If you ever need to replace one carriage on this rail, contact us with the pairing code taken from the original part. Do not dismantle the carriage to salvage it - that risks lost balls, raceway damage and lost accuracy.
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 LRM12N2X420S10CHT
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.