Airtac LRM Miniature Linear Guide LRM12N2X420S10APT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X420S10APT 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
- AccuracyP — precision 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 LRM12N2X420S10APT
LRM12N2X420S10APT is a complete miniature linear guide set from AirTAC: one 12 mm wide stainless-steel rail, 420 mm long, with two standard-length recirculating-ball carriages riding on it. The trailing T in the code puts the rail mounting holes on the underside, so fixing screws are driven from below the mounting surface rather than along the top - handy when the upper face has to stay clear or flush. Carriages ship pre-filled with grease and ready to run.
This version is precision grade (P) with preload A, meaning no built-in interference, so the carriages run with the freest rolling this series offers while still holding precision-grade travel tolerance. Inside each carriage the balls are Japanese-made ISO 3290 grade G10 balls, held by the ball-retention design, and a double-lip seal plus an outer cover work together against dust and grease wash-out. The common-rail profile means other LRM12 carriage variants can share this same rail later. Ambient temperature must stay at or below 80 C, with brief peaks to 100 C. Basic dynamic, static and moment ratings are not published for the LRM series; we confirm the figures for your exact model when you send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X420S10APT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X420S10APT |
|---|---|
| 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 | P — precision 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 LRM12N2X420S10APT
| 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. |
| A | A — no preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| P | P — precision 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 LRM12N2X420S10APT Is Used
Wafer inspection stage
Positioning sample holders under a semiconductor inspection microscope: the P grade supports repeatable stops, and bottom mounting keeps the top surface clear for fixtures and services.
Machine-vision camera slide
A 420 mm rail carries a compact camera across a parts tray in an automated optical inspection cell; the two-carriage layout steadies the camera against tipping along the travel.
PCB assembly press slide
Guiding a small connector-pressing head down onto a printed circuit board, where the free-rolling, unloaded carriages keep breakaway force low on a delicate station.
Is the Airtac LRM Miniature Linear Guide LRM12N2X420S10APT the Right Guide?
Because LRM carries no published load table, size the application the other way round: define the travel, envelope and accuracy first, then let us confirm the ratings for this exact configuration. If your load is substantial or hangs on a cantilever, step up to the LSH series, which publishes per-carriage dynamic, static and moment ratings you can check against a calculation. If the travel is short and the priority is crossed-roller rigidity, LGC is the closer match. Before ordering, work through this checklist: set versus carriage-only form, 12 mm rail width, standard carriage length, two carriages, 420 mm rail, preload A, accuracy P, bottom-mount direction, and a confirmed load rating from us.
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 LRM12N2X420S10APT FAQ
Rail width 12 mm, rail length 420 mm, two standard-length carriages, end-hole offset 10 mm, preload A (none), accuracy grade P (precision), bottom-mount rail, stainless-steel rail, plain finish. Mounting screw torques: M2 screws take 58.8 N.cm in steel, 39.2 N.cm in cast iron and 29.4 N.cm in aluminium; M3 screws take 196 N.cm in steel, 127 N.cm in cast iron and 98 N.cm in aluminium. Ambient temperature must not exceed 80 C, with transient peaks to 100 C. Re-grease every 100 km of travel or every 3 to 6 months. Basic dynamic load, static load and moment ratings are not published for LRM; we confirm them for this exact model on request.
Choose LRM when the priority is a tight envelope, smooth low-friction running and precision-grade travel on a light-duty axis, like this 12 mm, 420 mm bottom-mount set. Choose LSH when the load is heavier or overhung: LSH publishes basic dynamic, static and moment ratings per carriage that you can plug into a sizing calculation, which LRM does not. If travel is short and you need crossed-roller rigidity, LGC is the third option. Send us the load case and we will confirm whether this LRM12 configuration is suitable before you order.
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 LRM12N2X420S10APT
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.