Airtac LRM Miniature Linear Guide LRM12L2X420S10CPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X420S10CPT 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 lengthLong carriage
- Carriages2
- Rail length420 mm
- AccuracyP — precision 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 LRM12L2X420S10CPT
The LRM12L2X420S10CPT is a complete miniature linear guide set: one 420 mm stainless-steel rail, 12 mm wide, carrying two long carriages that ride on recirculating steel balls. Both carriages arrive fitted on the rail and pre-filled with Kyodo Yushi PS No. 2 grease, and the rail is drilled for bottom-mount fixing with a 10 mm end-hole offset, so the fasteners stay out of sight beneath the guide.
Preload C is the stiffest of the three LRM grades - none, light, medium - and it is paired here with precision P accuracy for a build where any play would show in the result. The trade-off is extra running drag and less forgiveness in the seats: the mounting face should be ground or finish-milled. Japanese-made ISO 3290 G10 balls run in the raceways, a double-lip seal scrapes off dust, an outer cover shields the seal strip, and the ambient temperature must stay at or below 80 C with brief peaks to 100 C. Rail length, not width, is what moves the price across stocked LRM12 sets, so trimming the 420 mm to what the travel truly needs is the first way to cut cost. Load and moment ratings are not published for LRM; tell us the duty by RFQ and we will confirm the figures for this exact model before you order.
Airtac LRM Miniature Linear Guide LRM12L2X420S10CPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X420S10CPT |
|---|---|
| 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 | Long 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 | 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 LRM12L2X420S10CPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long 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. |
| 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 LRM12L2X420S10CPT Is Used
Wafer inspection stage
A bottom-mount 12 mm rail slots under a ground aluminium plate in a compact wafer inspection station, keeping the fastener heads clear of the optics above while two long carriages hold the stage level along 420 mm of travel.
Laser diode test slide
Precision P accuracy combined with a medium preload gives a small laser diode test bench a repeatable carriage position at the end of every cycle, with no visible play in the beam path.
PCB inspection camera gantry
An AOI camera riding two long blocks along a 420 mm rail sweeps a full circuit board in one pass, and the concealed underside fixing suits an enclosed machine frame where the top face must stay flush.
Is the Airtac LRM Miniature Linear Guide LRM12L2X420S10CPT the Right Guide?
Size upward to the LSH series when the load is substantial or cantilevered: LSH publishes per-carriage dynamic, static and moment ratings you can calculate against, while LRM publishes none, so every LRM capacity check has to run through us. Step across to LGC when travel is short and the job needs the crossed-roller rigidity it offers. Before committing, tick off this checklist: form (set or carriage only), rail width 12 mm, carriage length long, two carriages, rail length 420 mm, preload C with the note that stiffer preload demands better-finished seats, accuracy grade P, bottom-mount direction, and - only if you are replacing a single part - the matching pairing code. Close by confirming the load rating with us for this exact SKU.
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 LRM12L2X420S10CPT FAQ
The rail is 12 mm wide and 420 mm long with a 10 mm end-hole offset; it carries two long carriages with medium preload C, precision accuracy P and bottom-mount fixing. Drive M3 mounting screws to 196 N.cm in steel, 127 N.cm in cast iron and 98 N.cm in aluminium. Keep the ambient temperature at or below 80 C, with transient peaks no higher than 100 C, and re-grease every 100 km of travel or every 3 to 6 months. Basic dynamic, static and moment load ratings are not published for LRM; we confirm them for this specific model against your application.
Choose LRM when the envelope is tight and the duty is light, as here: a 12 mm rail with two long carriages on 420 mm. Choose LSH when the load is heavy or overhung, because LSH publishes per-carriage dynamic, static and moment ratings you can size against, which LRM does not. If in doubt, send the duty to us by RFQ and we will confirm which series and which exact model carries it.
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 LRM12L2X420S10CPT
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.