Airtac LRM Miniature Linear Guide LRM12N2X420S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X420S10BPT 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
- PreloadB — light 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 LRM12N2X420S10BPT
The LRM12N2X420S10BPT is a complete miniature linear guide set: one 420 mm stainless-steel rail, 12 mm wide, with two standard-length recirculating-ball carriages already running on it. The trailing T in the code means the rail is drilled for bottom mounting - fixing screws pass up through the support surface, so the top of the rail stays clear for the carriage stroke and no fastener heads cross the working deck. Rail and both carriages ship together as one axis.
Accuracy here is the precision P grade, and preload is the light B grade, which keeps sliding resistance low for an easy-moving stage. The recirculating balls are ISO 3290 G10 grade, Japanese made, and the ball-retention design holds them in the carriage during handling - though the manufacturer is clear that angled insertion or a hasty swap can still drop balls, so work carefully or use a dummy rail. A double-lip seal scrapes oil and excludes dust while the outer cover shields the seal strip from larger debris. Ambient temperature must stay at or below 80 C, with transient peaks to 100 C. Where a load figure would normally sit, note that AirTAC publishes no dynamic, static or moment ratings for LRM; we confirm them for this exact model when you send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X420S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X420S10BPT |
|---|---|
| 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 | B — light 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 LRM12N2X420S10BPT
| 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. |
| B | B — light 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 LRM12N2X420S10BPT Is Used
Microscope camera slide
Traversing a camera or illumination head across a benchtop inspection microscope stage, where the precision P grade keeps the line of travel true.
Laser optics alignment
Carrying a mirror or focusing-lens carriage on a benchtop laser marking rig, with bottom fixing keeping the optical deck free of fastener heads.
PCB probe fixture
Guiding a probe carriage across a printed-circuit-board electrical test fixture, where light preload B keeps the actuation force small.
Is the Airtac LRM Miniature Linear Guide LRM12N2X420S10BPT the Right Guide?
If the job involves substantial or cantilevered loads, step up to the LSH series instead: LSH publishes per-carriage dynamic, static and moment ratings you can size against, which LRM does not. For short travel where crossed-roller rigidity matters more than stroke, compare the LGC series. Matching this set: form is a complete set, rail width 12 mm, standard carriage, two carriages on one 420 mm rail, light B preload (easy motion, slightly less stiff than C), precision P accuracy, bottom-mount rail. One budgeting note: across stocked LRM sets the roughly $66 to $831 span is driven by rail length and carriage count, not width, so trimming travel saves more than changing size. Before committing, confirm the load and moment ratings with us for this specific model - we will supply the figures from the datasheet.
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 LRM12N2X420S10BPT FAQ
Rail width 12 mm; rail length 420 mm with a 10 mm end-hole offset; two standard-length carriages; light preload (B); precision accuracy (P); bottom-mount rail, shown by the trailing T in the code. Fixing-screw torque: M2 screws 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 screws 196, 127 and 98 N.cm respectively. Carriages arrive pre-filled with Kyodo Yushi PS No. 2 grease; re-grease every 100 km of travel or every 3 to 6 months. Ambient temperature limit is 80 C, with transient peaks to 100 C. AirTAC publishes no load or moment ratings for LRM, so we confirm those for this model on request.
You receive the complete set: one 420 mm stainless rail with two standard carriages fitted and ready to bolt down from below. There is no separate carriage-only pairing code to worry about here - pairing letters belong to codes like LRM12BK-... that contain no rail. Fixings are chosen to suit your base material and torqued per the values above. Carriage-only replacements are a different code shape, and we stock only a handful of those SKUs, so most replacement carriages are a special order - if you plan field swaps, ask us about a dummy rail for safe fitting.
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 LRM12N2X420S10BPT
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.