Airtac LRM Miniature Linear Guide LRM12N2X320S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X320S10BPT 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
- 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 LRM12N2X320S10BPT
The LRM12N2X320S10BPT is a complete miniature linear guide: one 320 mm stainless-steel rail, 12 mm wide, carrying two standard-length recirculating-ball carriages, factory-fitted at light preload (code B) with precision accuracy (code P). The trailing T in the code sets the mounting direction - the rail bolts from underneath, so fixing screws are reached from the base face of the machine rather than over the top, which matters when the rail sits in a pocket or under an overhanging deck. The 10 mm end-hole offset is already machined into both rail ends.
Four design details do the quiet work. The common-rail profile means any other LRM12 carriage can run on this same rail; the ball-retention feature keeps the rolling elements captive during handling, though fitting a carriage at an angle or swapping it hurriedly can still spill balls - a dummy rail helps; the balls themselves are made in Japan to ISO 3290 G10 for roundness and wear; and a double-lip seal beneath an outer cover scrapes oil back, shuts out dust and hides the screw row. Ambient temperature must stay at or below 80 C, with short peaks to 100 C, so keep the axis clear of heater shrouds and hot laminates. AirTAC publishes no load or moment rating for LRM; we confirm the figures for this specific model before you commit - send the RFQ and we will come back with them.
Airtac LRM Miniature Linear Guide LRM12N2X320S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X320S10BPT |
|---|---|
| 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 (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 LRM12N2X320S10BPT
| 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. |
| 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, 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 LRM12N2X320S10BPT Is Used
Laser module inspection fixture
A metrology bench tests laser diodes one module at a time; the bottom-mounted rail is let into the baseplate so the top surface stays flat under the beam path, while the two P-grade carriages carry the detector saddle along a repeatable line.
SMT feeder verification slide
When calibrating component feeders on an electronics line, a light-preloaded miniature axis with two carriages gives the verification head smooth starts - no stick-slip to distort the repeat-position reading.
Prototype sensor carriage on a bench rig
A benchtop rig for cycling proximity sensors needs a slide that bolts into a milled channel from below; this bottom-mount set drops straight in, and topping the grease up through the rear hole of each carriage takes a minute.
Is the Airtac LRM Miniature Linear Guide LRM12N2X320S10BPT the Right Guide?
Lead with precision: this is a P-grade, lightly preloaded pair on a bottom-mounted rail, a combination that suits a measuring axis where free, low-friction travel and tight running tolerances matter more than brute stiffness. Size 12 is also the deep end of our stock - 924 of the 988 LRM sets we hold are this width - so lead times here are the best in the range. If the load is substantial or hangs on a cantilever, step up to LSH instead: it publishes per-carriage dynamic, static and moment ratings you can size against, which LRM does not. For short strokes where crossed-roller rigidity is the priority, compare LGC as well. Tick through before ordering: form (complete set, rail plus two carriages), 12 mm rail width, standard carriage length, two blocks, 320 mm rail, preload B (light - easy running, forgiving of minor misalignment, but it deflects more under overturning than grade C), accuracy P, bottom-mount fixing, the pairing code if you ever order a spare carriage on its own, and a load rating confirmed with us in writing.
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 LRM12N2X320S10BPT FAQ
Rail width 12 mm; rail length 320 mm; two standard-length carriages; light preload (B); precision accuracy (P); bottom-mount fixing with a 10 mm end-hole offset. Drive M3 screws to 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. Each carriage ships greased with Kyodo Yushi PS No. 2; re-grease through the rear hole every 100 km of travel or every 3 to 6 months, whichever comes first. Load and moment ratings are not published for LRM - we confirm them for this model on request.
One 320 mm stainless-steel rail and two standard carriages already fitted, preloaded and sealed - nothing else is needed to build the axis. There is no black-chrome option on this code, no separate rail and no bolt caps in the carton; black-chrome LRM parts and rail-only lengths exist to order but are not items we stock. One caution for the fitter: the ball-retention design helps but does not guarantee - angle the carriage onto the rail or swap it too quickly and balls can still drop.
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 LRM12N2X320S10BPT
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.