Airtac LRM Miniature Linear Guide LRM12L2X320S10BP
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X320S10BP 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 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 LRM12L2X320S10BP
This code describes a precision-grade complete set: a 12 mm stainless-steel rail cut to 320 mm with two long recirculating-ball carriages riding it, preloaded to the light B grade and manufactured to accuracy class P. Everything needed for mounting travels together under one part number - rail plus both carriages, nothing extra to order.
Accuracy P is the tighter of the two LRM grades, which is why this configuration suits measuring and inspection work where repeatable straight-line travel matters more than brute capacity. Light preload keeps running effort low; the trade-off is less rigidity than the C grade would give, and with only two rail widths in the range it is rail length and carriage count that drive the price, not width. The carriage holds its balls with a retention design so they stay put during handling, though the maker warns that inserting a carriage at an angle or swapping it hastily can still drop balls - work carefully or use a dummy rail. The balls themselves are Japanese-made to ISO 3290 G10, seated behind a double-lip seal under an outer cover. Keep ambient temperature at or below 80 C. Because LRM publishes no load or moment ratings, we confirm the capacity of this exact set against your application via the RFQ.
Airtac LRM Miniature Linear Guide LRM12L2X320S10BP Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X320S10BP |
|---|---|
| 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 | 320 mm |
| 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 LRM12L2X320S10BP
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long 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 LRM12L2X320S10BP Is Used
Microplate imaging stage
A laboratory auto-inspector sweeping a microplate under a camera: accuracy P gives repeatable straight travel, and light preload lets a small stepper drive it.
Laser-alignment optical bench
Carrying a beam-expander along a 320 mm rail in an optical test rig, where the P-grade travel accuracy is worth more than raw capacity.
Small gauge and calibration fixture
A bench stand that carries a dial or laser sensor past a reference part - a dual-carriage, precision-grade rail keeps the probe path repeatable run after run.
Is the Airtac LRM Miniature Linear Guide LRM12L2X320S10BP the Right Guide?
Deciding between LRM, LSH and LGC is the first step. LSH suits heavier or cantilevered loads because its catalogue lists dynamic, static and moment ratings per carriage - figures LRM simply does not publish. LGC answers short-travel applications that need crossed-roller stiffness. If LRM fits the brief, run through this list: carriage-only or complete set (this is a set), rail width 12 mm, long carriages, a pair of them, 320 mm of rail, light preload B with the installation-versus-rigidity trade-off in mind, precision accuracy P, top-mount rail, and a conversation with us to pin down the load rating for this exact model.
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 LRM12L2X320S10BP FAQ
Rail width 12 mm, rail length 320 mm, two long carriages, preload grade B, accuracy P, top-mount rail. Tighten M2 screws to 58.8 N.cm in steel (39.2 in cast iron, 29.4 in aluminium) and M3 screws to 196, 127 and 98 N.cm respectively. Keep ambient at or under 80 C with brief peaks to 100 C, and re-grease after each 100 km of travel or every 3 to 6 months. Note that no load or moment rating is published for the LRM series - send the RFQ and we confirm the figures for this exact set.
The complete set: one 320 mm stainless-steel rail with both long carriages mounted on it. There is no separate rail to buy and no pairing code to worry about - that code only appears on carriage-only orders, of which only a handful exist in our range. If you ever need a replacement carriage for this rail, it would normally be a special order matched to your rail's pairing letter.
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 LRM12L2X320S10BP
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.