Airtac LRM Miniature Linear Guide LRM12N2X320S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X320S10BHT 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
- AccuracyH — high 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 LRM12N2X320S10BHT
LRM12N2X320S10BHT is a 12 mm wide stainless rail, 320 mm long with the mounting holes set 10 mm in from the ends, fitted with two standard-length carriages and specified with light preload and high accuracy. The trailing T changes how it bolts down: the rail is clamped from underneath, which suits a machine bed where the upper face is the working surface and screw heads would be in the way.
With two carriages sharing one rail, set the datum face on the same side for both mounting positions - the catalogue notes this improves running accuracy on multi-carriage installations, and mounting surfaces should be ground or finish-milled. The light preload adds a touch of running stiffness over the unloaded A grade without demanding perfect surface finish. Ball circulation runs on Japanese ISO 3290 G10 balls (the grade describes the balls alone), held by a retention design that guards against dropped balls during handling - though angled or hurried fitting can still shed one, so a dummy rail helps during swaps, and the carriage should not be dismantled or separated from the rail unnecessarily. Temperature ceiling: 80 C ambient, 100 C momentary. LRM load ratings are not published; we confirm them per model via the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X320S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X320S10BHT |
|---|---|
| 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 | H — high 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 LRM12N2X320S10BHT
| 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. |
| H | H — high 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 LRM12N2X320S10BHT Is Used
Fibre array aligner
A fibre-array positioning slide on a photonics bench uses the H accuracy grade for repeatable core-to-core alignment passes under a microscope.
Flat-cable bonding fixture
A fixture holding ribbon cable terminations slides beneath a bonding head; bottom-mounting keeps the fixture plate's top surface free of fasteners.
Small-parts gate slide
A sorting gate above a conveyor chute rides the rail, sliding between two positions as parts pass a photoelectric sensor.
Is the Airtac LRM Miniature Linear Guide LRM12N2X320S10BHT the Right Guide?
Choose LSH over LRM whenever the payload is heavy or cantilevered: LSH lists dynamic, static and moment ratings per carriage, giving you numbers to design against, while LRM capacity is confirmed model by model with us. For short strokes where crossed-roller rigidity matters more than stroke length, look at LGC. This set checks out as: complete guide with rail, 12 mm width, standard-length blocks, two on one 320 mm rail, light preload (B), high accuracy (H), bottom-mount. The 80 C ambient limit is worth checking early if the axis sits beside a heater, an oven door or a laser head. Confirm the load rating with us before finalising the design.
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 LRM12N2X320S10BHT FAQ
Rail width 12 mm; rail length 320 mm; two standard-length carriages; 10 mm end-hole offset; light preload (B); high accuracy (H); bottom-mount rail. Torque: M3 screws 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium; M2 screws 58.8 / 39.2 / 29.4 N.cm. Ambient temperature must not exceed 80 C (peaks to 100 C). Re-grease every 100 km of travel or every 3 to 6 months - at a 200 mm stroke cycling once per second, 100 km arrives in roughly three weeks of continuous running, so the distance binds before the calendar does. Load and moment ratings are not published for LRM; we confirm them per model.
LSH is the larger guide family and its catalogue publishes dynamic, static and moment ratings for each carriage, so you can size a heavy or cantilevered load on paper. LRM, including this 12 mm bottom-mount set, carries no published ratings - the manufacturer leaves capacity to be confirmed per model, which we do before an order. If your envelope is small and the duty is light, LRM wins on size and smoothness; if the numbers must be proven first, start with LSH.
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 LRM12N2X320S10BHT
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.