
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X470S10BPT is a miniature linear guide on a 12 mm stainless-steel rail with recirculating-ball carriage. 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.
The trailing T in LRM12L1X470S10BPT changes how the rail is fixed: bottom-mount, with screws passing up through the rail into your base plate, so no heads sit proud on the top face. The rest of the code reads as a complete set - 12 mm wide stainless rail, 470 mm long, one long carriage, light preload B and precision grade P accuracy.
Bottom-mount earns its place in slim frames and covered assemblies, where a top-fixing rail would foul a guard, a cable run or a mating surface; it also suits a base machined with a recess, since the rail seats into the pocket and clamps from below. Inside the carriage are the LRM essentials: retained Japanese-made ISO 3290 G10 balls (the grade covers the balls alone), a double-lip seal, an outer cover strip, all on a rail profile shared across the series. Ambient limit is 80 C. Two handling cautions matter on a long rail like this: never strike or drop the rail during fitting, because accuracy can be lost with no visible damage, and remember the ball retainer only helps - offering the carriage on at an angle or rushing a swap can still drop balls, so a dummy rail makes fitting easier. Load and moment ratings are not published for LRM; send the RFQ and we confirm them for this model.
| Model | Airtac LRM Miniature Linear Guide LRM12L1X470S10BPT |
|---|---|
| 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 | 1 |
| Rail length | 470 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.
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X470 | 1 carriage on a 470 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. |
| This order | Complete guide set |
|---|---|
| Rail | Yes, 470 mm |
| Carriage | Yes, 1 |
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.
A light print-head carriage on a slim desktop machine, where bottom-mount fixing keeps the rail face flush beneath the gantry plate.
A sample-tray drawer in a benchtop blood analyzer, running light loads inside a closed housing with no screw heads exposed.
A small labeling or coding head traversing pouches on a packaging line at light load and modest pace.
Checklist first: complete-set form, 12 mm rail width, long carriage, one block on a 470 mm rail, preload B with its installation trade-off, accuracy P, bottom-mount direction. Size the guide upward if the load is heavy or overhung - LSH publishes per-carriage dynamic, static and moment ratings you can calculate against, which LRM does not, so no LRM number should ever be assumed. If travel is short and crossed-roller rigidity is what the mechanism needs, LGC is the alternative worth comparing. Both fixing directions exist within the same 12 mm listing, so a top-mount counterpart can be matched if the layout changes.
Quick checklist
Rail width 12 mm, rail length 470 mm, one long carriage, light preload B, precision accuracy P, bottom-mount fixing, mounting holes offset 10 mm from each rail end. Screw torque: M3 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium; M2 58.8 / 39.2 / 29.4 N.cm. Ambient ceiling 80 C with brief peaks to 100 C; re-grease every 100 km of travel or every 3 to 6 months. The one figure absent from the catalogue is the load and moment rating - LRM publishes none, and we confirm it per model on enquiry.
Use this 12 mm LRM set when the envelope is small and the load is light. Step up to LSH when the load is significant or cantilevered, because LSH lists dynamic, static and moment ratings per carriage that support real calculation, while LRM publishes no ratings at all and any figure must be confirmed with us. For short strokes where crossed-roller rigidity matters, compare LGC too.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
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.