
The AirTAC Airtac LRM Miniature Linear Guide LRM15L1X270S15APT is a miniature linear guide on a 15 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.
This is the bottom-mount precision variant of the 15 mm LRM family: a 270 mm stainless-steel rail with one long recirculating-ball carriage, supplied as a complete set. The T in the code directs the fixing screws up through the base, which suits frames where the top of the rail must stay clear or where fastener heads would sit in the product path. Accuracy grade is P, the tighter of the two grades offered.
Handle the carriage with care during installation. The ball-retention design holds the balls in place during normal handling, but tilting the carriage onto the rail or snapping it on quickly can still drop balls - a dummy rail makes fitting easier. The recirculating balls are Japanese ISO 3290 G10 grade, the seal is a double-lip design, and an outer cover keeps grit away from the seal strip. Keep the environment at 80 C or below, with peaks no higher than 100 C. Load and moment ratings are not published for the series, so ask us and we will confirm the numbers for this configuration before you order.
| Model | Airtac LRM Miniature Linear Guide LRM15L1X270S15APT |
|---|---|
| Series | LRM Series Miniature Linear Guide |
| Supplied as | Complete guide set |
| Construction | Recirculating ball, stainless-steel rail, common-rail design |
| Size code | LRM15 |
| Rail width | 15 mm |
| Carriage length | Long carriage |
| Carriages supplied | 1 |
| Rail length | 270 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 | A — no 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. |
|---|---|
| 15 | Size code. |
| L | Long carriage. |
| 1X270 | 1 carriage on a 270 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| A | A — no 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, 270 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.
Inside a compact dispensing unit, the bottom-mounted rail keeps fastener heads out of the dispense zone while the long carriage carries the needle holder steadily.
A shuttle sorting small components between two chutes relies on smooth, repeatable travel; precision grade P holds the stop positions consistent run after run.
Moving sample vials inside a benchtop analyser, the underside-fixed rail leaves the product plane unobstructed and the grade P accuracy keeps vials aligned with the optics.
Match the code to your drawing line by line: set form, 15 mm rail width, long carriage, one carriage, 270 mm rail, no preload, precision grade P, bottom-mount direction. If a spare carriage will ever be needed, note the pairing letter on the original - rails and carriages must share it - and expect a special order, since carriage-only stock is thin. When the duty load is significant or hangs off the carriage, LSH is the better series: it publishes per-carriage dynamic, static and moment ratings, none of which LRM offers. LGC suits short, stiff, crossed-roller travel instead. Send us the load, moment and stroke by RFQ and we will confirm suitability for this exact set.
Quick checklist
It is a set with a 15 mm wide, 270 mm long stainless rail and one long carriage in precision accuracy (grade P), no preload (grade A), fixed from below via bottom-mount holes. M2 rail screws torque to 58.8 N.cm in steel, 39.2 in cast iron, 29.4 in aluminium; M3 screws take 196, 127 and 98 N.cm. Re-grease every 100 km of travel or every 3 to 6 months and keep the ambient at or under 80 C, peaking at 100 C. The LRM series publishes no load or moment ratings - we confirm them for this specific model through the RFQ.
If your application loads the carriage heavily or carries a cantilever, move up to LSH, which publishes dynamic, static and moment ratings per carriage so you can do the sizing arithmetic. LRM publishes none of these figures, which is why we confirm them per model before you order. When travel is short and stiffness is the priority, LGC's crossed-roller construction is the better match. Send the RFQ with your load, moment and envelope and we will route you to the right series.
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.