Airtac LRM Miniature Linear Guide LRM12L2X270S10CHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X270S10CHT 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 length270 mm
- AccuracyH — high grade
- PreloadC — medium 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 LRM12L2X270S10CHT
This LRM12L2X270S10CHT set pairs a 270 mm long, 12 mm wide stainless-steel rail with two long carriages, preloaded to grade C and finished to accuracy grade H. The trailing T in the code is the tell: this is the bottom-mount version, where the rail is threaded from underneath and bolted up into the machine structure from below.
Bottom-mounting changes how you build the machine. The screw heads sit inside the rail, concealed and clear of debris, and the mounting face is the surface above the rail rather than the bed beneath it - useful where you cannot reach down between guided components with a driver. The twin long carriages spread the contact over more balls and a longer span than standards, helping any overhung part ride steadily. Balls are Japanese ISO 3290 G10 grade - that grade describes the balls only, not the assembled guide - behind a double-lip seal and an outer cover. Keep ambient temperature at or below 80 C, peaks to 100 C. No load or moment rating is published for LRM; ask us through the RFQ and we will confirm the numbers for this model before ordering.
Airtac LRM Miniature Linear Guide LRM12L2X270S10CHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X270S10CHT |
|---|---|
| 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 | 270 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 | C — medium 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 LRM12L2X270S10CHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X270 | 2 carriages on a 270 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| C | C — medium 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, 270 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 LRM12L2X270S10CHT Is Used
Benchtop laser alignment slide
A diode-laser module fine-positioned over a workpiece: the rail bolts up into the underside of the optics plate, so no screw heads protrude into the beam path and the long twin carriages hold the module square.
Heated enclosure sample shuttle
Moving vials or coupons inside a warm chamber is a natural fit, provided the enclosure stays under the published 80 C ambient limit. Bottom-mount fixing keeps the sliding face flush with the chamber floor.
Under-slung camera gantry
A small vision camera riding beneath a frame bracket: the rail hangs from the bracket face, the twin long carriages resist the camera's pitching moment, and the concealed fixings keep cable routing clean.
Is the Airtac LRM Miniature Linear Guide LRM12L2X270S10CHT the Right Guide?
If your frame offers a machined face above the travel and no access from above, the bottom-mount T variant saves you redesigning the assembly. When the job involves real loads or a cantilever, move up to LSH, which publishes per-carriage dynamic, static and moment ratings you can actually calculate against - LRM publishes none. For short travel where crossed-roller stiffness matters more than stroke, look at LGC. Match on: set versus carriage, 12 mm rail width, long carriage, 2 carriages, 270 mm rail, preload C (rigid and less forgiving - your mounting surfaces must be ground or finish-milled, with the datum on the same side for both carriages), accuracy H, bottom mounting, and a load rating confirmed with us for this exact SKU. Note the price spread in stocked LRM sets - roughly $66 to $831 - is driven almost entirely by rail length, so trimming travel is the cheapest way to trim cost.
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 LRM12L2X270S10CHT FAQ
Only the mounting direction: the T code means the rail fixes from below, screw heads concealed, so the datum face sits above the rail. Everything else matches - 12 mm rail width, 270 mm length, 10 mm end offset, two long carriages, preload C, accuracy H. Carriages arrive pre-greased with Kyodo Yushi PS No. 2; re-grease every 100 km of travel or every 3 to 6 months. M3 screws torque to 196 N.cm into steel, 127 into cast iron, 98 into aluminium. Ambient temperature must not exceed 80 C, with peaks to 100 C. Load and moment ratings are not published for LRM - we confirm them per model, so send the RFQ before finalising your design.
Decide by load and leverage, not by size. LRM is the miniature, light-duty end of the range and is chosen for its 12 mm envelope, smooth running and grade H accuracy. LSH is a larger series whose catalogue publishes dynamic, static and moment ratings per carriage, so if your payload is heavy, offset or shock-loaded, size the axis against those published numbers instead of guessing. For very short travel needing crossed-roller rigidity, LGC is the third option. If you stay with LRM, we will confirm the load figures for this specific set with the manufacturer before you order - that is the only way a credible number reaches your drawing.
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 LRM12L2X270S10CHT
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.