Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT 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.
- SeriesLRM
- Supplied asComplete guide set
- SizeLRM12
- Rail width12 mm
- Carriage lengthStandard carriage
- Carriages1
- Rail length345 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 LRM12N1X345S10BPT
LRM12N1X345S10BPT is the bottom-mount variant of the 12 mm precision set: a 345 mm stainless-steel rail, 12 mm wide, with one standard recirculating-ball carriage, light preload B and accuracy grade P. The trailing T in the code changes where the screws go - the rail is bolted from below, which suits a machine deck whose top face is the working surface and cannot be drilled through or reached from above.
Because the fasteners are inaccessible once assembled, get the installation right first time. Mounting surfaces should be ground or finish-milled for the rated travel accuracy; the catalogue lists the permissible surface figures per size (Q1 2 to 5 mm, Q2 1.2 to 3.2 mm, H1 1.5 to 3.5 mm, corner R max 0.2 to 0.5 mm across the range), so quote them as a set when preparing the drawing. Torque the M3 screws to 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium. The carriage carries ISO 3290 G10 Japanese balls - a ball-only grade - behind a double-lip seal under an outer cover, and ambient must not exceed 80 C with peaks to 100 C. LRM has no published load or moment rating; request the RFQ and we confirm the number for this exact configuration. Size 12 is our best-stocked LRM class, so bottom-mount precision sets like this one are readily available.
Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT |
|---|---|
| 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 | 1 |
| Rail length | 345 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.
Model Code: Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X345 | 1 carriage on a 345 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, 345 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.
Where the Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT Is Used
Underside-mounted XY deck
A compact XY deck whose top surface carries the workpiece and cannot take screw heads. Bottom-mounting from below keeps the working face clear while the precision P grade keeps deck travel true.
Production go/no-go gauge slide
A checking fixture sliding over machined parts on a line-side bench. The P grade supports consistent gauging along the 345 mm stroke, and the ball-retainer design makes occasional carriage service less fiddly - though careful handling is still required.
Parcel labelling head
A label applicator head travelling over boxes on a small e-commerce packing conveyor. Light-duty, high-cycle motion suits this set; plan re-greasing around the 100 km travel interval, which arrives quickly on a busy line.
Is the Airtac LRM Miniature Linear Guide LRM12N1X345S10BPT the Right Guide?
For a heavier or cantilevered load, change series rather than mounting direction: AirTAC LSH publishes dynamic, static and moment ratings per carriage, giving you real numbers to design against where LRM offers none. For a short stroke needing crossed-roller stiffness, look at LGC. If this bottom-mount set fits, work the checklist: complete set, 12 mm rail width, standard carriage length, 1 carriage, 345 mm rail, light preload B (easy to install, minimal internal clearance), precision accuracy P, bottom-mount rail, and a load rating confirmed with us before you commit 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 LRM12N1X345S10BPT FAQ
It is a complete set: 12 mm wide rail, 345 mm long, one standard carriage, light preload B, precision accuracy P, mounted from below (bottom-mount), with fixing holes offset 10 mm from each rail end. The carriage arrives greased with Kyodo Yushi PS No. 2; re-grease through the rear port every 100 km of travel or every 3 to 6 months, whichever comes first. Keep ambient at or below 80 C, peaks to 100 C. Use M2 screws at 58.8 N.cm (steel), 39.2 N.cm (cast iron), 29.4 N.cm (aluminium), or M3 at 196, 127 and 98 N.cm. Load and moment ratings are not published for LRM; we confirm them for this model on request.
This code buys the matched pair: the 345 mm rail with one standard carriage factory-fitted. Carriage-only LRM parts do exist and carry a pairing code that must match the rail, but our carriage-only stock is very thin - only four SKUs - so a standalone replacement is usually a special order. When replacing a carriage, read the pairing code off the original part and send it with your enquiry.
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 LRM12N1X345S10BPT
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.