Airtac LRM Miniature Linear Guide LRM12L2X320S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X320S10BPT 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 length320 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 LRM12L2X320S10BPT
The T at the end of this code changes one thing that matters on the shop floor: the rail bolts in from underneath. Everything else matches its top-mount twin - a 320mm stainless rail, 12mm wide, with two long recirculating-ball carriages and 10mm offset (S10) end holes. Bottom-mount suits frames and plates where the screw heads cannot be reached from above, such as a rail let into a slot or mounted under an overhanging beam.
Whatever the mounting direction, the mounting face should be ground or finish-milled, and either rail edge can serve as the datum face. With two carriages sharing this rail, put the datum on the same side for both - running accuracy improves measurably. Ball grade is ISO 3290 G10, Japanese-made, a spec that applies to the balls alone. A double-lip seal handles oil retention and dust, and the outer cover keeps chips and screw heads out of the seal strip. Ambient temperature is capped at 80 C with short excursions to 100 C. No load or moment ratings are published for LRM; request confirmation per model through the RFQ and we will check this configuration against your duty cycle.
Airtac LRM Miniature Linear Guide LRM12L2X320S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X320S10BPT |
|---|---|
| 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 | 320 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 LRM12L2X320S10BPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long 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. |
| P | P — precision 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 LRM12L2X320S10BPT Is Used
PCB dispensing gantry slide
A small gantry carrying a glue or solder-paste needle over populated boards: bottom-mount keeps the rail face flush with the gantry underside, and the long twin carriages steady the dispense head.
Vision-system XY nest fixture
An electronics test fixture where the camera nest slides on two axes beneath the part: the 12mm rail fits the nest frame and precision grade holds the optical alignment between stations.
Under-bench metrology stage
A measuring instrument with the guide recessed into the base casting, where screws can only be reached from below - exactly the case the bottom-mount T format exists for.
Is the Airtac LRM Miniature Linear Guide LRM12L2X320S10BPT the Right Guide?
Decide the checklist in this order: form (complete set), rail width (12mm), carriage length (long), count (2 per rail), rail length (320mm), preload (B - light, the forgiving choice for smooth running), accuracy (P - precision), then mounting direction (bottom-mount - confirm your base plate actually has through-access from below before choosing the non-T version). If the duty involves heavy or overhung loads, step up to LSH: it publishes dynamic, static and moment ratings per carriage that you can size against, which LRM does not. For short-travel work demanding crossed-roller stiffness, LGC is the better series. Either way, confirm the load ratings with us via RFQ before you cut metal.
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 LRM12L2X320S10BPT FAQ
Published: 12mm rail width, 320mm rail length, two long carriages, S10 end-hole offset, light preload (B), precision grade (P), bottom-mount rail. Fastening: M3 screws at 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium, on ground or finish-milled faces. Environment: maximum 80 C ambient, peaks to 100 C. Lubrication: Kyodo Yushi PS No. 2 fitted at the factory, topped up every 100 km of travel or 3 to 6 months. Not published for LRM: load, moment and running-parallelism ratings - we confirm these per model on request.
One complete set: the 320mm stainless-steel rail with both long carriages factory-fitted and pre-greased, ready to bolt down from below. No separate carriage, no rail-only stock, no mounting screws are included with the set. If you later need a spare carriage, remember that carriage-only SKUs are thinly stocked here and most replacements are a special order, so plan ahead - a dummy rail helps you swap a carriage without dropping balls.
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 LRM12L2X320S10BPT
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.