Airtac LRM Miniature Linear Guide LRM12L2X320S10APT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X320S10APT 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
- PreloadA — no 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 LRM12L2X320S10APT
LRM12L2X320S10APT is the bottom-mount version of the 320 mm, 12 mm wide precision LRM set: one stainless-steel rail with two long recirculating-ball carriages, fixed by screws driven up through the rail from below. The trailing T in the code is what sets this SKU apart from its top-mount twin - the mounting face is underneath, so the top of the rail stays clear for the carriage path and any guarding.
Two things make this configuration worth a look. First, bottom-fixing suits frames where you cannot reach the screw heads from above, such as an inverted stage or a rail set into a slot in a plate. Second, this is a precision P grade set, so the rail is ground to tighter straightness and height tolerance than the H version - worthwhile when a camera or probe rides the carriages. The balls in each carriage are Japanese ISO 3290 G10 grade balls, a ball-only rating rather than a standard for the guide. Double-lip seals hold lubricant and shut out dust; the outer cover shields the seal strip. Keep the surroundings at or below 80 C, peaks to 100 C. Because two carriages share one rail here, machine the mounting surface ground or finish-milled and set the datum face on the same side for both. No load or moment figures are published for LRM; we confirm them per model against your RFQ.
Airtac LRM Miniature Linear Guide LRM12L2X320S10APT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X320S10APT |
|---|---|
| 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 | 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.
Model Code: Airtac LRM Miniature Linear Guide LRM12L2X320S10APT
| 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. |
| A | A — no 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 LRM12L2X320S10APT Is Used
Inverted inspection stage
Mounting a glass slide or small sensor stage beneath a benchtop frame, where bottom-fixing keeps the top surface completely clear for the moving carriage.
Connector test fixture
Guiding a probe carrier over PCB connectors in an electronics test rig, with P-grade accuracy keeping contact points aligned across the full 320 mm of travel.
Micro-dispensing gantry
A lightweight dispensing head slide for adhesive or solder paste dots, where the twin long carriages resist tipping as the head accelerates along the rail.
Is the Airtac LRM Miniature Linear Guide LRM12L2X320S10APT the Right Guide?
Pick this SKU when the drawing already has a bottom-fixing slot and accuracy matters more than load margin. If your calculation needs published numbers to size against, LSH is the honest next step up: it lists per-carriage dynamic, static and moment ratings, which LRM simply does not publish. For short-travel work needing crossed-roller stiffness, look across at LGC.
Run the checklist before committing: form is a complete set (rail plus two long carriages), 12 mm rail width, 320 mm rail length, preload A with no clearance removal, accuracy P, bottom-mount rail direction, and a load rating confirmed with us. At 320 mm this rail sits comfortably inside the 1005 mm maximum catalogue length for size 12, so it arrives as a single piece with no spliced joint to align - one less thing to get wrong during installation.
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 LRM12L2X320S10APT FAQ
You receive one complete set: a 12 mm wide, 320 mm stainless rail drilled for bottom-mount fixing with a 10 mm end-hole offset, carrying two long carriages pre-filled with Kyodo Yushi PS No. 2 grease. Preload is A (none) and accuracy grade is P. Installation needs a ground or finish-milled mounting surface; M3 screws torque to 196 N.cm in steel, 127 N.cm in cast iron, 98 N.cm in aluminium, while M2 figures are 58.8, 39.2 and 29.4 N.cm. Ambient limit is 80 C with 100 C peaks; re-grease every 100 km or 3 to 6 months. AirTAC publishes no load or moment rating for LRM, so we verify the figure for this model with you before dispatch.
It flips the rail fixing to bottom-mount: screws pass up through the rail from underneath rather than down from the top. The rail profile, carriages, accuracy and everything else stay identical to the non-T version of this 320 mm set. Top-mount and bottom-mount rails are both held in our stock, so either version ships without a special order. If you are unsure which your machine needs, check whether the screw access in your base plate is from above or below.
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 LRM12L2X320S10APT
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.