Airtac LRM Miniature Linear Guide LRM12L1X315S7.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X315S7.5AH 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 lengthLong carriage
- Carriages1
- Rail length315 mm
- AccuracyH — high 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 LRM12L1X315S7.5AH
LRM12L1X315S7.5AH is a complete AirTAC LRM12 miniature linear guide set. In the box: one 315 mm stainless-steel rail with a 7.5 mm end-hole offset and a single long (L) recirculating-ball carriage, preassembled and pre-greased, ready to bolt down. The rail is 12 mm wide, so the envelope stays compact on a small machine table.
The long carriage spreads its ball complement over a longer foot, which steadies any tipping component riding on a single-guide axis. LRM uses a common-rail profile, so other LRM12 carriages can run on this rail later; the ball retainer keeps the ISO 3290 G10 balls in place while you handle the carriage, and a double-lip seal plus outer cover hold out dust and grease wash-out. Ambient temperature must stay at or below 80 C, with brief peaks to 100 C - worth remembering beside a soldering rework bench. AirTAC publishes no load or moment rating for LRM; we confirm the figures for this exact model before you order - send the RFQ.
Airtac LRM Miniature Linear Guide LRM12L1X315S7.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X315S7.5AH |
|---|---|
| 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 | 1 |
| Rail length | 315 mm |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | H — high 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 LRM12L1X315S7.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X315 | 1 carriage on a 315 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. |
| H | H — high grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 315 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 LRM12L1X315S7.5AH Is Used
PCB AOI camera slide
A 315 mm stroke is a natural fit for an automated optical inspection camera traversing a printed-circuit board on a compact inline tester; the long carriage keeps the camera head from nodding as it travels.
Laser-diode characterization fixture
Bench rigs that sweep a detector past a laser diode need smooth, low-stiction travel; preload A gives the freest sliding, and the 80 C ambient cap keeps you honest near hot components.
Micro-dispensing head guidance
Fine-pitch fluid dispensing on small electronic assemblies benefits from the double-lip seal excluding cured adhesive particles from the raceways.
Is the Airtac LRM Miniature Linear Guide LRM12L1X315S7.5AH the Right Guide?
If the load grows beyond light duty or hangs off a cantilever, move up to LSH, which publishes per-carriage dynamic, static and moment ratings you can actually size against - LRM gives you none. For short strokes where crossed-roller rigidity matters more, LGC is the alternative. A cost note worth knowing: within the stocked LRM12 sets the price spread (about $66 to $831) tracks rail length and carriage count, not rail width, so 315 mm of travel sits mid-range. Checklist: complete set, 12 mm rail, long (L) carriage, one block, 315 mm rail, preload A (no preload - freest running, though the carriage can rock slightly under side force), accuracy H, top-mount, 7.5 mm end-hole offset. Confirm the load and moment ratings with us before you commit.
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 LRM12L1X315S7.5AH FAQ
A complete set: 12 mm wide stainless-steel rail, 315 mm long, one long (L) carriage, preload A (none), accuracy grade H (high), top-mount rail, 7.5 mm end-hole offset. Screw torques: M2 - 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 - 196, 127 and 98 N.cm respectively. Ambient limit 80 C (peaks to 100 C). Re-grease every 100 km of travel or every 3 to 6 months with the same lubricant type. Load and moment ratings are not published for LRM; we confirm them per model on request.
Yes - rail and carriage arrive as one assembled, greased unit, so this is not a carriage-only BK code. Spare carriages are ordered as BK codes carrying a pairing letter A to E that must match the rail; only a handful of carriage-only SKUs are stocked, so most spares are a special order. The ball retainer helps during a swap, but inserting a carriage at an angle can still drop balls - a dummy rail makes the job safer. Note too that LRM5, LRM7 and LRM9 are order-only; 12 mm and 15 mm are the stocked sizes.
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 LRM12L1X315S7.5AH
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.