Airtac LRM Miniature Linear Guide LRM12N1X90S20AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X90S20AH 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 length90 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 LRM12N1X90S20AH
The LRM12N1X90S20AH is a complete miniature guide set from AirTAC's LRM series: a 90 mm stainless-steel rail, 12 mm wide, carrying one standard-length ball carriage straight from the factory. This variant has no preload (grade A), high accuracy (H), top-mount fixing and end holes spaced 20 mm from the rail ends.
With no preload the carriage glides with the least drag the series offers, which suits hand-adjusted stages and any axis driven by a small motor. Inside, ISO 3290 G10 Japanese balls (this grade covers the balls only) recirculate behind double-lip seals under an outer cover that keeps larger debris off the seal strip. Carriages ship pre-filled with Kyodo Yushi PS No. 2 grease; top up through the rear lubrication hole every 100 km of travel or every 3-6 months, whichever comes first - on a 200 mm stroke cycling once a second, 100 km arrives in about three weeks of continuous running. Ambient limit is 80 C. Size 12 is the heart of our LRM stock (924 of 988 stocked sets), so this configuration ships fast. Load and moment ratings are not published for this series; we confirm them per model - ask us before you commit.
Airtac LRM Miniature Linear Guide LRM12N1X90S20AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X90S20AH |
|---|---|
| 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 | 90 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 LRM12N1X90S20AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X90 | 1 carriage on a 90 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, 90 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 LRM12N1X90S20AH Is Used
Small pick-and-place head
A benchtop pick-and-place handling 0402 components gains from preload A's free-running travel and the compact 90 mm rail that slots into a tight gantry arm.
Sensor assembly press slide
A low-force slide that seats a dome switch into a sensor housing runs one carriage on a 90 mm rail for a short, guided press stroke at the end of an assembly cell.
Fiber coupler alignment
A manual fiber-to-lens coupler stage uses the zero-preload carriage for a silky hand adjustment, with accuracy grade H holding the adjusted position repeatable.
Is the Airtac LRM Miniature Linear Guide LRM12N1X90S20AH the Right Guide?
Match the guide to the job, not the other way round. Where loads are heavy or overhung, choose LSH instead - its published per-carriage dynamic, static and moment ratings let you calculate a life, something LRM's table simply does not offer. For short-travel work needing roller rigidity, cross to LGC. Before ordering this set, work through: complete-set form, 12 mm rail width, standard carriage, one carriage, 90 mm rail length, preload A (none - the free-running grade), accuracy H, top-mount direction, and a confirmed load rating from us for this exact code. There is no pairing code on sets; that applies only when buying a carriage alone.
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 LRM12N1X90S20AH FAQ
Rail width 12 mm in stainless steel, rail length 90 mm, one standard-length carriage, preload A (none), accuracy H (high), top-mount mounting, end holes 20 mm from the rail ends. Torques: M2 screws 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 screws 196, 127 and 98 N.cm. Ambient must not exceed 80 C (peaks 100 C). Re-grease every 100 km or every 3-6 months. Basic dynamic, static and moment ratings are not published for LRM - we confirm them per model, so ask before ordering.
Choose LSH when the load is substantial or cantilevered: it publishes per-carriage dynamic, static and moment ratings you can size and calculate life against. LRM publishes none of those, so its place is light-duty miniature positioning where the 12 mm envelope, smooth travel and high accuracy H matter more than a big load. For very short travel needing crossed-roller rigidity, LGC sits between. If in doubt, send us the load, moments and stroke and we will confirm which LRM model - or its LSH equivalent - carries it.
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 LRM12N1X90S20AH
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.