Airtac LRM Miniature Linear Guide LRM12N1X90S20BH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X90S20BH 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
- 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 LRM12N1X90S20BH
The LRM12N1X90S20BH is a complete AirTAC LRM set built around a 90 mm stainless-steel rail, 12 mm wide, with one standard-length recirculating-ball carriage factory-fitted and running with light preload (grade B) at high accuracy (H), top-mounted, the end holes 20 mm in from the rail ends.
Light preload takes up the running clearance, so the carriage returns to position without slop while keeping drag noticeably lower than a medium preload C would give - the trade-off for that extra rigidity is less forgiveness of misaligned mounting surfaces, which should be ground or finish-milled. The balls are ISO 3290 G10, Japanese made - a ball grade, not an assembly standard - retained by the ball-retention design so they stay put during handling, though hasty angled fitting can still drop one; a dummy rail makes swaps safer. The rail profile is common across LRM12 carriages. Keep ambient temperature under 80 C (peaks to 100 C). Worth knowing: long (L) carriages are stocked about as deeply as standard ones (512 against 475), so moving to a long carriage later costs nothing in availability. Load and moment ratings are not published for LRM - we confirm them per model through the RFQ.
Airtac LRM Miniature Linear Guide LRM12N1X90S20BH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X90S20BH |
|---|---|
| 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 | 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 LRM12N1X90S20BH
| 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. |
| B | B — light 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 LRM12N1X90S20BH Is Used
Confocal microscope focus axis
A manual focus slide on a confocal microscope benefits from light preload B: no play in the vertical path, yet the knob still turns easily during long sessions.
Force gauge test stand
A small hand-operated stand slides a force gauge over a test coupon; the light preload keeps the travel path repeatable between pull tests without added drag on the reading.
Desktop laser engraver slide
The head slide of a low-power diode laser engraver runs on the 90 mm rail, where preload B holds the beam spot steady against light cutting reactions.
Is the Airtac LRM Miniature Linear Guide LRM12N1X90S20BH the Right Guide?
Decide by load first, envelope second. A substantial or cantilevered load belongs on LSH, whose per-carriage dynamic, static and moment ratings are published and sized against; LRM publishes none of these. For very short travel where crossed-roller stiffness matters more than stroke, LGC is the alternative. For this set confirm: complete-set form (rail plus carriage), 12 mm rail width, standard-length carriage, single carriage, 90 mm rail length, preload B (light - removes clearance without the stiffness penalty of C on imperfect surfaces), accuracy H, top-mount mounting, and a load rating confirmed with us per model. If a future swap is likely, remember carriage-only purchases need a matching pairing code from the original part.
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 LRM12N1X90S20BH FAQ
This set has a 12 mm wide stainless-steel rail, 90 mm long, one standard carriage, light preload (B), high accuracy (H) and top-mount fixing, with end holes 20 mm from the rail ends. Mounting screws: M2 at 58.8 N.cm into steel (39.2 cast iron, 29.4 aluminium), M3 at 196 N.cm (127, 98). Keep ambient at or below 80 C, peaks 100 C, and re-grease every 100 km of travel or 3-6 months. Load and moment ratings are not published for LRM; we confirm the numbers for this model via the RFQ.
Yes, through carriage-only codes such as LRM12BK-..., but the pairing letter (A to E) on the new carriage must match the one on this rail, so record it from the original part on day one. Our carriage-only stock holds only a handful of SKUs, so expect most replacements to be a special order. When swapping, work carefully: the ball-retention design helps, yet an angled or hasty fit can still drop balls - a dummy rail makes the job safer, and the carriage should not be dismantled or separated from the rail more often than necessary.
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 LRM12N1X90S20BH
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.