Airtac LRM Miniature Linear Guide LRM12N1X85S5BH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X85S5BH 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 length85 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 LRM12N1X85S5BH
The LRM12N1X85S5BH is a complete AirTAC LRM miniature linear guide: one 85 mm rail in stainless steel, 12 mm wide, with a single standard-length recirculating-ball carriage supplied pre-fitted. The code fixes the rest of the configuration - preload B (light), accuracy H (high) and top-mount rail fixing, with the end mounting holes 5 mm in from the rail ends.
The carriage runs ISO 3290 G10 Japanese-made balls (a grade for the balls themselves, not an accuracy rating for the guide) behind double-lip seals, with an outer cover shielding the fixing screws and seal strip. Ball retention holds the balls in during handling, but a carriage offered up at an angle can still shed them, so seat it squarely. The common-rail profile means other LRM12 carriages share this same rail. Ambient temperature must stay at or below 80 C, with short peaks to 100 C. At 85 mm this is one of the shortest stocked rails in the range, and because stocked prices run roughly $66 to $831 across just two rail widths, trimming length is the single biggest cost lever. Load and moment ratings are not published for LRM; we confirm the figures for this exact model before ordering - just send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N1X85S5BH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X85S5BH |
|---|---|
| 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 | 85 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 LRM12N1X85S5BH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X85 | 1 carriage on a 85 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, 85 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 LRM12N1X85S5BH Is Used
Laser diode alignment slide
On a compact optics bench, the 85 mm rail gives a short, trim travel for aligning a laser diode or beam-splitter mount by hand, with light preload B keeping the position honest between adjustments.
PCB glue dispensing head
A miniature dispensing gantry for conformal-coating dots on circuit boards uses the light-preload carriage to return the head to the same dot position pass after pass.
Camera module inspection fixture
A fixture that slides a phone camera module under a microscope objective fits the 12 mm rail inside a shallow baseplate where a full-size guide would never sit.
Is the Airtac LRM Miniature Linear Guide LRM12N1X85S5BH the Right Guide?
Size honestly before you order. If the load is substantial or cantilevered, step up to the LSH series, which publishes per-carriage dynamic, static and moment ratings you can actually size against - LRM gives you no published numbers to work from. If travel is very short but the job needs crossed-roller rigidity, LGC is the better cross-grade choice. For this set, check: form (complete set, rail and carriage together), 12 mm rail width, standard carriage length, one carriage, 85 mm rail length, preload B (light - between free-running A and the rigid, less forgiving C), accuracy H, top-mount mounting direction, and confirm the load rating with us for this exact model before committing.
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 LRM12N1X85S5BH FAQ
A complete set: 12 mm wide stainless rail, 85 mm long, with one standard-length carriage; light preload (B), high accuracy (H), top-mount fixing, end holes 5 mm from the rail ends. Fixing screws: M2 torque to 58.8 N.cm in steel, 39.2 in cast iron, 29.4 in aluminium; M3 to 196, 127 and 98 N.cm respectively. Ambient temperature limit is 80 C with peaks to 100 C. Re-grease every 100 km of travel or every 3-6 months. Load and moment ratings are not published for LRM; we confirm them per model before ordering.
One assembled guide: the 85 mm stainless rail with the single carriage already fitted, greased with Kyodo Yushi PS No. 2. There is no second carriage, no mounting screws and no rail-only spare in the set. If you ever want a spare carriage on its own, note that carriage-only codes carry a pairing letter that must match the rail's, and our carriage-only stock is thin (four SKUs), so most spare carriages are a special order - plan ahead and quote the pairing code off the original part.
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 LRM12N1X85S5BH
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.