Airtac LRM Miniature Linear Guide LRM12N1X77S8.5AH
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X77S8.5AH 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 lengthStandard carriage
- Carriages1
- Rail length77 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 LRM12N1X77S8.5AH
The LRM12N1X77S8.5AH is a complete miniature guide set: one 77 mm long, 12 mm wide stainless-steel rail with a single standard-length recirculating-ball carriage. With an 8.5 mm end-hole offset, the outermost mounting holes sit closer to the rail ends than on the 13.5 mm-offset variant of the same rail, so more of the 77 mm length works as usable travel inside a fixed envelope.
That offset is the whole reason this part number exists next to its sibling, and it is worth checking against your base-plate drawing before ordering - the screw positions differ even though rail length and carriage are identical. The carriage runs on Japanese-made ISO 3290 G10 balls (a grade for the balls alone), retained so they do not fall out during handling, behind a double-lip seal and beneath an outer cover that keeps debris off the seal strip and hides the screw heads. Keep ambient temperature at or below 80 C, peaks to 100 C. Load and moment ratings are not published for LRM; ask us and we will confirm the figures for this model.
Airtac LRM Miniature Linear Guide LRM12N1X77S8.5AH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X77S8.5AH |
|---|---|
| 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 | Standard carriage |
| Carriages supplied | 1 |
| Rail length | 77 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 LRM12N1X77S8.5AH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X77 | 1 carriage on a 77 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, 77 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 LRM12N1X77S8.5AH Is Used
Wafer probe station slide
Positions a probe card over a small wafer piece on a benchtop probing station, where the near-end mounting holes free up every millimetre of the short axis.
Micro-dosing dispenser head
Guides a dispensing needle across a target on a small electronics potting line, with the compact rail tucked inside the dosing head.
Short-stroke shuttle
Repositions a small part carrier between two assembly nests in a compact rotary-dial machine, cycling a stroke that fits within the 77 mm rail.
Is the Airtac LRM Miniature Linear Guide LRM12N1X77S8.5AH the Right Guide?
Where the load is heavy or cantilevered, step up to LSH: it publishes per-carriage dynamic, static and moment ratings you can plug into a calculation, something LRM's catalogue does not do. Where travel is short and you need crossed-roller rigidity, step across to LGC. Before committing, confirm the match on: form (complete set or carriage only), rail width, carriage length, carriage count and rail length with end-hole offset, preload grade and its installation trade-off, accuracy grade, top- or bottom-mount direction, the pairing code if replacing a carriage, and the load rating confirmed with us.
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 LRM12N1X77S8.5AH FAQ
Rail: stainless steel, 12 mm wide, 77 mm long, 8.5 mm end-hole offset, top-mount. Carriage: one, standard length, preload grade A (none), accuracy grade H (high). Mounting: M3 screws at 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium (M2: 58.8 / 39.2 / 29.4 N.cm). Environment: 80 C ambient maximum, 100 C transient; re-grease every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM and are confirmed per model through us.
The interval is every 100 km of travel or every 3 to 6 months, whichever comes first - and the distance often binds first. A 200 mm stroke cycling once per second covers 100 km in roughly three weeks of continuous running, so a fast-cycling axis needs greasing far more often than the calendar suggests. Top up through the lubrication hole at the rear of the carriage: stroke it back and forth, inject from one side, and confirm an even film on the rail. Never mix lubricants of different types.
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 LRM12N1X77S8.5AH
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.