Airtac LRM Miniature Linear Guide LRM12N1X420S10APT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X420S10APT 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 length420 mm
- AccuracyP — precision 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 LRM12N1X420S10APT
Few miniature guides combine a precision accuracy grade with underside fixing, but LRM12N1X420S10APT does exactly that: the 12 mm stainless rail runs 420 mm long and bolts from below, while the single standard-length carriage carries grade P tolerances and preload A for unrestricted rolling. For an enclosed instrument where the screw line must stay hidden and the slide still has to measure, this is the configuration to shortlist.
Handle the assembly with respect and it will hold its character: do not strike or drop the rail, because accuracy can suffer with no visible mark, and seat the carriage square - the ball-retention design helps but does not make the balls drop-proof, and a dummy rail is worth having for repeated swaps. The recirculating balls are ISO 3290 G10 Japanese grade, and the double-lip seal plus outer cover close the raceway against dust. Ambient temperature stays at or below 80 C, peaking at 100 C. Load and moment ratings are not published for this range; send the RFQ and we will confirm the figures for this model.
Airtac LRM Miniature Linear Guide LRM12N1X420S10APT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X420S10APT |
|---|---|
| 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 | 420 mm (spliced sections) |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | P — precision 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 LRM12N1X420S10APT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X420 | 1 carriage on a 420 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. |
| P | P — precision grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 420 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 LRM12N1X420S10APT Is Used
Optical breadboard axis
A single-axis carriage on an optical breadboard carrying a sensor or mirror mount, where underside fixing keeps the breadboard surface clear and P grade holds the optical line.
Watch-parts assembly head
Cycling a light assembly head over tiny watch or camera components, where the free-rolling A preload minimizes resistance on a short-stroke servo axis.
Gauge fixture rebuild
Rebuilding a small go/no-go gauge fixture, where a P-grade underside-fixed rail replaces a worn slide without redesigning the hidden screw line.
Is the Airtac LRM Miniature Linear Guide LRM12N1X420S10APT the Right Guide?
Rail length, not rail width, drives the price across stocked LRM sets - the roughly $66 to $831 span covers just two widths, so trimming travel trims cost. That makes this 420 mm cut a mid-range ask at size 12, the width holding 924 of the 988 stocked sets. If your load is substantial or cantilevered, step up to LSH for its published per-carriage dynamic, static and moment ratings; for short travel needing crossed-roller stiffness, look at LGC. Checklist: complete set, 12 mm rail, standard carriage x1, 420 mm length, preload A (the least rigid of the three grades, so pick B or C if play matters more than drag), accuracy P, bottom-mount fixing - and confirm the load rating 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 LRM12N1X420S10APT FAQ
Rail width 12 mm and rail length 420 mm in stainless steel, one standard-length carriage, preload A (none), accuracy grade P, bottom-mount rail fixing. Ball grade is ISO 3290 G10, Japanese made. Screw torques: M3 at 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium; M2 at 58.8 / 39.2 / 29.4 N.cm. Ambient temperature limit is 80 C with transient peaks to 100 C; re-grease every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published by the manufacturer for LRM - we confirm them per model before ordering.
This SKU is a complete set: the 420 mm rail and one standard carriage, delivered pre-greased with Kyodo Yushi PS No. 2 - not a carriage-only part. If you ever need a replacement carriage alone, it must carry the pairing code matching the rail, and carriage-only stock is thin, so most are special orders. During service, do not dismantle the carriage or separate it from the rail unnecessarily; insertion at an angle or hurried swaps can still drop balls despite the retention design. Wipe off the rust-preventive oil, apply lubricant, and confirm an even film on the rail before first use.
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 LRM12N1X420S10APT
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.