Airtac LRM Miniature Linear Guide LRM12N2X420S10AHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X420S10AHT is a miniature linear guide on a 12 mm stainless-steel rail with recirculating-ball carriages. 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
- Carriages2
- Rail length420 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 LRM12N2X420S10AHT
This is the bottom-mount version of the LRM12 two-carriage set: LRM12N2X420S10AHT carries a 12 mm stainless-steel rail, 420 mm long, with two standard recirculating-ball carriages, preload A (none) and accuracy H. The trailing T in the code means the rail seats in a machined recess and is bolted down from below - the right layout when the top face of the plate belongs to the machine table or the product.
Handling matters more than people expect on this version: the ball-retention design keeps balls captive during normal handling, but tilting a carriage onto the rail or swapping it hastily can still drop balls, so keep a dummy rail for carriage changes. A further caution - on any inclined rail the carriages can slide off under their own weight, so hold them. ISO 3290 G10 Japanese-made balls run in each circuit (the grade applies to the balls alone, not the assembly), behind a double-lip seal with an outer cover over the seal strip. The ambient limit is 80 C, peaking briefly at 100 C. Load and moment ratings are not published for this series; we confirm them per model - ask with your RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X420S10AHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X420S10AHT |
|---|---|
| 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 | 2 |
| Rail length | 420 mm (spliced sections) |
| 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 LRM12N2X420S10AHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X420 | 2 carriages 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. |
| H | H — high grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 420 mm |
| Carriage | Yes, 2 |
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 LRM12N2X420S10AHT Is Used
Semiconductor test indexer
Indexing a wafer-level test head between socket positions inside a closed fixture: bottom-mount lets the rail bolt to the underside of the deck while the top face stays clear for the product.
Lead-form inspection fixture
A slide carrying component leads past a camera for bend and coplanarity checks; the T-mount rail bolts up under the plate, leaving the inspection surface unbroken by screw heads.
Small machine axis rebuild
Replacing a worn slide on a compact marking or workholding machine: the 12 mm profile drops into an existing slot but fastens from below, so swarf cannot pack into the screw heads.
Is the Airtac LRM Miniature Linear Guide LRM12N2X420S10AHT the Right Guide?
Decide the mounting direction before you order: this bottom-mount version needs a recessed seat with clearance for screw heads sitting proud beneath the rail, so check the base-plate detail first. For heavy or overhung loads, choose AirTAC LSH instead - its catalogue lists per-carriage dynamic, static and moment ratings, which LRM does not publish. For short strokes needing crossed-roller rigidity, LGC fits better. Match list: complete set, 12 mm rail width, standard carriages, two per rail, 420 mm rail length, preload A (freer motion, lower rigidity than B or C), accuracy H, bottom-mount. Ask us to confirm the load rating for this model 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 LRM12N2X420S10AHT FAQ
Rail width 12 mm, rail length 420 mm, carriage length standard, two carriages, preload A, accuracy H, rail mounted from below (the trailing T). M3 screw torques: 196 N.cm steel, 127 N.cm cast iron, 98 N.cm aluminium. The published ambient limit is 80 C, briefly 100 C. Lubrication: pre-filled with Kyodo Yushi PS No. 2, topped up every 100 km of travel or every 3 to 6 months - the quantity varies per model, so follow the datasheet. No load, moment or speed figures are published for LRM; we confirm capacity per model before you order.
The box holds the 420 mm, 12 mm stainless rail with both standard carriages fitted and pre-greased with Kyodo Yushi PS No. 2 - no brackets, no extra fasteners. The T gives a bottom-mount rail: it sits in a machined recess and clamps from underneath, so your base plate needs a slot or counterbore wide enough for the screw heads. A spare carriage for field swaps is normally a special order, since carriage-only stock is thin - plan for one when you place the set order.
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 LRM12N2X420S10AHT
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.