Airtac LRM Miniature Linear Guide LRM12N1X120S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N1X120S10BHT 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 length120 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 LRM12N1X120S10BHT
This LRM12N1X120S10BHT is a complete miniature guide from AirTAC: a stainless-steel rail 12 mm wide and 120 mm long, delivered with one standard-length ball carriage in place, preloaded to grade B and ground to accuracy grade H. The trailing T in the code marks the bottom-mount rail version - the fixing is taken through the underside, so this is the variant to specify when the screws cannot be reached from above the rail.
Bottom-mounting puts the preparation burden on your base plate: the catalogue calls for a ground or finish-milled surface, and the required flatness rows (Q1 from 2 to 5 mm, Q2 from 1.2 to 3.2 mm, H1 from 1.5 to 3.5 mm, corner radius R max 0.2 to 0.5 mm) are listed per size, so check the datasheet row for size 12 before machining. Either side of the rail can serve as the datum face. The recirculating balls are ISO 3290 G10 grade, Japanese made - a specification of the balls themselves rather than of the assembly. Lubrication is straightforward: the carriage leaves the factory filled with Kyodo Yushi PS No. 2 grease, and topping up through the rear lubrication hole every 100 km of travel (or every 3 to 6 months) keeps the double-lip seal fed. One handling note that matters once the rail is bolted underneath a plate: on an inclined mounting the carriage can slide off under its own weight, so hold it while positioning. Load and moment ratings are not published for this series; we confirm them per model - ask us via the RFQ.
Airtac LRM Miniature Linear Guide LRM12N1X120S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N1X120S10BHT |
|---|---|
| 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 | 120 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 | 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 LRM12N1X120S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 1X120 | 1 carriage on a 120 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, 120 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 LRM12N1X120S10BHT Is Used
Optical inspection slider
A camera slider inside a compact vision inspection station carries the sensor under the part; bottom-mount fixing keeps the top surface clear for the workpiece.
Belt-driven micro gantry
A small belt-driven gantry for handling connector blocks uses this 12 mm rail on the cross axis, where the underside fixing tucks the rail into the extrusion slot.
Dispensing machine retrofit
Upgrading an older tabletop dispensing machine often means replacing a worn slide in a cramped pocket - a bottom-mount rail goes in without re-machining the top deck.
Is the Airtac LRM Miniature Linear Guide LRM12N1X120S10BHT the Right Guide?
Specify this bottom-mount set when the structure dictates access from below - a covered slide, a rail recessed into a slot, or a plate whose top face must stay clean for the moving stage. Everything else in the decision follows the same logic as any LRM12: light preload B for the smoothest running, grade H accuracy for general precision work, and a 120 mm rail for a correspondingly short stroke. If the load is more than light duty, or it overhangs the carriage, move up to LSH, which lists dynamic, static and moment ratings per carriage that you can design against - LRM has no published figures, so we confirm capacity for your build. Short travel with a need for maximum rigidity points to crossed-roller LGC instead. Check the list before ordering: form (set versus carriage only), 12 mm rail width, carriage length, block count, 120 mm rail, preload grade and its installation trade-off, accuracy grade, mounting direction, and a confirmed load rating from 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 LRM12N1X120S10BHT FAQ
You receive a matched complete set: the 120 mm stainless-steel rail, 12 mm wide, with one standard-length carriage already fitted to it - not a carriage-only part and not a rail alone. The T in the code confirms the bottom-mount rail format, so plan your fixing holes and access from the underside. No dummy rail, bolt caps or separate lubricant are supplied; carriages arrive pre-filled with Kyodo Yushi PS No. 2. Note that we stock only four carriage-only LRM SKUs in total, so if you later need a spare carriage without a rail, expect a special order - and keep the pairing code from any carriage you buy. Load and moment ratings are not published for LRM; we confirm them for this model via RFQ.
Confirm the mounting surface first: it must be ground or finish-milled, and the catalogue's flatness rows (Q1, Q2, H1 and corner radius R) are given per size rather than as one universal value. For the hardware, M3 screws take 196 N.cm into steel, 127 N.cm into cast iron and 98 N.cm into aluminium, with M2 at 58.8, 39.2 and 29.4 N.cm. The guide runs at ambient temperatures up to 80 C, peaking briefly at 100 C, and needs fresh grease every 100 km of travel or every 3 to 6 months. This set is 12 mm rail width, 120 mm rail length, one standard carriage, preload B (light), accuracy H (high), bottom-mount. Load and moment ratings are not published for the LRM series - request the confirmed figure for this model through our RFQ.
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 LRM12N1X120S10BHT
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.