Airtac LRM Miniature Linear Guide LRM12N2X220S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12N2X220S10BHT 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 length220 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 LRM12N2X220S10BHT
The LRM12N2X220S10BHT is a complete miniature linear guide set: one 12 mm wide stainless steel rail, 220 mm long, carrying two standard-length recirculating-ball carriages fitted at the factory. The trailing T in the code specifies bottom-mount rail fixing, so the fasteners are driven from underneath the rail and sit hidden inside the mounting surface - useful when nothing may project above the guide line. Everything you need for one 220 mm axis is in this box.
AirTAC builds the LRM range around a common-rail profile, so a different LRM12 carriage can share this same rail, and around a ball-retention design that stops the balls spilling during ordinary handling - though a carriage offered at an angle, or swapped hastily, can still drop balls, so keep a dummy rail handy if you plan field changes. The balls themselves are Japanese-made ISO 3290 G10 grade for roundness and wear, and each carriage runs behind a double-lip seal with an outer cover shielding the screw line. Ambient temperature must stay at or below 80 C, with peaks no higher than 100 C. Load and moment ratings are not published for LRM; we confirm them for this exact model before you order - send the RFQ.
Airtac LRM Miniature Linear Guide LRM12N2X220S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12N2X220S10BHT |
|---|---|
| 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 | 220 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 LRM12N2X220S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| N | Standard carriage. |
| 2X220 | 2 carriages on a 220 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, 220 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 LRM12N2X220S10BHT Is Used
Compact microscope focus slide
A bottom-mount 12 mm rail keeps the fasteners below the optical axis, letting the focus carriage ride a clean line with the light preload of grade B giving fine, low-stick motion under the fine-focus knob.
Wafer inspection XY module
Twin high-accuracy carriages on a 220 mm rail carry a small inspection camera stage over a repeatable travel path, with the hidden screw line leaving the top surface free for fixture mounting.
Laser diode test fixture
A light-preload miniature guide lets an alignment slide settle without overshoot when positioning a laser diode against a test photodiode, while the double-lip seal keeps dust out of the raceway.
Is the Airtac LRM Miniature Linear Guide LRM12N2X220S10BHT the Right Guide?
Preload B is the light grade on LRM: it gives the smoothest, lowest-friction running of the three grades, at the cost of a slightly more compliant feel under a tipping load. Two carriages on one 220 mm rail help resist that tipping along the travel direction. If your load is substantial or cantilevered, step up to the larger LSH series instead - it publishes per-carriage dynamic, static and moment ratings you can actually size against, which LRM does not. If travel is short and the job demands crossed-roller rigidity in a small footprint, look across at LGC. Before committing, run the checklist: form (complete set here), rail width 12 mm, standard carriage length, 2 carriages, 220 mm rail, preload B, accuracy H, bottom-mount direction - and confirm the load rating with us for this specific model.
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 LRM12N2X220S10BHT FAQ
This is a complete set: 12 mm wide stainless steel rail, 220 mm long, with two standard-length carriages, preload grade B (light), accuracy grade H (high), and bottom-mount rail fixing (the trailing T). Mounting screws should be torqued to the catalogue figures - M2: 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3: 196 N.cm into steel, 127 into cast iron, 98 into aluminium - and the mounting surface must be ground or finish-milled to achieve rated travel accuracy. Ambient temperature must not exceed 80 C, with transient peaks no higher than 100 C. Re-grease every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM; we confirm them per model - just ask.
Choose LRM when the envelope is tight and the duty is light: this set gives you a 12 mm rail, two carriages on 220 mm of travel and a smooth light preload in a very small package. Choose LSH when the load is substantial or cantilevered, because LSH publishes per-carriage dynamic, static and moment ratings you can plug into a sizing calculation - LRM publishes none, and its ratings must be confirmed with us per model. If the travel is short and crossed-roller rigidity matters more than stroke, LGC is the cross-series alternative.
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 LRM12N2X220S10BHT
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.