Airtac LRM Miniature Linear Guide LRM12L1X220S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X220S10BHT 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 lengthLong carriage
- Carriages1
- 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 LRM12L1X220S10BHT
The trailing T in LRM12L1X220S10BHT changes how the rail is fixed: this is a bottom-mount set, with the 220 mm stainless-steel rail tapped so it bolts on from below - useful where the top face must stay clear or the screws are unreachable from above. One long carriage, 12 mm rail width, light preload B, accuracy H.
Handling deserves a note on this model: ball retention keeps the balls in the carriage during ordinary handling, but AirTAC warns that fitting the carriage at an angle or rushing a swap can still drop them, and on an inclined rail the carriage can slide off under its own weight - hold it. ISO 3290 grade G10 applies to the Japanese-made balls inside, not to the guide assembly. The double-lip seal and outer cover guard the raceway, and ambient temperature must stay at or below 80 C with 100 C peaks. Load and moment ratings are not published for LRM; ask on the RFQ and we confirm the numbers for this exact configuration.
Airtac LRM Miniature Linear Guide LRM12L1X220S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X220S10BHT |
|---|---|
| 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 | Long carriage |
| Carriages supplied | 1 |
| 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 LRM12L1X220S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X220 | 1 carriage 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, 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 LRM12L1X220S10BHT Is Used
Benchtop mill retrofit
A hobby machine rebuild where the table top must stay flush for the workpiece, so the rail bolts through from underneath.
Cable flex test rig
A test frame that rakes a cable sample back and forth over a mandrel on a 220 mm travel inside a warm enclosure - check the 80 C ambient ceiling first.
Concealed gauging slide
A gauging fixture built into a plate where the visible face must stay screw-free, which is exactly what the bottom-mount rail is for.
Is the Airtac LRM Miniature Linear Guide LRM12L1X220S10BHT the Right Guide?
LRM suits light-duty precision in a tight envelope; LSH suits the opposite, and its published per-carriage dynamic, static and moment ratings make it the honest choice once the load is heavy or overhung. LGC covers short travels that need crossed-roller stiffness.
Verify before ordering: complete set, 12 mm rail, long carriage, one carriage, 220 mm rail length, light preload B with its higher-drag trade-off, accuracy H, bottom-mount fixing. If you intend to hold a spare carriage, remember the pairing code letter system and that carriage-only purchases are a thin part of the range - most are special orders. Confirm the load rating with us via the RFQ; LRM publishes none, and we will supply the figure 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 LRM12L1X220S10BHT FAQ
A 12 mm wide stainless-steel rail cut to 220 mm, one long carriage, light preload B, accuracy H, and bottom-mount rail fixing. Use M2 screws at 58.8 N.cm into steel (39.2 cast iron, 29.4 aluminium) or M3 at 196, 127 and 98 N.cm. Keep ambient temperature at or below 80 C with peaks no higher than 100 C, and re-grease every 100 km of travel or every 3 to 6 months. LRM has no published load or moment ratings; we confirm them for your model before ordering.
Stay with this LRM set when the envelope is small and the duty light: bottom-mount fixing keeps the rail's top face clear and the profile low. Step up to LSH once the load or any cantilever grows serious, because LSH is the series with published dynamic, static and moment ratings per carriage - figures LRM does not list and we confirm per model instead. Short travels wanting crossed-roller stiffness belong with LGC.
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 LRM12L1X220S10BHT
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.