Airtac LRM Miniature Linear Guide LRM12L2X220S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X220S10BPT 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 lengthLong carriage
- Carriages2
- Rail length220 mm
- AccuracyP — precision 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 LRM12L2X220S10BPT
LRM12L2X220S10BPT combines the two most demanding choices in the stocked LRM range: precision accuracy grade P and bottom-mount rail fixing, on a 12 mm wide, 220 mm long stainless rail carrying two long recirculating-ball carriages with light preload (B). The trailing T in the ordering code is what sets bottom-mount fixing - the rail bolts up from underneath, keeping the working surface above completely clear.
That combination suits builds where a covered or flush top surface must coexist with tight travel accuracy. Prepare the seating properly: the mounting face needs to be ground or finish-milled for the guide to reach its rated travel performance, and with two carriages on one rail, keep the datum face on the same side for both blocks. Japanese-made balls graded ISO 3290 G10 (a ball grade only, not an assembly standard) run behind double-lip seals under an outer cover. Ambient temperature must stay at or below 80 C with peaks to 100 C. There are no published load or moment ratings for LRM - send the RFQ and we confirm the figure for this specific part before it ships. Stocked rail lengths here run from 40 mm to 995 mm across 102 distinct lengths, so trimming this 220 mm travel up or down rarely means a special order.
Airtac LRM Miniature Linear Guide LRM12L2X220S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X220S10BPT |
|---|---|
| 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 | 2 |
| Rail length | 220 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 | 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 LRM12L2X220S10BPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long 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. |
| P | P — precision 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 LRM12L2X220S10BPT Is Used
Laser beam alignment rig
A turning-mirror or optic carrier traversed along a 220 mm path inside a laser alignment fixture. Precision P travel keeps the beam path consistent, and bottom-mount fixing leaves the optical plane above unobstructed by screw heads.
ESD-controlled assembly station
A small electronics assembly head that must stay flush beneath a dissipative work surface. The bottom-mounted 220 mm rail hides all fixings, and the stainless rail tolerates the wipe-downs an ESD-controlled bench demands.
Rebuilt jig and fixture upgrade
A toolmaker reworking a worn jig swaps an old slide for this precision set, bolting the rail from below so the fixture's locating face is untouched. Grade P and the long twin carriages restore flat, repeatable motion over the full 220 mm.
Is the Airtac LRM Miniature Linear Guide LRM12L2X220S10BPT the Right Guide?
When the load becomes substantial or hangs on a cantilever, move to LSH, which publishes per-carriage dynamic, static and moment ratings you can size from - LRM publishes none, so never size it by guesswork. For a short stroke needing crossed-roller stiffness, LGC is the cross-grade alternative. Confirm each element of this code before ordering: complete set form, 12 mm rail width, long carriages, two blocks, 220 mm rail, light preload B (lower drag than medium C, slightly freer than no preload), precision accuracy P, bottom-mount fixing, and a confirmed load rating from us for this exact 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 LRM12L2X220S10BPT FAQ
Rail width 12 mm (the size code is the rail width), rail length 220 mm, 10 mm end-hole offset, two long (L) carriages, light preload B, precision accuracy P, bottom-mount fixing. M3 screws torque to 196 N.cm in steel, 127 N.cm in cast iron, 98 N.cm in aluminium. Ambient temperature limit 80 C, transient peaks 100 C. Factory lubrication is Kyodo Yushi PS No. 2, topped up every 100 km of travel or 3 to 6 months. Load and moment ratings are not published for LRM; we confirm them for this exact model via the RFQ.
Stay with LRM when the envelope is tight and the duty is light: this is a 12 mm rail in a 220 mm length, chosen for smooth, precise motion in a small machine. Step up to LSH when the load is heavy, offset or cantilevered - LSH publishes per-carriage dynamic, static and moment ratings you can calculate against, and LRM publishes none of these, so sizing LRM means confirming figures with us per model. For very short travel where crossed-roller rigidity matters most, look at LGC as a third option.
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 LRM12L2X220S10BPT
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.