Airtac LRM Miniature Linear Guide LRM12L2X120S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X120S10BPT 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 length120 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 LRM12L2X120S10BPT
LRM12L2X120S10BPT is a complete miniature linear guide set: a 12 mm wide stainless-steel rail, 120 mm in length, running two long recirculating-ball carriages, with light preload grade B, precision accuracy grade P and mounting holes positioned for bottom-mount fixing on a 10 mm end offset. Rail and carriages come fitted and pre-greased as one unit.
This combination puts light preload together with the tighter precision grade - play is taken up for repeatable travel, and the tighter P grade suits fixtures where the measured or machined result depends on how steadily the carriage tracks. Bottom-mount holes let you fasten from beneath a sealed or finished surface. Servicing is governed by distance: re-grease every 100 km of travel or every 3 to 6 months, and a 200 mm stroke cycling once per second covers 100 km in roughly three weeks of continuous running, so the distance binds before the calendar does. The ISO 3290 G10 rating refers to the Japanese-made balls inside the recirculation, not to the assembly as a whole, and the double-lip seal with outer cover keeps the grease where it belongs. Ambient stays at or below 80 C, peaking at 100 C. Load and moment values are not published for LRM - we confirm the figure for this model through the RFQ.
Airtac LRM Miniature Linear Guide LRM12L2X120S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X120S10BPT |
|---|---|
| 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 | 120 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 LRM12L2X120S10BPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X120 | 2 carriages 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. |
| P | P — precision grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 120 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 LRM12L2X120S10BPT Is Used
Compact resin printer lift
A benchtop resin printer's build-plate lift uses the bottom-mount holes so the frame's top surface stays uninterrupted, while light preload keeps plate motion repeatable.
Sorting gate actuator slide
A light slider positions a divert gate on a small-parts packaging line, cycling fast enough that the 100 km grease interval, not the calendar, sets the service schedule.
Dial-indicator measuring fixture
A metrology fixture slides a dial gauge along a machined face; precision grade P supports a consistent trace along the part.
Is the Airtac LRM Miniature Linear Guide LRM12L2X120S10BPT the Right Guide?
Preload is the installation trade-off here: C grade is the rigid but stiffer, less forgiving choice, A runs completely free, and this B grade splits the difference with a small, controlled take-up of clearance. For substantial or cantilevered loads, step up to AirTAC LSH, which publishes dynamic, static and moment ratings per carriage - the sizing numbers LRM does not offer. For short strokes where crossed-roller rigidity beats ball smoothness, LGC is the alternative. Match checklist: complete set, 12 mm rail width, long carriage, two blocks, 120 mm rail, preload B, precision grade P, bottom-mount holes, and confirm the load rating with us through the RFQ 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 LRM12L2X120S10BPT FAQ
Rail width 12 mm; rail length 120 mm; two long carriages; preload B (light); accuracy P (precision); bottom-mount holes. Screw torques: M2 - 58.8 N.cm steel, 39.2 cast iron, 29.4 aluminium; M3 - 196 N.cm steel, 127 cast iron, 98 aluminium. Ambient ceiling 80 C, brief peaks 100 C. Re-grease after 100 km of travel or every 3 to 6 months. Catalogue mounting-surface rows run Q1 2-5 mm, Q2 1.2-3.2 mm, H1 1.5-3.5 mm and R max 0.2-0.5 mm, listed per size, so ask which row fits size 12. Load and moment ratings are not published for LRM and are confirmed per model.
Yes - one stainless-steel rail with both long carriages fitted and factory-filled with Kyodo Yushi PS No. 2 grease; nothing else is needed to run it. Wipe off the rust-preventive oil before first use and apply lubricant. Mount on a ground or finish-milled surface, using the same rail side as datum for both carriages. If you ever need a bare replacement carriage, note that carriage-only items are few and usually a special order, so plan.
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 LRM12L2X120S10BPT
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.