Airtac LRM Miniature Linear Guide LRM12L2X145S10BPT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X145S10BPT 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 length145 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 LRM12L2X145S10BPT
LRM12L2X145S10BPT combines two of the most demanding LRM options on one code: accuracy grade P, the precision grade, and preload B, the lightly preloaded fit, on a bottom-mount rail. The set is a 12 mm wide, 145 mm long stainless-steel rail with a 10 mm end-hole offset and two long carriages, fixed from beneath so the screws stay out of sight. Accuracy P means the carriages track the rail tighter than the high grade does; preload B takes out the internal clearance; together they suit metrology-grade miniature travel where both truth of path and crisp reversal are needed.
The long carriages matter here too - more balls share the contact and the bearing span lengthens, which steadies anything mounted between them. Balls are Japanese-made to ISO 3290 G10, protected by a double-lip seal and an outer cover over the fixings and seal strip. Ambient temperature must stay at or below 80 C with peaks to 100 C, a real boundary next to a laser diode, an oven door or any self-heating sensor block. As with all LRM codes, no load or moment rating is published; we confirm the figures for this exact model when you enquire. On budgeting: across the LRM range, the spread in price comes overwhelmingly from rail length and carriage count rather than rail width, so this 145 mm length sits toward the economical end of size 12.
Airtac LRM Miniature Linear Guide LRM12L2X145S10BPT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X145S10BPT |
|---|---|
| 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 | 145 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 LRM12L2X145S10BPT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X145 | 2 carriages on a 145 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, 145 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 LRM12L2X145S10BPT Is Used
Optical breadboard metrology slide
A measurement slide on an optical breadboard gains from accuracy P and preload B; fixing the rail from beneath keeps the breadboard's tapped top face uninterrupted.
Tunable optics or filter positioning
Sliding a filter, mirror or aperture into a beam path needs repeatable stops; preloaded long carriages remove reversal slop so the tuned position repeats visit after visit.
Small electronics assembly cell
A compact assembly cell placing connectors or chips on a 145 mm axis can use this light-duty 12 mm guide, with the bottom-mount rail tucked beneath a cover strip and away from debris.
Is the Airtac LRM Miniature Linear Guide LRM12L2X145S10BPT the Right Guide?
Order this code when you need precision-grade tracking, light preload and bottom-mount fixing all at once. The full match list: form is a complete set (rail plus two long carriages), rail width 12 mm, long carriage, two per rail, rail length 145 mm, preload B - which removes internal clearance but asks for a cleaner, truer mounting face than preload A - accuracy P, bottom-mount direction, and the 10 mm end offset. Have us confirm the load and moment rating for this exact model before you commit, because LRM publishes none of them.
If the load turns out to be substantial or overhung, LSH is the correct step up: it publishes dynamic, static and moment ratings per carriage, so you can size from a table rather than from an email. If the travel is short and the priority is maximum rigidity in a small box, crossed-roller LGC is the better cross-range choice. Both alternatives are worth a line in the same RFQ.
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 LRM12L2X145S10BPT FAQ
Confirmed from the code and catalogue: 12 mm rail width, 145 mm rail length, two long carriages, 10 mm end-hole offset, bottom-mount fixing, preload B (light) and accuracy P (precision). Torque M2 screws to 58.8 N.cm in steel, 39.2 N.cm in cast iron and 29.4 N.cm in aluminium; M3 screws to 196, 127 and 98 N.cm. Ambient temperature must not exceed 80 C, with peaks to 100 C, and re-grease every 100 km of travel or every 3 to 6 months. What the catalogue does not give is any load or moment rating for LRM; those we confirm per model when you enquire.
LRM carriages and rails are matched by a pairing code, lettered A to E, and a replacement carriage must share the code with the rail - so note the code off the original part if you might need a spare. Replacement carriages are ordered as carriage-only SKUs (codes containing BK, with no rail included in the box), and our carriage-only listing is thin, so most replacements are a special order rather than an off-the-shelf pickup. Handle swaps carefully too: the ball-retention design helps, but inserting a carriage at an angle or fitting and removing it quickly can still drop balls, and a dummy rail makes the job much safer.
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 LRM12L2X145S10BPT
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.