Airtac LRM Miniature Linear Guide LRM12L1X145S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X145S10BHT 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 length145 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 LRM12L1X145S10BHT
LRM12L1X145S10BHT is the bottom-mount variant of AirTAC's 12 mm miniature guide line: a 145 mm stainless-steel rail, one long recirculating-ball carriage, light preload and high accuracy, with the trailing T in the code specifying that the mounting screws are driven from underneath the rail. One complete set, assembled and factory-greased, is what arrives.
Bottom mounting changes how you design around the guide. The top face stays uninterrupted, so a waycover, bellows or falling debris never meets a row of exposed fasteners, and the carriage travels over a clean surface - a genuine advantage where the rail sits in a slot or where parts and dust drop onto the machine bed. Accuracy is grade H, preload is the light B grade for free-running travel, and the balls inside are Japanese ISO 3290 G10 grade (that grade covers the balls only), held by the retention design and sealed by a double lip beneath an outer cover. Keep ambient temperature at or below 80 C, with peaks to 100 C. AirTAC publishes no load or moment figures for LRM; we confirm them for this model through the RFQ before you buy.
Airtac LRM Miniature Linear Guide LRM12L1X145S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X145S10BHT |
|---|---|
| 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 | 145 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 LRM12L1X145S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X145 | 1 carriage 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. |
| H | H — high grade. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 145 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 LRM12L1X145S10BHT Is Used
Laser path adjustment slide
A fold-mirror or beam-splitter carrier on a compact optical rail, mounted from below so no screw heads interrupt the aperture line above the guide; precision work at room temperature, far inside the 80 C limit.
Benchtop vision sorting gate
A small camera carriage inspecting parts on a feeder - slot-mounted rails keep dropped parts and glass dust away from the fasteners, while the double-lip seal and outer cover handle the rest.
Semiconductor test handler axis
A socket-press slide in a chip test fixture, where the long carriage steadies the press head through its short stroke and bottom-mount fixing keeps the top deck clear for part flow.
Is the Airtac LRM Miniature Linear Guide LRM12L1X145S10BHT the Right Guide?
Start from the mounting direction, because that is what separates this SKU from its top-mount twin: if your base plate is drilled from below or the rail must sit flush in a slot, this is the one. Then check the rest - complete set form, 12 mm rail width, long carriage (which lengthens the bearing span and helps against tipping), one carriage, 145 mm rail length, preload B for low-drag travel, accuracy H. If you run two carriages on one rail elsewhere in the machine, keep the datum edge on the same side of both rails for better running alignment. Where the load is substantial or cantilevered, LSH is the honest step up: it publishes dynamic, static and moment ratings per carriage, which LRM does not, while LGC suits short travels needing crossed-roller rigidity. Rail length rather than width drives the price across our stocked range, so shorten travel before downsizing. Confirm the load rating with us before committing.
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 LRM12L1X145S10BHT FAQ
The hard ones: a stainless-steel rail 12 mm wide and 145 mm long with a 10 mm end-hole offset; one long carriage; preload grade B (light); accuracy grade H (high); bottom-mount (T) fixing. Re-grease with Kyodo Yushi PS No. 2 (the factory charge) every 100 km of travel or every 3 to 6 months, injected through the hole at the rear of the carriage; charge volumes run 0.02 to 1.0 cm3 first fill and 0.01 to 0.50 cm3 top-up across the LRM range, per model. Driving torques: M2 screws 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 screws 196, 127 and 98 N.cm on the same materials. Ambient temperature must stay at or below 80 C, with peaks to 100 C. What we cannot quote: load and moment ratings - none are published for LRM, and we confirm them for this exact model on request.
The trailing T in LRM12L1X145S10BHT means the rail is fixed by screws driven from beneath, leaving the top running face uninterrupted - the opposite of the standard top-mount version. The box holds the complete set: the 145 mm stainless rail and the long carriage, assembled and factory-greased, not a bare carriage and not a rail alone. If you later need a replacement carriage on its own, it carries a pairing code (A to E) that must match the rail's code, and since we stock only four carriage-only SKUs, most replacements are a special order.
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 LRM12L1X145S10BHT
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.