Airtac LRM Miniature Linear Guide LRM12L2X445S10BHT
The AirTAC Airtac LRM Miniature Linear Guide LRM12L2X445S10BHT 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 length445 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 LRM12L2X445S10BHT
The LRM12L2X445S10BHT is the bottom-mount version of a complete LRM12 set: a 12 mm wide, 445 mm stainless-steel rail and two long recirculating-ball carriages, pre-assembled and shipped together. The trailing T in the code means the rail bolts from underneath, so the top face stays flush - useful when screw heads above the rail would foul a carriage plate, a cover or an optical path.
Travel accuracy still depends on the mounting surface being ground or finish-milled, and with two carriages on one rail the datum should sit on the same side for both to keep running accuracy tight. The balls inside are Japanese-made ISO 3290 G10 grade - the grade covers the balls only, not the assembly - and a ball-retainer design limits, though does not guarantee against, dropped balls if the carriage is angled on or swapped hastily; a dummy rail helps with fitting. Keep the ambient at or under 80 C, with transient peaks to 100 C. Load and moment ratings are not published for LRM; ask us on an RFQ and we will confirm the figures for this exact set.
Airtac LRM Miniature Linear Guide LRM12L2X445S10BHT Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L2X445S10BHT |
|---|---|
| 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 | 445 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 LRM12L2X445S10BHT
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 2X445 | 2 carriages on a 445 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, 445 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 LRM12L2X445S10BHT Is Used
Laser alignment carriage
Inside a compact laser or optics module, bolting the rail from below leaves the top face clear for the mirrored carriage plate, with no screw heads to clip the beam path.
PCB test fixture slide
A bed-of-nails or functional-test fixture where the rail hides under the mounting plate, keeping the working surface clear for probes and connectors.
Inkjet dosing gantry
A small ink or adhesive dosing head whose carriage slides flush over the plate - bottom fixing means no protruding screws to foul nozzles or optics.
Is the Airtac LRM Miniature Linear Guide LRM12L2X445S10BHT the Right Guide?
Before ordering, tick off the configuration: complete-set form, 12 mm rail width, long carriage, two blocks, 445 mm rail, preload B, accuracy H, and - the defining choice here - bottom-mount direction, which cannot be changed after purchase, so confirm the frame can be tapped from underneath. If the load is heavy or cantilevered, LSH is the better engineering route because its catalogue publishes dynamic, static and moment ratings per carriage; LRM publishes none, and we confirm those figures model by model. For short travel needing crossed-roller rigidity, LGC is the alternative. Send the RFQ with your load case and we will confirm ratings and availability - size 12 is our deepest stocked LRM size, so lead times are usually short.
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 LRM12L2X445S10BHT FAQ
Rail width 12 mm, rail length 445 mm, two long carriages on one rail, light preload (B), high accuracy (H), and bottom-mount rail fixing with a 10 mm end-hole offset. Screw torques: M2 - 58.8 N.cm into steel, 39.2 into cast iron, 29.4 into aluminium; M3 - 196 N.cm into steel, 127 into cast iron, 98 into aluminium. Ambient limit is 80 C continuous, 100 C transient, and re-greasing is due every 100 km of travel or every 3 to 6 months. Load and moment ratings are not published for LRM - we confirm them per model through the RFQ.
Choose LRM when the envelope is tight and the duty is light - the 12 mm rail keeps the cross-section small and the 445 mm length gives both carriages room to travel. Choose LSH when the load is heavy or hangs off a cantilever: LSH publishes per-carriage dynamic, static and moment ratings so you can size the guide on paper, while LRM ratings are confirmed model by model through our RFQ. For short travel where crossed-roller rigidity matters more than stroke, LGC is the 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 LRM12L2X445S10BHT
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.