Airtac LRM Miniature Linear Guide LRM12BK-L-H-C
The AirTAC LRM Miniature Linear Guide LRM12BK-L-H-C 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 asCarriage / block only
- SizeLRM12
- Rail width12 mm
- Carriage lengthLong carriage
- AccuracyH — high grade
- 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 LRM12BK-L-H-C
LRM12BK-L-H-C is the long recirculating-ball carriage from AirTAC's LRM miniature guide family, sold as a single carriage with no rail. The carriage runs on a 12 mm wide stainless-steel LRM rail and is finished to the H (high) accuracy grade; pairing code C is the match letter that ties it to rails carrying the same code. Because BK codes exclude the rail entirely, this item only suits you if the rail is already installed or is being ordered separately.
The long body spreads the ball complement over a longer footprint, which lengthens the effective bearing span and helps wherever a tipping moment creeps in - an overhanging sensor head, for example, or a small vertical slide. A double-lip seal under an outer cover scrapes oil back and keeps larger debris away from the seal strip, and the balls inside are Japanese-made ISO 3290 G10 grade, retained so they do not spill during ordinary handling. Ambient temperature must stay at or below 80 C, with transient peaks no higher than 100 C. Load and moment ratings are not published for LRM; we confirm the figures for your exact model before you order - send the RFQ and we will come back with them.
Airtac LRM Miniature Linear Guide LRM12BK-L-H-C Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12BK-L-H-C |
|---|---|
| Series | LRM Series Miniature Linear Guide |
| Supplied as | Carriage / block only |
| Construction | Recirculating ball, stainless-steel rail, common-rail design |
| Size code | LRM12 |
| Rail width | 12 mm |
| Carriage length | Long carriage |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | H — high grade |
| 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, matched by the pairing code |
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. This item is a carriage only. Order a complete set if you also need a rail.
Model Code: Airtac LRM Miniature Linear Guide LRM12BK-L-H-C
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| BK | Carriage / block only — no rail supplied. |
| L | Long carriage. |
| H | H — high grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
What Is In The Box
| This order | Carriage / block only |
|---|---|
| Rail | No — not supplied with this item |
| Carriage | Yes, one |
This is a carriage on its own. NO RAIL IS INCLUDED. 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 LRM12BK-L-H-C Is Used
Wafer inspection stage refresh
A semiconductor lab replacing a worn long carriage on a 12 mm miniature stage can drop this pairing-C block onto the existing rail after a clean and re-grease, restoring smooth travel without redoing the layout.
Electronics dispenser head
Long carriages suit small glue and solder dispenser gantries where the head overhangs the guide; the extended body lengthens the bearing span and steadies the tip near the ends of stroke.
Optical bench automation
Benchtop test rigs that index small cameras or fibre components along 12 mm rails use long H-grade blocks for repeatable positioning in a tight envelope.
Is the Airtac LRM Miniature Linear Guide LRM12BK-L-H-C the Right Guide?
Start the check with form: this is a carriage only, so a rail is not in the box and one must already exist or be ordered in the same 12 mm LRM profile with pairing code C. Next fix carriage length (long, as here), count (one), the rail length you need separately, the accuracy grade (H), the mounting direction of the rail, and whether you need preload - that is chosen with the rail, not the carriage. If the load is substantial or cantilevered, step up to LSH instead: that series publishes per-carriage dynamic, static and moment ratings you can size against, which LRM does not. For short travel where crossed-roller rigidity matters, look across to LGC. Whatever you pick, 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 LRM12BK-L-H-C FAQ
Rail width 12 mm; carriage length long; one carriage per code; accuracy grade H. No rail, rail length, preload or mounting direction is part of a carriage code - those belong to the rail order. Mounting screws: M3 at 196 N.cm into steel, 127 N.cm into cast iron, 98 N.cm into aluminium, or M2 at 58.8 / 39.2 / 29.4 N.cm. Ambient temperature must not exceed 80 C with peaks to 100 C, and re-greasing falls 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 before ordering.
No rail is included - BK codes are carriages only. The pairing letter C must match the letter on your existing 12 mm LRM rail; rails and carriages are graded and matched by this code, so a C carriage belongs on a C-marked rail. We hold only a handful of carriage-only SKUs on the shelf, so a different pairing letter is usually 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 LRM12BK-L-H-C
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.