Airtac LRM Miniature Linear Guide LRM12BK-N-H-C
The AirTAC Airtac LRM Miniature Linear Guide LRM12BK-N-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 lengthStandard 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-N-H-C
This listing is the carriage alone. LRM12BK-N-H-C is an AirTAC LRM standard-length carriage block in high accuracy grade H, matched by pairing code C to a size 12 rail with a 12 mm wide running surface. No rail is included in the box - order the rail separately or keep the one already mounted in your machine.
Inside the block, ISO 3290 G10 Japanese steel balls recirculate through ground raceways, and the ball-retention design keeps them captive during normal handling - though the maker warns that fitting the carriage at an angle or rushing a swap can still drop balls, so a dummy rail is worth having. A double-lip seal scrapes oil and shuts out dust, an outer cover shields the seal strip, and the ambient temperature must stay at or below 80 C with peaks no higher than 100 C. Carriage material and load capacity are not published figures for LRM; tell us your application and we confirm the ratings for this exact code before you order.
Airtac LRM Miniature Linear Guide LRM12BK-N-H-C Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12BK-N-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 | Standard 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-N-H-C
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| BK | Carriage / block only — no rail supplied. |
| N | Standard 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-N-H-C Is Used
Microscope focus stage overhaul
A worn carriage on a small inspection microscope's focus axis can be replaced without repositioning the whole stage, provided the pairing code on the old block matches C and the rail itself is undamaged.
Compact dispensing head refurbishment
Electronics assembly lines running miniature fluid dispensers can fit this high accuracy block to restore smooth travel on a 12 mm LRM rail, avoiding replacement of the complete guide.
Benchtop test fixture upgrade
When building a small optical or sensor test fixture, ordering the carriage and rail separately lets you match an existing rail and keep a spare block for quick swaps.
Is the Airtac LRM Miniature Linear Guide LRM12BK-N-H-C the Right Guide?
Because LRM publishes no dynamic, static or moment ratings, this carriage cannot be sized from a table. If your load is substantial or cantilevered, step up to the LSH series, which publishes per-carriage dynamic, static and moment ratings you can size against. For short travel where crossed-roller rigidity matters more than stroke, look across at LGC. Before ordering: confirm this is a carriage-only purchase, match pairing code C to your existing rail, check rail width (12 mm), carriage length (standard), accuracy grade (H), and send us the load case by RFQ so we confirm the rating. We list only four carriage-only SKUs, all pairing code C, so most carriage replacements are a special order.
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-N-H-C FAQ
It is a standard-length carriage for a 12 mm wide LRM rail, in high accuracy grade H, with pairing code C which must match the code on your rail. Lubrication is Kyodo Yushi PS No. 2 from the factory; re-grease through the rear hole every 100 km of travel or every 3 to 6 months, and never mix lubricant types. The ambient temperature limit is 80 C with transient peaks to 100 C. For mounting screws, M2 torque is 58.8 N.cm into steel, 39.2 into cast iron and 29.4 into aluminium, and M3 is 196, 127 and 98 N.cm respectively. Load and moment ratings are not published for LRM; we confirm them per model before ordering.
No. The BK in the code means carriage only - there is no rail in the box, and carriage-only codes carry no preload position either. The pairing code C tells you which rail this block was matched to; rails and carriages must share the same code, so read it off your original part before ordering. We list only a handful of carriage-only SKUs, so if your code differs this becomes 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-N-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.