Airtac LRM Miniature Linear Guide LRM12L1X420S10BH
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X420S10BH 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 length420 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 LRM12L1X420S10BH
The LRM12L1X420S10BH is a complete 12 mm miniature linear guide set: a 420 mm stainless-steel rail mounted from the top, with a single long carriage factory-fitted with light preload (grade B) and built to accuracy grade H. Light preload removes most of the running clearance you get with grade A, tightening the feel of the slide without pushing into the drag and fit demands of a medium preload.
Grade B is the pragmatic middle choice on this series - LRM offers nothing heavier than medium (C) - and it calms the settle and rattle a clearance fit can show on a table that reverses direction often. The long carriage engages more balls over a longer span, the Japanese ISO 3290 G10 balls (a grade applying to the balls only) run in a double-lip sealed circuit behind an outer cover, and the common rail accepts other LRM12 carriages on the same profile. Keep the surroundings at or below 80 C, with transient peaks to 100 C, and re-grease every 100 km of travel or 3 to 6 months. Load and moment ratings are not published for this series; the figure for your specific model is confirmed before ordering - start with an RFQ.
Airtac LRM Miniature Linear Guide LRM12L1X420S10BH Technical Specifications
| Model | Airtac LRM Miniature Linear Guide LRM12L1X420S10BH |
|---|---|
| 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 | 420 mm |
| 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 LRM12L1X420S10BH
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X420 | 1 carriage on a 420 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, 420 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 LRM12L1X420S10BH Is Used
Vision sorter scanning head
A camera head sweeping repeatedly over a parts tray benefits from the lightly preloaded carriage, which settles at each end of the sweep without the visible overshoot a clearance fit can show.
Compact screwdriver cell
A small fastener-driving cell that shuttles between drive positions uses the light preload to stop the head nodding as the driver seats each screw.
Mini gantry for sensor QA
A two-rail mini gantry carrying an inspection sensor over small castings stays predictable in reverse because grade B preload takes out the clearance a plain carriage would leave.
Is the Airtac LRM Miniature Linear Guide LRM12L1X420S10BH the Right Guide?
Pick grade B preload when reversing motion shows end-play with a clearance carriage but you do not want the tighter fit and greater running drag of grade C. Long carriages are stocked as deeply as standard ones - 512 against 475 SKUs - so this specification costs nothing in availability. If the load is genuinely substantial or overhung, LSH is the right sizing tool, because it publishes dynamic, static and moment ratings per carriage that LRM deliberately does not; for short, stiff duty between rails, LGC's crossed rollers win. Checklist: complete set form, 12 mm rail width, long carriage, one block, 420 mm rail, preload B, accuracy H, top-mount, plus a confirmed per-model load rating from us.
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 LRM12L1X420S10BH FAQ
In one place: 12 mm rail width, 420 mm rail length, one long carriage, preload B (light), accuracy grade H, top-mount rail. Fixing torque: 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. Ambient temperature limit 80 C with 100 C transient peaks. Re-grease every 100 km of travel or every 3 to 6 months - on a short-stroke machine cycling continuously, the distance usually binds first. Load and moment ratings are not published for LRM; we confirm the rating for this exact model through the RFQ.
Grade B applies a light elastic preload that removes most of the running clearance a grade A carriage leaves, giving a firmer, less rattly feel when the slide reverses. The trade-offs are slightly more running drag and a greater sensitivity to mounting-surface quality, so the mating face should be ground or finish-milled. LRM tops out at grade C (medium) - there is no heavy grade. Preload is not a load rating: the capacity of this specific model is confirmed with us before you 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 LRM12L1X420S10BH
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.