
The AirTAC Airtac LRM Miniature Linear Guide LRM12L1X170S10BPT 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.
This code reads differently from the free-running sets beside it: LRM12L1X170S10BPT carries preload B (light) together with accuracy P (precision), in a bottom-mount rail format. The 12 mm stainless-steel rail runs 170 mm and carries one long recirculating-ball carriage, with fixing screws driven from below so the top of the rail stays clear. Light preload takes up internal play so the carriage feels firmer under side loads, at the cost of slightly more running drag than grade A.
Pairing light preload with the precision accuracy grade makes this the tightest-spec set in this small family: less play, tighter travel tolerances, and a flush outer face. The recirculating balls are Japanese made to ISO 3290 G10 - a grade for the balls only, not for the assembly - and the double-lip seal plus outer cover guard lubricant and cleanliness. Ambient temperature must not exceed 80 C, with transient peaks to 100 C. Load and moment ratings are not published for LRM; send the RFQ and we confirm the figures for this exact model before ordering.
| Model | Airtac LRM Miniature Linear Guide LRM12L1X170S10BPT |
|---|---|
| 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 | 170 mm (spliced sections) |
| Load & moment ratings | Not published for this series — ask us to confirm for your model |
|---|---|
| Accuracy grade | P — precision 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.
| LRM | LRM Series Miniature Linear Guide. |
|---|---|
| 12 | Size code. |
| L | Long carriage. |
| 1X170 | 1 carriage on a 170 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. |
| P | P — precision grade. |
| This order | Complete guide set |
|---|---|
| Rail | Yes, 170 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.
A compact glue or solder-paste head cycling over a short stroke; light preload removes the play that would blur dot placement.
A sliding interlock panel on a small laser enclosure; bottom-mount fixing keeps the outer face flat, clean and unobstructed.
A carriage carrying connector blocks along a harness test rig; the long carriage keeps the block stable as leads are seated.
Choose preload B over A when the axis must not have free play - a head that must return to position, a stage that must not drift - and accept a little extra drag in exchange. Reserve preload C for when you need the most rigid, least forgiving running of the three. Beyond preload: step up to AirTAC LSH for substantial or cantilevered loads, where LSH's published per-carriage dynamic, static and moment ratings let you calculate properly; step across to LGC for short travel needing crossed-roller rigidity. This SKU's checklist: complete set, 12 mm rail width, long carriage, one block, 170 mm rail, preload B, accuracy P, bottom-mount fixing - and a load rating confirmed with us before you order.
Quick checklist
Rail width 12 mm; rail length 170 mm; one long carriage; preload B (light); accuracy P (precision); bottom-mount fixing with screws from below; ambient limit 80 C with peaks to 100 C. Grease at dispatch is Kyodo Yushi PS No. 2, topped up through the rear lubrication hole every 100 km of travel or every 3 to 6 months. M3 screws torque to 196 N.cm in steel, 127 in cast iron and 98 in aluminium (M2: 58.8 / 39.2 / 29.4 N.cm). Load and moment ratings are not published for LRM; we confirm them per model - ask before ordering.
You receive a complete set - the 170 mm stainless-steel rail and one long carriage running on it, preloaded to grade B - not a bare carriage, so no pairing letter is involved. Spare carriages are a different story: carriage-only parts are thinly listed in this range and most are special orders, matched to your rail by the pairing code taken from the original. Even with ball retention, fitting a carriage hastily or at an angle can drop balls, so plan any swap carefully and confirm the load rating for a replacement via RFQ.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
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.