
The AirTAC Airtac LSH Linear Guide Rail LSH30HN2X3180T3180AH-M6 is a standard-type profile linear guide on a 28 mm wide rail. Four rows of balls contact X-shaped raceways at a 45° angle, so the guide carries load equally in all four directions and absorbs small mounting errors inside the carriage instead of binding.
The LSH30HN2X3180T3180AH-M6 is a complete LSH30 guide set whose rail comes in two matched 3180 mm sections, joined end to end and held with bottom-lock (T) mounting rather than top screws. Two square standard carriages ride the joined track. The high accuracy grade tightens running parallelism to a 7-28 um band, and because the rail is clamped from below there are no bolt heads or plastic caps standing on the top face - one less path for swarf to reach the ball circuit. True rail width is 28 mm; the 30 in the code is the series size.
Splicing is what makes this length possible: a single size 30 rail stops at 4030 mm, but two joined sections give roughly 6360 mm of continuous travel. Each standard carriage still carries the full catalogue rating of 37.4 kN dynamic and 55.0 kN static with moment limits of 0.66 to 0.67 kN.m. On a build of this kind, checking that the two sections sit flush on the same datum matters more than anything else - the H grade accuracy is only as good as the seat under the joint.
| Model | Airtac LSH Linear Guide Rail LSH30HN2X3180T3180AH-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Complete guide set |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH30 |
| Rail width | 28 mm (the size code is not the rail width above size 20) |
| Carriage style | Square (compact) |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 3180 mm (spliced sections) |
| Basic dynamic load rating C | 37.4 kN per carriage |
|---|---|
| Basic static load rating C0 | 55.0 kN per carriage |
| Allowable static moment | MR 0.66 / MP 0.67 / My 0.67 kN·m |
| Accuracy grade | H — high grade |
| Preload grade | A — no preload |
| Mounting screws | M8 — 3040 N·cm into steel, 2010 cast iron, 1470 aluminium |
| Lubrication | Pre-filled with Mobilux EP2; re-grease every 100 km of travel or every 3–6 months |
| Interchangeability | LSH carriages fit LSH rails of the same model |
Specifications follow the official AirTAC LSH catalogue. The catalogue page does not state the carriage or rail base material. Sizes 35 and 45 exist in the catalogue but are not stocked here; they are available to order.
| LSH | LSH Series Linear Guide. |
|---|---|
| 30 | Size code — note the rail is 28 mm wide, not 30 mm. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| 2X3180 | 2 carriages on a 3180 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| A | A — no preload — higher preload raises rigidity and tightens how flat the mounting surface must be. |
| H | H — high grade. |
| -M4 / -M6 / -A01… | Grease nipple or tube-fitting type. Restricted by size: size 15 the M4 family, 20–35 the M6 family, 45 the PT1/8 family. |
| This order | Complete guide set |
|---|---|
| Rail | Yes, 3180 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.
A long measuring axis riding a granite surface plate: grade H parallelism of 7-28 um suits a probe carrier, and the bottom-lock mounting keeps the rail top face clear for a clean optical path.
A tote shuttle travelling roughly six metres between rack faces on the joined rail; splicing two 3180 mm sections is the only route past the 4030 mm single-rail limit at this size.
An aluminium extrusion line where a flying cut-off tracks the extruded profile; the long joined rail covers the pull length and the M6 fitting supports regular re-greasing on a demanding duty cycle.
Grade H buys the 7-28 um parallelism band but demands a better seat: keep the mounting-surface corner radius at or under 1 mm, shim carefully at the splice, and torque every M8 screw to spec (3040, 2010 or 1470 N.cm on steel, cast iron and aluminium). If that accuracy is overkill, the same geometry exists in grade N at lower cost; if the moment is the constraint, move to a long carriage (MR 0.88 kN.m) or up to LSH35 (1.05 kN.m). Light-duty small envelopes fit LRM better - its ratings are unpublished, so we confirm them - and short-travel axes needing crossed-roller stiffness suit LGC instead. Before ordering, check: form, size by load and moment, carriage style and length, count and joined rail length, grade H with preload A, M6 fitting, and the pairing code if you are replacing a single part.
Quick checklist
Each standard LSH30 carriage carries 37.4 kN basic dynamic (C) and 55.0 kN basic static (C0), with allowable static moments of 0.66 kN.m (MR), 0.67 kN.m (MP) and 0.67 kN.m (My). Grade H running parallelism spans 7-28 um depending on rail length. Mount the sections with M8 screws at 3040, 2010 or 1470 N.cm in steel, cast iron and aluminium respectively. Grease per carriage: 5.4 cm3 first charge, 1.7 cm3 top-up, refreshed every 100 km of travel or every 3 to 6 months, whichever comes first.
The code X3180T3180 marks a spliced rail: two 3180 mm sections supplied to be joined end to end into roughly 6360 mm of continuous travel, with bottom-lock (T) mounting. Everything else is standard complete-set content - rail plus two square carriages, no separate parts to source. During installation, verify that the joined faces sit flush on the same datum before final torquing; the achieved H grade accuracy depends heavily on whether the rail is pulled flat against its seat and the splice is correct.
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