Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E
The AirTAC Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E is a standard-type profile linear guide on a 23 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.
- SeriesLSH
- Supplied asRail only
- SizeLSH25
- Rail width23 mm
- Rail length1780 mm
- 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 LSH Linear Guide Rail LSH25RLX1780-S20-H-E
A single 1780 mm LSH25 profile rail, high accuracy grade H, mounting holes starting 20 mm from each end - this SKU is the rail and only the rail. There is no carriage in the box, so no dynamic or static rating and no preload are stated; ratings belong to the block that runs on the track. The hardened raceway surface along the rail's length is what the carriage's four rows of balls contact at 45 degrees, the arrangement behind the system's balanced four-direction capacity and self-alignment. True rail width for size 25 is 23 mm - not 25 - so a seat laid out from the size code alone ends up 2 mm out.
At 1780 mm this is a long single piece, sitting under half of the 4040 mm Lmax for size 25; runs longer than that are built by splicing two rail sections end to end. Grade H gives 7-28 um running parallelism over the length band. On a long rail, flat seating matters more than anywhere else: M6 screws at 1370 N.cm in steel, 921 in cast iron, 686 in aluminium, with every bolt pulled down or the grade is lost.
Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Rail only |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH25 |
| Rail width | 23 mm (the size code is not the rail width above size 20) |
| Rail length | 1780 mm |
| Basic dynamic load rating C | 26.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 39.4 kN per carriage |
| Allowable static moment | MR 0.44 / MP 0.38 / My 0.38 kN·m |
| Accuracy grade | H — high grade |
| Mounting screws | M6 — 1370 N·cm into steel, 921 cast iron, 686 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, matched by the pairing code |
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. This item is a rail only. Order a complete set if you also need a carriage.
Model Code: Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| RL | Rail only — no carriage supplied. |
| H | H — high grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -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. |
What Is In The Box
| This order | Rail only |
|---|---|
| Rail | Yes, 1780 mm |
| Carriage | No — not supplied with this item |
This is a bare rail cut to length. NO CARRIAGE 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 LSH Linear Guide Rail LSH25RLX1780-S20-H-E Is Used
Flatbed cutter long axis
A large-format flatbed knife cutter's gantry travels a 1780 mm Y-axis; this grade H rail keeps the cut line straight over the full sheet width at 7-28 um parallelism.
Panel saw beam slide
A beam saw's fence-side support slide carries sheet material on code E carriages over this 1780 mm rail, replacing a dented original without touching the carriages.
Inspection gantry for battery trays
A vision station that scans EV battery modules for weld straightness moves its camera bar on this long grade H rail, where local distortion in a shorter or lower-grade rail would show up as scan error.
Is the Airtac LSH Linear Guide Rail LSH25RLX1780-S20-H-E the Right Guide?
Three directions to weigh. Down: if the load is modest and space scarce, the smaller LRM series often fits - its ratings are not published, so we verify them with you. Across: for short travel where crossed-roller stiffness beats long recirculating travel, LGC is the alternative. Up: if the moment on the carriage governs, a long carriage or the next size raises moment capacity faster than an extra carriage solves tipping. Then run the checklist - form, size by load AND moment, carriage style and length, carriage count, rail length, accuracy and preload with the mounting tolerance they demand, carriage grease fitting, and the E pairing code shared by both halves.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Worst-case moment, not just straight load
- ✓ 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 LSH Linear Guide Rail LSH25RLX1780-S20-H-E FAQ
Length 1780 mm; grade H, 7-28 um running parallelism over the band; holes offset 20 mm from each end; maximum single-piece length for size 25 is 4040 mm. Mounting screws M6: 1370 N.cm steel, 921 N.cm cast iron, 686 N.cm aluminium. Shoulders H 6.5, H1 5, H2 5 mm, corner radius 1 mm max. Rail carries no load rating, preload or lubrication figure - those belong to the paired carriage.
It is not. The delivery is one 1780 mm grade H rail, no carriage, no machining beyond the standard hole pattern. The pairing letter E ties this rail to carriages of the same code: only an E-coded carriage is matched to this rail's accuracy class. If you are renewing one half of an installed pair, take the full code off the old part - mixing letters across parts is the most common cause of a rough or loose-feeling guide after repair.
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 LSH Linear Guide Rail LSH25RLX1780-S20-H-E
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.