Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6 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 asComplete guide set
- SizeLSH25
- Rail width23 mm
- Carriage lengthStandard carriage
- Carriages2
- Rail length3940 mm
- AccuracyN — normal grade
- PreloadA — no 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 LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6
The LSH25F1N2X3940T800AN-M6 is a complete size 25 AirTAC LSH guide delivered as a spliced rail: a 3940 mm section factory-joined to an 800 mm section at the T mark, giving 4740 mm of travel in total. Splicing is how the series reaches lengths beyond the 4040 mm single-piece maximum for this size. Two standard-length F1 top-flange carriages ride the rail, each with an M6 nipple and its bolt caps. Four rows of recirculating balls sit in X-crossed 45 degree arc raceways, so each block carries the same load radially in any direction and self-aligns to swallow small datum errors.
Each carriage is rated 26.9 kN dynamic C, 39.4 kN static C0 and 0.44 / 0.38 / 0.38 kN.m MR / MP / My, and the two blocks together resist tipping along nearly five metres of travel. Grade N accuracy holds running parallelism in the 12-37 um band. A practical note for a rail this long: every bolt hole needs its plastic cap driven home - seat it in the counterbore, cover with a flat plate, tap vertically with a plastic mallet and wipe the rail - because a missing or protruding cap is the classic route for swarf into the ball circuit.
Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-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 | LSH25 |
| Rail width | 23 mm (the size code is not the rail width above size 20) |
| Carriage style | Flange, top mounting |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 3940 mm (spliced sections) |
| 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 | N — normal grade |
| Preload grade | A — no preload |
| 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 |
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.
Model Code: Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| 2X3940 | 2 carriages on a 3940 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. |
| N | N — normal 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. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 3940 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.
Where the Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6 Is Used
Extrusion line cut-off carriage
A travelling cut-off saw on an extrusion line follows the product over a long stroke; the spliced 4740 mm rail gives one continuous reference where a single piece would exceed the 4040 mm length limit.
High-speed transfer gantry
A moulding-shop gantry shuttling parts between stations runs on the two F1 blocks; grease lubrication supports travel up to 60 m/min, and the 100 km regrease interval can be watched on the machine hour-meter.
Long-panel inspection scanner
A scanner bridge checking flatness across full sheet goods uses the N-grade 12-37 um parallelism band as its travel straightness reference over the whole span.
Is the Airtac LSH Linear Guide Rail LSH25F1N2X3940T800AN-M6 the Right Guide?
Order the mounting direction and handling first: a 4740 mm spliced rail needs a straight, supported base along its full run, and any section joint should sit over a support if the frame layout allows. For compact machines with light duty, LRM is the smaller alternative - its load ratings are not published, so we confirm them for your case. If a cantilevered load governs, a long LSH25 carriage lifts MR to 0.58 kN.m (about 32 percent, against a 22 percent rise in dynamic rating) or step up to LSH30 at 0.66 kN.m. Short-travel stages wanting crossed-roller stiffness belong on LGC instead. Before ordering, check: complete set form, size against load and moment, F1 flange, standard block, two blocks, spliced 3940+800 mm rail, N accuracy, preload A against your achievable mounting tolerance, M6 fitting.
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 LSH25F1N2X3940T800AN-M6 FAQ
Full figures for this size 25, standard-length carriage: dynamic load rating C 26.9 kN; static C0 39.4 kN; allowable moments MR 0.44 kN.m, MP 0.38 kN.m, My 0.38 kN.m. Accuracy N means running parallelism within 12-37 um depending on position. Fixing: M6 screws at 1370 N.cm on steel, 921 on cast iron, 686 on aluminium. Per carriage, lubrication is 3.6 cm3 Mobilux EP2 at first charge and 1.1 cm3 top-ups every 100 km of travel or every 3 to 6 months.
Everything that makes a working guide is in this order: the 4740 mm spliced rail (3940 mm plus 800 mm sections joined at the factory T joint), two F1 top-flange carriages with M6 nipples, and the plastic caps for the mounting holes. It is not a carriage-only or rail-only part. If you later need a spare block, order carriage-only by the pairing code marked on the original parts - that code ties a carriage to its rail's accuracy and preload behaviour; without it a replacement may not run identically. On a spliced rail, record which section each block runs over as well.
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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 LSH25F1N2X3940T800AN-M6
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