Airtac LSH Linear Guide Rail LSH25HN1X400S20AH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HN1X400S20AH-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
- Carriages1
- Rail length400 mm
- AccuracyH — high 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 LSH25HN1X400S20AH-M6
A complete, ready-to-bolt axis in one code: LSH25HN1X400S20AH-M6 supplies a 400 mm profile rail 23 mm across the rail body, carrying a single square block of standard length at high accuracy grade. Four ball rows run in raceways angled at plus and minus 45 degrees, two contact points per ball, which gives the block equal capacity in every load direction and lets it swallow small seat errors rather than fight the travel.
Grade does not change strength - 26.9 kN dynamic, 39.4 kN static and 0.44 / 0.38 / 0.38 kN.m of moment per block are the same as normal grade - it changes straightness: 7-28 um of running parallelism, roughly half the drift of the N grade. That only materialises if the rail is pulled flat onto its datum and the M6 screws torqued to 1370 N.cm in steel, so treat the mounting step as part of the accuracy specification.
Airtac LSH Linear Guide Rail LSH25HN1X400S20AH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HN1X400S20AH-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 | Square (compact) |
| Carriage length | Standard carriage |
| Carriages supplied | 1 |
| Rail length | 400 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 |
| 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 LSH25HN1X400S20AH-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. |
| 1X400 | 1 carriage on a 400 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. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 400 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 LSH Linear Guide Rail LSH25HN1X400S20AH-M6 Is Used
Machine-vision camera traverse
A 400 mm camera pass over a PCB inspection line: high grade holds the lens axis to 7-28 um of running parallelism, so focus does not drift across the field.
Laser marking head rail
Traversing a marking head across a workpiece on a gantry built from milled plate; no preload keeps the installation tolerant while the H grade keeps the beam path straight.
Granite-plate measuring slide
A metrology carriage on a surface plate, where the 23 mm rail seats on dowels and the high-accuracy grade preserves the plate's own straightness through the stroke.
Is the Airtac LSH Linear Guide Rail LSH25HN1X400S20AH-M6 the Right Guide?
When the drawing specifies straightness before load, select on accuracy first: this H-grade set delivers the tighter band while staying preload-free, so it still forgives 130 um of height error across 500 mm of spacing - the practical match for a high-grade axis on a milled rather than ground base. Downsize to LRM for light duty in tight envelopes (ratings unpublished, confirmed on request); upsize to LSH30 or the long block when moment, not C, decides; across to LGC for short-travel crossed-roller rigidity. Checklist: form; size by load and moment; block style and length; count and rail length; accuracy and preload trade-off; grease fitting; and the pairing code off the original when replacing a part.
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 LSH25HN1X400S20AH-M6 FAQ
Per block: C 26.9 kN dynamic, C0 39.4 kN static, moments 0.44 (MR) and 0.38 (MP, My) kN.m, and a 7-28 um high-grade parallelism band. The 23 mm rail bolts down on M6 screws torqued to 1370 / 921 / 686 N.cm in steel / cast iron / aluminium, with corner radii at or below 1 mm. Grease: 3.6 cm3 factory charge of Mobilux EP2, 1.1 cm3 per top-up, every 100 km or every 3 to 6 months.
It is the complete set: one 400 mm rail and one square block, assembled and ready to bolt down - no separate rail or block purchase needed. The M6 fitting is on the block end face. If you later want a spare block or a longer rail, those are ordered as separate part-only SKUs matched by the pairing code read off the original part, so geometry and grade stay consistent.
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 LSH25HN1X400S20AH-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.