Airtac LSH Linear Guide Rail LSH25HN2X400S20AN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HN2X400S20AN-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 length400 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 LSH25HN2X400S20AN-M6
Order LSH25HN2X400S20AN-M6 and you receive a matched set, not parts: a 400 mm LSH profile rail with two square standard-length carriages mounted and run in. Every carriage holds four rows of balls on 45 degree X-pattern raceways, so down-thrust, side load and overturning moment all draw on the same capacity, and small flatness errors in the machine base are taken up inside the block. The size code says 25 but the rail top face is 23 mm across.
The A code leaves the balls unloaded for maximum mounting latitude: allowable height error at 500 mm spacing is 130 um. Per-carriage figures are 26.9 kN dynamic and 39.4 kN static - static runs roughly 1.5 times dynamic across this range, so size on C, not C0, when travel life matters. Moment limits are 0.44 / 0.38 / 0.38 kN.m per block.
Airtac LSH Linear Guide Rail LSH25HN2X400S20AN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HN2X400S20AN-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 | 2 |
| 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 | 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 LSH25HN2X400S20AN-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. |
| 2X400 | 2 carriages 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. |
| 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, 400 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 LSH25HN2X400S20AN-M6 Is Used
Drilling jig XY table
A 400 mm axis on a shop-built XY table for repeat drilling; with no preload, the twin blocks tolerate a milled, not ground, base within the 130 um height allowance.
Packaging pusher slide
A fast reciprocating pusher on a cartoning machine; re-greasing every 100 km matters here, since a 300 mm stroke cycling once per second covers that distance in roughly two weeks.
Router sled on a hobby CNC
Replacing a worn or DIY slide on a hobby CNC router bed; the 23 mm rail and twin carriages stiffen a 400 mm span against the side loads of cutting.
Is the Airtac LSH Linear Guide Rail LSH25HN2X400S20AN-M6 the Right Guide?
This no-preload, normal-grade set is the pragmatic choice when the mounting surface is good but not precision-ground. Work the choice in both directions: step down to LRM where the payload and envelope are small - its ratings are not published, so we confirm them per enquiry - and step across to LGC when travel is short and stiffness matters more than stroke length. Go one size up, or pick a long carriage, once a cantilevered load pushes the moment past what 0.44 kN.m of MR can carry.
Checklist for this form: confirm you want the complete set rather than carriage only or rail only; size by load and by moment; carriage style and length; two blocks on a 400 mm rail; accuracy N with preload A and its generous 130 um height tolerance; M6 grease fitting; and, for part replacement, the pairing code off the original.
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 LSH25HN2X400S20AN-M6 FAQ
Per carriage, standard length: C 26.9 kN dynamic, C0 39.4 kN static, moments MR 0.44 / MP 0.38 / My 0.38 kN.m, and there are two carriages on the 400 mm rail. Normal accuracy grade parallelism sits between 12 and 37 um over this rail length. Mount with M6 screws at 1370 / 921 / 686 N.cm on steel / cast iron / aluminium, and allow 3.6 cm3 of Mobilux EP2 per carriage at first charge with 1.1 cm3 top-ups every 100 km of travel or 3 to 6 months.
A is the no-preload grade: the standard internal clearance is left in place, which maximises what the mounting surface can be forgiven. At 500 mm rail spacing the allowable height error between the two rails is 130 um and the parallelism error 30 um, both the loosest grades offered. If your application later needs zero lost motion under reversing loads, the same set exists in light preload B - but the height tolerance then tightens to 85 um.
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 LSH25HN2X400S20AN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.