Airtac LSH Linear Guide Rail LSH20HN2X400S20AH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN2X400S20AH-M6 is a standard-type profile linear guide on a 20 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
- SizeLSH20
- Rail width20 mm
- Carriage lengthStandard carriage
- Carriages2
- 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 LSH20HN2X400S20AH-M6
This listing is a complete AirTAC LSH20 linear guide set: one 400 mm profile rail carrying two square (compact) carriages of standard length, each fitted with an M6 grease point. Both carriages run on four rows of balls seated in X-shaped arc raceways at a 45 degree contact angle, so push, lift and side loads all meet the same rating, and slight mounting-surface error is absorbed inside the block instead of binding the travel. Size 20 runs on a true 20 mm rail width.
Per carriage the catalogue lists C 18.6 kN dynamic, C0 28.6 kN static, and moment ratings of MR 0.27, MP 0.25 and My 0.25 kN.m; the pair shares the load and resists tipping along the 400 mm travel. High accuracy grade holds running parallelism between 7 and 28 um over the rail length, and with no preload the guide tolerates up to 130 um of height error between rails at 500 mm spacing - the most forgiving build in the LSH20 range.
Airtac LSH Linear Guide Rail LSH20HN2X400S20AH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN2X400S20AH-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Square (compact) |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 400 mm |
| Basic dynamic load rating C | 18.6 kN per carriage |
|---|---|
| Basic static load rating C0 | 28.6 kN per carriage |
| Allowable static moment | MR 0.27 / MP 0.25 / My 0.25 kN·m |
| Accuracy grade | H — high grade |
| Preload grade | A — no preload |
| Mounting screws | M5 — 882 N·cm into steel, 588 cast iron, 441 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 LSH20HN2X400S20AH-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| 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. |
| 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, 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 LSH20HN2X400S20AH-M6 Is Used
Vision inspection gantry
A camera carriage traversing a 400 mm inspection span over machined housings; the H grade's 7 to 28 um running parallelism keeps the optic plane repeatable without paying for a precision-grade build.
Optics table translation stage
Moving a laser head or detector across a breadboard-mounted rail: with no preload the stage glides freely, and the 130 um installation allowance suits a drilled rather than ground mounting plate.
Laser cutting head support rail
Carrying the focus-unit carriage on a small laser cutter; the square block keeps the head low-profile and the M6 fitting makes in-place lubrication straightforward during service stops.
Is the Airtac LSH Linear Guide Rail LSH20HN2X400S20AH-M6 the Right Guide?
Size the duty on moment first, then load: the standard LSH20 carriage posts MR 0.27 kN.m, while the long version lifts that to 0.35 kN.m (about 30 percent, against only 19 percent more dynamic rating) and a step to LSH25 reaches 0.44 kN.m for one part. If the envelope is tight and the duty light, step down to the LRM series - its load ratings are not published, so we confirm them with the maker before quoting. Where travel is short and the job needs crossed-roller rigidity rather than long recirculating runs, LGC is the better comparison.
Before ordering, tick off: form (this is a complete set), size by load AND moment, carriage style and length, number of blocks and rail length, accuracy grade and preload against the installation tolerance you can actually hold, grease fitting, and the pairing code if you are matching to existing parts.
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 LSH20HN2X400S20AH-M6 FAQ
Per standard carriage: dynamic C 18.6 kN, static C0 28.6 kN, moments MR 0.27, MP 0.25, My 0.25 kN.m. High accuracy grade running parallelism is 7 to 28 um depending on rail length. Mount with M5 screws at 882 N.cm on steel, 588 on cast iron, 441 on aluminium. Each carriage ships charged with 1.8 cm3 of Mobilux EP2; top up 0.6 cm3 every 100 km of travel or every 3 to 6 months.
Yes. With preload A this set allows up to 130 um of height difference and 25 um of parallelism error between rails at 500 mm spacing, scaling with actual spacing. Self-alignment absorbs only slight error within these limits - it is not a licence to skip machining. Keep the mounting-shoulder corner radius at or under 0.5 mm, drive the supplied bolt caps fully into the rail holes so swarf stays out of the ball circuit, and torque the M5 screws correctly, because a rail not pulled flat loses most of its rated accuracy.
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 LSH20HN2X400S20AH-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.