Airtac LSH Linear Guide Rail LSH20HN2X400S20BN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN2X400S20BN-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
- AccuracyN — normal grade
- PreloadB — light 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 LSH20HN2X400S20BN-M6
This is the complete-set form of LSH20 in light preload with normal accuracy: one 400 mm rail, two standard-length square blocks, M6 lubrication points, and a size code 20 that matches an actual 20 mm rail width. The four-row, 45 degree ball layout makes each block equally strong in all four directions and lets it self-align against minor surface imperfections in the machine bed.
The light preload tightens the guide against shock and direction changes at the cost of a tighter build: height error between rails must stay within 85 um and parallelism within 20 um, both at 500 mm spacing. Each carriage carries 18.6 kN dynamic and 28.6 kN static, so the pair handles about 37 kN shared, with a 0.27 kN.m MR moment rating per block. Normal grade running parallelism sits between 12 and 37 um.
Airtac LSH Linear Guide Rail LSH20HN2X400S20BN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN2X400S20BN-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 | N — normal grade |
| Preload grade | B — light 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 LSH20HN2X400S20BN-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. |
| B | B — light 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 LSH20HN2X400S20BN-M6 Is Used
Timber-frame CNC saw fence
A fence carriage on a beam saw takes a shock at every clamp; light preload damps the play an unpreloaded guide would leave, while normal-grade accuracy is finer than the saw cut itself.
Case conveyor diverter gate
A diverter steering cases between lanes cycles thousands of times per shift; two standard carriages share the 18.6 kN dynamic rating each, giving about 37 kN of combined capacity on the single rail.
Solar laminate stacking elevator
The lift carriage on a module laminator carries a steady vertical payload; because C0 sits near 1.5 times C, the 28.6 kN static rating per carriage is the number to check against the lifted weight.
Is the Airtac LSH Linear Guide Rail LSH20HN2X400S20BN-M6 the Right Guide?
Pick by the moment arm: with 0.27 kN.m MR per standard carriage, the long LSH20 block raises moment capacity about 30 percent (to 0.35 kN.m) while dynamic rating rises only 19 percent, and one step to LSH25 delivers 0.44 kN.m - usually cheaper than reworking the layout. Two blocks on this rail handle tipping along the travel instead. Tight envelopes with light loads suit LRM (ratings unpublished - we confirm them per enquiry); short-stroke jobs wanting crossed-roller stiffness suit LGC.
Run through: set, carriage or rail form; size from load and moment; style and length of carriage; how many blocks and how long a rail; accuracy and preload weighed against the installation tolerance you can achieve; grease fitting; and the pairing code if this replaces a worn 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 LSH20HN2X400S20BN-M6 FAQ
Per standard-length carriage: dynamic C 18.6 kN, static C0 28.6 kN (about 1.5 times C), moments MR 0.27, MP 0.25, My 0.25 kN.m. Normal grade running parallelism is 12 to 37 um depending on rail length. Fasten with M5 screws at 882 / 588 / 441 N.cm on steel, cast iron and aluminium. Each carriage leaves the factory with 1.8 cm3 of Mobilux EP2; re-grease 0.6 cm3 every 100 km of travel or every 3 to 6 months. Grease suits speeds up to 60 m/min where no cooling effect is needed.
Light preload removes internal ball play, so the guide stiffens but self-alignment has less freedom: height error between rails must stay within 85 um and parallelism within 20 um, measured at 500 mm spacing and scaling with it. Compare preload A at 130 and 25 um. Machine the datums before committing to B, keep shoulder corner radii at 0.5 mm or less, and seat the supplied bolt caps below the rail top face so debris never reaches the raceways.
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 LSH20HN2X400S20BN-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.