Airtac LSH Linear Guide Rail LSH20HN2X340S20AH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HN2X340S20AH-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 length340 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 LSH20HN2X340S20AH-M6
This SKU, LSH20HN2X340S20AH-M6, is a complete LSH linear guide set: one 340 mm profile rail with two square (compact H) carriages of standard length already running on it, an S20 end-hole offset, and an M6 lubrication point on each block. Four rows of recirculating balls sit in X-shaped arc raceways touched at a 45 degree contact angle, so push, pull, lift and side loads all meet the same rating, and slight mounting-surface error is absorbed inside the carriage instead of binding the slide. Size 20 here means a true rail width of 20 mm.
Accuracy grade H gives a running parallelism band of 7-28 um over the rail, tighter than the N grade on the same section. Each square carriage is rated 18.6 kN basic dynamic, 28.6 kN basic static and 0.27 kN.m MR, and the pair on one rail keeps a carried part from tipping along the travel. With preload A (none) this set tolerates a height error of up to 130 um at 500 mm rail spacing - step to preload C and that allowance collapses to 50 um, so on milled rather than ground seats, no preload is the pragmatic choice.
Airtac LSH Linear Guide Rail LSH20HN2X340S20AH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HN2X340S20AH-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 | 340 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 LSH20HN2X340S20AH-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. |
| 2X340 | 2 carriages on a 340 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, 340 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 LSH20HN2X340S20AH-M6 Is Used
Signage CNC router gantry
Two LSH20 blocks per rail carry a milling spindle across a 340 mm Y-axis on an aluminium sign router. Preload A keeps the build tolerant of a milled bed, while H grade holds the rail-to-rail parallelism the edge finish depends on.
Optical inspection camera slide
A benchtop vision system moves its camera along this 340 mm H-grade rail; the 7-28 um running parallelism band keeps focus drift out of repeated measurements taken at different positions along the stroke.
Pick-and-place head guide
On a small electronics assembler, two square blocks share the vertical load of a vacuum pick head and stop it nodding at either end of the 340 mm travel, protecting placement repeatability.
Is the Airtac LSH Linear Guide Rail LSH20HN2X340S20AH-M6 the Right Guide?
Start with the form: this code is a complete set, so the rail and both carriages arrive together and nothing needs pairing. Then size against both numbers - load and moment. Each standard square carriage offers C 18.6 kN and MR 0.27 kN.m; for a cantilever, note that the long LSH20 carriage raises MR to 0.35 kN.m (about 30 percent) while C gains only 19 percent, and one step up to LSH25 N lifts MR to 0.44 kN.m for a single part.
If the duty is light and the envelope small, AirTAC's LRM miniature series is the step down - its load ratings are not published in this catalogue, so we confirm them on request. If the travel is short and you want crossed-roller rigidity more than recirculating travel, compare LGC. Order checklist: form, size by load AND moment, carriage style and length, block count and rail length, accuracy grade (H here, 7-28 um band) and preload against the tolerance you can hold, grease fitting, and - only if replacing parts - 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 LSH20HN2X340S20AH-M6 FAQ
Each of the two standard-length square carriages is rated C 18.6 kN dynamic, C0 28.6 kN static, with allowable moments MR 0.27, MP 0.25 and My 0.25 kN.m. H-grade running parallelism spans 7-28 um over the rail. Fix the 340 mm rail with M5 screws torqued to 882 N.cm in steel, 588 N.cm in cast iron or 441 N.cm in aluminium; mounting shoulder H is 4.3 mm and the mating corner radius must stay at or below 0.5 mm. Every carriage comes filled with 1.8 cm3 of Mobilux EP2; top up 0.6 cm3 every 100 km of travel or every 3 to 6 months.
This set is ordered with preload A - none - the forgiving choice: at 500 mm rail spacing the catalogue allows a height error S of 130 um and a parallelism error P of 25 um between the mating faces. Preload B tightens that to S 85 / P 20 um and preload C to S 50 / P 18 um, and the allowances shrink in proportion as your actual spacing exceeds 500 mm. Note that preload D does not exist in size 20 at all - A, B and C are the entire menu. Choose B or C only when you can machine and inspect the seats to match; otherwise the extra rigidity is bought with binding risk.
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Standard models are processed and dispatched in 3-5 business days.
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