Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-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 lengthLong carriage
- Carriages1
- Rail length1240 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 LSH20HL1X1240S20AH-M6
LSH20HL1X1240S20AH-M6 is a complete AirTAC LSH linear guide on one line: a 1240 mm hardened profile rail of size 20 with a single long square carriage mounted and matched to it. The true rail width is 20 mm, matching the size code at this end of the range. Four rows of recirculating balls run in X-arranged arc raceways cut at 45 degrees, two contact points per ball, so the carriage carries load and overturning moment equally upward, downward and sideways while absorbing slight mounting-surface error instead of binding on it.
The long carriage is what this set is bought for. At size 20 it lifts the pitch moment rating to MR 0.35 kN.m, roughly 30 percent above the 0.27 kN.m of the standard body, while dynamic C is 22.2 kN and static C0 is 37.6 kN per carriage. High accuracy grade holds running parallelism to 7-28 um across the rail length. If your load hangs off the carriage rather than sitting on it, that MR figure - not the dynamic rating - decides whether size 20 passes.
Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-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 | Long carriage |
| Carriages supplied | 1 |
| Rail length | 1240 mm |
| Basic dynamic load rating C | 22.2 kN per carriage |
|---|---|
| Basic static load rating C0 | 37.6 kN per carriage |
| Allowable static moment | MR 0.35 / MP 0.34 / My 0.34 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 LSH20HL1X1240S20AH-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. |
| L | Long carriage. |
| 1X1240 | 1 carriage on a 1240 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, 1240 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 LSH20HL1X1240S20AH-M6 Is Used
Cantilever pick on a PCB gantry
A Cartesian pick-and-place robot lifting circuit boards off-centre pitches the carriage forward; the long block's MR 0.35 kN.m absorbs that moment where a standard-length body at 0.27 kN.m would run out of rating.
Camera bridge over an inspection line
A machine-vision camera and its lighting arm ride across a 1240 mm scan window on one size 20 rail; H grade parallelism of 7-28 um keeps the focal plane steady along the travel.
Marking head on a laser engraver
The focus carriage of a CO2 laser marker traverses repeatedly; preload A keeps sliding resistance low so the belt drive does not fight the guide, and the long body steadies the head against beam-direction loads.
Is the Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-M6 the Right Guide?
Size the axis on load and moment together. Where the duty is light and the envelope tight, LRM runs smaller, but its load ratings are not published, so we confirm them against your case before recommending the swap. When MR 0.35 kN.m is marginal, moving one size to LSH25 buys MR 0.44 kN.m on the standard carriage, about 63 percent, in one part; a second carriage on this rail instead tackles tipping along the direction of travel. For short strokes where crossed-roller rigidity matters more than long recirculating travel, LGC is the other direction.
Pre-order checklist: form (this is a complete set, rail plus one long block), size chosen on load and moment, carriage style and length, block count and rail length, accuracy grade (H here) and preload (A - none), and the grease fitting, M6, which belongs to the family used on sizes 20 to 35. With no preload, installation latitude is at its widest: 25 um parallelism error and 130 um height error are allowed over 500 mm rail spacing. A pairing code only matters if you later buy spare parts separately.
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 LSH20HL1X1240S20AH-M6 FAQ
Per carriage: dynamic C 22.2 kN, static C0 37.6 kN, moment ratings MR 0.35, MP 0.34 and My 0.34 kN.m. H grade running parallelism is 7-28 um depending on rail length. Mount with M5 screws at 882 N.cm in steel, 588 N.cm in cast iron, 441 N.cm in aluminium, into shoulders with a corner radius of 0.5 mm maximum. The carriage ships charged with 2.7 cm3 of Mobilux EP2; top up 0.9 cm3 every 100 km of travel or every 3 to 6 months, whichever comes first.
Preload A is the free-moving, most forgiving grade. Over 500 mm rail spacing this size tolerates 25 um of parallelism error and 130 um of height error between the two rails; light preload tightens those to 20 and 85 um, medium to 18 and 50 um. So A saves you machining the mounting face, at the price of corner rigidity. If your structure is milled rather than ground, A is usually the honest choice.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LSH Linear Guide Rail LSH20HL1X1240S20AH-M6
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