Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E
The AirTAC Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E 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 asRail only
- SizeLSH20
- Rail width20 mm
- Rail length240 mm
- AccuracyN — normal grade
- 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 LSH20RLX240-S20-N-E
A 240 mm stretch of LSH20 profile rail, supplied on its own: the carriage that runs on it is a separate line item, not part of this delivery. Normal accuracy grade, pairing code E, 20 mm end offset, top-lock mounting, and a true rail width of 20 mm - at size 20 the code matches the width, unlike sizes 25 and 30 where it does not, so a mounting surface laid out from the code alone is safe here.
The S20 offset puts the centre of the first fixing hole 20 mm from each rail end, so on this 240 mm length the outermost holes span 200 mm - enough for two square carriages to be bolted through their full foot pattern, which is how tipping along the travel is resisted. Running parallelism for the N grade bands 12-37 um. The maximum rail length at size 20 is 4040 mm, so this cut leaves over 3.7 m of headroom if a longer run is ever needed on the same machine frame.
Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Rail only |
| Construction | Recirculating ball, four ball rows on X-shaped raceways at a 45° contact angle, self-aligning |
| Size code | LSH20 |
| Rail width | 20 mm |
| Rail length | 240 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 |
| 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, matched by the pairing code |
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. This item is a rail only. Order a complete set if you also need a carriage.
Model Code: Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| RL | Rail only — no carriage supplied. |
| N | N — normal grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -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 | Rail only |
|---|---|
| Rail | Yes, 240 mm |
| Carriage | No — not supplied with this item |
This is a bare rail cut to length. NO CARRIAGE IS INCLUDED. 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 LSH20RLX240-S20-N-E Is Used
Laser cutter X-axis refresh
A CO2 laser cutter's X gantry rail shows wear rings under the block. Replacing the 240 mm rail like for like restores the running surface while the existing carriages, matched by pairing code E, stay in service.
Packaging line changeover spare
A vertical form-fill-seal machine's jaw slide rides a short guided axis. Holding a 240 mm spare on the spares shelf turns a damaged guide into a short changeover instead of a stopped line.
Weld cell fixture slide
A robotic weld cell's clamping fixture indexes on a short slide; this rail, top-mounted with M5 screws into a milled pocket, forms the running surface for a square carriage that carries the clamp.
Is the Airtac LSH Linear Guide Rail LSH20RLX240-S20-N-E the Right Guide?
Because this SKU is rail alone, the first check is the carriage it must carry: any LSH20 carriage shares the 20 mm rail width, but the pairing letter must match - E on both parts - and only then do smoothness, preload and accuracy carry over from the original set. If your rail is undamaged, the worn carriage is usually the economic fix at roughly a quarter of a full set's price, so confirm which half has failed first; a scored or pitted running surface means replacing this rail like for like. For lighter duties with a smaller envelope, step down to LRM (we confirm its ratings, which are not published); for short travel needing crossed-roller stiffness, step across to LGC.
Match list: form rail only, size 20, 240 mm length, S20 end offset, N accuracy, top-lock mounting, M5 fixings torqued to the figures for your base material, and pairing code E recorded off the old 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 LSH20RLX240-S20-N-E FAQ
Rail length 240 mm, end offset S20 (first hole 20 mm from each end, 200 mm outer hole span), N grade with a 12-37 um running parallelism band. Fixing: M5 screws, torqued to 882 / 588 / 441 N.cm on steel / cast iron / aluminium. Shoulder height H 4.3 mm with H1 3.5 mm and H2 5 mm; the mating surface corner radius must not exceed R 0.5 mm. Lmax for size 20 is 4040 mm. Load and moment ratings are carriage figures and appear on carriage or set pages, not here.
It is not. You receive a single 240 mm rail; the carriage is a separate purchase under an LSH20 BK code. The pairing code E ties the two halves together - rail and carriage codes must both carry E to work as a matched pair, and an LSH carriage of a given model fits any rail of that model while keeping its preload and accuracy. Order the carriage using the E code taken from your existing part.
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 LSH20RLX240-S20-N-E
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