Airtac LSH Linear Guide Rail LSH20RLX4000-H-E
The AirTAC Airtac LSH Linear Guide Rail LSH20RLX4000-H-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 length4000 mm
- 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 LSH20RLX4000-H-E
One 4000 mm length of AirTAC LSH20 profile rail in high accuracy grade, and nothing else: this is a rail-only SKU, so the recirculating ball carriage is a separate order. Four ground raceways angle the ball contacts at 45 degrees, giving equal capacity in all four load directions once a carriage is fitted, with self-alignment that takes up small mounting errors within the published tolerances. Size code 20 corresponds to a true rail width of 20 mm.
High grade holds running parallelism to 7-28 um across the grade's length band, tightened from normal grade's 12-37 um, which is why it is asked for when straightness shows in the finished part. The 4000 mm cut sits 40 mm inside the 4040 mm Lmax for size 20, effectively the top of the catalogue range, so plan the base surface to match. Mounting is top-lock and the pairing code is E; any LSH20 carriage marked E will run on it.
Airtac LSH Linear Guide Rail LSH20RLX4000-H-E Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20RLX4000-H-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 | 4000 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 |
| 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 LSH20RLX4000-H-E
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| RL | Rail only — no carriage supplied. |
| 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, 4000 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 LSH20RLX4000-H-E Is Used
Gantry rails under a full-sheet CNC router
Lay two 4000 mm H grade rails under a woodworking router bridge: the 7-28 um parallelism band keeps the gantry straight over the full sweep of a 1220 x 2440 mm sheet.
Cutting bridge for plasma or knife tables
Run the cutting carriage across a full sheet with margin to spare; the H grade limits gantry yaw so the cut stays parallel to the datum edge over the whole 4 m.
Four-metre marking and laser projection frame
Guide a marking head across wide extrusions, skins or panels, where a normal rail's wider parallelism spread would print into the marked line.
Is the Airtac LSH Linear Guide Rail LSH20RLX4000-H-E the Right Guide?
Specify H grade when straightness feeds finished part quality and the normal grade's 12-37 um band is too loose. Where the load is light and the machine small, LRM is the leaner route, but its ratings are unpublished and we verify them case by case. Where the stroke is short and crossed-roller stiffness beats a long ball run, LGC is the cross-over. Sizing note: the rail carries no capacity figures - pick the E-coded carriage by load and moment, and remember a long LSH20 block raises the moment rating about 30 percent (0.27 to 0.35 kN.m) against roughly 19 percent more dynamic capacity, so for a cantilever the long block usually decides the size. Checklist: rail only, size 20, 4000 mm, H grade, pairing E, top-lock mounting, carriage chosen next.
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 LSH20RLX4000-H-E FAQ
No load, moment or preload figure belongs to the rail - those are properties of the LSH20 carriage paired to it. The rail is 20 mm wide, high grade running parallelism is 7-28 um, length is 4000 mm against a size 20 Lmax of 4040 mm. Mounting uses M5 screws at 882 N.cm in steel, 588 N.cm in cast iron, 441 N.cm in aluminium; shoulders H 4.3, H1 3.5, H2 5 mm; corner radius 0.5 mm maximum. Pairing code E, top-lock holes.
One 4000 mm LSH20 rail in high accuracy grade, with top-lock mounting holes - no carriage, no preload, no grease nipple and no grease charge, since none of those exist on a rail-only code. To finish the axis, order an LSH20 carriage with the pairing letter E; the letter is how AirTAC ties a given block to a given rail for smoothness and accuracy. If you are replacing one rail of a pair, check the letter on the surviving rail so both sides still match.
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 LSH20RLX4000-H-E
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