Airtac LSH Linear Guide Rail LSH15HN2X1240S20BH-M4
The AirTAC Airtac LSH Linear Guide Rail LSH15HN2X1240S20BH-M4 is a standard-type profile linear guide on a 15 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
- SizeLSH15
- Rail width15 mm
- Carriage lengthStandard carriage
- Carriages2
- Rail length1240 mm
- AccuracyH — high 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 LSH15HN2X1240S20BH-M4
Complete and matched, boxed as one kit: the LSH15HN2X1240S20BH-M4 is a 1240 mm AirTAC LSH profile rail carrying two square compact carriages of standard length, specified with light preload, high accuracy grade and an M4 side grease nipple on each block. No second order is needed to build an axis. Inside every carriage, four rows of recirculating balls sit in X-arranged arc raceways cut at 45 degrees, two contact points per ball, so capacity is equal whichever way the load arrives and small machining errors in the mounting face are taken up inside the block instead of showing up as stiff spots. Size 15 here has a true rail width of 15 mm, so the size code and the mounting width agree.
Catalogue figures per carriage: dynamic C 11.3 kN, static C0 17.9 kN and moment ratings of 0.12 kN.m in MR, MP and My; the H grade holds running parallelism within a 7-28 um band over this rail length. The light preload earns its keep on a vision or metrology axis, but it costs installation latitude: with blocks 500 mm apart the permitted height error S falls from 130 um to 85 um against an unloaded rail, so the datum face and the M4 screw torque deserve real attention. Two carriages on one rail share the vertical load and resist tipping along the travel.
Airtac LSH Linear Guide Rail LSH15HN2X1240S20BH-M4 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH15HN2X1240S20BH-M4 |
|---|---|
| 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 | LSH15 |
| Rail width | 15 mm |
| Carriage style | Square (compact) |
| Carriage length | Standard carriage |
| Carriages supplied | 2 |
| Rail length | 1240 mm |
| Basic dynamic load rating C | 11.3 kN per carriage |
|---|---|
| Basic static load rating C0 | 17.9 kN per carriage |
| Allowable static moment | MR 0.12 / MP 0.12 / My 0.12 kN·m |
| Accuracy grade | H — high grade |
| Preload grade | B — light preload |
| Mounting screws | M4 — 412 N·cm into steel, 274 cast iron, 206 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 LSH15HN2X1240S20BH-M4
| LSH | LSH Series Linear Guide. |
|---|---|
| 15 | Size code. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| 2X1240 | 2 carriages on a 1240 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. |
| 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, 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 LSH15HN2X1240S20BH-M4 Is Used
PCB vision inspection stage
A camera head travelling 1.1 m over populated circuit boards needs straightness it can calibrate to. The H grade holds the 7-28 um parallelism band and the light preload removes rattle without demanding precision-grade datums.
Laser marking gantry rail
Focus drift from guide wobble shows up immediately as uneven engraving depth. Two preloaded square blocks on one 1240 mm rail keep the beam head tracked, and the M4 nipples reach the grease path from the side.
Laboratory sample handling robot
A pipetting head shuttling microplates along a benchtop axis repeats only as well as its guide. Equal four-direction capacity lets the block take vertical, side and moment loads from the arm without a second support rail.
Is the Airtac LSH Linear Guide Rail LSH15HN2X1240S20BH-M4 the Right Guide?
Decide by moment first, load second. If the peak moment at the block stays under 0.12 kN.m and the duty is light with a tight envelope, step down to AirTAC LRM - its ratings are not published in the LSH table, so we confirm them by RFQ before you commit. When the travel is short and the job wants crossed-roller stiffness rather than long recirculating running, LGC is the closer relative. When moment governs, a long carriage on this same rail or one step up to LSH20 (MR 0.27 kN.m, a 125 percent jump) buys more than adding blocks along the rail.
Match checklist before ordering: form (this is a complete set, rail and both blocks together), size chosen on load and moment, square standard carriage, two blocks, 1240 mm rail, H accuracy with B preload and the tighter mounting tolerances that implies, M4 fitting to suit the size 15 family. Spliced rails and other lengths are available to order.
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 LSH15HN2X1240S20BH-M4 FAQ
Per carriage: dynamic C 11.3 kN, static C0 17.9 kN, moments MR 0.12, MP 0.12 and My 0.12 kN.m. H grade running parallelism spans 7-28 um by rail length. Rail screws are M4 at 412, 274 and 206 N.cm into steel, cast iron and aluminium. Grease with Mobilux EP2 or equivalent: 0.9 cm3 first charge, 0.3 cm3 top-ups, every 100 km of travel or every 3 to 6 months.
Preload B stiffens the guide by removing internal play, and it narrows what the self-aligning feature can absorb. At 500 mm rail spacing, allowable parallelism error P drops from 25 um to 18 um and allowable height error S from 130 um to 85 um, scaled to your actual spacing. The catalogue cautions that self-alignment covers only slight error, so machine or shim the datum face to those figures before bolting down.
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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 LSH15HN2X1240S20BH-M4
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