Airtac LSH Linear Guide Rail LSH15HN2X1240S20AH-M4
The AirTAC Airtac LSH Linear Guide Rail LSH15HN2X1240S20AH-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
- 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 LSH15HN2X1240S20AH-M4
LSH15HN2X1240S20AH-M4 pairs high accuracy grade (H) with no preload (A) - two separate choices in the AirTAC code that are worth keeping separate. The set is two square standard carriages on one 1240 mm rail, 20 mm end-hole offset, M4 grease fitting; size 15 means a true 15 mm rail width. Four rows of recirculating balls in X-shaped 45 degree arc raceways give each carriage equal load capacity up, down and sideways, and the self-aligning geometry absorbs small mounting-surface errors inside the carriage instead of loading the block.
H grade holds running parallelism to 7-28 um across the rail length while preload A keeps the widest installation window: 130 um allowable height error and 25 um parallel error between rails at 500 mm spacing, against 85 and 18 um at light preload. Per-carriage ratings are 11.3 kN dynamic, 17.9 kN static and 0.12 kN.m moment in MR, MP and My. There is also room to grow: Lmax for size 15 is 4040 mm, so this 1240 mm rail leaves nearly 2800 mm of headroom if the machine is later extended - carriages stay interchangeable across rails of the same model.
Airtac LSH Linear Guide Rail LSH15HN2X1240S20AH-M4 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH15HN2X1240S20AH-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 | A — no 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 LSH15HN2X1240S20AH-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. |
| 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, 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 LSH15HN2X1240S20AH-M4 Is Used
Pick-and-place bridge axis
A light pick-and-place bridge for small electronic assemblies: preload A minimizes drag so the axis reaches speed quickly with a modest motor, grease lubrication is good for up to 60 m/min, and H grade keeps the gripper path repeatable.
Coding head traverse
An inkjet or laser coder riding a rail beside a food or pharma conveyor, traversed to reach the print area for servicing: the unpreloaded carriages slide by hand for changeover, and the moment rating carries the cantilevered head.
Bench CNC mill retrofit
Converting a bench-top mill from round shaft and bushings to profile rail: the self-aligning carriages forgive a milled aluminium saddle, M4 mounting suits thin bases, and 11.3 kN dynamic rating per carriage covers light milling cuts.
Is the Airtac LSH Linear Guide Rail LSH15HN2X1240S20AH-M4 the Right Guide?
Speed and low drag are the case for preload A here: grease lubrication suits running speeds up to 60 m/min, and without preload the carriage glides with the least resistance. Downsize to LRM for light duty in a small envelope (its ratings are unpublished - we confirm them against your duty), and step to LSH20 when the moment rating, not 11.3 kN of dynamic capacity, becomes the limit. LGC answers short-stroke needs that want crossed-roller rigidity. Work the checklist: form (set, carriage or rail), size against load and moment, carriage style and length, count and rail length, accuracy grade and preload with the mounting-tolerance trade-off, grease fitting, and the pairing code off the original part if you are replacing.
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 LSH15HN2X1240S20AH-M4 FAQ
Ratings per standard carriage: dynamic C 11.3 kN, static C0 17.9 kN, static moments MR 0.12 / MP 0.12 / My 0.12 kN.m. High accuracy grade (H) running parallelism: 7-28 um over the rail length. Mounting: M4 screws, torque 412 N.cm steel / 274 N.cm cast iron / 206 N.cm aluminium, shoulder corner radius max 0.5 mm. Grease: Mobilux EP2 pre-filled at 0.9 cm3 per carriage, 0.3 cm3 top-ups through the M4 fitting, interval every 100 km of travel or every 3 to 6 months, whichever arrives first.
Because accuracy and rigidity are separate levers. The H grade alone gives 7-28 um running parallelism; preload A keeps drag low for fast, light strokes and preserves the widest mounting tolerance - 130 um height and 25 um parallel error at 500 mm rail spacing. Adding preload B would stiffen the guide but cut those allowances to 85 and 18 um, and medium (C) to 35 and 13 um; preload D does not exist on size 15. Whichever you pick, the rail must be seated flat against its datum and torqued correctly, and corner radii must stay at or under 0.5 mm, or the achieved accuracy falls short of the grade.
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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 LSH15HN2X1240S20AH-M4
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