Airtac LSH Linear Guide Rail LSH15HN2X1240S20BN-M4
The AirTAC Airtac LSH Linear Guide Rail LSH15HN2X1240S20BN-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
- AccuracyN — normal 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 LSH15HN2X1240S20BN-M4
This is the working version of the same 1240 mm kit: LSH15HN2X1240S20BN-M4 pairs a 1240 mm profile rail with two standard-length square carriages, light preload for stiffness and normal accuracy grade to keep the axis affordable. Rail and blocks arrive together as one set; nothing here is sold as separate parts. The four-row ball circuit sits at 45 degree contact angle in X-pattern raceways, giving the same rating from every load direction and enough self-alignment to forgive small flatness and height errors in the machine base. Size 15 uses a rail that really is 15 mm wide.
Numbers that matter per block: C 11.3 kN dynamic against C0 17.9 kN static - static runs about 1.6 times dynamic across this series, so size on C for travel life and treat C0 as the crash margin. Moments are 0.12 kN.m in each of MR, MP and My. Normal grade parallelism spans 12-37 um over this length, plenty for automation framing, while the B preload still trims allowable mounting error to 18 um of parallelism and 85 um of height at 500 mm spacing.
Airtac LSH Linear Guide Rail LSH15HN2X1240S20BN-M4 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH15HN2X1240S20BN-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 | N — normal 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 LSH15HN2X1240S20BN-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. |
| N | N — normal 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 LSH15HN2X1240S20BN-M4 Is Used
Electronics assembly pick-and-place retrofit
Rebuilding an ageing gantry axis is often just a new rail and blocks. Normal grade suits a component placement head, and the light preload keeps the head from knocking back at each stop-start.
Small CNC router Y-axis
Cutting side loads push a plain guide into backlash. The B preload closes that play on a 1240 mm axis, and the 0.12 kN.m moment rating per block carries a spindle mounting plate with margin.
Packaging line product pusher
Two blocks share the push load and resist tipping along the stroke. At a 300 mm stroke cycling once a second the guide reaches the 100 km grease point in roughly two weeks of running, so plan nipple access into the frame.
Is the Airtac LSH Linear Guide Rail LSH15HN2X1240S20BN-M4 the Right Guide?
For general machine building, N accuracy with light preload is usually the right trade: you gain the stiffness of a preloaded ball circuit without paying for a ground rail you will never measure to. Step down to LRM only if loads are light and space is tighter than a 15 mm rail - note LRM ratings are not published, so we confirm them against your duty before quoting. If the travel is a short, stiff shuttle rather than a long running axis, LGC crossed rollers may serve better. If moment, not load, is the binding figure, a move to LSH25 lifts MR to 0.44 kN.m outright.
Order check: set form (rail plus both blocks), size 15 by load and moment, square standard carriage, count two, rail 1240 mm, N grade, preload B with the installation tolerances it implies, M4 fitting. Replacement carriages for an existing LSH15 rail are chosen by pairing code - read it off the old block before ordering.
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 LSH15HN2X1240S20BN-M4 FAQ
Per standard square carriage: C 11.3 kN dynamic, C0 17.9 kN static, MR 0.12 / MP 0.12 / My 0.12 kN.m. N grade parallelism runs 12-37 um depending on rail length. Fixing: M4 rail screws at 412 N.cm steel, 274 cast iron, 206 aluminium. Lubrication: Mobilux EP2 or equal, 0.9 cm3 per block first fill, 0.3 cm3 top-up, refreshed every 100 km or 3 to 6 months.
Preload removes internal ball play, which stiffens the axis against reversing loads - useful on pusher and router duty. The price is tolerance: at 500 mm block spacing the permitted height error falls from 130 um on an unloaded guide to 85 um, and parallelism from 25 um to 18 um. Both scale with actual spacing, and the catalogue stresses that self-alignment absorbs only slight error, so the datum faces still have to be machined or shimmed close.
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 LSH15HN2X1240S20BN-M4
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.