Airtac LSH Linear Guide Rail LSH25HL6X2400S30CN-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HL6X2400S30CN-M6 is a standard-type profile linear guide on a 23 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
- SizeLSH25
- Rail width23 mm
- Carriage lengthLong carriage
- Carriages6
- Rail length2400 mm
- AccuracyN — normal grade
- PreloadC — medium 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 LSH25HL6X2400S30CN-M6
Preload C is the defining choice here: this LSH25 set pairs a 2400 mm rail (30 mm end-hole offset) with six long square carriages whose balls are pre-tensioned in the four-row 45 degree raceway system to remove running play. The payoff is a noticeably stiffer axis under reversing loads and vibration; the price is a narrower installation window, because preloaded balls have less room to absorb mounting error. Rail width is 23 mm on this size, accuracy grade N, lubrication by M6 fitting.
The stiffness costs installation latitude: at 500 mm rail spacing, medium preload limits allowable parallelism error to 20 um and height error to 70 um, against 30 and 130 um for the same size without preload - so the datum faces must be machined to match. In return each long carriage still offers 32.9 kN dynamic, 53.0 kN static and 0.58 / 0.57 / 0.57 kN.m of moment capacity, and six blocks along 2.4 m share the load so no single carriage sits at its limit.
Airtac LSH Linear Guide Rail LSH25HL6X2400S30CN-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HL6X2400S30CN-M6 |
|---|---|
| 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 | LSH25 |
| Rail width | 23 mm (the size code is not the rail width above size 20) |
| Carriage style | Square (compact) |
| Carriage length | Long carriage |
| Carriages supplied | 6 |
| Rail length | 2400 mm |
| Basic dynamic load rating C | 32.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 53.0 kN per carriage |
| Allowable static moment | MR 0.58 / MP 0.57 / My 0.57 kN·m |
| Accuracy grade | N — normal grade |
| Preload grade | C — medium preload |
| Mounting screws | M6 — 1370 N·cm into steel, 921 cast iron, 686 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 LSH25HL6X2400S30CN-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| L | Long carriage. |
| 6X2400 | 6 carriages on a 2400 mm rail. |
| S… | End-hole offset from the rail end, in mm. |
| C | C — medium 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, 2400 mm |
| Carriage | Yes, 6 |
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 LSH25HL6X2400S30CN-M6 Is Used
Metrology bridge on granite
A measuring bridge crossing a granite surface plate; medium preload damps stick-slip so encoder feedback stays honest at slow scan speeds, provided the bridge pads are ground to the 70 um height window per 500 mm.
Mill head slide retrofit
Converting a manual milling column to CNC: six long blocks on the 2400 mm rail resist the cantilevered spindle head, and preload C firms up the cut so depth-of-cut steps no longer translate into Z-axis backlash.
Carton-filling servo axis
A horizontal fill-and-seal axis on a packaging machine where dwell marks from reversal backlash are a reject cause; the preloaded carriages take up the play, at the cost of holding rail parallelism to 20 um per 500 mm of span.
Is the Airtac LSH Linear Guide Rail LSH25HL6X2400S30CN-M6 the Right Guide?
Choose this configuration when the axis reverses or holds position and play would show up in the workpiece - but only if your shop can hold flatness and height to the tighter medium-preload allowances; if it cannot, the no-preload version of the same set is the honest choice. Lighter duties with small envelopes belong on LRM, whose unpublished ratings we verify for you before ordering; short-stroke applications needing crossed-roller stiffness map onto LGC instead. If moment still governs after the long carriage and six blocks, move to LSH30 long (0.88 kN.m MR). Final checks: form (complete set), load and moment against C and MR, carriage style and length, count, rail length and end offset, accuracy and preload with the trade-off priced in, grease fitting, and pairing code for any replacement 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 LSH25HL6X2400S30CN-M6 FAQ
Per carriage: C 32.9 kN basic dynamic, C0 53.0 kN basic static, moments MR 0.58 / MP 0.57 / My 0.57 kN.m. N accuracy gives a running parallelism band of 12-37 um across the rail length range. Fixing: M6 screws, 1370 N.cm steel / 921 cast iron / 686 aluminium. Grease: 4.5 cm3 per long carriage at first charge, 1.4 cm3 top-ups, repeated every 100 km of travel or every 3 to 6 months. The carriages ship with Mobilux EP2 or an equivalent already inside.
It stiffens the guide and removes play, and it also shrinks the mounting allowances: with preload C, LSH25 tolerates 20 um of parallelism error and 70 um of height error per 500 mm of rail spacing, versus 30 and 130 um unpreloaded - roughly halving and more the latitude you have. Self-alignment still absorbs slight error, but only within those values. Also mind the geometry: shoulder heights H 6.5, H1 5 and H2 5 mm with a corner radius no greater than 1 mm, and a rail pulled flat and correctly torqued, or the achieved accuracy will not match the grade.
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1-Year Warranty
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 LSH25HL6X2400S30CN-M6
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