Airtac LSH Linear Guide Rail LSH25HN1X180S30BH-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25HN1X180S30BH-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 lengthStandard carriage
- Carriages1
- Rail length180 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 LSH25HN1X180S30BH-M6
AirTAC LSH is a standard-type linear guide: a hardened profile rail carrying recirculating-ball carriages, four rows of balls seated in X-shaped arc raceways at 45 degrees, each ball touching at two points. This listing, LSH25HN1X180S30BH-M6, is a complete set - one square H carriage, standard length, running on a 180 mm rail, supplied greased with the carriage already fitted. Note for layout work: size 25 rails measure 23 mm wide, not 25 mm.
The B in the code orders light preload, so the ball rows run pre-stressed and the carriage resists play under reversing loads. Light preload also narrows the installation window: at 500 mm rail spacing the allowable height error S falls from 130 um with no preload to 85 um, and allowable parallelism P from 30 to 22 um - roughly a third tighter in height. Ratings per carriage: C 26.9 kN dynamic, C0 39.4 kN static, moments MR 0.44 / MP 0.38 / My 0.38 kN.m. Size the axis on C, not on the larger static number.
Airtac LSH Linear Guide Rail LSH25HN1X180S30BH-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25HN1X180S30BH-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 | Standard carriage |
| Carriages supplied | 1 |
| Rail length | 180 mm |
| Basic dynamic load rating C | 26.9 kN per carriage |
|---|---|
| Basic static load rating C0 | 39.4 kN per carriage |
| Allowable static moment | MR 0.44 / MP 0.38 / My 0.38 kN·m |
| Accuracy grade | H — high grade |
| Preload grade | B — light 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 LSH25HN1X180S30BH-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. |
| N | Standard carriage. |
| 1X180 | 1 carriage on a 180 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, 180 mm |
| Carriage | Yes, 1 |
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 LSH25HN1X180S30BH-M6 Is Used
Short-stroke pick-and-place head
A 30 mm shuttle stroke cycling at one station per second is exactly where preload B earns its keep - the pre-stressed ball rows remove the knock of direction reversal, so the part lands in the nest without overshoot.
Oscillating fatigue test sled
A rig that strokes a specimen back and forth all day needs a guide that will not develop lash. Light preload holds the carriage stiff through every reversal while still tolerating 85 um of height error over a 500 mm span.
Benchtop CNC router Z-slide
Under a router motor the load is cantilevered, so the 0.44 kN.m MR rating of the size 25 square carriage matters more than the 26.9 kN dynamic figure - and light preload keeps the tool from chattering on re-entry.
Is the Airtac LSH Linear Guide Rail LSH25HN1X180S30BH-M6 the Right Guide?
Choose preload B when the axis reverses often - a short-stroke feeder or an oscillating table - and lost motion would read back into the process. If your duty is genuinely light and the space tight, step down to AirTAC LRM; its load ratings are not published, so we confirm them against your application before you commit. If the moment governs, a long LSH25 L carriage lifts MR from 0.44 to 0.58 kN.m, and one size up changes the true rail width too, so re-check your mounting drawing. For short travel where crossed-roller rigidity beats long recirculating travel, LGC is the cross-over.
Checklist before ordering: form (this is a complete set), size chosen on load AND moment, carriage style and length, carriage count and rail length, accuracy and preload against the tolerances your base can actually hold, grease fitting (the M6 family serves sizes 20 to 35), and the pairing code from your old part if this ever becomes a carriage-only repair.
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 LSH25HN1X180S30BH-M6 FAQ
Per standard-length carriage: dynamic C 26.9 kN, static C0 39.4 kN, allowable moments MR 0.44, MP 0.38 and My 0.38 kN.m. Running parallelism at N accuracy is 12 to 37 um depending on rail length. Mount the rail with M6 screws torqued to 1370 N.cm on steel, 921 on cast iron or 686 on aluminium. Grease: 3.6 cm3 first charge and 1.1 cm3 top-ups per carriage, Mobilux EP2 or equivalent, refreshed every 100 km of travel or every 3 to 6 months.
Rigidity is not free. At 500 mm rail spacing, allowable parallelism error P tightens from 30 um (no preload) to 22 um, and allowable height error S from 130 to 85 um; the values scale with the actual span. Your base must also respect the 6.5 mm mounting shoulder and a corner radius of 1 mm or less, and the rail must be pulled flat against the datum and fully torqued - whether it is makes a large difference to the accuracy you end up with.
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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.
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