Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-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 asCarriage / block only
- SizeLSH25
- Rail width23 mm
- Carriage lengthStandard carriage
- AccuracyH — high grade
- 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 LSH25BK-HN-H-D-M6
One AirTAC LSH25 square carriage, high accuracy, M6 fitting, pairing code D - and nothing else. No rail ships with this code. The compact H body in standard N length rides four rows of recirculating balls set in crossed 45 degree arc raceways, giving equal capacity radial, reverse-radial and sideways, and it self-aligns by absorbing small mounting errors inside the block. Fitted to a 23 mm wide LSH25 rail (the true rail width; the 25 in the code is a size series, not a measurement).
Why buy a carriage alone? A carriage-only part typically costs about a quarter of a complete set, so when the rail is undamaged, swapping the block is the economic repair. This one is rated 26.9 kN dynamic C and 39.4 kN static C0, with moments MR 0.44, MP 0.38, My 0.38 kN.m - identical to a new set's carriage, since LSH carriages of the same model are interchangeable and keep their preload and accuracy on any rail of that model. The D pairing code must match the rail.
Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-M6 |
|---|---|
| Series | LSH Series Linear Guide |
| Supplied as | Carriage / block only |
| 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 |
| 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 |
| 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, matched by the pairing code |
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. This item is a carriage only. Order a complete set if you also need a rail.
Model Code: Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 25 | Size code — note the rail is 23 mm wide, not 25 mm. |
| BK | Carriage / block only — no rail supplied. |
| H / F1 / F2 / F3 | Carriage style: square, or flange mounted from the top, bottom, or both. |
| N | Standard carriage. |
| H | H — high grade. |
| Pairing code | Rails and carriages must share a pairing code. Take it from the original part when replacing. |
| -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 | Carriage / block only |
|---|---|
| Rail | No — not supplied with this item |
| Carriage | Yes, one |
This is a carriage on its own. NO RAIL IS INCLUDED. 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 LSH25BK-HN-H-D-M6 Is Used
Flow-wrapper forming station repair
Horizontal packaging machines run square carriages around the sealing and forming heads, where grease dries out and contamination scores the balls; a single pairing-D carriage brings the station back without touching the frame.
Plasma table gantry overhaul
During a plasma cutting gantry overhaul, blocks that failed inspection can be renewed individually; this H grade carriage arrives pre-filled with 3.6 cm3 of Mobilux EP2 and bolts onto the existing 23 mm rail.
Bottling line gate actuator replacement
Pusher and gate actuators on bottling lines see side impacts every cycle; the 39.4 kN static rating of a new block absorbs the shock loads that brinelled the old carriage's raceways.
Is the Airtac LSH Linear Guide Rail LSH25BK-HN-H-D-M6 the Right Guide?
If the rail on your machine still passes a finger-and-eye inspection, replacing the block alone is the economic repair - a carriage-only part typically costs about a quarter of a complete set. Confirm the pairing letter is D, then check size by load and moment: 26.9 kN dynamic for life, 39.4 kN static for shock and held loads. Light, compact duty points down to LRM, whose load ratings are unpublished and confirmed per enquiry; short travel needing crossed-roller stiffness points across to LGC; a marginal MR 0.44 kN.m points up to the long LSH25 carriage at 0.58 kN.m or to LSH30 at 0.66 kN.m. Checklist: carriage-only form, size 25, square H standard body, H grade, M6 fitting, pairing code D.
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 LSH25BK-HN-H-D-M6 FAQ
Per carriage: C 26.9 kN dynamic, C0 39.4 kN static, and static moments of 0.44 kN.m MR, 0.38 kN.m MP and 0.38 kN.m My. Accuracy grade H gives 7 to 28 um running parallelism. The rail underneath uses M6 screws at 1370 N.cm on steel, 921 N.cm on cast iron and 686 N.cm on aluminium. Lubrication is 3.6 cm3 on first charge, 1.1 cm3 per top-up, and re-greasing every 100 km of travel or 3 to 6 months.
Because a carriage-only part typically costs about a quarter of a complete set, replacing a worn block on a sound rail is the economical repair. This code contains one square H carriage, standard length, H accuracy, M6 fitting - and no rail. Its pairing code is D; LSH rails and carriages must share that letter to run together, so copy it from your old part. Note that static rating is about 1.5 times dynamic across this range, so size life on C, not on the bigger C0.
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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 LSH25BK-HN-H-D-M6
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