Airtac LSH Linear Guide Rail LSH25BK-HN-H-E-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-HN-H-E-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-E-M6
Accuracy is the selling point here: this is the H grade LSH25 square carriage, pairing code E, sold as a carriage only with no rail. One compact H block, standard N length, M6 grease fitting, pre-filled with Mobilux EP2. Four rows of balls contact X-shaped 45 degree arc raceways at two points each, carrying load equally up, down and sideways while swallowing slight mounting-surface misalignment inside the body. It runs on a 23 mm wide rail - LSH25's true rail width, two millimetres under the size code.
H grade holds running parallelism between 7 and 28 um across the rail length band, against 12 to 37 um for N grade, so a rebuilt axis can keep the tighter straightness its drawings assume. Per carriage: C 26.9 kN, C0 39.4 kN, moments MR 0.44 / MP 0.38 / My 0.38 kN.m. Accuracy also depends on the rail being pulled flat against its datum and torqued right - a grade H carriage on a badly bolted rail gives grade-N results. Match the pairing code E rail.
Airtac LSH Linear Guide Rail LSH25BK-HN-H-E-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-HN-H-E-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-E-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-E-M6 Is Used
Laser marking head carriage upgrade
Gantry-style laser marking machines live or die by straightness; stepping a rebuilt axis up to this H grade carriage tightens running parallelism from the 12-37 um N band to 7-28 um, sharpening spot placement.
Granite comparator slide rebuild
A dimensional-metrology comparator sliding on a granite base keeps its certified straightness only if the carriage grade matches; this H block replaces a worn carriage without disturbing the rail setting.
SMT magazine feeder retrofit
Feeder racks on SMT lines cycle thousands of strokes a day; at a 300 mm stroke and 1 Hz, the 100 km re-grease point arrives in roughly two days of continuous running, so a spare H grade carriage on the shelf keeps the line moving.
Is the Airtac LSH Linear Guide Rail LSH25BK-HN-H-E-M6 the Right Guide?
Choose this H grade carriage when the machine drawing or the rebuild spec demands running parallelism inside 7 to 28 um; N grade at 12 to 37 um will not hold that line. Accuracy grade and pairing code are independent - the pairing letter here is E, and an H carriage matches an E rail regardless of the rail's own grade. Size on load and moment together: 26.9 kN dynamic C and 0.44 kN.m MR cover most medium overhung duties, and the long LSH25 carriage raises MR to 0.58 kN.m if the cantilever grows. Step down to LRM for light compact duty (its ratings are not published; we confirm them), across to LGC for short travel where crossed-roller rigidity matters more than long recirculating travel. Checklist: carriage only, grade H, square H body standard length, size 25, M6 fitting, pairing code E.
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-E-M6 FAQ
Dynamic rating C 26.9 kN and static C0 39.4 kN per carriage; allowable moments MR 0.44, MP 0.38 and My 0.38 kN.m. H grade running parallelism: 7 to 28 um, against 12 to 37 um for N grade. Rail mounting: M6 screws, 1370 / 921 / 686 N.cm for steel, cast iron and aluminium. Grease: 3.6 cm3 first fill, 1.1 cm3 top-up, interval 100 km of travel or 3 to 6 months, Mobilux EP2 or equivalent.
One pre-greased LSH25 square carriage with an M6 fitting, high accuracy grade. There is no rail in the box and no preload figure applies to this code, since preload is a property of the matched set. The pairing letter here is E: any LSH25 rail stamped E will accept this carriage, and any other letter will not. Confirm the letter on the old rail or carriage first. Achieved accuracy also depends on the rail being pulled flat to its datum and torqued correctly, not on the carriage grade alone.
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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-E-M6
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