Airtac LSH Linear Guide Rail LSH25BK-F1L-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1L-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 lengthLong 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-F1L-H-D-M6
One AirTAC LSH25 carriage, top-flange F1 style, long body, high accuracy grade, with an M6 lubrication point - and nothing else, because this is a part order, not a set. The profile rail is bought separately and must bear the same pairing letter, D here. Four rows of balls bear on X-shaped 45 degree arc grooves at a 45 degree contact angle, so downward load, uplift and side thrust all meet the same capacity, and slight misalignment of the mounting faces is taken up inside the block instead of binding the ball circuit. Despite the 25 in the size code, the rail that accepts this block is 23 mm wide - check that before cutting your mounting plate.
Static capacity is the headline: C0 is 53.0 kN against a dynamic C of 32.9 kN, a ratio of about 1.6 that matters wherever the block sits dwelled under load or takes shock, since C0 - not C - limits permanent raceway deformation. Moment ratings run MR 0.58 kN.m with MP and My at 0.57 kN.m each. One fitting caution that applies to every flange block: side-entry grease nipples are not recommended on F1, F2 or F3 carriages because the fitting can foul adjacent structure, so plan the lubrication access before you close up the machine.
Airtac LSH Linear Guide Rail LSH25BK-F1L-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1L-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 | Flange, top mounting |
| Carriage length | Long carriage |
| 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 | 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-F1L-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. |
| L | Long 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-F1L-H-D-M6 Is Used
Woodworking CNC router Y-axis service
Dust-laden blocks on a nesting router's Y-rails usually wear out long before the hardened rails do; swapping in this long F1 carriage restores 53.0 kN of static capacity at roughly a quarter of the cost of a complete new set.
Carton overwrapper crosshead
A packaging crosshead that dwells under load at each glue station loads its guide statically for seconds at a time; the 53.0 kN C0 of this long block carries that dwell without brinelling the raceways.
Laser marker beam-carriage swap
Fitting a long top-flange carriage to a laser marking gantry raises moment capacity to 0.58 kN.m MR, letting the marking head overhang further from the guide without tipping under its own cable harness.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1L-H-D-M6 the Right Guide?
Because this is a replacement part, start with the letter and the body style, then justify the size. Long body already chosen: it lifts the standard LSH25 moment rating from 0.44 to 0.58 kN.m, which is the right move whenever a cantilevered load governs. If the real duty is light and space is at a premium, the LRM series steps down in envelope - its ratings are not published, so we confirm them for your case rather than guess. Where the travel is short and the job wants crossed-roller rigidity instead of long recirculating travel, price LGC alongside. If even 0.58 kN.m leaves little margin, move up to LSH30 rather than stacking risk on this size.
Before ordering, run the checklist: carriage-only form confirmed, size justified by load and moment together, F1 top-flange long body, accuracy H, M6 grease point, and the pairing code - the rail must carry the same D, otherwise the block will not seat with its intended preload and running quality.
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-F1L-H-D-M6 FAQ
Per carriage: dynamic rating C 32.9 kN, static rating C0 53.0 kN, moments MR 0.58 kN.m, MP 0.57 kN.m, My 0.57 kN.m. Grade H running parallelism spans 7 to 28 um depending on rail length. The matching size 25 rail uses M6 mounting screws torqued to 1370 N.cm on steel, 921 N.cm on cast iron, 686 N.cm on aluminium. Grease: Mobilux EP2 or equivalent, 4.5 cm3 first charge in the long body, 1.4 cm3 top-up, re-grease every 100 km of travel or every 3 to 6 months.
Just the carriage. No rail ships with this code, and the ordering string has no preload position - preload on LSH is specified on complete-set codes. The pairing code D is the link: your replacement block must match a rail stamped with the same letter, which is why you should read the code off the old carriage or the rail end before ordering.
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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 LSH25BK-F1L-H-D-M6
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