Airtac LSH Linear Guide Rail LSH25BK-F1L-H-C-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1L-H-C-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-C-M6
This listing is the carriage alone from the AirTAC LSH25 linear guide range: a top-flange (F1) block in the long body, high accuracy grade, fitted with an M6 grease point. No rail is supplied - you are ordering the recirculating-ball carriage by itself, matched to an LSH25 rail that carries the same pairing letter, here C. The F1 flange is drilled for bolts that pass down through the top, so a table or carrier plate bolts to the block from above. Inside, four rows of balls run in X-arranged 45 degree arc raceways, giving equal capacity upward, downward and sideways, plus enough self-alignment to absorb small machining errors on the mating faces. Note the size code says 25 but the rail it rides on is 23 mm wide.
Going long pays off mainly in moment: this long body is rated 0.58 kN.m MR and 0.57 kN.m for both MP and My, against 0.44 kN.m MR for the standard LSH25 body - roughly 32 percent more overturning capacity bought with only a 22 percent gain in dynamic rating (32.9 kN versus 26.9 kN). Static rating is 53.0 kN, about 1.6 times the dynamic figure. If your load hangs off the block on a lever arm, the moment column, not the kN column, is what picks the carriage.
Airtac LSH Linear Guide Rail LSH25BK-F1L-H-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1L-H-C-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-C-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-C-M6 Is Used
CNC plasma table X-axis rebuild
Blocks on a plasma cutting gantry brinell early from spark and grit while the rails below stay sound; bolting this long F1 carriage onto the existing 23 mm LSH25 rail revives the axis for a fraction of a full re-rail, provided the pairing code matches.
Vision inspection camera slide
An overhead camera carrier traversing above a metrology conveyor tends to tip because the camera arm overhangs the block; the long body's 0.58 kN.m MR rating resists that overturning and keeps the lens plane steady.
Pick-and-place gantry retrofit
Updating an older pick-and-place module: this top-flange carriage lets the Z-unit plate be bolted down through the flange from above, so the retrofit needs no new tapped features on the mating plate.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1L-H-C-M6 the Right Guide?
Confirm the form first: this SKU is a spare carriage, so it belongs on a bench where LSH25 rails already exist or on a rebuild ticket. Size by load and moment together - for a cantilevered head, check your overturning moment against the 0.58 kN.m MR before you even read the 32.9 kN dynamic rating. If the duty is genuinely light and the envelope small, the LRM series may be enough; its load ratings are not published, so we confirm them against your application before you commit. Where travel is short and you need crossed-roller stiffness rather than long recirculating travel, LGC is the alternative to price. And if the moment still sits too close to the limit, either step up to LSH30 or keep this long block and add a second carriage to share the tipping.
Order checklist: form (carriage only), size chosen by load AND moment, F1 top-flange style in the long body, accuracy grade H, M6 grease fitting, and above all the pairing code - the rail you bolt this onto must carry the same letter, C in this case. Read it off the old block or the rail end before ordering.
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-C-M6 FAQ
Per carriage: dynamic rating C 32.9 kN, static rating C0 53.0 kN, moment ratings MR 0.58, MP 0.57 and My 0.57 kN.m. Accuracy grade H gives a running parallelism band of 7 to 28 um over the rail length. The mating size 25 rail is screwed down with M6 bolts at 1370 N.cm into steel, 921 N.cm into cast iron and 686 N.cm into aluminium. Lubrication: the long body takes a 4.5 cm3 first charge of Mobilux EP2 or equivalent, topped up with 1.4 cm3 every 100 km of travel or every 3 to 6 months, whichever comes first.
No. LSH25BK-F1L-H-C-M6 is the carriage only - there is no rail in the box and no preload position in this code. LSH rails and carriages carry a pairing code and the letters must agree: this block is code C, so it pairs only with an LSH25 rail also marked C. When replacing a worn block, read the letter off the old carriage or the rail end before you order.
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