Airtac LSH Linear Guide Rail LSH25BK-F1N-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1N-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-F1N-H-D-M6
This is the block alone: an AirTAC LSH25BK-F1N-H-D-M6 high-accuracy top-flange carriage with pairing code D and an M6 grease point. The order code contains no rail, and no rail ships with it - pair it with a D-marked LSH25 rail, whose true width is 23 mm, not 25. Four rows of recirculating balls bear on 45 degree X-shaped arc grooves, so downward, sideways and lift-off loads all meet the same capacity, and small flatness errors in the mounting face are taken up inside the carriage rather than causing bind.
For a cantilevered or overhung load, the number that decides is MR: 0.44 kN.m here, with MP and My at 0.38 kN.m, on a static base of C0 39.4 kN and a dynamic rating of C 26.9 kN. The H grade holds running parallelism between 7 and 28 um depending on rail length. If the overhang keeps growing, remember that the long LSH25L carriage raises MR to 0.58 kN.m - about a third more moment on the same rail width.
Airtac LSH Linear Guide Rail LSH25BK-F1N-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1N-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 | 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-F1N-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-F1N-H-D-M6 Is Used
AOI camera arm
An automated optical inspection station hangs its camera head on a short cantilever off the scan axis. This D-paired carriage carries the moment at the mount, and the high accuracy grade keeps the optics' position repeatable frame to frame.
Case-packing pusher slide
A case packer's pusher slide runs flange blocks against a D-coded rail. Replacing just the block - at roughly a quarter of a full set's price - squares the pusher up again after the old raceways have brinelled.
Wire-straightening head slide
A wire-processing machine's straightener head sits off-axis from its slide, so moment governs the sizing. This carriage's 0.44 kN.m MR and top flange suit the head's clamp plate, which bolts down from above.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1N-H-D-M6 the Right Guide?
Overhung loads - a camera arm, a gripper at the end of a slide - should be sized on MR before C: this block carries 0.44 kN.m, and stepping one size up to LSH30 lifts that to 0.66 kN.m, roughly 50 percent more moment capacity for one part. If travel life governs instead, work from the dynamic C 26.9 kN rather than the larger C0 39.4 kN; static sits near 1.5 times dynamic across the range, which is exactly why buyers sometimes read the wrong column.
When the duty is light and the envelope tight, ask about LRM - its load ratings are not published, so we confirm them for your application. For short travels needing crossed-roller rigidity rather than long recirculating travel, LGC is the cross-over option. Before ordering, run the checklist: carriage-only form, size by load and moment, F1 flange with standard N length, block count and rail length, H accuracy, M6 fitting position, and pairing letter D matched to your rail. Preload is not a position in this carriage code; it is chosen on complete sets, where grades B and C add rigidity but shrink the mounting error the guide will tolerate.
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-F1N-H-D-M6 FAQ
Dynamic load C is 26.9 kN and static C0 is 39.4 kN per carriage. Moment limits are MR 0.44, MP 0.38 and My 0.38 kN.m. The high accuracy grade runs at 7-28 um parallelism depending on rail length. The paired LSH25 rail bolts down with M6 screws torqued to 1370, 921 and 686 N.cm on steel, cast iron and aluminium. Grease is Mobilux EP2 as supplied - 3.6 cm3 first fill, 1.1 cm3 top-up - refreshed every 100 km of travel or every 3 to 6 months, whichever comes first.
One carriage. There is no rail in this order code and none in the parcel. AirTAC gives LSH carriages and rails of the same model a shared pairing letter so a block keeps its smoothness, preload and accuracy on any matching rail; this one is coded D and must be mounted on a D-coded LSH25 rail. Take the letter from your original part's ordering code - guessing from measurements is how mismatched pairs get ordered.
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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-F1N-H-D-M6
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