Airtac LSH Linear Guide Rail LSH25BK-F1L-N-C-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1L-N-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
- AccuracyN — normal 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-N-C-M6
This SKU is the carriage only from the AirTAC LSH25 range: a top-flange (F1) block in the long body, normal accuracy, with an M6 grease nipple. No rail is supplied - the hardened profile rail must be ordered separately. Inside, four rows of balls run in X-arranged arc raceways set at a 45 degree contact angle, which gives the block equal capacity up, down and sideways and lets it absorb slight mounting error instead of binding. Size 25 rides on a 23 mm wide rail, not a 25 mm one, so check the datum face before drilling.
As the long carriage, this block lifts moment capacity faster than load: against the LSH25 standard body, the dynamic rating rises from 26.9 to 32.9 kN while MR goes from 0.44 to 0.58 kN.m, about 32 percent. Static capacity is 53.0 kN, roughly 1.6 times the dynamic figure - size travel life on C, not C0. Because this is an F1 flange block, bolt it from the top through the flange and check that the side-mounted M6 nipple clears surrounding structure before final mounting.
Airtac LSH Linear Guide Rail LSH25BK-F1L-N-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1L-N-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 | N — normal 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-N-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. |
| N | N — normal 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-N-C-M6 Is Used
Router Z-axis block renewal
A worn carriage on the vertical slide of a CNC wood router shows play under the spindle. Swapping in this long F1 block restores the running feel without replacing the 23 mm rail, provided the rail's pairing code is C.
Automotive trim-line pallet slider
Pallet transfer rails in a trim assembly line accumulate kilometres every shift. This top-flange block, topped up with 1.4 cm3 through its M6 nipple every 100 km, suits the bolt-down-from-above layout of those slider plates.
Optical inspection stage retrofit
An ageing coordinate inspection table can be refreshed by fitting normal-accuracy long carriages; the four-row 45 degree ball geometry keeps the stage smooth across a typical 300 mm measuring stroke.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1L-N-C-M6 the Right Guide?
Size this block by load and by moment together. If the duty is light and the envelope tight, step down to AirTAC LRM - but note LRM publishes no load ratings, so we confirm them with you before you commit. If moment governs, either keep the long body you are looking at or step up one size: LSH25 N carries MR 0.44 kN.m against 0.27 for LSH20 N, about 63 percent more for one part. Where travel is short and you need crossed-roller rigidity rather than long recirculating travel, ask about LGC instead.
Checklist before you order: form (carriage only, no rail), size 25 by load and moment, F1 top-flange style, long body, count of blocks per machine axis, accuracy N, grease fitting M6 (the M6 family covers sizes 20 to 35), and pairing code C matched to the rail.
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-N-C-M6 FAQ
Per carriage, LSH25 long body: basic dynamic load C 32.9 kN; basic static load C0 53.0 kN; allowable static moment MR 0.58, MP 0.57, My 0.57 kN.m. At N accuracy the running parallelism band is 12-37 um depending on rail length. The mating rail uses M6 mounting screws at 1370 N.cm into steel, 921 into cast iron, 686 into aluminium. Grease (Mobilux EP2 or equivalent): 4.5 cm3 first charge, 1.4 cm3 top-up, every 100 km of travel or every 3 to 6 months, whichever comes first.
No rail is included - this SKU is the carriage alone, with no preload of its own. Every AirTAC LSH25 rail carries a pairing letter, and this block is C: the block and the rail must share the same letter to pair. Any LSH25 carriage fits any LSH25 rail of the matching code and keeps its smoothness and accuracy, so a replacement block is a direct swap onto a sound rail.
Authorized Export Seller
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-F1L-N-C-M6
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