Airtac LSH Linear Guide Rail LSH25BK-F2N-H-C-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2N-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 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-F2N-H-C-M6
This listing is the carriage alone: one AirTAC LSH25 bottom-flange (F2) block, standard length, high accuracy grade, with an M6 grease nipple. No rail is supplied - the 23 mm wide profile rail is ordered separately under the matching pairing code. The block runs on four rows of recirculating balls seated in X-shaped arc raceways cut at 45 degrees, two contact points per ball, so it carries equal load up, down and sideways and absorbs slight mounting-surface error by self-alignment instead of binding.
Per carriage the catalogue rates this size 25 standard block at 26.9 kN dynamic and 39.4 kN static, with moments of 0.44 kN.m MR, 0.38 kN.m MP and 0.38 kN.m My. Static sits at roughly 1.5 times dynamic here, which is typical across the range - size on C for travel life, not on the bigger C0 figure. The pairing code for this unit is C; your rail must carry the same letter.
Airtac LSH Linear Guide Rail LSH25BK-F2N-H-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2N-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, bottom 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-F2N-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. |
| 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-F2N-H-C-M6 Is Used
CNC router gantry block swap
A light industrial CNC router whose square blocks have developed play can be revived by swapping the carriage alone, provided the 23 mm rail still runs smooth. Match pairing code C to the existing rail.
Pick-and-place trolley rebuild
Assembly-line pick-and-place units riding 25 mm rails take sideloads every cycle; replacing a worn F2 block restores the 0.44 kN.m roll moment rating without reworking the machine frame.
Inspection fixture refresh
A coordinate checking fixture moving over a long bed can gain running quality by fitting high-accuracy H-grade blocks like this one while keeping the rails already bolted down.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2N-H-C-M6 the Right Guide?
Size the duty by both load and moment. If the moment governs, remember one size up beats adding parts elsewhere: LSH20 to LSH25 lifts MR from 0.27 to 0.44 kN.m, about 63 percent, for a single component, and the long LSH25 block pushes it to 0.58 kN.m. For light duty in a tight envelope step down to LRM, whose load ratings are not published - we confirm them before you commit. Where travel is short and the job needs crossed-roller rigidity rather than long recirculating travel, step across to LGC.
Before ordering check: form (carriage only, no rail), size 25 by load AND moment, F2 flange with bottom mounting, standard length, one block, accuracy H, M6 fitting, and pairing code C off the rail you are matching. Base material, weight and speed limits are not in the catalogue - confirm them from the datasheet via our quotation.
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-F2N-H-C-M6 FAQ
Dynamic load C 26.9 kN and static C0 39.4 kN per block. Moment ratings MR 0.44, MP 0.38 and My 0.38 kN.m. H grade running parallelism spans 7-28 um depending on rail length. Mount with M6 screws at 1370 N.cm into steel, 921 into cast iron, 686 into aluminium. Grease charge 3.6 cm3, top-up 1.1 cm3; re-grease every 100 km of travel or every 3 to 6 months, whichever comes first.
No rail is included - this is the carriage alone. Every LSH25 rail and carriage carries a pairing letter, and the two parts must share it; this block is coded C. Take the letter from the original rail's end label or packaging when ordering a replacement. Any carriage of this model fits any rail of the same code and keeps its running quality; nothing here is interchangeable with another manufacturer's 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-F2N-H-C-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.