Airtac LSH Linear Guide Rail LSH25BK-F2L-P-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2L-P-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
- AccuracyP — precision 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-F2L-P-D-M6
LSH25BK-F2L-P-D-M6 is a spare long carriage, not a complete guide. It is the size 25 F2 bottom-flange block in P precision, with M6 grease point and pairing code D, sold so a worn slide can be renewed without replacing sound rail. Like every LSH block it carries four ball rows on 45 degree X-shaped raceways, so downward, lift-off and side loads all draw on the same rating, and minor surface misalignment is taken up inside the body. The 23 mm rail of size 25 is narrower than the size code suggests - verify your datum layout before machining.
Static capacity is 53.0 kN, about 1.6 times the 32.9 kN dynamic rating, and moments reach 0.58 / 0.57 / 0.57 kN.m. Because a carriage alone costs roughly a quarter of a full set, swapping the block is the economic repair whenever the rail still passes a clean straightness check. Keep the grease schedule honest: on a 250 mm stroke cycling 20 times a minute, a block covers 100 km in around two weeks, so the distance limit bites well before the calendar's 3 to 6 months.
Airtac LSH Linear Guide Rail LSH25BK-F2L-P-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2L-P-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, bottom 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 | P — precision 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-F2L-P-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. |
| P | P — precision 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-F2L-P-D-M6 Is Used
Packaging line cam station rebuild
A carousel filler's guide block that has braked loads for millions of cycles can be swapped in one shutdown window, restoring the 32.9 kN dynamic rating without touching the rail.
Pick-and-place Z module service
Rebuilding a gantry robot's vertical slide with a fresh P-grade block returns the original 0.58 kN.m moment capacity for cantilevered grippers.
Fixture upgrade on a machining centre
Adding a bottom-flange carriage under an undercut workstop lets the top surface carry clamps while the flange fastens from beneath the table.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2L-P-D-M6 the Right Guide?
Buy this D-coded block when the original carriage on your machine is worn and the rail is sound; the pairing letter D must match the rail, and P accuracy carries over from the code. If the application is lighter and space-constrained, LRM may suit the frame better - its load ratings are unpublished, so ask us to confirm them. Where travel is short and stiffness matters more than stroke, compare LGC crossed-roller guides; where moment demand outgrows 0.58 kN.m, go up to LSH30. Before ordering confirm: carriage-only form, size from load and moment, flange style F2, long body, accuracy P, M6 fitting, pairing D. One caution: side-mounted nipples are not recommended on flange-type carriages because the fitting can foul adjacent parts, so check clearance before mounting.
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-F2L-P-D-M6 FAQ
Per carriage: C 32.9 kN dynamic, C0 53.0 kN static, moments MR 0.58 / MP 0.57 / My 0.57 kN.m. Accuracy P means 3-21 um running parallelism across the rail length. Lubrication: Mobilux EP2, 4.5 cm3 first charge and 1.4 cm3 per top-up, renewed every 100 km or 3-6 months via the M6 fitting. The mating rail uses M6 screws torqued to 1370 / 921 / 686 N.cm on steel / cast iron / aluminium.
The box holds one long F2 carriage with its M6 grease point - no rail, no rail screws, no bolt caps. D is the pairing letter: the replacement block must share it with the rail, because carriages are matched to same-code rails for smoothness, preload and accuracy. Read the D off the original block or the rail end before ordering.
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-F2L-P-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.