Airtac LSH Linear Guide Rail LSH25BK-F1N-N-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F1N-N-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
- 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-F1N-N-D-M6
What arrives is one AirTAC LSH25 carriage block: F1 top-flange pattern for bolting down from above, standard length, normal accuracy, M6 grease fitting. There is no rail in this order and this code does not describe one. Inside the block, four ball rows run in opposed 45 degree arc raceways with two contact points per ball, giving equal capacity up, down and sideways plus enough self-alignment to swallow small datum errors in the surface beneath it. The true rail width at size 25 is 23 mm.
The numbers that size this block: 26.9 kN basic dynamic load, 39.4 kN static, moment limits of 0.44 kN.m MR against 0.38 kN.m MP and My. For an overhung load the MR figure often calls the shot - a long block would raise MR to 0.58 kN.m, a 32 percent gain, while dynamic capacity climbs only about 22 percent, so moment usually decides before C does. The D in this code is a pairing letter, not a preload grade: preload is fixed when block meets rail and never appears in a carriage-only order code.
Airtac LSH Linear Guide Rail LSH25BK-F1N-N-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F1N-N-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 | 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-F1N-N-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. |
| 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-F1N-N-D-M6 Is Used
Paint line lift door
A conveyorized paint booth's counterbalanced access door runs on two of these F1 blocks, one per rail, so the tipping moment of the overhanging door is shared instead of loading a single block's 0.44 kN.m MR alone.
Surface grinder overhaul
A toolroom rebuilding a surface grinder worktable fits new size 25 blocks, pulls the top flanges down onto the machined pads at the specified M6 torque and charges 3.6 cm3 of grease per block before the first grinding pass.
Carton erector pusher arm
On a packaging machine's case pusher, a cracked block is swapped for this D-coded spare, the 26.9 kN dynamic rating covering the cyclic pushing load with margin to spare.
Is the Airtac LSH Linear Guide Rail LSH25BK-F1N-N-D-M6 the Right Guide?
Size by moment first if the load hangs off the block. One LSH25 block carries MR 0.44 kN.m; if that is marginal, a second block on the same rail addresses tipping along the travel far more cheaply than jumping a size - going up to LSH30 lifts MR only to 0.66 kN.m, about 50 percent, and drags in a new 28 mm rail width. Downward, light duties with a slim envelope suit AirTAC LRM, whose ratings are unpublished - send the duty and we confirm them. Short-stroke stages wanting crossed-roller rigidity belong with LGC instead.
Before ordering, tick off: carriage-only form, size against both C and MR, F1 flange orientation, standard versus long, block count and rail length, accuracy and preload grade together with the mounting tolerance each costs you, M6 fitting, and the pairing letter - D on this listing, and the same letter must appear on the rail it mates with.
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-N-D-M6 FAQ
Per block: dynamic 26.9 kN, static 39.4 kN, moments 0.44 kN.m (MR) and 0.38 kN.m (MP and My). N-grade parallelism runs 12-37 um across the rail length bands. Fixing screws M6 at 1370 N.cm steel, 921 cast iron, 686 aluminium. Lubrication 3.6 cm3 to fill, 1.1 cm3 to top up, re-grease every 100 km of travel or every 3 to 6 months, whichever comes first. Carriage only - pair with a D-coded LSH25 rail.
Carriage-only codes carry no preload position at all - preload is created by matching this block to a rail, so it belongs to the pair, not to the part. The box holds one top-flange block with M6 fitting, normal accuracy and pairing letter D, and no rail. Order the same letter on your rail, or read the letter off the rail you already have before buying.
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-F1N-N-D-M6
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