Airtac LSH Linear Guide Block LSH25BK-HN-P-C-M6
The AirTAC LSH Linear Guide Block LSH25BK-HN-P-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
- 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 Block LSH25BK-HN-P-C-M6
This listing is the carriage half of an AirTAC LSH size 25 linear guide: a square (H) block of standard length (N), precision (P) accuracy grade, with an M6 grease fitting, carried under pairing code C. No rail is supplied - order an LSH25RLX rail with the same pairing code, or match this code to the rail already on your machine. Inside the block, four rows of recirculating balls run in X-shaped arc raceways cut at 45 degrees on both sides, two contact points per ball, so pushing up, down or sideways loads the guide the same way. The geometry also self-aligns: a small error between the two mounting surfaces is taken up inside the block instead of binding the balls.
The size code 25 does not describe the rail: an LSH25 rail measures 23 mm wide. Per block, the catalogue rates this standard-length size 25 carriage at 26.9 kN dynamic (C) and 39.4 kN static (C0), with allowable moments of MR 0.44, MP 0.38 and My 0.38 kN.m. Static runs roughly one and a half times dynamic across the whole LSH range, so if you size on C0 because it is the bigger number, you are reading the crash margin, not the travel-life figure.
Airtac LSH Linear Guide Block LSH25BK-HN-P-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH25BK-HN-P-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 | Square (compact) |
| 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 | 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 listed 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 Block LSH25BK-HN-P-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. |
| 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 Block LSH25BK-HN-P-C-M6 Is Used
Vision inspection stage
A benchtop camera XY stage for PCB inspection retrofitted with LSH25 blocks under the moving bridge; the 0.44 kN.m pitch moment carries the camera head overhang without tipping.
Laser marker gantry rebuild
Replacing worn blocks on a fibre-laser marking gantry: the new carriage drops onto the existing pairing-C rail and restores the 3-21 um precision-grade straightness the lens needs.
Dispensing head slide
A glue-dispensing slide on an electronics assembly line, re-greased every 100 km of travel - at a 300 mm stroke cycling once a second, that interval arrives in about two weeks of continuous running.
Is the Airtac LSH Linear Guide Block LSH25BK-HN-P-C-M6 the Right Guide?
Start from the duty, not the code. If the load is light and the envelope is tight, AirTAC's LRM series steps down from LSH - but its load ratings are not published, so we confirm suitability for your cycle before you commit. If travel is short and you need crossed-roller rigidity rather than long recirculating travel, LGC is the better cross-check. Stay with this size 25 carriage when the numbers above hold: 26.9 kN dynamic and 0.44 kN.m pitch moment per block. Before ordering, tick off the checklist: form (carriage only), size by load AND moment, carriage style and length, block count and rail length, accuracy grade, grease fitting, and above all the pairing code - rails and carriages must share the letter, and a single mismatch means the block will not run.
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 Block LSH25BK-HN-P-C-M6 FAQ
Per block: dynamic C 26.9 kN, static C0 39.4 kN, moments MR 0.44, MP 0.38 and My 0.38 kN.m. Precision grade running parallelism spans 3-21 um depending on rail length. Rail mounting screws are M6, torqued to 1370 N.cm in steel, 921 in cast iron, 686 in aluminium. Grease: 3.6 cm3 first charge, 1.1 cm3 top-up, Mobilux EP2 or equivalent, every 100 km of travel or every 3-6 months.
No rail is included - this SKU is the carriage only. AirTAC matches carriages to rails by a pairing letter; this block is code C, so the rail it runs on must also be code C. The letter is marked on the rail and the block; if you cannot read it off a worn part, send us the machine details and we will confirm the match before you order.
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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 Block LSH25BK-HN-P-C-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.