Airtac LSH Linear Guide Rail LSH25BK-HL-P-E-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-HL-P-E-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-HL-P-E-M6
A precision-grade long carriage sold on its own, for machines where straightness of travel is the specification. LSH25BK-HL-P-E-M6 is an AirTAC LSH25 square block of long body, accuracy grade P, pairing code E, M6 nipple. The rail is not part of this item; order an E-coded LSH25 rail alongside it or verify the E marking on the rail you already run. Four rows of balls contact the arc raceways at 45 degrees from two directions, giving matched capacity in all four load directions and internal compensation of slight surface error. The rail beneath it measures 23 mm wide.
Grade P holds running parallelism within a 3 to 21 um band across the rail length range. Two practical points decide whether you achieve it: the mounting datum must leave a corner radius no greater than 1 mm at the 6.5 mm shoulder, and the M6 screws must pull the rail flat - 1370 N.cm into steel, 921 into cast iron, 686 into aluminium. Also worth knowing: this long body reaches 0.58 kN.m MR, close to the 0.66 kN.m of a standard LSH30 block, so it often saves stepping up a size.
Airtac LSH Linear Guide Rail LSH25BK-HL-P-E-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-HL-P-E-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 | 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-HL-P-E-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-HL-P-E-M6 Is Used
Metrology stage for a lab contact profiler
A profiler stage needs straight travel, not brute force. The P grade holds 3 to 21 um of running parallelism, and the long body's 0.58 kN.m MR steadies the probe arm on its overhang.
Laser cutter gantry block swap
Replacing one carriage on a two-block laser gantry: order this E-coded precision block to match the rail's E marking, and the restored side carries its share of the 53.0 kN static load without re-leveling the beam.
Straightening fixture for motor shaft repair
A hydraulic straightening press for motor shafts rides on a short LSH25 rail; this long precision block, paired to its E-coded rail, takes the bending reaction as moment rather than tipping under it.
Is the Airtac LSH Linear Guide Rail LSH25BK-HL-P-E-M6 the Right Guide?
Compare three routes before ordering. LRM below this size handles light duty in less space, though its ratings are unpublished and we confirm them case by case. LGC crossed rollers serve short travels that need higher rigidity than a recirculating ball guide gives over long runs. If even 0.58 kN.m of MR is not enough, LSH30 is the step up. Then run the pre-order checks: form is one carriage, no rail; load and moment sized together; long square body at grade P; single block; precision parallelism 3 to 21 um; preload and final accuracy are chosen on the matched set, and tighter preload shrinks the permissible mounting error; M6 fitting; and pairing code E matched between rail and block.
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-HL-P-E-M6 FAQ
One long square LSH25 carriage, precision grade: dynamic 32.9 kN, static 53.0 kN, MR/MP/My moments 0.58/0.57/0.57 kN.m, running parallelism 3 to 21 um, rail mounting screws M6 at 1370 N.cm into steel, 921 into cast iron, 686 into aluminium, 4.5 cm3 initial grease and 1.4 cm3 per top-up on a 100 km or 3-6 month cycle.
One carriage with M6 nipple - no rail, no screws, no bolt caps. You need an E-coded LSH25 rail in sound condition. The pairing letter appears on the rail end face; carriage and rail share it, and the block keeps its graded smoothness, preload and accuracy on that matching same-model 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-HL-P-E-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.