Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-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 Rail LSH25BK-F2N-P-B-M6
A precision-grade replacement block: AirTAC LSH25 bottom-flange carriage, F2 style, standard length, P accuracy, M6 grease nipple, pairing code B. This is the carriage only - the rail is not part of the delivery. Four rows of recirculating balls run at a 45 degree contact angle in crossed arc raceways, equal capacity in all four directions, with self-alignment that absorbs slight seat errors within the limits the size allows.
The P grade is the reason to pick this code over an N block: assembled with a P rail, running parallelism tightens to the 3-21 um band, against 12-37 um for normal grade. Per-carriage ratings stay at 26.9 kN dynamic and 39.4 kN static, with 0.44 kN.m MR and 0.38 kN.m MP and My. Accuracy is only realised if the rail is pulled flat against its datum face and torqued correctly - the manufacturer flags this as a major influence on the achieved result.
Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-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 | 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-F2N-P-B-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 Rail LSH25BK-F2N-P-B-M6 Is Used
Metrology lab probe bench
A gauge-calibration bench in a metrology lab moves a probe carriage over a fixed span all day. The P grade's 3-21 um parallelism band, paired with a P rail, keeps the probe path repeatable between annual calibrations.
Display glass handling frame
A glass-panel handling frame in a display factory needs its edge guides flush with the frame top, so the F2 flange bolts from underneath. Precision grade limits runout so the vacuum cups pick panels without skew.
Solder paste dispensing gantry
A solder-paste dispensing head on a PCB gantry cycles short, fast strokes continuously. The distance-based grease interval arrives quickly at that duty, so the M6 nipple is serviced on the calendar too, at least every 3 to 6 months.
Is the Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-M6 the Right Guide?
Buy P when the machine's drawing demands it, not out of habit: metrology frames, precision stages, and any rebuild where the original spec calls a P rail. The carriage and the rail must both be P and share pairing code B for the tighter parallelism to hold. Light duty in a compact envelope can step down to LRM, whose load ratings are unpublished, so we confirm them for your duty. Short-stroke work needing crossed-roller stiffness steps across to LGC, and moment-heavy cantilevers step up to the long LSH25L body at 0.58 kN.m MR. Ordering checklist: carriage only, no rail; size 25 (23 mm rail width); F2 bottom flange; standard length; P accuracy; M6 nipple; pairing code B.
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-P-B-M6 FAQ
Per carriage: C 26.9 kN dynamic, C0 39.4 kN static, moments MR 0.44, MP 0.38, My 0.38 kN.m. Accuracy grade P: assembled running parallelism in the 3-21 um band by rail length (normal grade spans 12-37 um). Rail mounting: M6 screws at 1370 N.cm into steel, 921 cast iron, 686 aluminium. Lubrication: Mobilux EP2 pre-fill of 3.6 cm3, top-up 1.1 cm3, every 100 km or every 3 to 6 months. If oil is preferred, size 25 starts at 0.9 cm3 with a 0.3 cm3/h feed rate.
It is a carriage only. BK marks the block; no rail ships with it and the code should never be read as a complete set. The pairing letter B ties this block to a B-coded rail, and mismatched codes give up the rated running quality. The P accuracy claim also depends on the rail: a P block running over an N rail produces N-grade travel. Confirm the grade and code stamped on your existing rail before ordering, and note the carriage code carries no preload position - that is specified on complete-set codes.
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Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LSH Linear Guide Rail LSH25BK-F2N-P-B-M6
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