Airtac LSH Linear Guide Rail LSH20BK-F1N-H-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F1N-H-B-M6 is a standard-type profile linear guide on a 20 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
- SizeLSH20
- Rail width20 mm
- Carriage lengthStandard carriage
- AccuracyH — high 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 LSH20BK-F1N-H-B-M6
One AirTAC LSH20 standard-length top-flange (F1) carriage, high (H) accuracy, M6 grease fitting, pairing code B - and no rail. This listing sells the block alone; the hardened profile rail it rides must be ordered separately as an LSH20RLX with the same B letter. Four ball rows contact 45 degree X-shaped arc raceways, so the block resists up, down and side loads equally and self-aligns over minor surface errors. The rail it runs on is 20 mm wide, matching the size code exactly.
High grade holds running parallelism within a 7-28 um band across the rail-length range - comfortably tight for general machine building. Ratings per carriage: C 18.6 kN dynamic, C0 28.6 kN static, moments 0.27 / 0.25 / 0.25 kN.m (MR / MP / My). Because any same-model carriage fits any same-model rail and keeps its accuracy, this block drops onto an existing B-coded rail as a like-for-like repair without touching the machine geometry.
Airtac LSH Linear Guide Rail LSH20BK-F1N-H-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F1N-H-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Flange, top mounting |
| Carriage length | Standard carriage |
| Basic dynamic load rating C | 18.6 kN per carriage |
|---|---|
| Basic static load rating C0 | 28.6 kN per carriage |
| Allowable static moment | MR 0.27 / MP 0.25 / My 0.25 kN·m |
| Accuracy grade | H — high grade |
| Mounting screws | M5 — 882 N·cm into steel, 588 cast iron, 441 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 LSH20BK-F1N-H-B-M6
| LSH | LSH Series Linear Guide. |
|---|---|
| 20 | Size code. |
| 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. |
| H | H — high 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 LSH20BK-F1N-H-B-M6 Is Used
Form-fill-seal guard slide
The guard door on a form-fill-seal machine slides on 20 mm rails; when washdown grime seizes a block, this F1 carriage restores the motion without relaying the rail, provided the B code matches.
Welding fixture slide on extrusion
An aluminium-extrusion welding jig carries its clamping beam on 20 mm rail; the top-flange bolt pattern fixes straight into the T-slot plate, and the 7-28 um H-grade band is ample for a fixture that locates rather than measures.
Sliding-table saw fence carriage
The support carriage under a sliding-table saw's fence beam takes downward and side loads in equal measure - the four-row X geometry suits that mixed loading, and the flange base bolts down onto the beam.
Is the Airtac LSH Linear Guide Rail LSH20BK-F1N-H-B-M6 the Right Guide?
For a light, small-envelope duty, compare LRM first - its load ratings are not published the same way, so we will confirm them for your application before you order. If the 0.27 kN.m moment is short for an overhung load, stepping up to LSH25 (MR 0.44 kN.m, roughly 63 percent more) usually beats adding a second block, which mainly counters tipping along the rail rather than overhung moment. Short travel with a need for crossed-roller rigidity points to LGC instead.
Ordering checklist: carriage-only form, rail separate; size 20 checked against both load and moment; F1 flange, standard length; H accuracy; M6 nipple; pairing code B shared with the rail. If the rebuild calls for a specific preload grade, raise it at enquiry - preload is not selectable in this block code. A side nipple on a flange block may stand proud or foul the mating part, so check the fit before final 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 LSH20BK-F1N-H-B-M6 FAQ
Size 20 standard carriage: dynamic C 18.6 kN, static C0 28.6 kN, moments MR 0.27, MP 0.25, My 0.25 kN.m. High grade running parallelism: 7-28 um band. Rail screws: M5, torqued to 882 N.cm on steel, 588 on cast iron, 441 on aluminium - pulling the rail flat against its datum face is what actually achieves the accuracy. Grease per carriage: 1.8 cm3 first charge, 0.6 cm3 top-up, repeated every 100 km of travel or every 3 to 6 months.
No rail is included - this is a carriage-only purchase. The trailing letter B is the pairing code: it must appear on both the LSH20 carriage and the LSH20RLX rail for the two to work together as specified, so take it from the stamping on your existing part. If the old rail carries a different letter, order the block with that letter instead; the mechanics are identical, the code simply guarantees the matched pair.
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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 Rail LSH20BK-F1N-H-B-M6
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