Airtac LSH Linear Guide Rail LSH20BK-F1N-N-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F1N-N-D-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
- 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 LSH20BK-F1N-N-D-M6
This listing is the carriage alone: an AirTAC LSH20 top-flange (F1) block in standard length with an M6 grease nipple, normal accuracy grade and pairing code D. No rail is included and none is implied - you are buying the recirculating-ball block that bolts down through its flange onto a mating LSH20 profile rail 20 mm wide. Four rows of balls run in X-arranged 45 degree arc raceways with two contact points per ball, so the block carries equal load up, down and sideways and absorbs slight mounting misalignment inside itself instead of binding.
Per carriage the catalogue rates it at 18.6 kN dynamic (C) and 28.6 kN static (C0), with allowable moments of 0.27 (MR), 0.25 (MP) and 0.25 (My) kN.m. For a repair buy that matters twice over: renewing just the block on a sound rail costs roughly a quarter of a complete set, and normal grade keeps the running parallelism band at 12-37 um across the rail length.
Airtac LSH Linear Guide Rail LSH20BK-F1N-N-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-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 | 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 | N — normal 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-N-D-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. |
| 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 LSH20BK-F1N-N-D-M6 Is Used
CNC router gantry rebuild
A shop CNC router whose Y-axis carriage is brinelled from years of parking in one spot gets a straight swap: the new D-coded F1 block bolts down through its flange to the existing 20 mm rail, no re-machining.
Carton erector pusher slide
The pusher that squares each blank on a cartoning machine cycles millions of times a year; a matched spare carriage renews the slide in minutes without touching the rail alignment.
Pick-and-place head service
On an electronics pick-and-place gantry, a worn block shows up as placement drift; replacing the single carriage with a same-code unit restores the original 12-37 um normal-grade running parallelism.
Is the Airtac LSH Linear Guide Rail LSH20BK-F1N-N-D-M6 the Right Guide?
Decide the form first. This code buys the carriage alone, so it only makes sense over an existing, sound LSH20 rail; for a new axis, price the complete set, because that code is also where a preload grade (A none to C medium) is stated - and the tighter the preload, the less mounting error the assembled guide tolerates. For light duty in a small envelope, step down to LRM, whose load ratings are not published, so we confirm them against your duty. For short travel needing crossed-roller rigidity rather than long recirculating travel, step across to LGC. Moment-limited cantilevers may want the long LSH20L block, which lifts MR about 30 percent for about 19 percent more dynamic rating, or a step to LSH25.
Checklist: carriage-only form; pairing letter D shared by rail and block; size 20 sized on load and moment, not C alone; F1 top flange, standard length; normal accuracy; M6 nipple; and read the pairing code off the old rail end before you order.
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-N-D-M6 FAQ
Per carriage: dynamic load rating C 18.6 kN, static C0 28.6 kN, allowable moments MR 0.27 / MP 0.25 / My 0.25 kN.m. Normal accuracy gives a running parallelism of 12-37 um depending on rail length. The rail mounts on M5 screws at 882 N.cm in steel, 588 in cast iron or 441 in aluminium. Grease: 1.8 cm3 first charge, 0.6 cm3 top-up, every 100 km of travel or every 3 to 6 months; the oil option is 0.6 cm3 charged at 0.2 cm3/h.
No. The box contains the F1 top-flange carriage with M6 nipple only - no rail is included. Carriage and rail share a pairing code, here D, and only parts with the same letter are matched as a pair. Read the letter from the end marking of your existing rail or from the original delivery papers; if it is not D, this block is the wrong match.
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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-N-D-M6
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