Airtac LSH Linear Guide Rail LSH20BK-F1L-N-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F1L-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 lengthLong 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-F1L-N-D-M6
Listing form: carriage only. You get one AirTAC LSH20BK long top-flange block, grade N accuracy, fitted with an M6 grease fitting and matched to any LSH20 rail carrying pairing code D. The rail is not part of this SKU. Four rows of recirculating balls ride in opposed X-shaped arc raceways cut at 45 degrees into the profile rail, giving near-equal capacity upward, downward and sideways and letting the block absorb small mounting-surface errors instead of binding. The rail under this size is 20 mm wide, matching the size code at this point in the range.
Per block, the long carriage is rated 22.2 kN dynamic, 37.6 kN static, with moment limits of 0.35 kN.m on MR and 0.34 kN.m on MP and My. Lengthening the body from the standard LSH20 block added roughly 30 percent of moment capacity but only about 19 percent of dynamic rating, so a cantilevered load should be checked against MR first. Static runs about 1.7 times dynamic here; size travel duty on C, not on the bigger C0 figure.
Airtac LSH Linear Guide Rail LSH20BK-F1L-N-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F1L-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 | Long carriage |
| Basic dynamic load rating C | 22.2 kN per carriage |
|---|---|
| Basic static load rating C0 | 37.6 kN per carriage |
| Allowable static moment | MR 0.35 / MP 0.34 / My 0.34 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-F1L-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. |
| L | Long 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-F1L-N-D-M6 Is Used
Plasma table gantry refit
On a CNC plasma cutting table the carriages near the torch wear out first. Fitting this long F1 block, matched to the existing code D rail, brings the gantry back to smooth travel without re-laying or re-shimming the rail.
Pallet stop station
Indexing pallet conveyors on an automotive trim line halt hard at each station; this block's 37.6 kN static rating and 0.34 kN.m My rating absorb the stop shock as a straight replacement for a spalled original.
Router Z-slide
A CNC router's Z-slide sees constant shock from cutting, and the long body's 0.35 kN.m MR covers the overturning moment of a spindle-mounted bracket better than a standard-length block would.
Is the Airtac LSH Linear Guide Rail LSH20BK-F1L-N-D-M6 the Right Guide?
Size from the moment as well as the load. If the duty is light and space is scarce, step down to AirTAC LRM - its load ratings are not published, so we confirm them with the factory before you commit. If travel is short and you want crossed-roller rigidity over long recirculating-ball travel, LGC is the step across. Stay on LSH20 long when a cantilever governs: this body carries 0.35 kN.m of MR, and stepping up to LSH25 buys MR 0.44 kN.m, about 63 percent more in one part - often a better fix than a second carriage.
Order checklist: this is carriage only, so read the pairing letter D off your rail and match it; size by load and moment together; confirm the long F1 top-flange body and N accuracy; the M6 fitting is the correct family for size 20; and inspect the old rail for scoring first, because a fresh block on a worn rail never reaches its grade. Preload is not a code position on a carriage-only part - the pairing letter handles the match - but if you ever order a complete set instead, remember each step up in preload narrows the allowable mounting error.
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-F1L-N-D-M6 FAQ
Per carriage: dynamic load rating C 22.2 kN, static C0 37.6 kN, allowable moments MR 0.35 kN.m, MP 0.34 kN.m, My 0.34 kN.m. N-grade running parallelism sits in a 12-37 um band depending on rail length. Rail mounting screws are M5, torqued to 882 N.cm in steel, 588 in cast iron, 441 in aluminium. Lubrication: 2.7 cm3 first charge, 0.9 cm3 per top-up of Mobilux EP2 or equivalent, repeated every 100 km of travel or every 3 to 6 months, whichever comes first.
No. LSH20BK means carriage only: one long F1 top-flange block at N accuracy, no rail and no mounting screws. The pairing letter D in the code must match the D on your existing LSH20 rail; read it off the old carriage or the rail stamping before you order. Rails are listed separately under the LSH20RL 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 LSH20BK-F1L-N-D-M6
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