Airtac LSH Linear Guide Block LSH20BK-F2N-P-E-M6
The AirTAC Airtac LSH Linear Guide Block LSH20BK-F2N-P-E-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
- 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 Block LSH20BK-F2N-P-E-M6
LSH20BK-F2N-P-E-M6 is a single AirTAC LSH carriage, not a set: one bottom-flange F2 block, standard length, precision accuracy, with an M6 grease fitting and no rail in the box. The ball circuit carries four rows of balls at 45 degree X-shaped arc raceways, two contact points per ball, so the block resists loads and overturning equally from all four directions and absorbs small errors in the mounting surface instead of binding. It runs on any LSH20 rail of the same model, whose width is a true 20 mm.
The ratings per block are C 18.6 kN dynamic, C0 28.6 kN static and 0.27 / 0.25 / 0.25 kN.m of MR / MP / My, with P-grade parallelism in the 3-21 um band. Replacing a worn carriage costs about a quarter of a complete set, so when the rail is straight and its raceways are sound, this is the economic repair - provided you know the pairing letter, which here is E.
Airtac LSH Linear Guide Block LSH20BK-F2N-P-E-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-F2N-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 | LSH20 |
| Rail width | 20 mm |
| Carriage style | Flange, bottom 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 | P — precision 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 Block LSH20BK-F2N-P-E-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. |
| 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 Block LSH20BK-F2N-P-E-M6 Is Used
Pick-and-place gantry carriage swap
A palletising gantry whose standard block has developed play keeps its Z-bracket mounting unchanged: the F2 flange bolts up from below and the E-coded rail accepts the new block as supplied.
Laser cutting table rail maintenance
On a laser cutter where the rail is sound but the block is worn, replacing only the carriage restores travel without a rail change, and a fresh Mobilux EP2 charge is pushed in before the first stroke.
Workshop press feed slide repair
A machine-shop feed slide rebuilt around its existing rail: one new P-grade block and a correctly torqued re-mount bring the running parallelism back inside the 3-21 um band.
Is the Airtac LSH Linear Guide Block LSH20BK-F2N-P-E-M6 the Right Guide?
Size the replacement against both the dynamic rating C, which governs travel life, and the moment ratings, which govern tipping. C0 looks bigger at 28.6 kN, but static figures sit around 1.5 times the dynamic across this range, so do not size on it alone. If the duty needs more moment than 0.27 kN.m, a long carriage lifts MR roughly 30 percent, to 0.35 kN.m, against only about 19 percent more dynamic load; a step to LSH25 or a second block are the other levers. Lighter, compact duties may belong on LRM instead - we confirm its unpublished load figures for you - and short-travel jobs needing crossed-roller stiffness point to LGC.
Checklist: carriage form; size 20; F2 flange bolting from below; standard length; P accuracy; M6 fitting; E pairing code matched to the rail letter.
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 Block LSH20BK-F2N-P-E-M6 FAQ
Per carriage: C 18.6 kN, C0 28.6 kN, moments MR 0.27 / MP 0.25 / My 0.25 kN.m, P-grade running parallelism 3-21 um. Rail screws are M5 at 882 / 588 / 441 N.cm for steel / cast iron / aluminium. Grease is Mobilux EP2 or equivalent: 1.8 cm3 first charge, 0.6 cm3 per top-up, re-applied every 100 km of travel or 3 to 6 months. The M6 fitting belongs to the size 20 fitting family.
One carriage and nothing else: no rail, no screws, no mounting hardware. The E near the end of the code is the pairing letter that ties this block to a matching LSH20 rail of the same model; a block and rail with different letters will not deliver the intended preload or accuracy. If you are replacing a worn block, read the code off the old carriage or the original set order and match the letter.
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 Block LSH20BK-F2N-P-E-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.