Airtac LSH Linear Guide Rail LSH20BK-F2N-N-B-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F2N-N-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
- 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-F2N-N-B-M6
This is a carriage-only listing: one AirTAC LSH20 standard-length block with bottom-flange mounting, normal accuracy grade and an M6 grease nipple, and nothing else in the box - no rail is supplied. It is the part to quote when the B-coded rail in your machine is still serviceable but the block has developed scored or lumpy travel. The recirculating ball set runs in four rows of X-pattern 45 degree arc grooves, so the block carries the same rating downward, upward and sideways and tolerates small datum errors through its internal self-alignment. Size 20 corresponds to a 20 mm rail width.
Normal grade holds running parallelism within a 12-37 um band across the rail-length range - ample for packaging, handling and general automation axes. Ratings per block are 18.6 kN dynamic and 28.6 kN static, with 0.27 / 0.25 / 0.25 kN.m of allowable moment (MR / MP / My). A practical point: buying the block alone costs about a quarter of a complete guide set, which is why most maintenance teams hold the carriage as the spare, not the set.
Airtac LSH Linear Guide Rail LSH20BK-F2N-N-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F2N-N-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, 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 | 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-F2N-N-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. |
| 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-F2N-N-B-M6 Is Used
Sorter diverter shoe guide
Diverter shoes on a parcel-sort conveyor glide on short guide sections. A fresh B-coded block restores smooth shoe motion and stops the snagging that misroutes packages.
Welding fixture slide carriage
A weld fixture's clamp slide takes spatter and heat cycling season after season. Replacing the block keeps the fixture's repeatable clamp position without re-machining the table.
Machine-guard sliding door renewal
The sliding guard door on a milling machine sticks at mid-travel. A new bottom-flange block, bolted from below so the door skin stays flush, frees the movement in minutes.
Is the Airtac LSH Linear Guide Rail LSH20BK-F2N-N-B-M6 the Right Guide?
Run this checklist before you buy: confirm the form - carriage only, rail not included; confirm the pairing letter B on the original part; check the bottom-flange hole pattern against your drawing; decide body length (standard here; the long LSH20 body raises MR from 0.27 to 0.35 kN.m, about 30 percent, if your load overhangs the block); set the count per axis and the rail length if you need those too; and pick accuracy - the normal grade's 12-37 um band suits this machine class, with H available if you later need tighter travel. For lighter duties in a smaller footprint, LRM is the step down, though its load ratings are not published, so we confirm them case by case. Where the axis travels only a short distance and crossed-roller rigidity beats long recirculating travel, LGC is worth a look. If the rail itself is worn, a complete LSH20 set is the cleaner fix than a single block.
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-F2N-N-B-M6 FAQ
Dynamic load rating C is 18.6 kN; static C0 is 28.6 kN; allowable static moments are 0.27 kN.m MR, 0.25 kN.m MP and 0.25 kN.m My. Normal grade running parallelism spans 12-37 um. The mating rail is fixed with M5 screws at 882 / 588 / 441 N.cm in steel / cast iron / aluminium. Factory grease charge is 1.8 cm3 of Mobilux EP2, topped up with 0.6 cm3 every 100 km of travel or every 3 to 6 months.
No - it is the carriage only. You receive one F2 bottom-flange block, standard length, normal grade, with its M6 nipple. The letter B is the pairing code, and your rail must show the same letter for the block to seat and run correctly. LSH20 carriages of this model interchange with LSH20 rails of the same model, so any sound B-coded rail will take this block, but read the code off your original part first.
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 Rail LSH20BK-F2N-N-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.