Airtac LSH Linear Guide Rail LSH20BK-F2L-N-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-F2L-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-F2L-N-D-M6
This listing is the carriage alone from AirTAC's LSH series - a size 20 F2 flange block in the long body, normal (N) accuracy, M6 grease nipple, pairing code D. No rail is supplied with it. Inside the block, four rows of recirculating balls sit in X-shaped arc raceways cut at 45 degrees, so it takes up slight misalignment of the mounting face instead of binding and pushes back equally against loads from any of the four directions. A size 20 code on this series really does mean a 20 mm rail, so the mating rail is LSH20 width.
Per carriage, the long LSH20 body is rated 22.2 kN basic dynamic and 37.6 kN basic static, with allowable static moments of 0.35 kN.m MR and 0.34 kN.m MP and My. The static figure sits near 1.7 times the dynamic one - C0 looks like the safer number, but travel life is governed by C, so size the replacement on the dynamic rating first.
Airtac LSH Linear Guide Rail LSH20BK-F2L-N-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-F2L-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, bottom 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-F2L-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-F2L-N-D-M6 Is Used
Pick-and-place gantry rebuild
Swapping worn size 20 blocks on a pick-and-place gantry: the F2 flange bolts from underneath, so the carriage top face stays clear for tooling plates mounted above the axis.
Workshop router retrofit
Upgrading a hobby CNC router to a profile-rail axis: the long F2 body handles the plunge moment of a cutting head better than a standard-length block at the same rail size.
Laser cutter carriage swap
Replacing a seized block on a laser cutter's Y-axis without scrapping the rail - the pairing letter D on the old carriage identifies the matching LSH20 rail.
Is the Airtac LSH Linear Guide Rail LSH20BK-F2L-N-D-M6 the Right Guide?
Before ordering, confirm the form: this SKU is a replacement block, not a complete guide. If your duty is light and the envelope tight, AirTAC's LRM miniature series may do the job, though its load ratings are not published and we confirm them against your figures; if travel is short and you need crossed-roller stiffness rather than long recirculating travel, LGC is the cross-check. Step up to LSH25, or keep the long body, when moment governs. Run the checklist: carriage-only form, size 20 checked against dynamic load and moment together, F2 flange with screws from below, long body, N accuracy, M6 nipple, and pairing letter D taken off the old part. One caution for flange blocks: a side-mounted nipple can foul the carriage body, so check nipple clearance before bolting down.
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-F2L-N-D-M6 FAQ
Per carriage, LSH20 long: basic dynamic load C 22.2 kN, basic static load C0 37.6 kN, allowable static moments MR 0.35, MP 0.34 and My 0.34 kN.m, and normal-grade running parallelism of 12-37 um across the rail length band. The mating rail screws down with M5 bolts at 882, 588 and 441 N.cm into steel, cast iron and aluminium. Grease: 2.7 cm3 first charge per long carriage and 0.9 cm3 top-up, repeated every 100 km of travel or every 3 to 6 months.
No rail is included - this is the carriage only. The D is the pairing code, the letter that ties a carriage to its rail; a replacement block must carry the same letter as the rail it runs on. Read the letter off your old block or rail and match it before ordering.
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-F2L-N-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.