Airtac LSH Linear Guide Block LSH20BK-F2N-P-B-M6
The AirTAC LSH Linear Guide Block LSH20BK-F2N-P-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
- 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-B-M6
This SKU is a single precision-grade AirTAC LSH20 carriage: bottom-flange (F2) mounting, standard length, accuracy P, pairing code B, with an M6 grease nipple fitted. It ships WITHOUT a rail - order the rail separately under the same pairing letter. The block rides on four ball rows seated in 45 degree X-configured arc raceways, two contact points per ball, so load is shared equally in every direction and small flatness errors in the machine table are taken up inside the carriage rather than forcing the guide.
Accuracy P places running parallelism in the 3-21 um band, the tightest the LSH series offers - though the exact figure depends on the length of the rail it is finally mounted on. Per block the ratings are 18.6 kN dynamic, 28.6 kN static, with 0.27 kN.m MR and 0.25 kN.m MP and My. If the rebuild needs more moment headroom, the LSH25 standard carriage lifts MR to 0.44 kN.m, about 63 percent, for a single part.
Airtac LSH Linear Guide Block LSH20BK-F2N-P-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-F2N-P-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 | 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 listed 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-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. |
| 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-B-M6 Is Used
Granite plate slide refit
A metrology lab rebuilding the traverse slide on a granite surface plate specifies P grade for the 3-21 um parallelism band, tight enough for indicator-based comparison work.
Laser marking head service
The Z-axis stage of a fibre laser marker holds focus by position; a precision carriage on the existing B-coded rail restores travel quality without replacing the whole axis.
Milling machine axis overhaul
During a knee-mill or machining-centre axis rebuild, fitting P-grade blocks to a freshly ground or scraped rail brings the axis back to tight running tolerances.
Is the Airtac LSH Linear Guide Block LSH20BK-F2N-P-B-M6 the Right Guide?
Decide the form first: a precision block alone is only half a solution, so plan the rail order in the same letter. Step down to LRM when the load is light and space is scarce; its ratings are unpublished, so we confirm them on request. Step up when the moment governs: the long LSH20 body raises MR to 0.35 kN.m, about 30 percent more, while dynamic rating gains only about 19 percent - a reminder that moment usually decides cantilevered applications, not C. For short travels where crossed-roller rigidity beats long recirculating travel, price LGC alongside. Match checklist: form (set / carriage / rail), size by load and moment, carriage style and length, count and rail length, accuracy grade, preload and its installation trade-off (sets only), grease fitting, and the pairing letter - B here - matched between rail and carriage or read off the original part.
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-B-M6 FAQ
Dynamic C 18.6 kN and static C0 28.6 kN per block; moments MR 0.27 kN.m, MP 0.25 kN.m, My 0.25 kN.m. Precision grade sets running parallelism in the 3-21 um band, the value depending on the rail length it is finally fitted to. Mounting: M5 rail screws at 882 N.cm steel, 588 N.cm cast iron, 441 N.cm aluminium. Grease: 1.8 cm3 initial fill, 0.6 cm3 top-up, interval 100 km of travel or 3 to 6 months, Mobilux EP2 or equivalent.
It does not - the SKU is the carriage only, so budget a separate rail order. Pairing B is the matching letter between rail and carriage: both parts must show B for the pair to run with correct preload, accuracy and smoothness. If you are replacing a block, read the code off the old carriage or the rail end; ordering a different letter risks a loose or rough-running assembly.
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-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.