Airtac LSH Linear Guide Block LSH20BK-F2N-P-D-M6
The AirTAC LSH Linear Guide Block LSH20BK-F2N-P-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 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-D-M6
This is the carriage only from the AirTAC LSH range: a bottom-flange (F2) block, standard length, precision (P) accuracy, M6 grease fitting, supplied without any rail. The F2 flange bolts through from below, so the top face of the carriage stays clear for tooling, covers or a load plate. The D at the end of the code is a pairing letter, not a size. Inside, four rows of balls run in X-shaped 45 degree arc raceways with two contact points per ball, giving the block equal capacity in every direction and enough self-alignment to absorb slight mounting error on the matching LSH20 rail, whose true width is 20 mm.
Per carriage the catalogue rates this standard-length size 20 block at C 18.6 kN dynamic, C0 28.6 kN static, with allowable moments of 0.27 / 0.25 / 0.25 kN.m for MR / MP / My. P grade running parallelism sits in the 3-21 um band. Because the flange mounts from beneath, a swarf shield or bellows can sit over the carriage top without fouling the bolts.
Airtac LSH Linear Guide Block LSH20BK-F2N-P-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-F2N-P-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 | 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-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. |
| 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-D-M6 Is Used
CMM axis rebuild
A coordinate measuring machine axis rebuilt with a P-grade block keeps its 3-21 um parallelism band, and the bottom flange leaves the top face free for the probe bracket.
Under-mounting on a chip-laden CNC
Bolting from below on a milling machine X-axis keeps the carriage top clear of chips and coolant, with the ZZ scraper-plus-wiper option available to order for the dirtiest enclosures.
Optical inspection stage retrofit
Swapping a worn block on a microscope inspection stage: an existing D-coded rail takes this block directly, restoring smooth P-grade travel without re-machining the base.
Is the Airtac LSH Linear Guide Block LSH20BK-F2N-P-D-M6 the Right Guide?
Start from the load and the moment, not the size code. For light duties in a tight envelope, step down to AirTAC LRM - its load ratings are not published in the same way, so we confirm them against your duty before you order. If 0.27 kN.m of MR is the binding figure, moving one size up to LSH25 N raises MR to 0.44 kN.m, about 63 percent, with a single carriage, while adding a second block on the rail addresses tipping along the travel instead. Where travel is short and you need crossed-roller rigidity rather than long recirculating ball travel, LGC is the step across.
Match checklist: carriage-only form; size 20 chosen by both load and moment; F2 bottom flange; standard length; one block; P accuracy; M6 fitting from the size 20 family; and the D pairing code, which must match the letter on your existing rail - quote the code off the original part when replacing.
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-D-M6 FAQ
Dynamic C 18.6 kN and static C0 28.6 kN per carriage - static runs roughly 1.5 times the dynamic figure across this range. Allowable moments are MR 0.27, MP 0.25 and My 0.25 kN.m. P grade running parallelism is 3-21 um depending on rail length. Mount the mating rail with M5 screws torqued to 882 N.cm on steel, 588 on cast iron, 441 on aluminium. The carriage arrives filled with Mobilux EP2 (1.8 cm3 first charge, 0.6 cm3 per top-up) and needs re-greasing every 100 km of travel or every 3 to 6 months, whichever comes first.
No rail is included - LSH20BK-F2N-P-D-M6 is the carriage block only. The D is the pairing code: your replacement block must carry the same letter as the rail it will run on, so check the code on your existing rail or the original order before buying. A block and rail of the same model with the same letter run together at the intended smoothness, preload and accuracy.
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-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.