Airtac LSH Linear Guide Block LSH20BK-HN-P-B-M6
The AirTAC LSH Linear Guide Block LSH20BK-HN-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-HN-P-B-M6
This listing is a precision-grade carriage from the AirTAC LSH20 family - square (H) body, standard (N) length, accuracy grade P, M6 side nipple, pairing code B. It is the block only; there is no rail in the box. Four rows of recirculating balls ride 45 degree X-shaped arc raceways, two contact points each, sharing load equally in all four directions and self-aligning against small mounting errors within the catalogue limits.
The P grade is the reason to pick this SKU over an N block: running parallelism tightens from the N band of 12-37 um to 3-21 um, which matters directly on a measuring or optical axis. Load figures per carriage are unchanged - 18.6 kN dynamic (C), 28.6 kN static (C0), moments MR 0.27, MP 0.25, My 0.25 kN.m. Remember that a carriage-only code carries no preload setting; the running preload results from the matched rail-and-carriage combination, so the B code on both parts is what preserves it.
Airtac LSH Linear Guide Block LSH20BK-HN-P-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-HN-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 | Square (compact) |
| 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-HN-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-HN-P-B-M6 Is Used
Optical inspection stage rebuild
A bench-top optical inspection machine whose slide must hold a camera steady over 300 mm of travel gains from the 3-21 um P-grade parallelism band - visibly steadier focus than an N block gives.
Alignment fixture for weldments
A jig that locates tube or extrusion weldments under a laser tracker needs repeatable carriage position; a precision block with pairing code B keeps the fixture's datum inside the tolerance the tracker sees.
Laser head carriage upgrade
Upgrading a CO2 laser cutter's X carriage from N to P grade sharpens beam positioning along the cut; the 18.6 kN dynamic rating per carriage is unchanged, so no frame or drive changes are needed.
Is the Airtac LSH Linear Guide Block LSH20BK-HN-P-B-M6 the Right Guide?
Choose this block when the rail is sound but the accuracy has drifted, or when upgrading an N-grade axis that now feeds a vision system or probe. Down-sizing: if the loads are modest and space scarce, the LRM series is smaller, though its ratings are unpublished and we confirm them per enquiry. Up-sizing for moment: LSH25 lifts MR to 0.44 kN.m from 0.27, a 63 percent jump for one size. Across-sizing: where travel is short and crossed-roller rigidity beats long recirculating travel, LGC is the better fit.
Checklist for a correct order: carriage-only form confirmed; load AND moment both checked; square standard body and P accuracy as required; pairing code B matching your rail; M6 fitting on a size that takes the M6 family. Note that achieved precision also depends on the rail being pulled flat to its datum and torqued right, and on bolt caps seated flush so swarf never enters the ball circuit.
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-HN-P-B-M6 FAQ
Accuracy: P grade tightens running parallelism to 3-21 um, against 12-37 um for N. Loads stay as per the LSH20 standard carriage: C 18.6 kN, C0 28.6 kN, and moment ratings MR 0.27, MP 0.25, My 0.25 kN.m per block. The mating rail bolts down with M5 screws at 882 N.cm into steel, 588 into cast iron, 441 into aluminium. Grease is Mobilux EP2 or equivalent: 1.8 cm3 first fill, 0.6 cm3 top-up every 100 km of travel or every 3 to 6 months.
It is not a complete guide - the box holds one precision carriage, no rail, no screws. Preload is likewise not set by this code alone; it emerges from the matched rail-and-carriage pair. That is what the B pairing code is for: an LSH20 rail and an LSH20 carriage must share the letter, and matched parts keep their rated smoothness, preload and accuracy. If you are replacing a block, copy the B (or other letter) off the original; if you cannot read it, send us the old carriage and we will confirm.
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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-HN-P-B-M6
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