Airtac LSH Linear Guide Block LSH20BK-HN-P-C-M6
The AirTAC LSH Linear Guide Block LSH20BK-HN-P-C-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-C-M6
A precision (P) square carriage from AirTAC's LSH20 series, sold as the block alone - no rail is supplied. Size 20 means a true rail width of 20 mm; the square (H) body is the standard (N) length, greased through an M6 side nipple, and the C in the code is the pairing letter your rail must match. The internals are the LSH signature: four ball rows in 45 degree X-shaped arc raceways, two contact points per ball, equal capacity in every direction and self-alignment that absorbs slight mounting-surface error without binding.
For a load hung off the side of the carriage, the moment column is the one to watch: MR 0.27, MP 0.25 and My 0.25 kN.m per block, alongside 18.6 kN dynamic (C) and 28.6 kN static (C0). If your cantilever needs more than 0.27 kN.m of roll moment, this size will not stretch to it - step to LSH25 or add a second carriage. The P accuracy grade holds running parallelism to 3-21 um, so a probe or spindle carried on this block also lands repeatably, provided the rail beneath is torqued flat to its datum.
Airtac LSH Linear Guide Block LSH20BK-HN-P-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-HN-P-C-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-C-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-C-M6 Is Used
Cantilevered drilling spindle carrier
A small drilling unit whose spindle overhangs the carriage side works the roll moment; this P-grade block holds 0.27 kN.m of MR and keeps the spindle's lateral position within a 3-21 um parallelism band.
Electronics dispensing head slide
A glue-dispensing head on a PCB line tracks a precise path over the board; replacing the worn carriage with a precision block restores dot placement without requalifying the whole machine.
Metrology fixture on a granite base
A fixture carriage sliding on a granite-mounted LSH20 rail benefits from the self-aligning four-row geometry and P-grade running parallelism when parts are presented to a height gauge or probe.
Is the Airtac LSH Linear Guide Block LSH20BK-HN-P-C-M6 the Right Guide?
This code suits a precision rebuild where the rail is proven but the carriage is worn, or a cantilevered detail - a spindle, camera or dispenser - that must hold position as well as load. Down a size: LRM fits lighter, tighter envelopes, but its load ratings are not published, so let us confirm them first. Up a size: LSH25 raises MR from 0.27 to 0.44 kN.m, roughly 63 percent, which usually solves a marginal cantilever for less than a redesign. Short travel and a need for crossed-roller stiffness points across to LGC.
Order with this checklist: form is carriage only; size chosen on load AND moment; square standard body, P accuracy (3-21 um band); pairing code C matching the rail; M6 fitting, correct for sizes 20 to 35. If you are replacing a part, the C code is the one fact you must carry over from the old carriage.
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-C-M6 FAQ
Within its moment ratings: MR 0.27, MP 0.25 and My 0.25 kN.m per carriage, with 18.6 kN dynamic (C) and 28.6 kN static (C0). Beyond that roll moment, move to LSH25 or run two carriages. P grade gives running parallelism of 3-21 um. The mating rail uses M5 screws at 882 N.cm into steel, 588 into cast iron, 441 into aluminium. Grease: 1.8 cm3 initial charge, 0.6 cm3 top-ups every 100 km of travel or every 3 to 6 months, Mobilux EP2 or equivalent.
You receive one precision square carriage - no rail, no screws, no preload setting, since preload is not a position in a carriage-only code and results from the matched pair. C is the pairing letter: an LSH20 rail and carriage must share it for the rated smoothness, preload and accuracy to hold. A carriage with another letter may slide, but it will not meet the specification. Copy the C off your existing rail or carriage when ordering, or send us the old part and we will read it for you.
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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-C-M6
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