Airtac LSH Linear Guide Block LSH20BK-HL-P-B-M6
The AirTAC Airtac LSH Linear Guide Block LSH20BK-HL-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 lengthLong 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-HL-P-B-M6
Precision is the reason this SKU exists. The AirTAC LSH20BK-HL-P-B-M6 is one long square carriage in the LSH size 20 series, supplied as a block with no rail included - the rail is ordered separately or already sits in your machine. Inside, four rows of balls run in crossed 45 degree arc raceways with two-point contact per ball, so down-load, lift-off and side load all rate identically, and slight mounting error is taken up inside the block rather than appearing as stiction. The mating rail is a true 20 mm wide.
The P grade holds running parallelism within 3-21 um over the rail length, against 12-37 um for the normal grade - that difference is what you pay for on an inspection or measuring axis. Ratings are unchanged by grade: 22.2 kN dynamic and 37.6 kN static per carriage, because grade tightens geometry tolerance, not capacity. The matching rail must be B-coded and cut within the 4040 mm maximum length for size 20.
Airtac LSH Linear Guide Block LSH20BK-HL-P-B-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-HL-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 | 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 | 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 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 Block LSH20BK-HL-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. |
| L | Long 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-HL-P-B-M6 Is Used
Optical inspection stage retrofit
An older vision inspection bench is rebuilt around a P-grade long carriage, holding 3-21 um of running parallelism for repeatable camera positioning over the full stroke.
Granite metrology rail re-fit
A measurement lab re-pairs the carriage on its straight-edge axis: precision grade block matched to a B-coded rail, with M5 screws torqued to 882 N.cm into the steel sub-plate.
Dispensing head on a fast XY table
A fluid dispense axis running up to 60 m/min stays within grease lubrication limits, and the P-grade long body resists pitch under the sensor-mounted head better than a standard block.
Is the Airtac LSH Linear Guide Block LSH20BK-HL-P-B-M6 the Right Guide?
Grade selection is a money question: normal grade runs 12-37 um of parallelism, precision 3-21 um, so specify P only when the process resolves below roughly 12 um. If your duty is lighter and more compact than size 20, LRM is the smaller alternative - we confirm its unpublished ratings for you. For short strokes where crossed-roller rigidity beats long recirculating travel, look at LGC. And if a single LSH20 carriage runs out of moment even in the long body, move up to LSH25, whose rail is 23 mm wide.
Match checklist: form (carriage only), size by load and moment, style and length, carriage count and rail length for the set you build, accuracy grade against cost, and preload - chosen on the complete set - which tightens the mounting tolerance: medium preload cuts the permitted height error on size 20 from 130 to 50 um, close to three times. Then the grease fitting and the B pairing code your rail must carry.
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-HL-P-B-M6 FAQ
Load capacity per carriage: C 22.2 kN dynamic, C0 37.6 kN static; static moments 0.35 kN.m MR, 0.34 kN.m MP, 0.34 kN.m My. The precision grade holds running parallelism between 3 and 21 um across the rail length range. Fastening: M5 screws at 882 N.cm into steel, 588 cast iron, 441 aluminium. Lubrication: 2.7 cm3 initial charge, 0.9 cm3 top-up, repeated every 100 km of travel or every 3 to 6 months.
It is not. This SKU supplies the carriage alone - a long square, precision-grade size 20 block with an M6 fitting - and no rail. Pairs are built by matching the pairing letter: this carriage needs a B-coded size 20 LSH rail. If you are starting from scratch, order a complete-set code instead, where block and rail arrive as one matched unit.
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-HL-P-B-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.