Airtac LSH Linear Guide Rail LSH20BK-HL-H-D-M6
The AirTAC Airtac LSH Linear Guide Rail LSH20BK-HL-H-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 lengthLong carriage
- AccuracyH — high 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 Rail LSH20BK-HL-H-D-M6
This listing is the AirTAC LSH20BK-HL-H-D-M6: a single square (H) long-body (L) carriage for the LSH20 profile rail, which measures 20 mm wide, supplied on its own - the rail is NOT part of this SKU. Inside, four rows of recirculating balls run in X-arranged arc raceways cut at 45 degrees, two contact points per ball, so the block carries load and overturning equally in all four directions and absorbs slight mounting-surface error instead of binding. It leaves the factory pre-greased with Mobilux EP2 and takes an M6 side nipple, which sits clear on a square block.
The long body is what you pay for here: against the standard LSH20 carriage, dynamic rating rises from 18.6 to 22.2 kN (about 19 percent) while MR grows from 0.27 to 0.35 kN.m, roughly 30 percent - moment climbs faster than load, which is exactly what a cantilevered tool plate needs. Static capacity is 37.6 kN, about 1.7 times the dynamic figure, so the static check rarely governs. Accuracy is H grade, holding running parallelism between 7 and 28 um over the rail length.
Airtac LSH Linear Guide Rail LSH20BK-HL-H-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Rail LSH20BK-HL-H-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 | 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 | H — high 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 Rail LSH20BK-HL-H-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. |
| L | Long carriage. |
| H | H — high 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 Rail LSH20BK-HL-H-D-M6 Is Used
Cantilevered camera arm on a packaging line
A vision camera hung off the end of a horizontal slide loads the block mainly in MR. The long square carriage's 0.35 kN.m rating, 30 percent above the standard block, often saves going up a rail size.
Z-axis block swap on a pick-and-place unit
When the original block on a pick-and-place Z slide starts to notch or grind, order this H-grade long carriage as a like-for-like replacement and quote pairing code D from the old rail so the new block runs at the original accuracy and smoothness.
Squeeze-up on a fluid dispensing gantry
Swapping a standard-length block for this long version on an existing LSH20 rail lifts MR from 0.27 to 0.35 kN.m and C from 18.6 to 22.2 kN without touching the mounting holes - a cheap stiffness gain on a dispensing head.
Is the Airtac LSH Linear Guide Rail LSH20BK-HL-H-D-M6 the Right Guide?
Start by confirming the form: BK in the code means carriage only, so you are buying the slider, not the guide. If the duty is light and the envelope tight, LRM may do the job at a smaller size, but its load ratings are not published, so we confirm them against your case before you commit. Where the load hangs off an arm, moment decides: if 0.35 kN.m of MR from one block is not enough, a second carriage on the same rail addresses tipping along the travel, or step up to LSH25 (MR 0.44 kN.m standard) rather than adding length. For short strokes needing crossed-roller stiffness instead of long recirculating travel, compare LGC. This code carries no preload position - preload is fixed when the carriage is matched to its rail. Order checklist: carriage-only form, size by load AND moment, square long body, H accuracy, M6 grease fitting, and pairing code D on both block and rail.
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 Rail LSH20BK-HL-H-D-M6 FAQ
Dynamic load rating C is 22.2 kN and static C0 is 37.6 kN per carriage; allowable static moments are MR 0.35, MP 0.34 and My 0.34 kN.m. H-grade running parallelism is 7 to 28 um over the rail length. Mount with M5 screws at 882 N.cm into steel, 588 into cast iron, 441 into aluminium. The block ships charged with 2.7 cm3 of Mobilux EP2; re-grease with 0.6 cm3 every 100 km of travel or every 3 to 6 months, whichever comes first.
No rail is supplied - this SKU is the carriage block only. AirTAC pairs carriages to LSH20 rails by a letter code; rails and carriages carrying the same letter run together at the intended accuracy and preload. Read the code off your existing rail or old block before ordering; a separately purchased rail must carry the same D.
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 Rail LSH20BK-HL-H-D-M6
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