Airtac LSH Linear Guide Block LSH20BK-F2L-P-D-M6
The AirTAC LSH Linear Guide Block LSH20BK-F2L-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 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-F2L-P-D-M6
This is a carriage only: one AirTAC LSH20 long bottom-flange (F2) block, precision (P) accuracy grade, pairing code D, with an M6 grease nipple. No rail is included and none is described here - order an LSH20 RLX rail carrying the same pairing letter D. The block runs on four rows of recirculating balls seated in 45 degree X-shaped arc raceways, so it carries equal load up, down and sideways, and self-alignment absorbs slight mounting-surface error instead of letting the guide bind. Size 20 means a 20 mm rail width.
The long body is the point of this code: it lifts the moment rating to 0.35 kN.m MR against 0.27 for the standard block, about 30 percent more, while dynamic rating rises from 18.6 to 22.2 kN, only about 19 percent. Static rating is 37.6 kN. For a cantilevered head, the moment figure usually decides before the load figure does. Each block ships charged with 2.7 cm3 of Mobilux EP2.
Airtac LSH Linear Guide Block LSH20BK-F2L-P-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-F2L-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 | 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 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-F2L-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. |
| 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-F2L-P-D-M6 Is Used
Coordinate measuring machine retrofit
A metrology shop replaces a worn long block on the X-axis of a bridge-style CMM, ordering a pairing-D rail to keep the P-grade 3-21 um running parallelism band intact.
PCB vision inspection gantry
The cantilevered camera head of an AOI machine tips as it travels; the long body's 0.35 kN.m MR carries the overhang where a standard block would run out of moment first.
Laser marker service swap
A maintenance team swaps a rumbling block on a fiber-laser marking gantry for this pairing-D carriage, restoring smooth travel without touching the sound 2 m rail.
Is the Airtac LSH Linear Guide Block LSH20BK-F2L-P-D-M6 the Right Guide?
Start by confirming the form: this is a carriage only, so the real question is which rail it will meet. Work from moment first - a long LSH20 block carries 0.35 kN.m MR, and if the head overhangs further, step to LSH25 where MR reaches 0.44 kN.m. If the envelope is tight and the duty light, LRM may do; its load ratings are not published, so we confirm them for you. Where travel is short and crossed-roller rigidity beats long recirculating travel, cross over to LGC. Checklist: carriage form and pairing code D, size chosen on load and moment together, F2 flange with long body, accuracy P, M6 nipple - and note that AirTAC advises against side-mounted fittings on flange carriages because the fitting can foul the body. Re-grease every 100 km of travel or every 3 to 6 months, whichever comes first; at a 300 mm stroke cycling once a second, the distance arrives in about two weeks of running, so the calendar rarely binds.
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-F2L-P-D-M6 FAQ
Basic dynamic load rating C 22.2 kN and static C0 37.6 kN per carriage. Allowable static moments: MR 0.35, MP 0.34 and My 0.34 kN.m. Running parallelism in P grade spans 3 to 21 um depending on rail length. Mount with M5 screws at 882 N.cm on steel, 588 N.cm on cast iron or 441 N.cm on aluminium. The long body holds 2.7 cm3 of Mobilux EP2 from new; top up 0.9 cm3 every 100 km of travel or every 3 to 6 months.
No rail is included - this is the carriage alone, and no preload is stated in a BK code. Pairing code D must match the rail: order an LSH20 RLX rail ending in D, or read the letter off your existing rail. Any LSH20 carriage fits any LSH20 rail of the same model and keeps its smoothness and accuracy, so the pairing letter is the only compatibility check needed. Also plan the lubrication path before mounting: side-mounted nipples are not recommended on this flange body.
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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-F2L-P-D-M6
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