Airtac LSH Linear Guide Block LSH20BK-HL-P-C-M6
The AirTAC Airtac LSH Linear Guide Block LSH20BK-HL-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 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-C-M6
The self-aligning behaviour of an LSH carriage is what rescues an imperfect mounting surface, and this precision-grade block keeps that property. AirTAC LSH20BK-HL-P-C-M6 is a carriage only - one long square block, size 20, with no rail, no preload position and no rail length in the code. X-set 45 degree arc raceways give four rows of balls two-point contact each, so side and lift-off loads rate the same as vertical ones, and small datum errors are absorbed inside the block instead of showing up as binding. Its rail is a true 20 mm wide.
Numbers for this block: 22.2 kN basic dynamic, 37.6 kN basic static, and moment ratings of 0.35 kN.m in MR with 0.34 kN.m in MP and My. Accuracy here is precision grade, but the catalogue caution applies - whether the rail sits flat against its datum face and is torqued correctly has a large effect on the accuracy you actually achieve. The mating rail must carry the matching C pairing code.
Airtac LSH Linear Guide Block LSH20BK-HL-P-C-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-HL-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 | 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-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. |
| 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-C-M6 Is Used
Welding jig carriage on a fixture frame
An aluminium fixture base machined with a corner radius at or below the 0.5 mm limit takes this P-grade block, whose self-alignment absorbs the small residual datum error within allowed values.
Modular fixture plate axis
A reconfigurable jig system gains a 20 mm guided axis: the C-coded long carriage bolts on, and the side M6 nipple is checked for clearance against adjacent hardware before the cover goes on.
Bolted retrofit on a press feeder
A mechanical feeder is converted to rolling guidance; pulling the rail flat to its datum and correct M5 torque - 588 N.cm into the cast iron body - decide the accuracy the precision block delivers.
Is the Airtac LSH Linear Guide Block LSH20BK-HL-P-C-M6 the Right Guide?
Precision grade returns little if the mounting surface is out. Size 20 with no preload allows 25 um of parallelism error over a 500 mm span, and less once preload is specified, so datum quality decides whether the P grade earns its keep - send us the drawing if you want it reviewed. Downsize to LRM for light compact duties, with the caveat that its ratings are unpublished and confirmed by us; choose LGC when travel is short and crossed-roller rigidity is the goal; step up to LSH25, on a 23 mm rail, when moment governs.
Before ordering, check: the form is carriage only, size by load and moment, style and length, count and rail length, the accuracy and preload you would pick on a full set - knowing that preload narrows installation latitude, since size 20 tolerates 130 um of height error without preload but only 85 at light and 50 at medium - the grease fitting, and the pairing code, which is C on the matching 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 Block LSH20BK-HL-P-C-M6 FAQ
Yes: dynamic rating 22.2 kN, static rating 37.6 kN, and moment ratings of 0.35 kN.m (MR) and 0.34 kN.m (MP and My) per carriage. Precision grade parallelism runs 3-21 um over the rail length. Rail screws are M5 at 882 / 588 / 441 N.cm for steel / cast iron / aluminium bases. Grease fill is 2.7 cm3 with 0.9 cm3 top-ups, on a 100 km or 3-to-6-month cycle.
The box holds one long square carriage, size 20, precision grade, with an M6 nipple - and nothing else. No rail, and therefore no preload position in the code. The pairing letter C must match the letter on the rail the block is fitted to; without the match, smoothness, preload feel and accuracy are not guaranteed. The letter is marked on the original part.
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-C-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.