Airtac LSH Linear Guide Block LSH20BK-HL-P-D-M6
The AirTAC LSH Linear Guide Block LSH20BK-HL-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-HL-P-D-M6
This listing is the carriage on its own: LSH20BK-HL-P-D-M6, a long square block in precision grade with an M6 grease fitting, and no rail in the box. Four rows of recirculating balls run in X-arranged 45 degree arc raceways with two contact points per ball, so the block carries load equally in all four directions and absorbs slight mounting-surface error inside itself. The LSH20 rail it pairs with is 20 mm wide.
Per-carriage ratings for this long size 20 block: 22.2 kN dynamic C, 37.6 kN static C0, moments 0.35 / 0.34 / 0.34 kN.m (MR / MP / My). Going long lifts the MR moment about 30 percent over the standard block while dynamic rating rises only about 19 percent, so a cantilevered camera or tool usually decides the size on MR, not C. Running parallelism in precision grade sits in a 3-21 um band by rail length.
Airtac LSH Linear Guide Block LSH20BK-HL-P-D-M6 Technical Specifications
| Model | Airtac LSH Linear Guide Block LSH20BK-HL-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 | 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 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-HL-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-HL-P-D-M6 Is Used
Pick-and-place vision bridge
A gantry robot carries a vision camera overhung from the Z slide; the long block's 0.35 kN.m MR rating resists tipping where a standard block would run out of moment first.
Optical inspection stage
Rebuilding a coordinate measuring fixture with a precision-grade carriage keeps running parallelism inside a 3-21 um band, tight enough for repeatable probe readings.
CNC router gantry rebuild
Swap a seized block on a hobby router's gantry without buying a new rail - order by pairing code D and the old rail carries on with its original accuracy.
Is the Airtac LSH Linear Guide Block LSH20BK-HL-P-D-M6 the Right Guide?
Size this carriage on moment before load. The long block gives MR 0.35 kN.m; if your overhang exceeds that, step up to LSH25 (MR 0.44 kN.m, true rail width 23 mm) or run two carriages to fight tipping along the travel. If the duty is genuinely light and the envelope tight, the slim LRM family is the compact choice - its load ratings are not published, so we confirm them against your duty by RFQ. For short travel that needs crossed-roller rigidity rather than long recirculating travel, step across to LGC. Checklist before you order: carriage-only form, size by load and moment, square style, long length, precision grade, M6 fitting, and pairing code D taken off the old carriage or 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-D-M6 FAQ
Per carriage: dynamic C 22.2 kN, static C0 37.6 kN, allowable moments MR 0.35, MP 0.34, My 0.34 kN.m. Running parallelism in precision grade: 3-21 um by rail length band. Rail mounting screws for LSH20 are M5 at 882 / 588 / 441 N.cm in steel / cast iron / aluminium. Grease: 2.7 cm3 first charge on the long block, 0.9 cm3 top-up, refreshed every 100 km of travel or every 3 to 6 months; speeds up to 60 m/min suit grease.
No - the box holds one long square carriage only, no rail, and no preload position exists in this code. Rails and carriages carry a pairing letter; a D carriage belongs on a D rail. Any LSH20 carriage fits any LSH20 rail of the same model and keeps its smoothness, preload and accuracy, but that interchange is within LSH only - never assume another maker's rail. Order the letter off the original part, or buy a matched set if the rail itself is worn.
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-D-M6
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.