Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H
The AirTAC LGC Series Cross Roller Guide Rail LGC2A135R28-H is a crossed roller guide using Ø2.0 mm precision rollers. Rollers are held in a cage in alternating orientation between hardened V-raceways, giving line contact instead of point contact — much higher rigidity and accuracy than a ball guide of similar size. It does NOT recirculate, so travel is set by rail length and the cage travels about half the stroke.
- SeriesLGC
- Supplied asComplete guide set
- SizeLGC2
- Roller diameterØ2.0 mm
- Rollers in cage28
- Rail length135 mm
- 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 LGC Series Cross Roller Guide Rail LGC2A135R28-H
The LGC2A135R28-H is not a part you bolt on and forget - it is a fitted component. This AirTAC LGC complete guide pairs a 135 mm stainless steel rail with a three-row cage of 28 rollers, each 2.0 mm in diameter, ordered in grade H. Crossed rollers run in hardened V-raceways with line contact, and because nothing recirculates the assembly is set up in place, adjusted against a dial indicator until the achieved accuracy is what your machine needs.
Each roller is rated 292 N dynamic and 290 N static per roller - the static value being the smaller, unlike a ball guide - and the 28 rollers in this cage spread that per-roller capacity across the full contact set. Final accuracy on a crossed roller guide is set as much by the fitted adjustment as by the ordered grade, which is why a carefully installed H set often outperforms a hastily fitted P one. Mounting accuracy and preload must be adjusted properly before use; over-preloading can damage the raceway or twist the rail.
Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H |
|---|---|
| Series | LGC Series Crossed Roller Guide |
| Supplied as | Complete guide set |
| Construction | Crossed precision rollers in a cage, NON-recirculating, line contact |
| Size code | LGC2 |
| Roller diameter | Ø2.0 mm |
| Rollers per cage | 28 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Rail length | 135 mm |
| Basic dynamic load rating C | 292 N per roller |
|---|---|
| Basic static load rating C0 | 290 N per roller |
| Accuracy grade | H — high grade |
| Mounting screws | Per catalogue tightening-torque table |
| Lubrication | Per catalogue; adjust clearance and preload before use |
| Interchangeability | LGC carriages fit LGC rails of the same model |
Specifications follow the official AirTAC LGC catalogue. Load ratings are stated PER ROLLER, not per guide — total capacity depends on how many rollers the cage carries, which is why the roller count is part of the order code. Maximum stroke and tightening torques are given in the catalogue tables; ask us for the figure for your size.
Model Code: Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 2 | Size code — sets the roller diameter (Ø2.0 mm). |
| A / B | Row arrangement: A three-row, B four-row. |
| 135 | Rail length in mm. |
| R28 | Cage carrying 28 rollers. |
| -H / -P | Accuracy grade: H high, P precision. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 135 mm |
| Carriage | Yes |
Rail and carriage(s) supplied together, matched as a set. 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 LGC Series Cross Roller Guide Rail LGC2A135R28-H Is Used
Wafer inspection stage
A short-travel inspection stage in semiconductor back-end inspection, where the 28-roller cage spreads load across more contact points for stability under a camera head.
X-ray equipment slide
The slide section of X-ray equipment, where the manufacturer specifies crossed roller guides for smooth, highly repeatable positioning of the source or detector.
Optical bench build
Building positioning carriers into a custom optical bench, with the dial-indicator adjustment planned into assembly time from the outset.
Is the Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H the Right Guide?
Checklist for this SKU: form first - this is the complete guide (rail, cage and mating rails), not the spare cage. The size 2 code fixes roller diameter at 2.0 mm, and the R28 fixes the cage at 28 rollers; both figures matter because capacity scales with roller count. The A in the code is the three-row arrangement and 135 is the rail length, selected from the maximum-stroke table with the working stroke set shorter than the maximum. Grade H is what we stock; grade P can be ordered. Choose the clearance scheme during design, not at install: adjusting screws for ordinary clearance, a pressure plate where rigidity and accuracy are demanded, a taper block for the most demanding cases. If travel beyond about half a metre is needed, step across to LSH; for light loads in a small envelope, LRM suits better. And never mix rails between sets - accuracy is guaranteed only as a matched set.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Worst-case moment, not just straight load
- ✓ Travel length and mounting space
- ✓ Stroke shorter than the rail allows for cage travel
- ✓ Clearance method: screws, plate or taper block
- ✓ 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 Centre the roller cage on the rail during assembly.
- check Adjust with a dial indicator over the full stroke.
- check Never mix rails from different sets — accuracy is matched per set.
- check Installation by qualified personnel per AirTAC docs.
Airtac LGC Series Cross Roller Guide Rail LGC2A135R28-H FAQ
Size 2 gives 2.0 mm roller diameter; per roller the ratings are 292 N dynamic and 290 N static. The code's R28 is the cage roller count - 28 rollers - and the arrangement is three-row (A) on a 135 mm rail, accuracy grade H. A total guide rating is not a number we publish, since it derives from load distribution and contact angle; what we can say is that capacity scales with the 28 rollers, and we are glad to run the sizing with you.
Cage drift is a known behaviour of non-recirculating guides: vibration, high acceleration, eccentric loads or uneven preload can shift the roller cage along the rail. The fix is simple - stroke the slide through several full cycles and the cage returns to near centre. If drift recurs, check the mounting structure for insufficient rigidity, misaligned rails or uneven preload, and remember that on vertical axes gravity makes drift accumulate in one direction, so leave stroke margin there.
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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 LGC Series Cross Roller Guide Rail LGC2A135R28-H
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