Airtac LGC Series Cross Roller Guide Rail LGC2A135R25-H
The AirTAC LGC Series Cross Roller Guide Rail LGC2A135R25-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 cage25
- 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 LGC2A135R25-H
LGC2A135R25-H is a complete AirTAC LGC crossed roller guide in size 2, three-row arrangement: a 135 mm stainless steel rail with a cage carrying 25 rollers of 2.0 mm diameter, supplied in accuracy grade H. Precision cylindrical rollers sit crossed between hardened V-grooves, so each roller meets the raceway along a line rather than at a point - the geometry that gives the guide its rigidity and load capacity. The rollers do not recirculate, so travel is finite and set by the rail length rather than endless.
Ratings are quoted per roller: 292 N dynamic and 290 N static for the 2.0 mm rollers, with total capacity scaling with the 25 contact points in this cage. Note that the static figure sits just below the dynamic one - the reverse of a ball guide - so sizing habits carried over from recirculating guides do not apply here. When the slide moves, the cage travels with it by roughly half the stroke, which is why the 135 mm rail must be chosen from the manufacturer's maximum-stroke table with the working stroke set slightly shorter.
Airtac LGC Series Cross Roller Guide Rail LGC2A135R25-H Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC2A135R25-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 | 25 |
| 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 LGC2A135R25-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. |
| R25 | Cage carrying 25 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 LGC2A135R25-H Is Used
PCB drilling spindle slide
Carrying a drilling spindle over a short, repeatable stroke on a PCB drilling machine, where line-contact rigidity holds hole position run after run.
Optical bench carrier
A carrier on an optical bench that must return to position without drift, with the three-row layout resisting overturning moments from mounted optics.
Optical test instrument axis
The measurement axis of an optical test instrument, adjusted in place with a dial indicator so straightness is tuned into the assembly.
Is the Airtac LGC Series Cross Roller Guide Rail LGC2A135R25-H the Right Guide?
This is a complete guide set, so first confirm you want the whole assembly rather than a spare cage. Size 2 means 2.0 mm rollers; choose the cage roller count together with the rail length, taking the length from the maximum-stroke table and keeping the working stroke shorter because the cage walks along the rail. If your travel exceeds roughly half a metre, or you want a sealed recirculating unit that bolts on, move across to AirTAC LSH instead; if the duty is light and space is tight, LRM is the smaller step down. For this part: three-row A arrangement, 135 mm rail, 25-roller cage, grade H from stock (grade P is available to order). Decide the clearance method early - adjusting screws for ordinary clearance, a pressure plate for higher rigidity, a taper block for the highest - because it affects the surrounding machining. Plan the assembly and dial-indicator adjustment into the build schedule; accuracy is controlled as a matched set and rails from different sets must never be mixed.
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 LGC2A135R25-H FAQ
This is a size 2 guide, so rollers are 2.0 mm in diameter. Per roller, the catalogue ratings are 292 N dynamic and 290 N static. The configuration is three-row (A), with a 135 mm rail and a cage of 25 rollers, supplied in grade H accuracy. We do not publish a per-guide load total, because it depends on load distribution and contact angle; total capacity scales with the roller count, so send us your load case and we will help size it.
Less than 135 mm. Because the rollers never recirculate, the cage moves along the rail with the slide - by about half the stroke - so the usable stroke is shorter than the rail and must be taken from the manufacturer's maximum-stroke table. If the cage ever drifts out of centre from vibration, eccentric loading or acceleration, running the slide through several full strokes brings it back near centre. On a vertical axis, gravity pushes drift one way, so leave extra 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 LGC2A135R25-H
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