Airtac LGC Series Cross Roller Guide Rail LGC3B125R16-H
The AirTAC LGC Series Cross Roller Guide Rail LGC3B125R16-H is a crossed roller guide using Ø3.0 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
- SizeLGC3
- Roller diameterØ3.0 mm
- Rollers in cage16
- Rail length25 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 LGC3B125R16-H
The LGC3B125R16-H is a four-row crossed roller guide set: a 125 mm stainless steel rail system with a 16-roller cage, size 3 (3.0 mm rollers), accuracy grade H. Four rails in crossed-V orientation give a symmetric, higher-capacity layout than the three-row variant. This is a fitted component, not a bolt-on one: the guide is assembled in place and adjusted with a dial indicator, and the accuracy you end up with depends on that adjustment. Nothing recirculates, so the 125 mm rail - not a stroke setting - defines the travel.
Each roller is rated 640 N dynamic and 610 N static, per roller; do not multiply these out, because total capacity rises with roller count through load distribution the catalogue does not tabulate. Accuracy is controlled as a matched set, so never mix rails from different sets. Expect the cage to walk with the slide by about half the travel, and reserve real build time for the dial-indicator setup and the screw-tightening sequence through the full stroke.
Airtac LGC Series Cross Roller Guide Rail LGC3B125R16-H Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC3B125R16-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 | LGC3 |
| Roller diameter | Ø3.0 mm |
| Rollers per cage | 16 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Rail length | 25 mm |
| Basic dynamic load rating C | 640 N per roller |
|---|---|
| Basic static load rating C0 | 610 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 LGC3B125R16-H
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 3 | Size code — sets the roller diameter (Ø3.0 mm). |
| A / B | Row arrangement: A three-row, B four-row. |
| 25 | Rail length in mm. |
| R16 | Cage carrying 16 rollers. |
| -H / -P | Accuracy grade: H high, P precision. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 25 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 LGC3B125R16-H Is Used
X-ray equipment slide
Detector and collimator slides in X-ray equipment need smooth, repeatable short travel; the four-row crossed geometry keeps the beam path stable through thousands of positioning cycles.
Gauge block comparator stage
A comparator anvil that repeats over a few millimetres gains from 3.0 mm rollers in line contact: the stage returns to datum without the microscopic wander that point contact can introduce.
Optical bench fixture carrier
On a 125 mm rail, a fixture carrier for optical assembly holds its alignment under clamping loads, because the four V-raceways share the load from more directions than a three-row guide.
Is the Airtac LGC Series Cross Roller Guide Rail LGC3B125R16-H the Right Guide?
Start with the form: LGC3B125R16-H is a complete matched-set guide, and a worn cage should be ordered separately as LGC3R16 rather than by swapping parts between sets. Confirm size and roller count together - 3.0 mm rollers, 16 per cage - then check the four-row arrangement suits the loading. Rail length comes from the maximum-stroke table, with the working stroke kept below it to allow for cage travel. We stock grade H and order grade P. Choose the clearance method before machining the mounting: adjusting screws for ordinary clearance, a pressure plate where rigidity and accuracy matter more, a taper block for the highest demands. Assembly and dial-indicator adjustment take bench time - plan for them. Long travel or a preference for a sealed, bolt-on recirculating carriage points to LSH; light duty in a tight space points to LRM.
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 LGC3B125R16-H FAQ
The size 3 rollers are 3.0 mm in diameter, each rated 640 N dynamic and 610 N static, with both figures quoted per roller. The set is four-row (B), 125 mm rail, a 16-roller cage, high accuracy grade H. Because capacity depends on how load distributes across the 16 rollers rather than on a number we can multiply and publish, tell us the load and application and we will help size it.
It is not one. LGC is non-recirculating: the rollers stay in the cage, travel ends at the rail ends, and the cage drifts along with the slide by roughly half the stroke. It is also assembled and adjusted in place with a dial indicator, with clearance set by adjusting screws, a pressure plate or a taper block. If you want a sealed, bolt-on carriage with unlimited travel, AirTAC LSH is the better family - and for very light duty, LRM.
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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 LGC3B125R16-H
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